Browsing by Author "Kuang, JY"

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Comprehensive convergence study of TCAO close-coupling method for the excitation and ionization in keV H+-H collisions
(1996-11-28)
Kuang, JY
;
Lin, CD
;
物理研究所
;
Institute of Physics
Convergence of the two-centre atomic orbital (TCAO) close-coupling calculations for the excitation and ionization of atomic hydrogen by keV proton impact is carefully examined using various large basis sets on each centre; It is shown that reliable cross sections for the weak channels can only be obtained with a large number of basis states on the target and a limited number of bound states on the projectile. Cross sections for excitation to 2l, 3l, 4l and 5l states and for ionization are presented and compared to available experimental data and to other theoretical calculations.
Comprehensive convergence study of TCAO close-coupling method for the excitation and ionization in keV H+-H collisions
(1996-11-28)
Kuang, JY
;
Lin, CD
;
物理研究所
;
Institute of Physics
Convergence of the two-centre atomic orbital (TCAO) close-coupling calculations for the excitation and ionization of atomic hydrogen by keV proton impact is carefully examined using various large basis sets on each centre; It is shown that reliable cross sections for the weak channels can only be obtained with a large number of basis states on the target and a limited number of bound states on the projectile. Cross sections for excitation to 2l, 3l, 4l and 5l states and for ionization are presented and compared to available experimental data and to other theoretical calculations.
Convergent TCAO close-coupling calculations for electron transfer, excitation and ionization in intermediate keV He2+-H collisions
(1997-01-14)
Kuang, JY
;
Lin, CD
;
物理研究所
;
Institute of Physics
Our recently developed two-centre atomic orbital (TCAO) close-coupling method is applied to He2+-H(1s) collisions in the impact energy range from 20-400 keV amu(-1). Convergent cross sections are obtained for this system by using a large number of bound and pseudostate basis functions on the target and a limited number of bound states on the projectile. Cross sections for electron transfer to 1s, 2l, 3l, 4l and 5l, for excitation to 2l, 3l, 4l and 5l and for ionization are presented and compared with available experimental data and other theoretical calculations. The accuracy of the previous TCAO close-coupling calculations is challenged and the reliability of some experimental data for this system is questioned.
Electron detachment of H- in collision with Ne4+ and Ar4+ ions
(1997-09-01)
Lin, JT
;
Jiang, TF
;
Kuang, JY
;
Lin, CD
;
電子物理學系
Total-electron detachment cross sections for H- colliding with multiply charged Ne4+ and Ar4+ ions are calculated using the two-center atomic-orbital close-coupling expansion method in the center-of-mass energy range of 4-200 keV. The calculation shows that there is no core effect, and that electron capture only plays a minor role for energies above 20 keV. At 50 keV, where electron capture is not important, the single-center atomic-orbital expansion method was used to calculate the detachment cross sections for incident charges q=1-8. The present calculations are shown to be in good agreement with experimental data.