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A new technique for measuring positron impact direct ionisation

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Date

2017

Authors

Machacek, Joshua
Babij, Tamara
Murtagh, Daniel
Buckman, Stephen
Sullivan, James

Journal Title

Journal ISSN

Volume Title

Publisher

Springer

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.

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Keywords

Citation

URI

http://hdl.handle.net/1885/231141

Collections

ANU Research Publications

Source

European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1140/epjd/e2017-80533-7

Restricted until

2099-12-31

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