### 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 language | English (US) |
---|---|

Pages (from-to) | 2112-2116 |

Number of pages | 5 |

Journal | Physical Review A |

Volume | 51 |

Issue number | 3 |

DOIs | |

State | Published - Jan 1 1995 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Atomic and Molecular Physics, and Optics

### Cite this

*Physical Review A*,

*51*(3), 2112-2116. https://doi.org/10.1103/PhysRevA.51.2112

}

*Physical Review A*, vol. 51, no. 3, pp. 2112-2116. https://doi.org/10.1103/PhysRevA.51.2112

**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.

Research output: Contribution to journal › Article

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 -