Lowering the low-energy threshold of xenon detectors

Autor:	Sorensen, P., Angle, J., Aprile, E., Arneodo, F., Baudis, L., Bernstein, A., Bolozdynya, A., Brusov, P., Coelho, L. C. C., Dahl, C. E., DeViveiros, L., Ferella, A. D., Fernandes, L. M. P., Fiorucci, S., Gaitskell, R. J., Giboni, K. L., Gomez, R., Hasty, R., Kastens, L., Kwong, J., Lopes, J. A. M., Madden, N., Manalaysay, A., Manzur, A., McKinsey, D. N., Monzani, M. E., Ni, K., Oberlack, U., Orboeck, J., Plante, G., Santorelli, R., Santos, J. M. F. dos, Shagin, P., Shutt, T., Schulte, S., Winant, C., Yamashita, M.
Rok vydání:	2010
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Cosmology and Extragalactic Astrophysics High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	We show that the energy threshold for nuclear recoils in the XENON10 dark matter search data can be lowered to ~1 keV, by using only the ionization signal. In other words, we make no requirement that a valid event contain a primary scintillation signal. We therefore relinquish incident particle type discrimination, which is based on the ratio of ionization to scintillation in liquid xenon. This method compromises the detector's ability to precisely determine the z coordinate of a particle interaction. However, we show for the first time that it is possible to discriminate bulk events from surface events based solely on the ionization signal. Comment: Conference proceedings from the Identification of Dark Matter 2010, Montpellier, France. To be published by SISSA as PoS(IDM2010)017
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1011.6439 Zobrazit plný text záznamu View this record from Arxiv