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Measurement of photoionization cross sections of the excited states of titanium, cobalt, and nickel

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8 Author(s)
Cong, Ran ; Institute of Atomic and Molecular Physics, Anhui Normal University, Wuhu, Anhui 241000, China ; Cheng, Yi ; Yang, Jiajun ; Fan, Jianmei
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Resonance-enhanced multiphoton ionization (REMPI) of Ti, Co, and Ni atoms has been investigated in the 285–320 nm region. We couple a laser-ablated metal target into a molecular beam to produce atoms. Ions produced from photoionization of the neutral atoms are monitored by a home-built time-of-flight mass spectrometer. Photoionization cross sections of the excited states of Ti, Co, and Ni were deduced from the dependence of the ion signal intensity on the laser intensity for photon energies close to the ionization threshold. The values obtained range from 0.2 to 6.0 Mb. No significant isotope dependence was found from measurements of the photoionization cross sections of 46Ti, 47Ti, 48Ti, 58Ni, and 60Ni.

Published in:

Journal of Applied Physics  (Volume:106 ,  Issue: 1 )

Date of Publication:

Jul 2009

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