The possibility of studying thermal motion correlation by multiple pulse NMR
Tóm tắt
We present the results of a calculation of the spin-lattice and spin-spin relaxation for dipolar solid when it is irradiated by the WAHUHA and MREV-8 pulse sequences. The spin-spin relaxation rate which is determined by the second-order dipolar interaction term of the average Hamiltonian depends on thermal motion of four atoms. It has been shown that from the temperature dependence of this relaxation rate the degree of correlated atomic motion can be estimated.
Tài liệu tham khảo
DYBOWSKI, C. and PEMBLETON, R.G.: J.Chem. Phys. 70, 1962 (1279)
GRÜNDER, W.: Wiss. Z. Karl-Marx-Univ. Leipzig Math.-Naturwiss 23, 466 (1974)
HAEBERLEN, U. and WAUGH, J.S.: Phys. Rev. 185, 420 (1969)
HAEBERLEN, U.: High Resolution MR in Solids. Selective Averaging, New York, San Francisco, London: Academic Press 1976
IVANOV, Yu.N., PROVOTOROV, B.N. and FELDMAN, E.B.:Zh. Eksper. Teor. Fiz. 75, 1847 (1978)
LIPPMAA, E., ALLA, M. and TUHERM, T. in“Proceedings of the XIX Congress Ampere”, Groupement Ampere, Heidelberg/Geneva 1977, p. 113
VEGA, A.J. and VAUGHAN, R.W.: J. Chem. Phys. 68, 1958 (1978)
ZOBOV,V.E. and PONOMARENKO, A.V. in “Yadernyi Magnitnyi Rezonans v Kristallach”, Lundin, A.G., Editor, Krasnoyarsk 1978, P. 3
ZOBOV, V.E.: Fiz. Tverd. Tela 21, 2447 (1979)
ZOBOV, V.E. and PONOMARENKO, A.V. in “Radiospectroskopiya Tverdogo Tela”, Lundin, A.G., Editor, Krasnoyarsk 1979, p. 70