The Isomer Shift in 119Sn and the Quadrupole Moment of the First Excited State
The Isomer Shift in 119Sn and the Quadrupole Moment of the First Excited State
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119Sn的异构体位移和第一激发态的四极矩
DOI：
10.1088/0370-1328/79/2/323
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发表时间：
1962
影响因子：
--
通讯作者：
C. Edwards
中科院分区：
文献类型：
--
作者：
A. Boyle;D. Bunbury;C. Edwards
本文用穆斯堡尔效应测量了几种锡化合物中~（119）Sn第一激发态的核四极矩分裂，并对基态跃迁的同质异能素位移进行了比较。同质异能素位移的解释方面的变化所产生的主要从零点振动运动的核的均方变形。激发态和基态之间的差值为+6 × 10-4。根据对119 Sn核的场梯度的估计，3/2+态的四极矩约为-8 × 10-26cm ~2。使用耦合到振动器的单个粒子的模型来计算两个测量量的值。为了与实验结果相一致，必须考虑核力的配对关联。
By means of the Mossbauer effect, the nuclear quadrupole splitting of the first excited state of 119Sn has been measured in several tin compounds and a comparison made of the isomer shifts of the ground state transition. The isomer shift is interpreted in terms of a change in the mean square deformation of the nucleus arising mainly from the zero-point vibrational motion. The difference in between the excited and ground states is found to be +6 × 10-4. From estimates of the field gradient at the 119Sn nucleus a value of approximately-8 × 10-26 cm2 has been assigned to the quadrupole moment of the 3/2+ state. Values of the two measured quantities are calculated using a model of a single particle coupled to a vibrator. The inclusion of pairing correlations of the nuclear force is necessary to obtain agreement with the experimental results.