Simultaneous measurement of thermal and ionization signals in a 60 g cryogenic germanium detector

Author

Barnes, P.D. ; Da Silva, Alzennyr ; Ellman, B. ; Emes, J. ; Haller, Eugene E. ; Lange, A.E. ; Ing, K. ; Ross, R.R. ; Sadoulet, B. ; Shutt, T. ; Smith, G. ; Stubbs, C. ; Wang, N. ; White, S. ; Yvon, D.

Author_Institution

Dept. of Phys., California Univ., Berkeley, CA, USA

fYear

1991

fDate

2-9 Nov. 1991

Firstpage

60

Abstract

The authors present new results from a cryogenic detector instrumented to measure both the phonon and ionization signals in a 60 g Ge disk operated at 30 mK. Significant improvements in the electronics noise, threshold, and energy resolution of the device have been made. The baseline full width at half maximum (FWHM) corresponding to total system noise, is 1.55 keV in the phonon channel and 1.59 keV in the ionization channel. At 60 keV the FWHM is 1.9 keV and 1.7 keV in the phonon and ionization channels, respectively. A discrimination between electron recoils and nuclear recoils at low energy has been demonstrated.<>

Keywords

semiconductor counters; semiconductor device noise; 1.55 to 1.9 keV; 30 mK; 60 g; FWHM; cryogenic Ge detector; electron recoils; energy resolution; full width at half maximum; ionization signals; noise; nuclear recoils; phonon; threshold; Cryogenics; Detectors; Electromagnetic scattering; Electrons; Energy resolution; Extraterrestrial measurements; Germanium; Ionization; Particle scattering; Phonons;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE

Conference_Location

Santa Fe, NM, USA

Print_ISBN

0-7803-0513-2

Type

conf

DOI

10.1109/NSSMIC.1991.258920

Filename

258920