Antihydrogen level population evolution: impact of positron plasma length

Antihydrogen level population evolution: impact of positron plasma length
复制标题

反氢能级群体演化:正电子等离子体长度的影响

DOI:
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
Y. Yamazaki
Y. Yamazaki
中科院分区:
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文献类型:
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作者:
B. Radics;Y. Yamazaki

文献摘要

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反氢是由反质子和正电子等离子体在低温电磁阱中混合产生的。主要的反氢形成机制是三体复合,而随后的水平人口演变是由各种过程,主要是碰撞(去)激发,电离和辐射衰变。在这项工作中的影响,不同的正电子等离子体长度的水平人口演变的影响进行了研究。主要的兴趣是基态反氢原子产额。结果表明,在较短和较长的正电子等离子体长度下,基态能级布居呈现不同的幂律行为。
Antihydrogen is produced by mixing an antiproton and a positron plasma in a cryogenic electromagnetic trap. The dominant antihydrogen formation mechanism is three-body recombination, while the subsequent level population evolution is governed by various processes, mainly collisional (de)excitation, ionisation and radiative decay. In this work the impact of various positron plasma lengths on the level population evolution is investigated. The main interest is the ground-state antihydrogen atom yield. It is found that the ground state level population shows different power-law behaviors at short or longer positron plasma lengths.