激光极化^(129)Xe核自旋弛豫率的测量

MEASUREMENT OF THE NUCLEAR SPIN RELAXATION RATE OF THE LASER-POLARIZED ^(129)Xe GAS

由弱磁场下光泵自旋交换、强磁场中核磁共振测量方法 ,获得激光极化低压同位素1 2 9Xe气体的核自旋弛豫率 1 /T1 及其与N2 气压力、环境温度的关系 .结果表明 :在 2 91K的室温下 ,对于 0～ 1 1 333.0 5Pa的N2 气压力范围 ,1 /T1 随着N2 气压力的增加而增大 ;N2 气压力为 1 466.63Pa时 ,1 /T1 随着样品温度从 2 34K到 2

The nuclear spin relaxation rate 1/T\-1 of the laser-polarized \+\{129\} Xe produced in a low magnetic field was measured in a high magnetic field. The relations between the 1/T\-1 and the pressure of N\-2 or the temperature were obtained. The r esults s how that the 1/T\-1 increases as the pressure of N\-2 varies from 0 to 11333 .05Pa when the temperature was kept in 291K, and that the 1/T\-1 d ecreases as the temperature varies from 234K to 292K when the pressure of N\-2 was 1466.63Pa,