Accurate electron affinity of Co and fine-structure splittings of Co- via slow-electron velocity-map imaging

作者：Chen, Xiaolin; Ning, Chuangang^*

来源：Physical Review A, 2016, 93(5): 052508.

DOI：10.1103/PhysRevA.93.052508

• LASER PHOTOELECTRON SPECTROMETRY
• HIGH-RESOLUTION PHOTODETACHMENT
• BINDING-ENERGIES
• NEGATIVE-IONS
• SPECTROSCOPY
• AUTODETACHMENT
• STATES
• IRON

The high-resolution photoelectron spectra of Co- were obtained via the slow-electron velocity-map imaging method. The electron affinity of cobalt element was determined to be 5341.45(37) cm(-1) or 662.256(46) meV. The fine structure of Co- was well resolved. The fine-structure intervals Co-(F-3(4)) - Co-(F-3(3)) and Co-(F-3(4)) - Co-(F-3(2)) were found to be 920.9(6) cm(-1) and 1550.3(9) cm(-1), respectively. The accuracy was improved by a factor of more than ten with respect to the previous laser photodetachment threshold measurement.

• 出版日期2016-5-12
• 单位低维量子物理国家重点实验室; 清华大学