中国物理B ›› 2001, Vol. 10 ›› Issue (11): 1017-1020.doi: 10.1088/1009-1963/10/11/305

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

DETERMINATION OF THE LIFETIME OF THE 4p1P0 STATE OF CALCIUM BY ELECTRON PHOTON COINCIDENCE

M.A.K.Elfayoumi   

  1. Department of Physics, Beni-suef Faculty of Science, Cairo University, Egypt
  • 收稿日期:2001-02-22 修回日期:2001-06-17 出版日期:2005-06-12 发布日期:2005-06-12

DETERMINATION OF THE LIFETIME OF THE 4p1P0 STATE OF CALCIUM BY ELECTRON PHOTON COINCIDENCE

M.A.K.Elfayoumi   

  1. Department of Physics, Beni-suef Faculty of Science, Cairo University, Egypt
  • Received:2001-02-22 Revised:2001-06-17 Online:2005-06-12 Published:2005-06-12

摘要: The electron-photon delayed coincidence technique has been used to measure precisely the lifetime for the 4p1P0 state in calcium. The lifetime of this state was obtained by measuring the time correlation spectrum between the inelastically scattered electrons and the corresponding de-excitation photons. By using the least-squares fitting program to fit Gale's equation to the data points, a value of (4.15±0.17) ns was obtained. The result was compared to some of the earlier experimental measurements.

Abstract: The electron-photon delayed coincidence technique has been used to measure precisely the lifetime for the 4p1P0 state in calcium. The lifetime of this state was obtained by measuring the time correlation spectrum between the inelastically scattered electrons and the corresponding de-excitation photons. By using the least-squares fitting program to fit Gale's equation to the data points, a value of (4.15±0.17) ns was obtained. The result was compared to some of the earlier experimental measurements.

Key words: electron-atom collision

中图分类号:  (Oscillator strengths, lifetimes, transition moments)

  • 32.70.Cs
32.80.-t (Photoionization and excitation) 34.80.Dp (Atomic excitation and ionization)