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

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

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aph....10..129o&link_type=abstract

Astroparticle Physics, Volume 10, Issue 1, p. 129-132.

Physics

2

Scientific paper

A detection method for UV-photons from Xe_2^* deexcitation with ~100% 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 background can be reduced by water shielding and by making the experiment deep underground. The body of a chamber 636 mm in diameter and 1000 mm long 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.

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