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

Journal Article · Mon Dec 14 04:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.3425· OSTI ID:6937525

Shutt, T; Ellman, B; Barnes, Jr, P D; Cummings, A; Da Silva, A; Emes, J; Giraud-Heraud, 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 ^[1]

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1. Center for Particle Astrophysics; University of California at Berkeley; Berkeley; California 94720 (United States) Department of Physics; University of California at Berkeley; Berkeley; California 94720 (United States) Department of Material Science Mineral Engineering; University of California at Berkeley; Berkeley; California 94720 (United States) Lawrence Berkeley Laboratory; 1 Cyclotron Road; Berkeley; California; 94720 (United States) Department of Physics; University of California at Santa Barbara; Santa Barbara; California 93106 (United States) Department d'Astrophysique; de Physique des Particules; de Physique Nucleaire et de l'Instrumentation Associee-Service Physique des Particles Centre d'Etudes de Saclay; 91191 Gif-Sur-Yvette; CEDEX (

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 [approx]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.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6937525
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:24; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

661000* -- General Physics-- (1992-)
663620 -- Physics of Radiations Other Than Neutrons-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DATA
DETECTION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EXPERIMENTAL DATA
FERMIONS
GAMMA DETECTION
GERMANIUM
INFORMATION
IONIZATION
LEPTONS
MEASURING METHODS
METALS
NEUTRON DETECTION
NUCLEI
NUMERICAL DATA
PARAMETRIC ANALYSIS
PHONONS
QUASI PARTICLES
RADIATION DETECTION
RECOILS
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K