Observation of electron capture into continuum states of neutral atoms.
Observation of electron capture into continuum states of neutral atoms.
复制标题
观察电子捕获到中性原子的连续态。
作者：
Sarkadi;Pálinkáš;Kövér;Berényi;Vajnai
75-keV/amu He/sup 0/-He,Ar 碰撞向前喷射的电子能谱与电荷状态选择的出射射弹 He/sup 0/、He/sup +/ 和 He/sup 2+/ 一致进行了测量。电子能谱中尖峰形峰的出现与 He/sup 0/ 一致，给出了第一个明确的实验证据，表明电子捕获到连续态 (ECC) 发生在弹丸是中性原子的碰撞中。 He/sup 0/ 冲击的 ECC 的特征是尖峰宽度比 He/sup +/ 冲击小得多。
Energy spectra of electrons ejected in the forward direction from 75-keV/amu He/sup 0/-He,Ar collisions have been measured in coincidence with the charge-state--selected outgoing projectiles He/sup 0/, He/sup +/, and He/sup 2+/. The appearance of the cusp-shaped peak in the electron spectrum in coincidence with He/sup 0/ gives the first clear experimental evidence that electron capture into the continuum states (ECC) occurs in collisions where the projectile is a neutral atom. The ECC for He/sup 0/ impact is characterized by a considerably smaller width of the cusp peak than for He/sup +/ impact.