Benchmark Integral Cross Sections for Electron Impact Excitation of the n=2 States in Helium

M Hoshino; H Kato; D Suzuki; H Tanaka; I Bray; D Fursa; S Buckman; O Ingolfsson; Michael Brunger

doi:10.1088/1009-0630/12/3/20

Benchmark Integral Cross Sections for Electron Impact Excitation of the n=2 States in Helium

M Hoshino, H Kato, D Suzuki, H Tanaka, I Bray, D Fursa, S Buckman, O Ingolfsson, Michael Brunger

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

3 Citations (Scopus)

Abstract

In this paper, we present integral cross sections (ICS) for electron impact excitation of the n=2 levels in helium in the impact energy range of 23.5 eV to 35 eV. The ICS of each final state, 2³S, 2¹S, 2 ³P and 2¹P, has been determined by integration of the angular differential cross sections (DCS) over all of 0° to 180°, where those DCS were obtained from both our previous experiments and the extrapolation using the convergent close coupling calculation. The present experimental ICS for the optically allowed 2¹P transition state are also compared with those obtained from the BEf-scaling method. Very good agreement between the experimental and BEf-scaled 2¹P ICSs is generally found in the measured impact energy region.

Original language	English
Pages (from-to)	348-352
Number of pages	5
Journal	Plasma Science and Technology
Volume	12
Issue number	3
DOIs	https://doi.org/10.1088/1009-0630/12/3/20
Publication status	Published - 2010

Keywords

electronic excitations
helium
low energy electron impact

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10.1088/1009-0630/12/3/20

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title = "Benchmark Integral Cross Sections for Electron Impact Excitation of the n=2 States in Helium",

abstract = "In this paper, we present integral cross sections (ICS) for electron impact excitation of the n=2 levels in helium in the impact energy range of 23.5 eV to 35 eV. The ICS of each final state, 23S, 21S, 2 3P and 21P, has been determined by integration of the angular differential cross sections (DCS) over all of 0° to 180°, where those DCS were obtained from both our previous experiments and the extrapolation using the convergent close coupling calculation. The present experimental ICS for the optically allowed 21P transition state are also compared with those obtained from the BEf-scaling method. Very good agreement between the experimental and BEf-scaled 21P ICSs is generally found in the measured impact energy region.",

keywords = "electronic excitations, helium, low energy electron impact",

author = "M Hoshino and H Kato and D Suzuki and H Tanaka and I Bray and D Fursa and S Buckman and O Ingolfsson and Michael Brunger",

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T1 - Benchmark Integral Cross Sections for Electron Impact Excitation of the n=2 States in Helium

AU - Hoshino, M

AU - Kato, H

AU - Suzuki, D

AU - Tanaka, H

AU - Bray, I

AU - Fursa, D

AU - Buckman, S

AU - Ingolfsson, O

AU - Brunger, Michael

PY - 2010

Y1 - 2010

N2 - In this paper, we present integral cross sections (ICS) for electron impact excitation of the n=2 levels in helium in the impact energy range of 23.5 eV to 35 eV. The ICS of each final state, 23S, 21S, 2 3P and 21P, has been determined by integration of the angular differential cross sections (DCS) over all of 0° to 180°, where those DCS were obtained from both our previous experiments and the extrapolation using the convergent close coupling calculation. The present experimental ICS for the optically allowed 21P transition state are also compared with those obtained from the BEf-scaling method. Very good agreement between the experimental and BEf-scaled 21P ICSs is generally found in the measured impact energy region.

AB - In this paper, we present integral cross sections (ICS) for electron impact excitation of the n=2 levels in helium in the impact energy range of 23.5 eV to 35 eV. The ICS of each final state, 23S, 21S, 2 3P and 21P, has been determined by integration of the angular differential cross sections (DCS) over all of 0° to 180°, where those DCS were obtained from both our previous experiments and the extrapolation using the convergent close coupling calculation. The present experimental ICS for the optically allowed 21P transition state are also compared with those obtained from the BEf-scaling method. Very good agreement between the experimental and BEf-scaled 21P ICSs is generally found in the measured impact energy region.

KW - electronic excitations

KW - helium

KW - low energy electron impact

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U2 - 10.1088/1009-0630/12/3/20

DO - 10.1088/1009-0630/12/3/20

M3 - Article

VL - 12

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EP - 352

JO - Plasma Science and Technology

JF - Plasma Science and Technology

SN - 1009-0630

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