Penning and associative ionization of triplet metastable helium atoms

B. J. Garrison; W. H. Miller; H. F. Schaefer

doi:10.1063/1.1680460

Penning and associative ionization of triplet metastable helium atoms

B. J. Garrison, W. H. Miller, H. F. Schaefer

Chemistry

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30 Scopus citations

Abstract

Potential energy curves for the ¹Σ_g ⁺, ³Σ_u⁺, and ⁵Σ_g⁺ states which arise from two triplet metastable helium atoms (ls 2s³S) have been calculated by a large configuration interaction expansion. From the potential curves for the ¹Σ_g⁺ and ³Σ _u⁺ autoionizing states, cross section for Penning and associative ionization have been calculated; the total ionization cross section for thermal energy (0.026 eV) collisions, for example, is computed to be 94 Å². In this low energy region the orbiting model is seen to be adequate for determining the total ionization cross section, but not the more specific cross sections.

Original language	English (US)
Pages (from-to)	3182-3192
Number of pages	11
Journal	The Journal of chemical physics
DOIs	https://doi.org/10.1063/1.1680460
State	Published - 1973

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Penning and associative ionization of triplet metastable helium atoms",

abstract = "Potential energy curves for the 1Σg +, 3Σu+, and 5Σg+ states which arise from two triplet metastable helium atoms (ls 2s3S) have been calculated by a large configuration interaction expansion. From the potential curves for the 1Σg+ and 3Σ u+ autoionizing states, cross section for Penning and associative ionization have been calculated; the total ionization cross section for thermal energy (0.026 eV) collisions, for example, is computed to be 94 {\AA}2. In this low energy region the orbiting model is seen to be adequate for determining the total ionization cross section, but not the more specific cross sections.",

author = "Garrison, {B. J.} and Miller, {W. H.} and Schaefer, {H. F.}",

year = "1973",

doi = "10.1063/1.1680460",

language = "English (US)",

pages = "3182--3192",

journal = "The Journal of chemical physics",

issn = "0021-9606",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Penning and associative ionization of triplet metastable helium atoms

AU - Garrison, B. J.

AU - Miller, W. H.

AU - Schaefer, H. F.

PY - 1973

Y1 - 1973

N2 - Potential energy curves for the 1Σg +, 3Σu+, and 5Σg+ states which arise from two triplet metastable helium atoms (ls 2s3S) have been calculated by a large configuration interaction expansion. From the potential curves for the 1Σg+ and 3Σ u+ autoionizing states, cross section for Penning and associative ionization have been calculated; the total ionization cross section for thermal energy (0.026 eV) collisions, for example, is computed to be 94 Å2. In this low energy region the orbiting model is seen to be adequate for determining the total ionization cross section, but not the more specific cross sections.

AB - Potential energy curves for the 1Σg +, 3Σu+, and 5Σg+ states which arise from two triplet metastable helium atoms (ls 2s3S) have been calculated by a large configuration interaction expansion. From the potential curves for the 1Σg+ and 3Σ u+ autoionizing states, cross section for Penning and associative ionization have been calculated; the total ionization cross section for thermal energy (0.026 eV) collisions, for example, is computed to be 94 Å2. In this low energy region the orbiting model is seen to be adequate for determining the total ionization cross section, but not the more specific cross sections.

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JO - The Journal of chemical physics

JF - The Journal of chemical physics

ER -

Penning and associative ionization of triplet metastable helium atoms

Abstract

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