Progress report on the search for cold dark matter using ultralow-background germanium detectors at homestake

A. K. Drukier, F. T. Avignone, R. L. Brodzinski, J. I. Collar, G. Gelmini, H. S. Miley, A. Morales, J. H. Reeves, D. Spergel

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26 Scopus citations

Abstract

Counting rates from the two 1-kg PNL/USC ultralow-background germanium detectors are ≤0.3 counts keV-1 kg-1 d-1 between 6 and 9 keV and ∼ 2 counts keV-1 kg-1 d-1 between 4 and 6 keV. These data show a significant short-time rate dependence due to blasting and other mining operations in the Homestake good mine. The mean shift in the centroid of the gallium x-ray peak was about 50 eV over a total period of about 500 days, indicating adequate stability for a search for annual modulation of Cold Dark Matter (CDM) particles.

Original languageEnglish (US)
Pages (from-to)293-296
Number of pages4
JournalNuclear Physics B (Proceedings Supplements)
Volume28
Issue number1
DOIs
StatePublished - Jul 1992

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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    Drukier, A. K., Avignone, F. T., Brodzinski, R. L., Collar, J. I., Gelmini, G., Miley, H. S., Morales, A., Reeves, J. H., & Spergel, D. (1992). Progress report on the search for cold dark matter using ultralow-background germanium detectors at homestake. Nuclear Physics B (Proceedings Supplements), 28(1), 293-296. https://doi.org/10.1016/0920-5632(92)90186-V