DOUBLE PHOTOIONIZATION OF EXCITED S-1 AND S-3 STATES OF THE HELIUM ISOELECTRONIC SEQUENCE

被引：77

作者：

FORREY, RC ^{[1
]}

SADEGHPOUR, HR ^{[1
]}

BAKER, JD ^{[1
]}

MORGAN, JD ^{[1
]}

DALGARNO, A ^{[1
]}

机构：

[1] UNIV DELAWARE, DEPT PHYS & ASTRON, NEWARK, DE 19716 USA

来源：

PHYSICAL REVIEW A | 1995年 / 51卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.51.2112

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present results for the photoionization of ground and excited S states of two-electron systems by x-ray photons. The method uses the asymptotic formulation of Dalgarno and Stewart [Proc. Phys. Soc. London 76, 49 (1960)] with highly correlated Frankowski-Pekeris-type wave functions for N S1 and N S3 initial states. The calculations show a smaller ratio of double-to-single photoionization R for triplet states due to the spatial antisymmetry of the wave function near the nucleus. We find an asymmetric population of photoion satellite states and provide expressions for the asymptotic single and total photoionization, and R as a function of nuclear charge. We also make predictions for the differential double photoionization cross sections in the extreme energy sharing case when one electron is ejected with zero energy. © 1995 The American Physical Society.

引用

页码：2112 / 2116

页数：5

共 25 条

[1] EXCITATION IONIZATION AND DOUBLE-IONIZATION OF HELIUM BY HIGH-ENERGY PHOTON IMPACT [J].

ANDERSSON, LR ;

BURGDORFER, J .

PHYSICAL REVIEW LETTERS, 1993, 71 (01) :50-53

[2]

AZUMA Y, IN PRESS PHYS REV A

[3] ELECTRON CORRELATIONS IN ATOMIC SHELLS - SYSTEMATICS OF HIGH-ANGULAR-MOMENTUM ADMIXTURES [J].

CAVAGNERO, M .

PHYSICAL REVIEW A, 1984, 30 (03) :1169-1174

[4] DOUBLE PHOTOIONIZATION OF ATOMIC HELIUM AND ITS ISOELECTRONIC PARTNERS AT X-RAY-ENERGIES [J].

DALGARNO, A ;

SADEGHPOUR, HR .

PHYSICAL REVIEW A, 1992, 46 (07) :R3591-R3993

[5] SUM RULES FOR OSCILLATOR STRENGTHS OF H- [J].

DALGARNO, A ;

EWART, RW .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1962, 80 (515) :616-&

[6] THE LAMB SHIFT OF HELIUM [J].

DALGARNO, A ;

STEWART, AL .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1960, 76 (487) :49-55

[7]

DRAKE GWF, 1993, ADV ATOM MOL OPT PHY, V31, P1

[8] PHOTOEXCITATION AND IONIZATION IN HELIUM - ZERO-KINETIC-ENERGY SPECTROSCOPY [J].

FAN, Z ;

SADEGHPOUR, HR ;

DALGARNO, A .

PHYSICAL REVIEW A, 1994, 50 (04) :3174-3180

[9]

Fock V., 1958, KGL NORSKE VIDENSKAB, V31, P138

[10] LOGARITHMIC TERMS IN WAVE FUNCTIONS OF 21S AND 23S STATES OF 2-ELECTRON ATOMS [J].

FRANKOWS.K .

PHYSICAL REVIEW, 1967, 160 (01) :1-&

← 1 2 3 →