DOUBLE EXCITATION OF HE BY FAST IONS

被引：83

作者：

GIESE, JP ^{[1
]}

SCHULZ, M ^{[1
]}

SWENSON, JK ^{[1
]}

SCHONE, H ^{[1
]}

BENHENNI, M ^{[1
]}

VARGHESE, SL ^{[1
]}

VANE, CR ^{[1
]}

DITTNER, PF ^{[1
]}

SHAFROTH, SM ^{[1
]}

DATZ, S ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA

来源：

PHYSICAL REVIEW A | 1990年 / 42卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.42.1231

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Autoionization of He atoms following double excitation by electrons, protons, CQ+ (Q=46), and FQ+ (Q=79) ions has been studied. The electron-emission yields from the doubly excited 2s2(1S), 2s2p(1P), and 2p2(1P) states were measured at the reduced projectile energy of 1.5 MeV/nucleon for observation angles between 10°and 60°. The results indicate excitation to the 2s2(1S) and 2p2(1D) states increases as approximately Q3, while excitation to the 2s2p(1P) state varies as approximately Q2, where Q is the charge of the projectile. These charge dependences are significantly less than the Q4 dependence expected in the independent-electron model, suggesting the interaction between the two target electrons is important in creating the doubly excited states. © 1990 The American Physical Society.

引用

页码：1231 / 1244

页数：14

共 45 条

[1] MULTIPLE IONIZATION OF HE, NE, AND AR BY FAST PROTONS AND ANTIPROTONS [J].