Double photoionization of excited 1S and 3S states of the helium isoelectronic sequence

R. C. Forrey, H. R. Sadeghpour, J. D. Baker, J. D. Morgan, A. Dalgarno

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2112-2116
Number of pages5
JournalPhysical Review A
Volume51
Issue number3
DOIs
StatePublished - Jan 1 1995

Fingerprint

isoelectronic sequence
photoionization
helium
wave functions
antisymmetry
atomic energy levels
electrons
formulations
nuclei
energy
cross sections
photons
predictions
x rays

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Forrey, R. C. ; Sadeghpour, H. R. ; Baker, J. D. ; Morgan, J. D. ; Dalgarno, A. / Double photoionization of excited 1S and 3S states of the helium isoelectronic sequence. In: Physical Review A. 1995 ; Vol. 51, No. 3. pp. 2112-2116.
@article{05e74d69f11c4b0ea831cfb1fbfdee97,
title = "Double photoionization of excited 1S and 3S states of the helium isoelectronic sequence",
abstract = "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.",
author = "Forrey, {R. C.} and Sadeghpour, {H. R.} and Baker, {J. D.} and Morgan, {J. D.} and A. Dalgarno",
year = "1995",
month = "1",
day = "1",
doi = "10.1103/PhysRevA.51.2112",
language = "English (US)",
volume = "51",
pages = "2112--2116",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "3",

}

Double photoionization of excited 1S and 3S states of the helium isoelectronic sequence. / Forrey, R. C.; Sadeghpour, H. R.; Baker, J. D.; Morgan, J. D.; Dalgarno, A.

In: Physical Review A, Vol. 51, No. 3, 01.01.1995, p. 2112-2116.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Double photoionization of excited 1S and 3S states of the helium isoelectronic sequence

AU - Forrey, R. C.

AU - Sadeghpour, H. R.

AU - Baker, J. D.

AU - Morgan, J. D.

AU - Dalgarno, A.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0000624053&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000624053&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.51.2112

DO - 10.1103/PhysRevA.51.2112

M3 - Article

AN - SCOPUS:0000624053

VL - 51

SP - 2112

EP - 2116

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 3

ER -