Excitation of positronium: from the ground state to Rydberg levels
Excitation of positronium: from the ground state to Rydberg levels
复制标题
正电子素的激发:从基态到里德伯能级
DOI:
10.1088/1361-6455/aa9aa2
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Baker C
中科院分区:
文献类型:
--
作者:
Baker C
Following bombardment of a mesoporous silica sample by positrons ejected from a two-stage buffer gas trap, ortho-positronium (o-Ps) was emitted into vacuum with an efficiency of around 27%–28%. This ensemble, with a density close to 10 11 m− 3, was then irradiated by multiple solid state-based laser beams up to 50 ns after positron implantation. Tunable over a wide range (230–2200 nm), the lasers have enabled excitation of the o-Ps Lyman-α transition, followed by subsequent excitation and, if desired, ionisation to vacuum. Excitation from the 2P state to intermediate states in the principal quantum number,
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影响因子:
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