Wihuri Physical Laboratory

Matemaattis-luonnontieteellinen tiedekunta

Publications of NMR group since 1.1.1980

1980: Papers

Punkkinen, M.: Temperature dependence of the librational tunneling and proton relaxation. - Phys. Rev. B 21,54-60 (1980).

Conference abstracts, reports etc.

Koivula, E., Komu, M. & Oksman, P.: An equipment for NMR imaging. - Proc. Ann. Conf. Finnish Phys. Soc., Feb. 8-9, 1980, Haikko, Finland, pap.7:10.
Punkkinen, M., Ylinen, E.E. & Ingman, L.P.: Proton relaxation and tunneling levels of NH₄⁺- ions in a (NH₄)₂SnCl₆ single crystal. - Proc. Ann. Conf. Finnish Phys. Soc., Feb. 8-9, 1980, Haikko, Finland, pap.7:11.
Punkkinen, M., Ylinen, E.E. & Ingman, L.P.: NMR and librational tunneling in ammonium compounds. - Rep. No. 77, Department of Physics, University of Oulu, Finland, 1980.
Punkkinen, M., Ylinen, E.E. & Ingman, L.P.: Evidence for two motions of NH₄⁺ ions in (NH₄)₂SnCl₆ - Proc. Joint ISMAR-AMPERE Internat. Conf. on Magnetic Resonance, Delft, The Netherlands, 1980 (The Franklin Institute Press, 1981) p.134.
Ylinen E.: Matalaerotteisesta NMR:stä kiinteän olomuodon fysiikan tutkimuksessa. - Kemia- Kemi 7(1-2),20-21 (1980).

1981: Papers

Niemelä, L.K.E & Heinilä, J.E.: Proton magnetic relaxation in N(CH₃)₄ZnCl₄. - Chem. Phys. Letters 82,182-184 (1981).
Oksman, P.H., Komu, M.E.S., Koivula, E.K. & Punkkinen, M.: Spin Imaging equipment for small animal experiments. - Ann. Acad. Sci. Fenn. A VI, No.428 (1981).

Conference abstracts, reports etc.

Becker, K.D., Komu, M. & Punkkinen, M.: Experimental method dependent proton Zeeman relaxation in KHF2. - Proc. XV Ann. Conf. Finnish Phys. Soc., Feb. 6-7, 1981, Turku, Finland, pap.7:20.
Ingman, L.P., Punkkinen, M. & Ylinen, E.E.: Librational tunneling in (NH₄)₂SnBr₆ by NMR. - Proc. XV Ann. Conf. Finnish Phys. Soc., Feb. 6-7, 1981, Turku, Finland, pap.7:21.
Koivula, E., Komu, M. & Oksman, P.: Homogenization of a magnetic field for NMR imaging. - Proc. XV Ann. Conf. Finnish Phys. Soc., Feb. 6-7, 1981, Turku, Finland, pap.7:22.
Koivula, E., Komu, M., Oksman, P. & Punkkinen, M.: Mediumsize NMR imaging equipment. - Proc. XV Ann. Conf. Finnish Phys. Soc., Feb. 6-7, 1981, Turku, Finland, pap.7:23.

1982: Papers

Ingman, L.P., Punkkinen, M. & Ylinen, E.E.: Librational tunneling of NH₄⁺ in [K₂]_0.78[(NH₄)₂_]0.22SnCl₆. - Chem. Phys. Letters 88(6),599-601 (1982).
Tulin, V., Komu, M., Mäkelä, J., Oksman, P. & Punkkinen, M.: Temperature dependence of the magnetization in domain walls in ferromagnetic CrBr₃. - JETP Lett. 35,571 (1982).
Punkkinen, M., Ylinen, E.E. & Ingman, L.P.: Nuclear-spin diffusion in (NH₄)₂SnBr₆. - Phys. Rev. B 26,3943-3945 (1982).

Conference abstracts, reports etc.

Ingman, L.P.: Numerical calculation for homogenized magnetic field. - Proc. XVI Ann. Conf. Finnish Phys. Soc., Feb. 12-13, 1982, Espoo, Finland, pap.0:2.
Ingman, P., Punkkinen, M. & Ylinen, E.: Librational tunneling of ammonium ions in mixed crystals. - Proc. XVI Ann. Conf. Finnish Phys. Soc., Feb. 12-13, 1982, Espoo, Finland, pap.7:10.
Komu, M., Koski, H., Oksman, P. & Punkkinen, M.: Progress in medium-size NMR imaging. - Proc. XVI Ann. Conf. Finnish Phys. Soc., Feb. 12-13, 1982, Espoo, Finland, pap.7:11.
Komu, M. & Niemelä, L.: Fluorine Zeeman and dipolar relaxation in CsAsF₆. - 5th Soviet- Finnish Symposium on Low Temp. and Solid State Phys., 1982, Otaniemi, Finland.

1983: Papers

Punkkinen, M., Ylinen, E.E. & Ingman, L.P.: NMR and librational tunneling in some ammonium compounds. - Bulletin of Magnetic Resonance Vol.5, No.3/4, pp.133-135 (1983).

Conference abstracts, reports etc.

Ingman, P., Koivula, E., Komu, M., Niemelä, L., Punkkinen, M. & Ylinen, E.: Ydinmagneettinen resonanssitutkimus Turun yliopiston fysiikan laitoksilla. - III Fysiikan päivä 10.10.1983, Kvantti IV-83, Report Series L31, Dep. Phys. Sci., Univ. Turku, 1983.
Ingman, L.P., Punkkinen, M., Ylinen, E.E. & Dimitropoulos, C.: Librational energy levels of the NH₄⁺-ions in a (NH₄)₂SnBr₆ single crystal. - Proc. XVII Ann. Conf. Finnish Phys. Soc., Feb. 11-12, 1983, Joensuu, Finland, pap.7:20.
Komu, M., Määttänen, H., Oksman, P. & Punkkinen, M.: A digital phase shifter for gradient currents of NMR-imaging apparatus. - Proc. XVII Ann. Conf. Finnish Phys. Soc., Feb. 11-12, 1983, Joensuu, Finland, pap.7:18.
Komu, M. & Niemelä, L.: A NMR study of reorientational motions in CsAsF₆. - Proc. XVII Ann. Conf. Finnish Phys. Soc., Feb. 11-12, 1983, Joensuu, Finland, pap.7:17.
Punkkinen, M., Ingman, L.P. & Ylinen, E.E.: Nuclear spin diffusion between tunneling NH₄⁺- ions. - Proc. XVII Ann. Conf. Finnish Phys. Soc., Feb. 11-12, 1983, Joensuu, Finland, pap.7:19.

1984: Conference abstracts, reports etc.

Ingman, L.P., Dimitropoulos, C., Punkkinen, M. & Ylinen, E.E.: Librational tunneling and spin diffusion in (NH₄)₂SnBr₆. - Proc. Quantum Molecular Motion in Crystals and Intercalates and on Surfaces Conf., March 26-28, 1984, Nottingham, England.
Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: A measurement of rotational tunneling splitting of ND₄⁺ in (ND₄)₂SnCl₆ by level-crossing line shapes. - Proc. XVIII Ann. Conf. Finnish Phys. Soc., Feb. 3-4, 1984, Hämeenlinna, Finland, pap.7:22.
Ingman, L.P., Koivula, E., Punkkinen, M., Ylinen, E.E. & Lalowicz, Z.T.: Librational tunneling of ND₄⁺ in (ND₄)₂SnCl₆ by level-crossing line shapes. - Proc. XXII Congress AMPERE on Magnetic Resonance and Related Phenomena, September 1984, Zürich, Switzerland, p.408.
Koivula, E., Komu, M. & Korkiamäki, S.: A Poor man's spectral analysis system using standard techniques. - Proc. XVIII Ann. Conf. Finnish Phys. Soc., Feb. 3-4, 1984, Hämeenlinna, Finland, pap.0:16.
Koivula, E., Punkkinen, M., Tanttila W.H. & Ylinen, E.E.: A measurement of T₁ and T_1D on glasseous glycerol. - Proc. XVIII Ann. Conf. Finnish Phys. Soc., Feb. 3-4, 1984, Hämeenlinna, Finland, pap.7:23.
Meier, B.H., Punkkinen, M. & Ernst, R.R.: Torsional tunneling and the proton NMR and relaxation in sodium acetate. - Proc. First Nordic Symp. on NMR Spectroscopy, June 12-15, 1984, Turku, Finland.
Nummi, P. & Komu, M.: Relaxation times of clotted blood and serum as a function of storage time. - Proc. XVIII Ann. Conf. Finnish Phys. Soc., Feb. 3-4, 1984, Hämeenlinna, Finland, pap.8:18.

1985: Papers

Abesadze, T.Sh. & Punkkinen, M.: Discrete saturation of the optical absorption line of Pr³⁺ in CaF₂ under the condition of pumping. - Phys. Status Solidi B 131,K153-K155 (1985).
Ingman, L.P., Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: Proton spin-lattice relaxation and ammonium tunnelling in (NH₄)₂ZnCl₄. - J. Phys. C: Solid State Phys. 18,5033-5041 (1985).
Koivula, E., Punkkinen, M., Tanttila, W.H. & Ylinen, E.E.: Dynamics of proton spin-lattice relaxation in glycerol. - Phys. Rev. B 32,4556-4564 (1985).

Conference abstracts, reports etc.

Abesadze, T.Sh., Buishvili, L.L., Ingman, L.P. & Punkkinen, M.: Discrete saturation of the EPR line for an electron system containing nuclear spins I=1. - Proc. XIX Ann. Conf. Finnish Phys. Soc., Feb. 8-9, 1985, Oulu, Finland, pap.7:19.
Abesadze, T.Sh., Ingman, P. & Punkkinen, M.: The envelope modulation of the photon echo signal connected with the Zeeman and superhyperfine splittings of atomic levels. - Report Series R82, Dep. Phys. Sci., Univ. Turku (1985).
Ingman, P., Koivula, E., Komu, M., Niemelä, L., Punkkinen, M., Vuorimäki, A. & Ylinen, E.: Ydinmagneettinen resonanssitutkimus Turun yliopiston fysiikan laitoksilla. - IV Fysiikan päivä 28.10.1985, Turku. Report Series L40, Dep. Phys. Sci., Univ. Turku, pp.21-22.
Ingman, P., Koivula, E., Komu, M., Punkkinen, M., Vuorimäki, A. & Ylinen, E.: Nuclear spin diffusion between tunneling NH₄⁺-ions in solids. - Abstr. 7th Specialized Colloque AMPERE, Sept. 9-13, 1985, Bucharest, Romania, p.41 (invited).
Ingman, L.P., Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: Ammonium tunneling in (NH₄)₂ZnCl₄. - Proc. XIX Ann. Conf. Finnish Phys. Soc., Feb. 8-9, 1985, Oulu, Finland, pap.7:20.
Punkkinen, M.: Ydinmagneettisesta resonanssista. - Lääketiede 85 Medicin luento- lyhennelmät, p.320.

1986: Papers

Coppens, P., Punkkinen, M., Vandemaele, G. & Van Gerven, L.: Coupled (Zeeman-tunnel)-lattice relaxation of the methyl group in copper acetate. - Phys. Rev. B 33, 7494-7502 (1986).
Fröberg,S., Niemelä, L. & Ylinen, E.: Quadrupole coupling constants of deuteron and boron nuclei in solid KBD₄, Phys. Lett. A115,67-68 (1986).
Ingman, L.P., Punkkinen, M., Ylinen, E.E. & Dimitropoulos, C.: Proton relaxation and tunneling levels of NH₄⁺ ions in an (NH₄)₂SnBr₆ single crystal. - Chem. Phys. Lett. 125,170-173 (1986).

Conference abstracts, reports etc.

Ingman, P., Koivula, E., Komu, M., Punkkinen, M., Vuorimäki, A. & Ylinen, E.: Nuclear spin diffusion between tunneling ammonium ions in solids. - Proc. XX Ann. Conf. of the Finnish Phys. Soc., Feb. 6-8, 1986, Tampere, Finland, pap.7:21.
Ingman, P., Koivula, E., Komu, M., Punkkinen, M., Vuorimäki, A. & Ylinen, E.: Effects of librational tunneling on the proton magnetic resonance and relaxation in ammonium compounds. - Abstr. 8th European Experimental NMR Conf., June 3-6, 1986, Spa, Belgium, pp.30-31 (invited).
Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: A new method to measure the rotational tunneling frequencies of ND₄⁺ ion. - Abstr. XXIII Congress AMPERE on Magnetic Resonance, Sept. 15-19, 1986, Roma, Italy, pp.328-329.
Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: Tunneling to reorientation transition effects in high field ²H-NMR spectra of ND₄⁺ ions. - Quantum Aspects of Molecular Motions in Solids, Proc. of an ILL-IFF Workshop, Sept. 24-26, 1986, Grenoble, France. Springer Proc. Phys. 17 (Springer-Verlag, Berlin, 1987) pp.122-127.
Ingman, L.P., Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: Nuclear spin diffusion and the relaxation of the dipolar energy in tunneling ammonium compounds. - Abstr. 9th Meeting of ISMAR, June 29 - July 5, 1986, Rio de Janeiro, Brazil, pap.A13.

1987: Papers

Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: ²H-NMR study of ammonium ion rotational tunneling and reorientation in (ND₄)₂SnCl₆ single crystal. I. Tunneling frequency measurements. - Z. Phys. B 66,363-373 (1987).
Vuorimäki, A.H., Punkkinen, M. & Ylinen, E.E.: Variation of the NMR lineshape with the RF pulse length in non-equilibrium three-spin systems. - J. Phys. C: Solid State Phys. 20, L749-L753 (1987).

Conference abstracts, reports etc.

Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: A new method to measure the rotational tunneling frequencies of ND₄⁺ ion by NMR line shapes. - Proc. XXI Ann. Conf. Finnish Phys. Soc., Feb. 5-7, 1987, Mariehamn, Åland, pap.7:15.
Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: The determination of the rotational tunneling frequencies in solids containing ND₄-groups. - Abstr. 2nd Nordic Symp. on NMR Spectroscopy, August 24-26, 1987, Uppsala, Sweden, p.19.
Ingman, L.P., Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E: Nuclear spin cross-relaxation of protons in ammonium compounds at low temperatures. - Abstr. 7th Gen. Conf. European Phys. Soc., August 10-14, 1987, Espoo, Finland, p.209.
Vuorimäki, A.H. & Punkkinen, M.: NMR line shapes of nonequilibrium three-spin systems. - Abstr. 7th Gen. Conf. European Phys. Soc., August 10-14, 1987, Espoo, Finland, p.208.
Vuorimäki, A.H., Punkkinen, M. & Ylinen, E.E.: NMR line shape and spin diffusion in three-spin systems. - Abstr. 2nd Nordic Symp. on NMR Spectroscopy, August 24-26, 1987, Uppsala, Sweden, p.18 (invited).
Vuorimäki, A., Ylinen, E. & Punkkinen, M.: Limited nuclear spin diffusion and temperature dependence of cross relaxation in CF₃COOAg. - Proc. XXI Ann. Conf. Finnish Phys. Soc., Feb. 5-7, 1987, Mariehamn, Åland, pap.7:16.

1988: Papers

Crits, E., Van Gerven, L., Ingman, L.P., Ylinen, E., Punkkinen, M. & Emid, S.: Spin-lattice relaxation measurements in lithium acetate revisited. - Physica B 154,97-104 (1988).
Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: Rotational tunneling effects in ²H-NMR spectra of polycrystalline (ND₄)₂SnCl₆. - J. Chem. Phys. 88,58-67 (1988).
Punkkinen,M., Pyy,J.P., Vuorimäki,A.H. & Ylinen,E.E.: Spin-lattice relaxation of the nuclear dipolar energy and spin diffusion in NH₄ClO₄. - Chem. Phys. Lett. 145,567-570 (1988).
Segel, S.L., Maxwell, S., Heyding, R.D., Ingman, P., Ylinen, E. & Punkkinen, M.: Temperature dependence of the chlorine 35 quadrupole interaction in ammonium perchlorate from 4 K to 340 K. - Solid State Comm. 66,1039-1041 (1988).

Conference abstracts, reports etc.

Birczynski, A., Lalowicz, Z.T., Ingman, L.P., Punkkinen, M. & Ylinen, E.E.: Deuteron NMR spectra of ammonium perchlorate single crystal. - Workshop on Quantum Aspects of Molecular Motions in Solids, August 24-26, 1988, Turku, Finland.
Birczynski, A., Lalowicz, Z.T., Ingman, L.P., Punkkinen, M. & Ylinen, E.E.: Proton and deuteron NMR spectra of ammonium perchlorate single crystals. - Proc. 24th AMPERE Congress, Poznaþ, 1988, p.851-856.
Ingman, L.P., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: Librational tunneling and spin-lattice relaxation in (ND₄)₂SnCl₆ by NMR. - Proc. XXII Ann. Conf. Finnish Phys. Soc., March 24-26, 1988, Jyväskylä, Finland, pap.7:26.
Ingman, L.P., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: Spin-lattice relaxation of deuterons in (ND4)2SnCl6 and librational tunneling. - Proc. 10th AMPERE Summer School and Symposium on Magnetic Resonance and Relaxation, Sept. 4-10, 1988, Portoroz, Yugoslavia, p.172-173.
Punkkinen, M., Ylinen, E., Ingman, P., Vuorimäki, A., Määttänen, H. & Tervakoski, A. (Editors): Workshop on Quantum Aspects of Molecular Motions in Solids, August 24-26, 1988, Turku, Finland. Book of abstracts.
Vuorimäki, A.: Apparently non-monotonic relaxation of nuclear magnetization in CF₃COOAg. - Proc. XXII Ann. Conf. Finnish Phys.Soc., March 24-26, 1988, Jyväskylä, Finland, pap.7:27.
Vuorimäki, A. & Punkkinen, M.: Fourier transform NMR spectra of non-equilibrium three-spin systems. - Proc. XXII Ann. Conf. Finnish Phys. Soc., March 24-26, 1988, Jyväskylä, Finland, pap.7:28.
Vuorimäki, A.H. & Punkkinen, M.: Spin diffusion of the methyl protons in lithium and sodium acetates. - Workshop on Quantum Aspects of Molecular Motions in Solids, August 24-26, 1988, Turku, Finland.

1989: Papers

Vuorimäki, A.H. & Punkkinen, M.: Internal non-equilibrium studied by RF pulses in the system of three nuclear ½-spins. - J. Phys.: Condens. Matter 1,9219-9229 (1989); Erratum 3,8011 (1991).
Vuorimäki, A.H., Punkkinen, M. & Ylinen, E.E.: NMR line shape and cross relaxation of tunneling ammonium protons in (NH₄)₂ZnCl₄. - Chem. Phys. Lett. 161,561-566 (1989).

Conference abstracts, reports etc.

Ingman, L.P., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: Torsional ground level structure of tunneling ammonium ions in solids. - Proc. XXIII Ann. Conf. Finnish Phys. Soc., March 30 - April 1, 1989, Haikko, Finland, pap.7:25.
Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: Spin diffusion of nuclear magnetization in solids containing tunneling proton groups. - V Fysik dagen 14.9.1989, Åbo. IFAA 00189/300, Dep. Phys., Åbo Akademi, p.33.
Vuorimäki, A.: Nonlinear responses in FT NMR of nonequilibrium states in molecular crystals. - First Finnish Nonlinear Days, 10-11.3.1989, Turku, Abstracts. Report Series R163, Dep. Phys. Sci., Univ. Turku, p.22.
Vuorimäki, A.: Spin diffusion of methyl protons in CH₃COONa^.3D₂O. - Proc. XXIII Ann. Conf. Finnish Phys. Soc., March 30 - April 1, 1989, Haikko, Finland, pap. 7:27.
Vuorimäki, A.: Non-equilibrium NMR line shapes and spin diffusion in three and four spin systems. - Report Series D19, Dep. Phys. Sci., Univ. Turku (Dissertation, 1989).
Vuorimäki, A.H., Punkkinen, M. & Ylinen, E.E.: NMR line shape of tunneling ammonium ions in (NH₄)₂ZnCl₄. - Proc. XXIII Ann. Conf. Finnish Phys. Soc., March 30 - April 1, 1989, Haikko, Finland, pap.7:28.

1990: Papers

Ingman, L.P., Koivula, E., Punkkinen, M., Ylinen, E.E. & Lalowicz, Z.T.: Deuteron spin- lattice relaxation in (ND₄)₂SnCl₆ below 60 K. - Physica B 162,281-292 (1990).
Ingman, L.P., Koivula, E., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: ²H-NMR study of ammonium ion rotational tunneling and reorientation in (ND₄)₂SnCl₆ single crystal. III. Low magnetic field measurements. - Z. Phys. B 81,175-181 (1990).
Ingman, L.P., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: ²H-NMR study of ammonium ion rotational tunneling and reorientation in (ND₄)₂SnCl₆ single crystal. II. T levels structure. - Z. Phys. B 80,103-112 (1990).
Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: Cross relaxation of the proton magnetization in ammonium compounds. - Physica B 160,338-346 (1990).
Vuorimäki, A.H. & Punkkinen, M.: Spin diffusion of methyl protons in sodium and lithium acetates. - J. Phys.: Condens. Matter 2,993-1005 (1990).
Vuorimäki, A.H. & Punkkinen, M.: Proton spin diffusion in crystalline methyl compounds. - Order/Disorder in Solids Newsletter, Vol.7, No.4, pp.21-28 (1990).
Zogal, O.J., Punkkinen, M., Ylinen, E.E. & Stalinski, B.: Low-temperature 1H NMR spectra of AlH₃ - J. Phys.: Condens. Matter 2,1941-1944 (1990).

Conference abstracts, reports etc.

Chizhik, V.I., Mikhailov, V.I., Ylinen, E.E. & Vuorimäki, A.H.: Hydrolysis of electrolyte solutions studied by NMR. - Proc. XXIV Ann. Conf. Finnish Phys. Soc., March 29-31, 1990, Tampere, Finland, pap.23:6.
Chizhik, V.I., Mikhailov, V.I., Ylinen, E. & Vuorimäki, A.: The influence of hydrolysis on the quadrupole relaxation of monoatomic ion nuclei in the electrolyte solutions. - Extended Abstracts, 25th Congress AMPERE, Stuttgart, 1990, pp.212-213.
Lalowicz, Z.T., Sagnowski, S.F., Punkkinen, M. & Ylinen, E.E.: Multiaxis reorientation of ND₄⁺ ions: New sequential model. - Extended Abstracts, 25th Congress AMPERE, Stuttgart, 1990, pp.577-578.
Punkkinen, M.: Relaxation rates in slow-motion regime: Application to methyl groups near level crossing. - Extended Abstracts, 25th Congress AMPERE, Stuttgart, 1990, p.524.
Vuorimäki, A.H., Punkkinen, M. & Ylinen, E.E.: Methyl proton spin diffusion in solids. - Proc. XXIV Ann. Conf. Finnish Phys. Soc., March 29-31, 1990, Tampere, Finland, pap.17:5.

1991: Papers

Vuorimäki, A.H. & Punkkinen, M.: NMR Spectrum of a Pair of Triads of ½ Spins. - J. Magn. Reson. 91,539-548 (1991).

Conference abstracts, reports etc.

Birczynski, A., Lalowicz, Z.T., Punkkinen, M. & Ylinen, E.E.: Ammonium Ion Motions in ND₄ClO₄ by ²H-NMR Spectroscopy. - Symposium on the Quantum Aspects of Molecular Motions in Solids, April 3-6, 1991, Tagungsstätte Schloß Ringberg der Max-Planck- Gesellschaft, Rottach-Egern am Tegernsee, Germany, pap.21.
Punkkinen, M.: Incomplete saturation of the proton magnetization of tunneling CH₃ groups at level crossings. - Symposium on the Quantum Aspects of Molecular Motions in Solids, April 3-6, 1991, Tagungsstätte Schloß Ringberg der Max-Planck-Gesellschaft, Rottach-Egern am Tegernsee, Germany, pap.24.
Shevtsov, V.A., Ylinen, E.E., Frolov, A., Lukashevich, I.I. & Punkkinen, M.: NMR and ESR experiments on solid molecular hydrogen. - Proc. XXV Ann. Conf. Finnish Phys. Soc., March 21-23, 1991, Oulu, Finland, p.144.
Vuorimäki, A.: NMR of a Pair of Methyl Groups. - Symposium on the Quantum Aspects of Molecular Motions in Solids, April 3-6, 1991, Tagungsstätte Schloß Ringberg der Max- Planck-Gesellschaft, Rottach-Egern am Tegernsee, Germany, pap.8.
Vuorimäki, A. & Punkkinen, M.: NMR pulse responses of pairs of triads of ½ spins in solids. - Proc. XXV Ann. Conf. Finnish Phys. Soc., March 21-23, 1991, Oulu, Finland, p.145.
Zogal, O.J., Juszczak, C., Vuorimäki, A., Ylinen, E.E., Punkkinen, M. & Drulis, H.: ^{139La NMR low temperature spectra analysis in
some lanthanum hydrides. - RAMIS-91, XIV Conference on Radio- and Microwave
Spectroscopy, April 8-11, 1991, Poznan, Poland.

1992: Papers
Birczynski, A., Lalowicz, Z.T., Ingman, L.P., Punkkinen, M. & Ylinen,
E.E.: Deuteron NMR spectra of ND₄ClO₄ single crystal at low temperatures.
- Solid State Nuclear Magnetic Resonance 1,329-344 (1992).

Tulin, V.A., Vuorimäki, A.H., Ylinen, E.E. & Punkkinen,
M.: Temperature dependence of the spin-spin relaxation time of NMR
in ferromagnetic CrBr₃. - JETP Lett. 55,541-545 (1992).

Ylinen, E.E., Lalowicz, Z.T., Sagnowski, S.F., Punkkinen, M., Koivula,
E. & Ingman, L.P.: Deuteron NMR spectrum of ND₄VO₃ and some other
ammonium compounds. - Chem. Phys. Lett. 192,590-594 (1992).

Conference abstracts, reports etc.
Komu, M.: Methods for tissue characterization in low field magnetic
resonance imaging. - Ann. Univ. Turkuensis A I 195 (Dissertation, 1992).

Shevtsov, V.A., Ylinen, E.E., Malmi, P., Frolov, A., Lukashevich,
I.I. & Punkkinen, M.: Atomic-hydrogen-enchanged ortho-para conversion
in solid molecular hydrogen. - Proc. XXVI Ann. Conf. Finnish Phys. Soc.,
March 19-21, 1992, Lahti, Finland, p.10:18.

Tulin, V.A., Ylinen, E.E., Vuorimäki, A.H. & Punkkinen,
M.: Nuclear magnetic resonance in ferromagnetic CrBr₃ within the region
of domain structure existence. - Proc. XXVI Ann. Conf. Finnish Phys. Soc.,
March 19-21, 1992, Lahti, Finland, p.18:22.

Vuorimäki, A.H.: Calculation of NMR Pulse Responses for
Pairs of Spin-½ Triads. I. Single Pulse and Generalized Goldman-Shen
Sequence. - Report Turku-FL-R6, Department of Physics, University of Turku.

Zogal, O.J., Juszczak, C., Vuorimäki, A.H., Ylinen, E.E., Punkkinen,
M. & Drulis, H.: NMR line shape of ¹³⁹La in non-stoichiometric
lanthanum hydrides at low temperatures. - Proc. XXVI Ann. Conf. Finnish
Phys. Soc., March 19-21, 1992, Lahti, Finland, p.10:22.

1993: Papers
Frolov, A., Shevtsov, V., Malmi, P., Ylinen, E. & Punkkinen, M.:
Combined ESR-NMR measuring cell for investigations at helium temperatures.
- Meas. Sci. Technol. 4,639-642 (1993).

Vuorimäki, A.H.: Fluorine spin diffussion and relaxation
in CF₃COOAg. - Chem. Phys. Lett. 202,253-259 (1993).

Vuorimäki, A.H.: Response of Pairs of Spin-½ Triads
to the Generalized Goldman-Shen Pulse Sequence. - J. Magn. Reson. A 101,170-178
(1993).

Vuorimäki, A.H.: Reconsideration of the NMR three-pulse
responses of methyl protons in CH₃COONa^.3D₂O. - J. Phys.: Condens.
Matter 5,3011-3018 (1993).

Zogal, O.J., Juszczak, C., Vuorimäki, A.H., Ylinen, E.E., Punkkinen,
M. & Drulis, H.: NMR Line Shape of ¹³⁹La in Nonstoichiometric Lanthanum
Hydrides at Low Temperatures. - J. Alloys and Compounds 191,207-212 (1993).

Conference abstracts, reports etc.
Lalowicz, Z.T., Ylinen E.E., Punkkinen, M. & Vuorimäki, A.H.:
Ammonium ion tunnelling and reorientation study in ammonium tetrachloroplatinate
by proton and deuteron NMR. - Quantum Molecular Tunnelling in Solids, July
12-15, 1993, Cumberland Lodge, Windsor, U.K.

Liu, Z.S., Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.:
Effect of the grain size on the tunnel distribution in (NH₄)₂ZnCl₄. - Quantum
Molecular Tunnelling in Solids, July 12-15, 1993, Cumberland Lodge, Windsor,
U.K.

Vuorimäki, A.H.: NMR spin-echo responses in solids containing
tunnelling or reorienting CH₃ groups. - Quantum Molecular Tunnelling in
Solids, July 12-15, 1993, Cumberland Lodge, Windsor, U.K.

Vuorimäki, A.H.: Quasi-invariants of fluorine nuclear magnetism
in CF₃COOAg crystal. - Proc. XXVII Ann. Conf. Finnish Phys. Soc., March
18-20, 1993, Turku, Finland, p.2.3.

Ylinen, E.E., Lalowicz, Z.T., Punkkinen, M., Vuorimäki, A.H.,
Ingman, L.P. & Koivula, E.: Proton and deuteron NMR spin-lattice
relaxation in ammoniumtetrachloroplatinate. - Proc. XXVII Ann. Conf. Finnish
Phys. Soc., March 18-20, 1993, Turku, Finland, p.25.8.

1994: Papers
Liu, Z.S., Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.:
Effect of the grain size on the tunnel distribution in (NH₄)₂ZnCl₄. - Physica
B 202,343-345 (1994).

Shevtsov, V., Frolov, A., Lukashevich I., Ylinen, E., Malmi, P.
& Punkkinen, M.: The Ortho- to-Para Conversion in Solid Hydrogen,
Catalyzed by Hydrogen Atoms. - J. Low Temp. Phys. 95,815-833 (1994).

Conference abstracts, reports etc.
Ingman, L.P.: NMR Studies on the Torsional Ground Level Structure
of Tunneling NH₄⁺ and ND₄⁺ Ions in Solids. - Report Series D5, Dep. Phys.,
Univ. Turku (Dissertation, 1994).

Liu, Z.S., Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.:
Grain-size effect in rotational tunnelling of molecular groups in solids
studied by NMR. - Proc. XXVIII Ann. Conf. Finnish Phys. Soc., March 17-19,
1994, Järvenpää, Finland, p.12:22.

Punkkinen, M.: NMR powder spectrum of quadrupolar I = 1 nuclei.
- 12th European Experimental NMR Conference, June 5-10, 1994, Oulu, Finland,
Abstracts, p.166.

Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: Search
for an incomplete saturation of the proton magnetization after a 90^opulse in methylurea crystal. - 12th European Experimental NMR Conference,
June 5-10, 1994, Oulu, Finland, Abstracts, p.103.

Shevtsov, V., Frolov, A., Lukashevich I., Malmi, P., Ylinen, E.
& Punkkinen, M.: ESR-NMR studies of the ortho-para conversion in
solid hydrogen, catalyzed by paramagnetic impurities. - International Conference
on Low Temperature Chemistry, September 5þ9, 1994, Moscow, Russia,
Abstracts, pp.34-35.

Vuorimäki, A.H.: Two-pulse echoes of three-spin systems
with no spin temperature in solids. - 12th European Experimental NMR Conf.,
June 5-10, 1994, Oulu, Finland, Abstracts, p.104.

Zogal, O.J., Vuorimäki, A.H., Ylinen, E.E., Idziak, S. &
Niedzwiedz, K.: NMR search for hydrogen diffusion in yterbium dihydride
(YbH_1.95). - International Symposium on Metal- Hydrogen Systems, November
6-11, 1994, Fuji-Yoshida, Japan.

1995: Papers
Lalowicz, Z.T., Serafin, R., Punkkinen, M., Vuorimäki, A.H. &
Ylinen, E.E.: Deuteron NMR Spectra of ND₄ Tunneling at Low Frequencies
in (ND₄)₂SnBr₆. - Z. Naturforsch. 50 a, 373- 380 (1995).

Zogal, O.J., Vuorimäki, A.H., Ylinen, E.E. & Niedzwiedz,
K.: Low temperature ¹H NMR study of electronic structure parameters
(T_1eT) in zirconium dihydride. - Z. Phys. B 96, 293- 295 (1995).

Conference abstracts, reports etc.
Birczynski, A., Lalowicz, Z.T., Olejniczak, Z., Punkkinen, M., Vuorimäki,
A. & Ylinen, E.E.: Proton NMR spectra and relaxation in NH₄ClO₄
at low temperatures. - Quantum Tunnelling of Atoms and Molecules in Solids,
October 4-7, 1995, Chfteau de la Baume, Seyssins, France.

Lalowicz, Z.T., Punkkinen, M., Vuorimäki, A. & Ylinen,
E.E.: Structural Studies by Deuteron NMR Spectroscopy of Tunnelling
and Reorienting ND₄⁺ Ions. - Extended Abstracts of the 12th Specialized
Colloque Ampere on Dynamics of Partially Disordered Condensed Matter, September
10-15, 1995, Corfu, Greece, p.132.

Punkkinen, M.: Anisotropy of the proton spin-lattice relaxation
in NH₄ClO₄ at 6 K. - Quantum Tunnelling of Atoms and Molecules in Solids,
October 4-7, 1995, Chfteau de la Baume, Seyssins, France.

Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: NMR
Echo and Free Induction Signal of ¹⁴N after the Pulse Sequence (θ₁)_x-τ-(θ₂)_y-t.
- Extended Abstracts of the 12th Specialized Colloque Ampere on Dynamics
of Partially Disordered Condensed Matter, September 10-15, 1995, Corfu,
Greece, pp.71-72.

Shevtsov, V., Scherbakov, A., Malmi, P., Ylinen, E. & Punkkinen,
M.: Diffusion of orthomolecules in solid hydrogen. - Preprint IAE 5944/9,
Moscow, 1995.

Vuorimäki, A.H. & Ylinen, E.E.: Ammonium-ion ordering
in ND₄ReO₄ studied by deuteron NMR. - Quantum Tunnelling of Atoms and Molecules
in Solids, October 4-7, 1995, Chfteau de la Baume, Seyssins, France.

1996: Papers
Birczynski, A., Lalowicz, Z.T., Olejniczak, Z. & Punkkinen, M.:
Anisotropy of the proton T₁ and the low-field relaxation in NH₄ClO₄ below
20 K. - Solid State Nuclear Magnetic Resonance 7,105-119 (1996).

Shevtsov, V., Scherbakov, A., Malmi, P., Ylinen, E. & Punkkinen,
M.: Ortho-Para Conversion in Solid Hydrogen Catalyzed by Molecular
Oxygen Impurities. - J. Low Temp. Phys. 104, 211-235 (1996).

Vuorimäki, A.H. & Ylinen, E.E.: Ammonium-ion reorientation
and ordering in ND₄ReO₄ studied by deuteron NMR. - Physica B 225,121-124
(1996).

Conference abstracts, reports etc.
Punkkinen, M., Vuorimäki, A.H. & Ylinen, E.E.: NMR echo
of ¹⁴N in a single crystal of NH₄ClO₄. - Proc. XXX Ann. Conf. Finnish Phys.
Soc., March 21-23, 1996, Espoo, Finland, p.7.33.

1997: Papers
Lalowicz, Z.T., Punkkinen, M., Vuorimäki, A.H., Ylinen, E.E., Detken,
A. & Ingman, L.P.: Spin-lattice relaxation in ammonium compounds
with a complex molecular dynamics. - Solid State Nuclear Magnetic Resonance
8,89-107 (1997).

Tulin, V.A., Vuorimäki, A.H. & Ylinen, E.E.: Domain
structure dynamics in ferromagnetic CrBr₃ studied by nuclear magnetic resonance.
- Journal of Magnetism and Magnetic Materials 174,137-154 (1997).

Ylinen, E.E., Kaikkonen, A. & Punkkinen, M.: Double quantum
coherence of quadrupolar I=1 nuclei: ¹⁴N in NH₄ClO₄. - Solid State Nuclear
Magnetic Resonance 10,25-32 (1997).

Conference abstracts, reports etc.
Kaikkonen, A., Ylinen, E. & Punkkinen, M.: Multiquantum coherences
of quadrupolar nuclei in solids. - XIX National NMR Symposium, June 4-6,
1997, Keuruu, Finland, Abstracts, pp.32-36.

Lalowicz, Z.T., Punkkinen, M., Vuorimäki, A.H. & Ylinen,
E.E.: Ordered ammonium domains in (NH₄)₂PtCl₄ ? - Quantum Atomic and
Molecular Tunnelling in Solids, September 3-6, 1997, Jülich, Germany, Book
of Abstracts, p.39.

Lalowicz, Z.T., Vuorimäki, A.H., Ylinen, E.E. & Punkkinen,
M.: Deuteron NMR spectra of partially deuterated (NH₄)₂SnCl₆. - Quantum
Atomic and Molecular Tunnelling in Solids, September 3-6, 1997, Jülich,
Germany, Book of Abstracts, p.26.

Punkkinen, M., Vuorimäki, A.H., Ylinen, E.E., Lalowicz, Z.T.
& Detken, A.: NH₄ motion in compounds with two T₁ minima. - Quantum
Atomic and Molecular Tunnelling in Solids, September 3-6, 1997, Jülich,
Germany, Book of Abstracts, p.27.

Punkkinen, M., Vuorimäki, A.H., Ylinen, E.E., Ingman, L.P.,
Lalowicz, Z.T. & Detken, A.: Spin-lattice relaxation in the case
of a complex ammonium reorientation in solids. - Proc. XXXI Ann. Conf.
Finnish Phys. Soc., March 13-15, 1997, Helsinki, Finland, p.9.35.

Shevtsov, V., Malmi, P., Ylinen, E. & Punkkinen, M.: The
conversion and diffusion of ortho-H₂ molecules in solid hydrogen. - Second
International Conference on Cryo-crystals and Quantum Crystals, September
7-12, 1997, Polanica-Zdrój, Poland, pap.A-S2.

Shevtsov, V., Malmi, P., Ylinen, E. & Punkkinen, M.: The
conversion and diffusion of ortho-H₂ molecules in solid hydrogen. - Second
International Conference on Cryo-crystals and Quantum Crystals, September
7-12, 1997, Polanica-Zdrój, Poland, pap.P1-1.

Vuorimäki, A.H. & Ylinen, E.E.: Disoder of ammonium
ions in ammonium perrhenate studied by deuteron NMR. - Proc. XXXI Ann.
Conf. Finnish Phys. Soc., March 13-15, 1997, Helsinki, Finland, p.5.15.

1998: Papers
Kaikkonen, A., Ylinen, E.E. & Punkkinen, M.: Five quantum coherence
of I = 5/2 nuclei: ²⁷Al in polycrystalline AlCl₃. - Solid State Nuclear
Magnetic Resonance 10,129-135 (1998).

Kaikkonen, A., Ylinen, E.E. & Punkkinen, M.: Five-Quantum
Coherence of I = 5/2 Nuclei: ²⁷Al in an Al₂O₃ Single Crystal. - Journal
of Magnetic Resonance 133,123-128 (1998).

Punkkinen, M., Vuorimäki, A.H., Ylinen, E.E. & Kaikkonen,
A.: ¹⁴N NMR Echo in NH₄ClO₄ after the Pulse Sequence (θ1)x-τ-(θ2)y-t.
- Journal of Magnetic Resonance 130,287-291 (1998).

Conference abstracts, reports etc.
Kaikkonen, A., Ylinen, E. & Punkkinen, M.: Multiquantum coherences
in trifluoromethyl group. - Extended Abstracts of the Joint 29th AMPERE
- 13th ISMAR International Conference, Berlin, August 2-7, 1998, pp.666-667.

Malmi, P.: Diffusion Studies in Solid Hydrogen. - Ann. Univ.
Turkuensis A I 231, Turku 1998 (Dissertation).

Punkkinen, M., Vuorimäki, A. & Ylinen, E.E.: Spin Diffusion
in Ammonium and Methyl Compounds. - AMPERE VI NMR School, May 31 - June
5, 1998, Zakopane, Poland, Abstracts, pp.37-38.

Shevtsov, V., A., Malmi, P., Ylinen, E. & Punkkinen, M.:
The study of the ortho-para conversion in solid hydrogen, catalyzed by
O₂ impurities, in the temperature range from 4.2 K to 10.9 K. - Preprint
IAE 6106/11, Moscow, 1998.

Zogal, O.J., Vuorimäki, A.H. & Ylinen, E.E.: ²H NMR
in Nearly Stoichiometric Yttrium Dideuteride. - AMPERE VI NMR School, May
31 - June 5, 1998, Zakopane, Poland, Abstracts, pp.41-42.}

|Magnetism and Superconductivity| |NMR & EPR| |Atomic Hydrogen|
|Personnel| |Wihuri homepage| |Physics homepage|

Wihuri Physical Laboratory - Department of Physics
FIN-20014 University of Turku - Finland