Dielectronic and trielectronic recombination rate coefficients of Be-like Ar14+

Z. K. Huang, W. Q. Wen, X. Xu, S. Mahmood, S. X. Wang, H. B. Wang, L. J. Dou, N. Khan, N. R. Badnell, S. P. Preval, S. Schippers, T. H. Xu, Y. Yang, K. Yao, W. Q. Xu, X. Y. Chuai, X. L. Zhu, D. M. Zhao, L. J. Mao, X. M. Ma & 9 others J. Li, R. S. Mao, Y. J. Yuan, B. Wu, L. N. Sheng, J. C. Yang, H. S. Xu, L. F. Zhu, X. Ma

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Electron–ion recombination of Be-like 40Ar14+ has been measured by employing the electron–ion merged-beams method at the cooler storage ring CSRm. The measured absolute recombination rate coefficients for collision energies from 0 to 60 eV are presented, covering all dielectronic recombination (DR) resonances associated with 2s 2 → 2s2p core transitions. In addition, strong trielectronic recombination (TR) resonances associated with 2s 2 → 2p 2 core transitions were observed. Both DR and TR processes lead to series of peaks in the measured recombination spectrum, which have been identified by the Rydberg formula. Theoretical calculations of recombination rate coefficients were performed using the state-of-the-art multi-configuration Breit–Pauli atomic structure code AUTOSTRUCTURE to compare with the experimental results. The plasma rate coefficients for DR+TR of Ar14+ were deduced from the measured electron–ion recombination rate coefficients in the temperature range from 103 to 107 K, and compared with calculated data from the literature. The experimentally derived plasma rate coefficients are 60% larger and 30% lower than the previously recommended atomic data for the temperature ranges of photoionized plasmas and collisionally ionized plasmas, respectively. However, good agreement was found between experimental results and the calculations by Gu and Colgan et al. The plasma rate coefficients deduced from experiment and calculated by the current AUTOSTRUCTURE code show agreement that is better than 30% from 104 to 107 K. The present results constitute a set of benchmark data for use in astrophysical modeling.
LanguageEnglish
Number of pages8
JournalAstrophysical Journal, Supplement Series
Volume235
Issue number1
Early online date21 Feb 2018
DOIs
Publication statusPublished - 31 Mar 2018

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recombination
coefficients
electron-ion recombination
plasma
electron
coolers
atomic structure
ion
rate
astrophysics
coverings
ion beams
electron beams
collisions
temperature
configurations
collision
energy

Keywords

  • atomic data
  • atomic processes
  • plasmas

Cite this

Huang, Z. K. ; Wen, W. Q. ; Xu, X. ; Mahmood, S. ; Wang, S. X. ; Wang, H. B. ; Dou, L. J. ; Khan, N. ; Badnell, N. R. ; Preval, S. P. ; Schippers, S. ; Xu, T. H. ; Yang, Y. ; Yao, K. ; Xu, W. Q. ; Chuai, X. Y. ; Zhu, X. L. ; Zhao, D. M. ; Mao, L. J. ; Ma, X. M. ; Li, J. ; Mao, R. S. ; Yuan, Y. J. ; Wu, B. ; Sheng, L. N. ; Yang, J. C. ; Xu, H. S. ; Zhu, L. F. ; Ma, X. / Dielectronic and trielectronic recombination rate coefficients of Be-like Ar14+. In: Astrophysical Journal, Supplement Series. 2018 ; Vol. 235, No. 1.
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title = "Dielectronic and trielectronic recombination rate coefficients of Be-like Ar14+",
abstract = "Electron–ion recombination of Be-like 40Ar14+ has been measured by employing the electron–ion merged-beams method at the cooler storage ring CSRm. The measured absolute recombination rate coefficients for collision energies from 0 to 60 eV are presented, covering all dielectronic recombination (DR) resonances associated with 2s 2 → 2s2p core transitions. In addition, strong trielectronic recombination (TR) resonances associated with 2s 2 → 2p 2 core transitions were observed. Both DR and TR processes lead to series of peaks in the measured recombination spectrum, which have been identified by the Rydberg formula. Theoretical calculations of recombination rate coefficients were performed using the state-of-the-art multi-configuration Breit–Pauli atomic structure code AUTOSTRUCTURE to compare with the experimental results. The plasma rate coefficients for DR+TR of Ar14+ were deduced from the measured electron–ion recombination rate coefficients in the temperature range from 103 to 107 K, and compared with calculated data from the literature. The experimentally derived plasma rate coefficients are 60{\%} larger and 30{\%} lower than the previously recommended atomic data for the temperature ranges of photoionized plasmas and collisionally ionized plasmas, respectively. However, good agreement was found between experimental results and the calculations by Gu and Colgan et al. The plasma rate coefficients deduced from experiment and calculated by the current AUTOSTRUCTURE code show agreement that is better than 30{\%} from 104 to 107 K. The present results constitute a set of benchmark data for use in astrophysical modeling.",
keywords = "atomic data, atomic processes, plasmas",
author = "Huang, {Z. K.} and Wen, {W. Q.} and X. Xu and S. Mahmood and Wang, {S. X.} and Wang, {H. B.} and Dou, {L. J.} and N. Khan and Badnell, {N. R.} and Preval, {S. P.} and S. Schippers and Xu, {T. H.} and Y. Yang and K. Yao and Xu, {W. Q.} and Chuai, {X. Y.} and Zhu, {X. L.} and Zhao, {D. M.} and Mao, {L. J.} and Ma, {X. M.} and J. Li and Mao, {R. S.} and Yuan, {Y. J.} and B. Wu and Sheng, {L. N.} and Yang, {J. C.} and Xu, {H. S.} and Zhu, {L. F.} and X. Ma",
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Huang, ZK, Wen, WQ, Xu, X, Mahmood, S, Wang, SX, Wang, HB, Dou, LJ, Khan, N, Badnell, NR, Preval, SP, Schippers, S, Xu, TH, Yang, Y, Yao, K, Xu, WQ, Chuai, XY, Zhu, XL, Zhao, DM, Mao, LJ, Ma, XM, Li, J, Mao, RS, Yuan, YJ, Wu, B, Sheng, LN, Yang, JC, Xu, HS, Zhu, LF & Ma, X 2018, 'Dielectronic and trielectronic recombination rate coefficients of Be-like Ar14+' Astrophysical Journal, Supplement Series, vol. 235, no. 1. https://doi.org/10.3847/1538-4365/aaa5b3

Dielectronic and trielectronic recombination rate coefficients of Be-like Ar14+. / Huang, Z. K.; Wen, W. Q.; Xu, X.; Mahmood, S.; Wang, S. X.; Wang, H. B.; Dou, L. J.; Khan, N.; Badnell, N. R.; Preval, S. P.; Schippers, S.; Xu, T. H.; Yang, Y.; Yao, K.; Xu, W. Q.; Chuai, X. Y.; Zhu, X. L.; Zhao, D. M.; Mao, L. J.; Ma, X. M.; Li, J.; Mao, R. S.; Yuan, Y. J.; Wu, B.; Sheng, L. N.; Yang, J. C. ; Xu, H. S.; Zhu, L. F.; Ma, X.

In: Astrophysical Journal, Supplement Series, Vol. 235, No. 1, 31.03.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dielectronic and trielectronic recombination rate coefficients of Be-like Ar14+

AU - Huang, Z. K.

AU - Wen, W. Q.

AU - Xu, X.

AU - Mahmood, S.

AU - Wang, S. X.

AU - Wang, H. B.

AU - Dou, L. J.

AU - Khan, N.

AU - Badnell, N. R.

AU - Preval, S. P.

AU - Schippers, S.

AU - Xu, T. H.

AU - Yang, Y.

AU - Yao, K.

AU - Xu, W. Q.

AU - Chuai, X. Y.

AU - Zhu, X. L.

AU - Zhao, D. M.

AU - Mao, L. J.

AU - Ma, X. M.

AU - Li, J.

AU - Mao, R. S.

AU - Yuan, Y. J.

AU - Wu, B.

AU - Sheng, L. N.

AU - Yang, J. C.

AU - Xu, H. S.

AU - Zhu, L. F.

AU - Ma, X.

PY - 2018/3/31

Y1 - 2018/3/31

N2 - Electron–ion recombination of Be-like 40Ar14+ has been measured by employing the electron–ion merged-beams method at the cooler storage ring CSRm. The measured absolute recombination rate coefficients for collision energies from 0 to 60 eV are presented, covering all dielectronic recombination (DR) resonances associated with 2s 2 → 2s2p core transitions. In addition, strong trielectronic recombination (TR) resonances associated with 2s 2 → 2p 2 core transitions were observed. Both DR and TR processes lead to series of peaks in the measured recombination spectrum, which have been identified by the Rydberg formula. Theoretical calculations of recombination rate coefficients were performed using the state-of-the-art multi-configuration Breit–Pauli atomic structure code AUTOSTRUCTURE to compare with the experimental results. The plasma rate coefficients for DR+TR of Ar14+ were deduced from the measured electron–ion recombination rate coefficients in the temperature range from 103 to 107 K, and compared with calculated data from the literature. The experimentally derived plasma rate coefficients are 60% larger and 30% lower than the previously recommended atomic data for the temperature ranges of photoionized plasmas and collisionally ionized plasmas, respectively. However, good agreement was found between experimental results and the calculations by Gu and Colgan et al. The plasma rate coefficients deduced from experiment and calculated by the current AUTOSTRUCTURE code show agreement that is better than 30% from 104 to 107 K. The present results constitute a set of benchmark data for use in astrophysical modeling.

AB - Electron–ion recombination of Be-like 40Ar14+ has been measured by employing the electron–ion merged-beams method at the cooler storage ring CSRm. The measured absolute recombination rate coefficients for collision energies from 0 to 60 eV are presented, covering all dielectronic recombination (DR) resonances associated with 2s 2 → 2s2p core transitions. In addition, strong trielectronic recombination (TR) resonances associated with 2s 2 → 2p 2 core transitions were observed. Both DR and TR processes lead to series of peaks in the measured recombination spectrum, which have been identified by the Rydberg formula. Theoretical calculations of recombination rate coefficients were performed using the state-of-the-art multi-configuration Breit–Pauli atomic structure code AUTOSTRUCTURE to compare with the experimental results. The plasma rate coefficients for DR+TR of Ar14+ were deduced from the measured electron–ion recombination rate coefficients in the temperature range from 103 to 107 K, and compared with calculated data from the literature. The experimentally derived plasma rate coefficients are 60% larger and 30% lower than the previously recommended atomic data for the temperature ranges of photoionized plasmas and collisionally ionized plasmas, respectively. However, good agreement was found between experimental results and the calculations by Gu and Colgan et al. The plasma rate coefficients deduced from experiment and calculated by the current AUTOSTRUCTURE code show agreement that is better than 30% from 104 to 107 K. The present results constitute a set of benchmark data for use in astrophysical modeling.

KW - atomic data

KW - atomic processes

KW - plasmas

UR - http://iopscience.iop.org/issue/0067-0049/235/1

U2 - 10.3847/1538-4365/aaa5b3

DO - 10.3847/1538-4365/aaa5b3

M3 - Article

VL - 235

JO - Astrophysical Journal Supplement

T2 - Astrophysical Journal Supplement

JF - Astrophysical Journal Supplement

SN - 0067-0049

IS - 1

ER -