4D-SHELL PHOTOIONIZATION OF XE, CS, BA, SM, EU AND YB ATOMS STUDIED BY PHOTOION-YIELD SPECTRA

被引：31

作者：

NAGATA, T ^{[1
]}

YOSHINO, M ^{[1
]}

HAYAISHI, T ^{[1
]}

ITIKAWA, Y ^{[1
]}

ITOH, Y ^{[1
]}

KOIZUMI, T ^{[1
]}

MATSUO, T ^{[1
]}

SATO, Y ^{[1
]}

SHIGEMASA, E ^{[1
]}

TAKIZAWA, Y ^{[1
]}

YAGISHITA, A ^{[1
]}

机构：

[1] NATL LAB HIGH ENERGY PHYS,PHOTON FACTORY,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA SCRIPTA | 1990年 / 41卷 / 01期

关键词：

D O I：

10.1088/0031-8949/41/1/012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A comparative study of multiple photoionization in the 4d ionization region (78-270eV) of M = Xe, Cs, Ba, Sm, Eu and Yb atoms is reported. Partial photion-yield spectra for Mn+ (n = 1-4) ions have been measured by using synchrotron radiation as a light source. Main products in Xe, Cs and Ba are Mn2+ and M3+ ions due to the creation of a 4d vacancy. In Sm and Eu, a large fraction of M+ ions are populated via the 4d-4f resonant excitation and subsequent autoionization to the 4f ionization continuum, which is squeezing the population of multiply-charged ions to about 50%. In Yb, a large amount of M+ ions are also populated, but are due largely to the direct 4f ionization. In all of the atoms studied, an appreciable or considerable amount of M4+ ions are observed, indicating the existence of photoelectron and/or Auger shake-off processes. © 1990 IOP Publishing Ltd.

引用

页码：47 / 50

页数：4

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