Demonstration of nuclear recoil discrimination for low temperature dark matter detectors, by measurement of simultaneous ionization and thermal pulses in silicon

Spooner, N.J.C.; Bewick, A.; Homer, G.J.; Smith, P.F.; Lewin, J.D.

doi:10.1016/0370-2693(91)91693-P

Demonstration of nuclear recoil discrimination for low temperature dark matter detectors, by measurement of simultaneous ionization and thermal pulses in silicon

1991

5 pages

Published in:

Phys.Lett.B 273 (1991) 333-337

Published: 1991

DOI:

10.1016/0370-2693(91)91693-P

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Abstract: (Elsevier)

We report experiments using a silicon target exposed to a neutron source, giving both nuclear recoil events from neutron scattering and electron recoil events from photon scattering. We show that simultaneous measurement of ionization and thermal energy for each event allows the neutron and photon events to be separated. The degree of separation of the nuclear recoil events, and their absolute event rate, are consistent with theoretical expectation.

n nucleus: nuclear reaction
silicon
nucleus: recoil
photon nucleus: interaction
interaction: photon nucleus
electron: recoil
ionization
cryogenics
experimental results

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