Near threshold photodetachment cross section of negative atomic oxygen ions
Wu Jian-Hua (吴建华)a, Yuan Jian-Min (袁建民)a, Vo Ky Lanb
a Department of Applied Physics, National University of Defense Technology, Changsha 410073, China; b Observatoire de Paris, Meudon, 92195 Meudon, France
Abstract A 40-target state close-coupling calculation for the photodetachment cross section of negative atomic oxygen near threshold is carried out with core－valence electron correlation by using the R-matrix method. It was shown that after considering the excitations of two electrons from the 2s shell, the electron affinity of O$^-$ (2s$^2$2p$^5$ $^2$P°) agrees with the experimental result much better than that just considering the excitations of electrons only from the 2p shell as well as only one electron from the 2s shell. Total cross section as well as the main contribution of the ionization channels to the partial cross section are illustrated to show the structure near threshold clearly.
Received: 03 May 2003
Revised: 30 June 2003
Accepted manuscript online:
Fund: Project supported by the National Science Fund for Distinguished Young Scholars (Grant No 10025416), the National Natural Science Foundation of China (Grant No 19974075), the National High-Tech ICF Committee in China, and China Research Association of Atomic and Molecular Data.
Cite this article:
Wu Jian-Hua (吴建华), Yuan Jian-Min (袁建民), Vo Ky Lan Near threshold photodetachment cross section of negative atomic oxygen ions 2003 Chinese Physics 12 1390
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