Resonant ionization spectroscopy of autoionizing Rydberg states in cobalt and redetermination of its ionization potential

被引：3

作者：

Liu, Y. ^{[1
]}

Gottwald, T. ^{[2
]}

Mattolat, C. ^{[2
]}

Wendt, K. ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[2] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 D- Mainz, Germany

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2017年 / 50卷 / 07期

关键词：

resonant ionization; cobalt; Ti:sapphire laser; laser ion source; Rydberg state; autoionizing; LASER ION-SOURCE; ATOMIC-ENERGY LEVELS; HYPERFINE-STRUCTURE; MASS-SPECTROMETRY; VOIGT FUNCTION; TERM ANALYSIS; IRON-PERIOD; BETA-DECAY; CO; APPROXIMATION;

D O I：

10.1088/1361-6455/aa58d0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Multi-step resonance ionization spectroscopy of cobalt has been performed using a hot-cavity laser ion source and three Ti:Sapphire lasers. The photoionization spectra revealed members of five new autoionizing Rydberg series that originate from three different lower levels of 3d(7)4s5s h(4)F(9/2), 3d(7)4s4d f(4)G(11/2), and 3d(7)4s4d f(4)H(13/2) and converge to the first four excited states of singly ionized Co. The analyses of the Rydberg series yield 63 564.689 +/- 0.036 cm(-1) as the first ionization potential of Co, which is an order of magnitude more accurate than the previous estimation. Using a three-step resonance ionization scheme that employs an autoinizing Rydberg state in the last transition, we obtained an overall ionization efficiency of about 18% for Co.

引用

页数：10

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