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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:22 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Short remarks on physics signals from dark matter in low temperature semiconductor detectors
Authors:
Ionel Lazanu*, Sorina Lazanu**
Affiliation:
* University of Bucharest, Faculty of Physics, POBox MG-11, Bucharest-Magurele, Romania
** National Institute for Materials Physics, POBox MG-7, Bucharest-Magurele, Romania
E-mail
ionel.lazanu@g.unobuc.ro, lazanu@infim.ro
Keywords:
dark matter, WIMP, neutrino, low temperature, semiconductors, phonons, defects
Abstract:
The search for dark matter has become a very active research area. There is evidence that a large part of the dark matter in the universe is non baryonic. Thus, the detection of low-energy nuclear recoils originating in neutrinos or Weakly Interacting Massive Particles (WIMPs) is the subject of a great experimental effort.
The difficulties involved in the development of detectors adequate for this task are multiple because the signal rate expected is generally very low (few counts per kg target per day or much less), the signal is in the range of keV or sub-keV region, requiring a low energy threshold, and this signal must be extracted from a dominant background.
In more actual experiments, ionization and phonon signals are measured simultaneously, trying to distinguish between electrons, nucleon/nuclei recoils from ordinary matter and constituents of the dark matter.
In this contribution we discuss the expected modifications on signals in detectors due to the production of defects in semiconductors, process present at all temperatures, but that is not taken into consideration in the usual analysis of experimental signals.
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