Shabanova E, Schaumburg K, Sellschop JPF
CISMI, University of Copenhagen, Symbion Science Park, Fruebjergvej 3, Copenhagen, DK-2100, Denmark
J Magn Reson. 1998 Jan;130(1):8-17. doi: 10.1006/jmre.1997.1283.
The paper is devoted to investigations of spin-lattice relaxation processes in 99% 13C-enriched diamonds. Relaxation time measurements were performed as a function of orientation, magnetic field, and temperature. Both experimental results and theoretical discussion are presented. Multiexponential behavior of nuclear magnetization recovery was observed. There was found no significant influence of the diamond orientation on the nuclear spin-lattice relaxation. The field dependence of the spin-lattice relaxation time was found to be proportional to the second power of the magnetic field. The temperature measurements showed a weak increase of the spin-lattice relaxation time with decreasing temperature. Possible mechanisms of impurity relaxation are considered and compared with the experimental data. Copyright 1998 Academic Press. Copyright 1998 Academic Press
本文致力于研究99% 13C富集金刚石中的自旋-晶格弛豫过程。弛豫时间测量是作为取向、磁场和温度的函数进行的。同时给出了实验结果和理论讨论。观察到核磁化恢复的多指数行为。发现金刚石取向对核自旋-晶格弛豫没有显著影响。自旋-晶格弛豫时间的场依赖性被发现与磁场的二次方成正比。温度测量表明，随着温度降低，自旋-晶格弛豫时间略有增加。考虑了杂质弛豫的可能机制并与实验数据进行了比较。版权所有1998年学术出版社。版权所有1998年学术出版社
