Neutron ionization of helium near the neutron-alpha particle collision resonance

M. S. Pindzola; J. Colgan; M. F. Ciappina

doi:10.1088/1361-6455/aba9af

Neutron ionization of helium near the neutron-alpha particle collision resonance

M. S. Pindzola, J. Colgan^*, M. F. Ciappina

^*Corresponding author for this work

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

1 Scopus citations

Abstract

Neutron-impact single and double ionization cross sections of the He atom are calculated near the neutron-alpha particle collision resonance. Calculations using the time-dependent close-coupling method for total and differential cross sections are made at 8 incident neutron energies ranging from 250 to 2000 keV. At the resonance energy peak the double ionization cross sections unexpectedly become larger than the single ionization cross sections. This finding appears to be related to the high velocity of the recoiling alpha particle, which makes it unlikely that the atomic electrons can recombine with the alpha particle nucleus, enhancing the double ionization cross section.

Original language	English
Article number	205201
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	53
Issue number	20
DOIs	https://doi.org/10.1088/1361-6455/aba9af
State	Published - 29 Oct 2020
Externally published	Yes

Keywords

double ionization,Migdal effect
neutron-impact

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10.1088/1361-6455/aba9af

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title = "Neutron ionization of helium near the neutron-alpha particle collision resonance",

abstract = "Neutron-impact single and double ionization cross sections of the He atom are calculated near the neutron-alpha particle collision resonance. Calculations using the time-dependent close-coupling method for total and differential cross sections are made at 8 incident neutron energies ranging from 250 to 2000 keV. At the resonance energy peak the double ionization cross sections unexpectedly become larger than the single ionization cross sections. This finding appears to be related to the high velocity of the recoiling alpha particle, which makes it unlikely that the atomic electrons can recombine with the alpha particle nucleus, enhancing the double ionization cross section.",

keywords = "double ionization,Migdal effect, neutron-impact",

author = "Pindzola, {M. S.} and J. Colgan and Ciappina, {M. F.}",

note = "Publisher Copyright: {\textcopyright} 2020 IOP Publishing Ltd.",

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T1 - Neutron ionization of helium near the neutron-alpha particle collision resonance

AU - Pindzola, M. S.

AU - Colgan, J.

AU - Ciappina, M. F.

PY - 2020/10/29

Y1 - 2020/10/29

N2 - Neutron-impact single and double ionization cross sections of the He atom are calculated near the neutron-alpha particle collision resonance. Calculations using the time-dependent close-coupling method for total and differential cross sections are made at 8 incident neutron energies ranging from 250 to 2000 keV. At the resonance energy peak the double ionization cross sections unexpectedly become larger than the single ionization cross sections. This finding appears to be related to the high velocity of the recoiling alpha particle, which makes it unlikely that the atomic electrons can recombine with the alpha particle nucleus, enhancing the double ionization cross section.

AB - Neutron-impact single and double ionization cross sections of the He atom are calculated near the neutron-alpha particle collision resonance. Calculations using the time-dependent close-coupling method for total and differential cross sections are made at 8 incident neutron energies ranging from 250 to 2000 keV. At the resonance energy peak the double ionization cross sections unexpectedly become larger than the single ionization cross sections. This finding appears to be related to the high velocity of the recoiling alpha particle, which makes it unlikely that the atomic electrons can recombine with the alpha particle nucleus, enhancing the double ionization cross section.

KW - double ionization,Migdal effect

KW - neutron-impact

UR - http://www.scopus.com/inward/record.url?scp=85091650099&partnerID=8YFLogxK

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DO - 10.1088/1361-6455/aba9af

M3 - 文章

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SN - 0953-4075

VL - 53

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

IS - 20

M1 - 205201

ER -

Neutron ionization of helium near the neutron-alpha particle collision resonance

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Keywords

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