DETERMINATION OF THE QUADRUPOLE COUPLING FROM FEATURELESS LINE-SHAPES

被引：5

作者：

HEPP, MA

MAN, PP

TROKINER, A

FRAISSARD, J

机构：

[1] UNIV PARIS 06,CHIM SURFACES LAB,CNRS,URA 1428,F-75252 PARIS,FRANCE

[2] ESPCI,PHYS THERM GRP,PMMH LAB,CNRS,URA 857,F-75005 PARIS,FRANCE

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 1994年 / 32卷 / 01期

关键词：

SOLID-STATE; RB-87; NMR; QUADRUPOLE FREQUENCY; FEATURELESS LINESHAPES; RBCAF3; POINT DEFECTS;

D O I：

10.1002/mrc.1260320106

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

NMR nutation and quadrupole echo experiments were used to determine the quadrupole frequency (omega(Q)) of Rb-87 (I = 3/2) in a single crystal of RbCaF3. Since RbCaF3 has a cubic unit cell above 195 K, there is no second-order quadrupole shift and the spectrum is rather featureless. By fitting the response of Rb-87, as a function of pulse duration, to the predicted response we were able to determine that the average omega(Q)/2 pi = 4.5 kHz in this sample. Discrepancies in the agreement between the theory and the experiment for the echo response were attributed to differential relaxation of the central and satellite transitions.

引用

页码：24 / 28

页数：5

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