Report No xxxx - Instytut Fizyki JÄ drowej PAN

NMR MULTIPOLE RELAXATION
IN THE ROTATING FRAME
IN GASES
Jerzy S. Blicharski, Barbara Blicharska
M. Smoluchowski Institute of Physics, Jagellonian University, Kraków, Poland
We consider NMR multipole relaxation for a system of two identical nuclear
quadrupole spins I 1 = I 2 = 7, with a total spin I = I 1 + I 2 in gaseous state, in the presence of
electric quadrupole and magnetic dipole - dipole interactions in a rotating tilted frame. The
multipole relaxation times T LMρ are calculated for a maximal multipole order L = L max = 2I
= 28 and M-quantum coherences, with M = 28 and 0, in a weak collision approximation
[1-3], as a function of temperature, frequency and the tilt angle β between the external
magnetic field B o and effective field B e in the rotating frame. These calculations are also
extended for two spin systems of 176 Lu 2 O 3 in a liquid and solid state. The multipole
relaxation times in the rotating frame are compared with relaxation times for dipolar orders
[4-9] and they may be used for investigations of slow molecular motions in gases, liquids
and solids.
REFERENCES:
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Resonance in One and Two Dimensions, Clarendon Press, Oxford, 1987.
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[3] J. S. Blicharski, D. Kruk, Appl. Magn. Reson. 17, 367 (1999).
[4] J. S. Blicharski, Report No 1885/AP, 12, INP, Cracow, 2001.
[5] J. S. Blicharski, Proc. XXXI Comgress AMPERE, Poznań, 10 (2002).
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[7] J.S. Blicharski, Z.Naturforsch. 27A, 1359 (1972), ibid. 27A, 1456 (1972).
[8] J. S. Blicharski, Proc. XXVI Congress AMPERE, Athens, 203 (1992).
Proc.AMPERE Summer School, Nafplion, 78 (2000).
[9 ] K. Kuwata, T. Schleich, J. Magn. Reson. A111, 43 (1994).
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