Pressure dependence of the negative ion effective mass in He II.
Pressure dependence of the negative ion effective mass in He II.
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He II 中负离子有效质量的压力依赖性。
DOI：
10.1088/0022-3719/16/15/001
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
R. Bowley
中科院分区：
文献类型：
--
作者：
T. Ellis;P. McClintock;R. Bowley
首次研究了He II负离子有效质量m* 的压力依赖性。在这种自由粒子状离子色散关系的假设下，从测量中推导出的m* 值范围从11 bar时的108 m4到25 bar时的77 m4，其中m4是4He原子质量。然而，在原始数据中有迹象表明，在色散关系中可能有一个小的四次项。如果在这样一个额外项确实存在的假设下重新分析数据，则导出的m* 值减少约8%，这使它们与负离子气泡模型的预测非常一致。
The pressure dependence of the effective mass m* of the negative ion in He II has been investigated for the first time. On this assumption of a free-particle-like ionic dispersion relation, the values of m* deduced from the measurements range from 108 m4 at 11 bar to 77 m4 at 25 bar, where m4 is the 4He atomic mass. There are indications in the raw data, however, that there may be a small quartic term in the dispersion relation. If the data are re-analysed on the assumption that such an extra term does exist, the derived values of m* are reduced by about 8%, which then brings them into excellent agreement with the predictions of the bubble model of the negative ion.