A method for background reduction in an experiment for WIMP search with a Xe(Ar)-liquid ionization chamber

Authors
Ovchinnikov, BM Parusov, VV
Citation
Bm. Ovchinnikov et Vv. Parusov, A method for background reduction in an experiment for WIMP search with a Xe(Ar)-liquid ionization chamber, ASTROPART P, 10(1), 1999, pp. 129-132
Citations number
24
Categorie Soggetti
Space Sciences
Journal title
ASTROPARTICLE PHYSICS
ISSN journal
09276505 → ACNP
Volume
10
Issue
1
Year of publication
1999
Pages
129 - 132
Database
ISI
SICI code
0927-6505(199901)10:1<129:AMFBRI>2.0.ZU;2-S
Abstract
A detection method for UV-photons from Xe-2* deexcitation with similar to 1 00% efficiency is proposed. This allows to distinguish reliably the Xe(Ar) recoil nuclei from background electrons. As a result of this the beta- and gamma-backgrounds will be suppressed practically completely. The neutron ba ckground can be reduced by water shielding and by making the experiment dee p underground. Thr body of a chamber 636 mm in diameter and 1000 mm lone is now prepared for this experiment. About 35-70 liters of liquid Xe will be used in this chamber. A background of about 10(-5) events (kg day)(-1) can be obtained in this experiment. (C) 1999 Elsevier Science B.V.