A new technique for measuring positron impact direct ionisation

Joshua R. Machacek; Tamara J. Babij; Daniel J. Murtagh; Steven J. Buckman; James P. Sullivan

doi:10.1140/epjd/e2017-80533-7

A new technique for measuring positron impact direct ionisation

Joshua R. Machacek^*, Tamara J. Babij, Daniel J. Murtagh, Steven J. Buckman, James P. Sullivan

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

Abstract: We present a method for measuring the electron yield in positron impact direct ionisation of atomic or molecular targets using a magnetically confined positron beam. This method can be used to determine the (relative) direct ionisation cross section. The use of this technique and a Surko trap based positron beam allows the electron yield to be measured at impact energies as low as 100 meV above the direct ionisation threshold. Application of this technique to the measurement of the energy dependence of the direct ionisation cross section near threshold is also discussed. Graphical abstract: [Figure not available: see fulltext.].

Original language	English
Article number	328
Journal	European Physical Journal D
Volume	71
Issue number	12
DOIs	https://doi.org/10.1140/epjd/e2017-80533-7
Publication status	Published - 1 Dec 2017

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@article{65f5955e0f5046b6a5810dbf85a078b7,

title = "A new technique for measuring positron impact direct ionisation",

abstract = "Abstract: We present a method for measuring the electron yield in positron impact direct ionisation of atomic or molecular targets using a magnetically confined positron beam. This method can be used to determine the (relative) direct ionisation cross section. The use of this technique and a Surko trap based positron beam allows the electron yield to be measured at impact energies as low as 100 meV above the direct ionisation threshold. Application of this technique to the measurement of the energy dependence of the direct ionisation cross section near threshold is also discussed. Graphical abstract: [Figure not available: see fulltext.].",

author = "Machacek, {Joshua R.} and Babij, {Tamara J.} and Murtagh, {Daniel J.} and Buckman, {Steven J.} and Sullivan, {James P.}",

note = "Publisher Copyright: {\textcopyright} 2017, EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature.",

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T1 - A new technique for measuring positron impact direct ionisation

AU - Machacek, Joshua R.

AU - Babij, Tamara J.

AU - Murtagh, Daniel J.

AU - Buckman, Steven J.

AU - Sullivan, James P.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Abstract: We present a method for measuring the electron yield in positron impact direct ionisation of atomic or molecular targets using a magnetically confined positron beam. This method can be used to determine the (relative) direct ionisation cross section. The use of this technique and a Surko trap based positron beam allows the electron yield to be measured at impact energies as low as 100 meV above the direct ionisation threshold. Application of this technique to the measurement of the energy dependence of the direct ionisation cross section near threshold is also discussed. Graphical abstract: [Figure not available: see fulltext.].

AB - Abstract: We present a method for measuring the electron yield in positron impact direct ionisation of atomic or molecular targets using a magnetically confined positron beam. This method can be used to determine the (relative) direct ionisation cross section. The use of this technique and a Surko trap based positron beam allows the electron yield to be measured at impact energies as low as 100 meV above the direct ionisation threshold. Application of this technique to the measurement of the energy dependence of the direct ionisation cross section near threshold is also discussed. Graphical abstract: [Figure not available: see fulltext.].

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U2 - 10.1140/epjd/e2017-80533-7

DO - 10.1140/epjd/e2017-80533-7

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SN - 1434-6060

VL - 71

JO - European Physical Journal D

JF - European Physical Journal D

IS - 12

M1 - 328

ER -

A new technique for measuring positron impact direct ionisation

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