Recommended electron-impact excitation and ionization cross sections for Be I

Dipti; Das, T.; Bartschat, K.; Bray, Igor; Fursa, Dmitry; Zatsarinny, O.; Ballance, C.; Chung, H.; Ralchenko, Y.

doi:10.1016/j.adt.2018.11.001

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Authors

Dipti

Das, T.

Bartschat, K.

Bray, Igor

Fursa, Dmitry

Zatsarinny, O.

Ballance, C.

Chung, H.

Ralchenko, Y.

Date

2018

Type

Journal Article

Metadata

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Citation

Dipti and Das, T. and Bartschat, K. and Bray, I. and Fursa, D. and Zatsarinny, O. and Ballance, C. et al. 2018. Recommended electron-impact excitation and ionization cross sections for Be I. Atomic Data and Nuclear Data Tables. 127-128: pp. 1-21.

Source Title

Atomic Data and Nuclear Data Tables

DOI

10.1016/j.adt.2018.11.001

ISSN

0092-640X

School

School of Electrical Engineering, Computing and Mathematical Science (EECMS)

URI

http://hdl.handle.net/20.500.11937/72848

Collection

Curtin Research Publications

Abstract

Analytic fits to the recommended electron-impact excitation and ionization cross sections for Be I are presented. The lowest 19 terms of configurations 2snl (n= 4) and 2p2 terms below the first ionization limit are considered. The fits are based on the accurate calculations with the convergent close coupling (CCC) method as well as the B-spline R-matrix (BSR) approach. The fitted cross sections provide rate coefficients that are believed to approximate the original data within 10% with very few exceptions. The oscillator strengths for the dipole-allowed transitions between all the considered states are calculated with the relativistic multi-configuration Dirac–Hartree–Fock (MCDHF) approach and compared with the CCC and BSR results. This comparison shows a very good agreement except for a handful of cases with likely strong cancellations.