1. A BGO scintillating bolometer as dark matter detector prototype
- Author
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Coron, N., García, E., Gironnet, J., Leblanc, J., de Marcillac, P., Martínez, M., Ortigoza, Y., de Solórzano, A. Ortiz, Pobes, C., Puimedón, J., Redon, T., Sarsa, M.L., Torres, L., and Villar, J.A.
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BISMUTH compounds , *SCINTILLATION counters , *BOLOMETERS , *DARK matter , *PROTOTYPES , *PHYSICS laboratories , *NUCLEAR excitation , *WEAK interactions (Nuclear physics) - Abstract
Abstract: A 46g BGO (Bi4Ge3O12) scintillating bolometer has been tested at 20mK as a prototype for dark matter direct detection in the frame of the ROSEBUD (Rare Objects SEarch with Bolometers UndergrounD) collaboration. The bolometer has been operated first in Orsay and then in an ultra-low background environment at the Canfranc Underground Laboratory. We analyze its response both in heat and light, and its particle discrimination capability. Light yield under γ-ray excitation at several energies (from 88.0 to 1633.3keV) and the relative light output for different particles (β/γ, α and neutrons) have been estimated. The analysis focuses on the discrimination of nuclear recoils, like those produced by hypothetical weakly interacting massive particles (WIMPs), against electron recoils, produced by β/γ radioactive background. [Copyright &y& Elsevier]
- Published
- 2009
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