Open AccessPhotoionization cross section measurements of the excited states of cobalt in the near-threshold region
Author(s) -
Xianfeng Zheng,
X. K. Zhou,
Zaiqi Cheng,
Dandan Jia,
Zehua Qu,
Yao G,
Xianyi Zhang,
Zhifeng Cui
Publication year - 2014
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4898326
Subject(s) - photoionization , atomic physics , excited state , ionization , photoionization mode , mass spectrometry , cobalt , chemistry , resonance (particle physics) , resonance enhanced multiphoton ionization , physics , ion , inorganic chemistry , organic chemistry , chromatography
We present measurements of photoionization cross-sections of the excited states of cobalt using a two-color, two-step resonance ionization technique in conjunction with a molecular beam time of flight (TOF) mass spectrometer. The atoms were produced by the laser vaporization of a cobalt rod, coupled with a supersonic gas jet. The absolute photoionization cross-sections at threshold and near-threshold regions (0-1.2 eV) were measured, and the measured values ranged from 4.2±0.7 Mb to 10.5±1.8 Mb. The lifetimes of four odd parity energy levels are reported for the first time