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she pin si ji zuo yue shu de li zi gao fen bian gao ling min guang pu xue
Author(s): 
Pages: 480
Year: Issue:  Z1
Journal: Chinese Journal of Lasers

Keyword:  缓冲气体束离子同位素空间电荷限制高分辨光谱射频超精细跃迁光谱分辨率贮存技术粒子密度;
Abstract: <正> 离子贮存技术已被成功地用于高分辨光谱。同时,它已发展为最灵敏的技术之一。这是因为存贮着的粒子密度受空间电荷限制而小于105离子/厘米3。为了用光谱办法测量低丰度元素或同位素,并扩展精度范围,我们试图改进光谱分辨率和灵敏度。在超高真空条件下,或者用氢、氦这一类轻缓冲气体的情况下,我们在阱深40eV,直径4cm的射频四极子阱里约束离子达几小时以上。在激光-微波光学双共振实验中,基态超精细态的相干时间大于20秒。实验中实际达到的最狭线宽,对于171Yb+的12GHz超精细跃迁,是33MHz(FWHM)。
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