Measurement of ionization and phonon production by nuclear recoils in a 60 g crystal of germanium at 25 mK

Authors

Tom Shutt
B. Ellman
P. D. Barnes Jr.
Alan Cummings
Angela Da Silva
John Emes
Y. Giraud-Héraud
Eugene E. Haller
Andrew E. Lange
Ron R. Ross
J. Rich
Bernard Sadoulet
G. Smith
W. Stockwell
C. Stubbs
N. Wang
S. White
Betty A. Young, Santa Clara UniversityFollow
D. Yvon

Document Type

Article

Publication Date

12-14-1992

Publisher

American Physical Society

Abstract

We report on the first measurement of the absolute phonon energy and the amount of ionization produced by the recoil of nuclei and electrons in a 60 g germanium cyrstal at a temperature of ≊25 mK. We find good agreement between our results and previous measurements of ionization yield from nuclear recoils in germanium. Our device achieves 10:1 discrimination between neutrons and photons in the few keV energy range, demonstrating the feasibility of this technique for large reductions of background in searches for direct interactions of weakly interacting massive particle dark matter.

Comments

Copyright © 1992 American Physical Society. Reprinted with permission.

Recommended Citation

Shutt, T., Ellman, B., Barnes, P. D., Cummings, A., Da Silva, A., Emes, J., Giraud-Héraud, Y., Haller, E. E., Lange, A. E., Ross, R. R., Rich, J., Sadoulet, B., Smith, G., Stockwell, W., Stubbs, C., Wang, N., White, S., Young, B. A., & Yvon, D. (1992). Measurement of ionization and phonon production by nuclear recoils in a 60 g crystal of germanium at 25 mK. Physical Review Letters, 69(24), 3425–3427. https://doi.org/10.1103/PhysRevLett.69.3425