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

null Dipti; T. Das; K. Bartschat; I. Bray; D. V. Fursa; O. Zatsarinny; C. Ballance; H. K. Chung; Yu Ralchenko

doi:10.1016/j.adt.2018.11.001

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

Dipti^*, T. Das, K. Bartschat, I. Bray, D. V. Fursa, O. Zatsarinny, C. Ballance, H. K. Chung, Yu Ralchenko

^*Corresponding author for this work

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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 2p ² 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.

Original language	English
Pages (from-to)	1-21
Number of pages	21
Journal	Atomic Data and Nuclear Data Tables
Volume	127-128
Early online date	23 Nov 2018
DOIs	https://doi.org/10.1016/j.adt.2018.11.001
Publication status	Published - 01 May 2019

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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title = "Recommended electron-impact excitation and ionization cross sections for Be I",

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 2p 2 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. ",

author = "Dipti and T. Das and K. Bartschat and I. Bray and Fursa, {D. V.} and O. Zatsarinny and C. Ballance and Chung, {H. K.} and Yu Ralchenko",

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doi = "10.1016/j.adt.2018.11.001",

language = "English",

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TY - JOUR

T1 - Recommended electron-impact excitation and ionization cross sections for Be I

AU - Dipti, null

AU - Das, T.

AU - Bartschat, K.

AU - Bray, I.

AU - Fursa, D. V.

AU - Zatsarinny, O.

AU - Ballance, C.

AU - Chung, H. K.

AU - Ralchenko, Yu

PY - 2019/5/1

Y1 - 2019/5/1

N2 - 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 2p 2 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.

AB - 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 2p 2 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.

U2 - 10.1016/j.adt.2018.11.001

DO - 10.1016/j.adt.2018.11.001

M3 - Article

AN - SCOPUS:85057057913

SN - 0092-640X

VL - 127-128

SP - 1

EP - 21

JO - Atomic Data and Nuclear Data Tables

JF - Atomic Data and Nuclear Data Tables

ER -

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

Abstract

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