Temperature Dependence of Positron Annihilation Rates in Noble Gases.
Temperature Dependence of Positron Annihilation Rates in Noble Gases.
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DOI：
10.1103/physrevlett.77.2929
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发表时间：
1996-09
影响因子：
8.6
通讯作者：
C. Kurz;R. G. Greaves;C. Surko
中科院分区：
文献类型：
--
作者：
C. Kurz;R. G. Greaves;C. Surko
已经测量了惰性气体的正电子湮灭率对温度的依赖性。这些测量是使用新技术进行的，该技术首次使正电子能量范围在 kBT > 0.025 和 1 eV 之间可供实验使用。潘宁陷阱中的正电子被加热到约 1 eV，然后通过碰撞冷却到室温，同时保持麦克斯韦速度分布。在冷却过程中测量正电子湮灭率。实验数据与理论计算吻合良好。 [S0031-9007(96)01323-3]
The dependence of positron annihilation rates on temperature has been measured for the noble gases. These measurements were carried out using a new technique which, for the first time, makes the positron energy range between kBT › 0.025 and 1 eV accessible to experiments. Positrons in a Penning trap are heated to about 1 eV, and then cool to room temperature by collisions while maintaining a Maxwellian velocity distribution. The positron annihilation rate is measured during the cooling. Experimental data are in good agreement with theoretical calculations. [S0031-9007(96)01323-3]