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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Considerations towards the possibility of the observation of parity nonconservation in highly charged ions in storage rings
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Considerations towards the possibility of the observation of parity nonconservation in highly charged ions in storage rings

机译：考虑到在储存环中高度电荷的离子中观察奇偶阶层非经济性的可能性

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The feasibility of an experiment for the observation of parity nonconserving effects using He-like highly charged ions in storage rings is discussed theoretically. The basic idea is the observation of an asymmetry in the emission of the hyperfine quenched transition (1s2s)S-1(0) - (1s)(2) S-1(0) + gamma with respect to the direction of a beam of ions with polarized nuclei. It will be shown, that for such an experiment Eu-151(61+) ions with nuclear spin I = 5/2 in the excited electronic state (1s2s)S-1(0) with zero total electron angular momentum and polarized nuclei are the best available candidates. The nuclei can be polarized if H-like Eu62+ ions capture an electron from a polarized electron beam which overlays the ion beam on some part of the ring and travels with nearly the same velocity. It is suggested, to monitor steadily the degree of the nuclear polarization by the observation of the selective laser excitation and subsequent decay of the Zeeman sublevels of the excited hyperfine states of the ionic ground state. Estimates for the observation time aiming at an accuracy of PNC measurement of about 0.1% are given.
机译：本文从理论上讨论了在储存环中用类氦高电荷离子观察宇称非服务效应实验的可行性。其基本思想是观察超精细猝灭跃迁（1s2s）S-1（0）；（1s）（2）S-1（0）+γ，关于带极化核的离子束的方向。结果表明，对于这样一个实验，在激发电子态（1s2s）S-1（0）下，核自旋I=5/2、总电子角动量为零的Eu-151（61+）离子和极化核是最好的候选离子。如果类氢Eu62+离子从极化电子束中捕获一个电子，该电子束覆盖在环的某个部分，并以几乎相同的速度移动，则原子核可以极化。建议通过观察选择性激光激发和离子基态激发超精细态塞曼子能级的衰减，稳定地监测核极化程度。给出了以PNC测量精度约为0.1%为目标的观测时间估计。

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