Resonance asymmetry and external field effects in the photorecombination of Ti4+

D. Nikolic, T.W. Gorczyca, N.R. Badnell

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report on multiconfiguration Breit-Pauli calculations for the photorecombination of Ti4+ ions. Through a detailed comparison with the Test Storage Ring measurements of Schippers , we quantify the interference effects for the broad, asymmetric, near-threshold, highly correlated 3p(5)3d(2)(F-2) resonances. We also discuss the enhanced field ionization effects on recombined 3p(6)nl Rydberg states. This is due to the perturbation of the below-threshold tails of two of the broad 3p(5)3d(2)(F-2) resonances, giving rise to a "forced autoionization" phenomenon, increasing the field ionization effects. By accounting for interference for the lowest n=3,4 resonances, and field effects as n ->infinity, excellent agreement between our computed results and the experimental photorecombination spectrum is obtained.
LanguageEnglish
Pages012703-1-012703-17
JournalPhysical Review A
Volume79
Issue number1
DOIs
Publication statusPublished - Jan 2009

Fingerprint

asymmetry
interference
ionization
thresholds
autoionization
infinity
perturbation
ions

Keywords

  • autoionisation
  • configuration interactions
  • field ionisation
  • ion recombination
  • positive ions
  • resonant states
  • Rydberg states
  • titanium

Cite this

Nikolic, D. ; Gorczyca, T.W. ; Badnell, N.R. / Resonance asymmetry and external field effects in the photorecombination of Ti4+. In: Physical Review A. 2009 ; Vol. 79, No. 1. pp. 012703-1-012703-17.
@article{e46c8cab49ff4903a963ee353f7e4c31,
title = "Resonance asymmetry and external field effects in the photorecombination of Ti4+",
abstract = "We report on multiconfiguration Breit-Pauli calculations for the photorecombination of Ti4+ ions. Through a detailed comparison with the Test Storage Ring measurements of Schippers , we quantify the interference effects for the broad, asymmetric, near-threshold, highly correlated 3p(5)3d(2)(F-2) resonances. We also discuss the enhanced field ionization effects on recombined 3p(6)nl Rydberg states. This is due to the perturbation of the below-threshold tails of two of the broad 3p(5)3d(2)(F-2) resonances, giving rise to a {"}forced autoionization{"} phenomenon, increasing the field ionization effects. By accounting for interference for the lowest n=3,4 resonances, and field effects as n ->infinity, excellent agreement between our computed results and the experimental photorecombination spectrum is obtained.",
keywords = "autoionisation, configuration interactions, field ionisation, ion recombination, positive ions, resonant states, Rydberg states, titanium",
author = "D. Nikolic and T.W. Gorczyca and N.R. Badnell",
year = "2009",
month = "1",
doi = "10.1103/PhysRevA.79.012703",
language = "English",
volume = "79",
pages = "012703--1--012703--17",
journal = "Physical Review A - Atomic, Molecular, and Optical Physics",
issn = "1050-2947",
number = "1",

}

Resonance asymmetry and external field effects in the photorecombination of Ti4+. / Nikolic, D.; Gorczyca, T.W.; Badnell, N.R.

In: Physical Review A, Vol. 79, No. 1, 01.2009, p. 012703-1-012703-17.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Resonance asymmetry and external field effects in the photorecombination of Ti4+

AU - Nikolic, D.

AU - Gorczyca, T.W.

AU - Badnell, N.R.

PY - 2009/1

Y1 - 2009/1

N2 - We report on multiconfiguration Breit-Pauli calculations for the photorecombination of Ti4+ ions. Through a detailed comparison with the Test Storage Ring measurements of Schippers , we quantify the interference effects for the broad, asymmetric, near-threshold, highly correlated 3p(5)3d(2)(F-2) resonances. We also discuss the enhanced field ionization effects on recombined 3p(6)nl Rydberg states. This is due to the perturbation of the below-threshold tails of two of the broad 3p(5)3d(2)(F-2) resonances, giving rise to a "forced autoionization" phenomenon, increasing the field ionization effects. By accounting for interference for the lowest n=3,4 resonances, and field effects as n ->infinity, excellent agreement between our computed results and the experimental photorecombination spectrum is obtained.

AB - We report on multiconfiguration Breit-Pauli calculations for the photorecombination of Ti4+ ions. Through a detailed comparison with the Test Storage Ring measurements of Schippers , we quantify the interference effects for the broad, asymmetric, near-threshold, highly correlated 3p(5)3d(2)(F-2) resonances. We also discuss the enhanced field ionization effects on recombined 3p(6)nl Rydberg states. This is due to the perturbation of the below-threshold tails of two of the broad 3p(5)3d(2)(F-2) resonances, giving rise to a "forced autoionization" phenomenon, increasing the field ionization effects. By accounting for interference for the lowest n=3,4 resonances, and field effects as n ->infinity, excellent agreement between our computed results and the experimental photorecombination spectrum is obtained.

KW - autoionisation

KW - configuration interactions

KW - field ionisation

KW - ion recombination

KW - positive ions

KW - resonant states

KW - Rydberg states

KW - titanium

UR - http://dx.doi.org/10.1103/PhysRevA.79.012703

U2 - 10.1103/PhysRevA.79.012703

DO - 10.1103/PhysRevA.79.012703

M3 - Article

VL - 79

SP - 012703-1-012703-17

JO - Physical Review A - Atomic, Molecular, and Optical Physics

T2 - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 1

ER -