FORMATION OF FESHBACH RESONANCES ASSOCIATED WITH DOUBLY EXCITED HE STATES IN SLOW COLLISIONS OF HE++ IONS WITH LOW WORK FUNCTION SURFACES

被引：13

作者：

BRENTEN, H

MULLER, H

KEMPTER, V

机构：

[1] Physikalisches Institut der Technischen Universität Clausthal

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.70.25

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report electron energy spectra from He++ (100 eV) ions colliding under grazing incidence with partially cesiated W(110). We propose that at low surface work functions (less-than-or-equal-to 2 eV) the formation of Feshbach resonances associated with the doubly excited He states of the configurations (2l2l') occurs. This is concluded from the variation of the relative population of the doubly excited He states with the surface work function. Furthermore, a peak can be identified in the spectra which appears to be due to the decay of the Feshbach resonances by one-electron emission.

引用

页码：25 / 28

页数：4

共 12 条

[1]

BORISOV AG, IN PRESS SURF SCI

[2] INTRA-ATOMIC AND INTER-ATOMIC AUGER PROCESSES IN COLLISIONS OF LOW-ENERGY HE++, HE+, HE-STAR (23 S,21 S) AND LI+ WITH LI COVERED W(110) SURFACES [J].