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SUMMARY:New method of Kr-85 reduction in low-background detectors.
DTSTART;VALUE=DATE-TIME:20151007T123000Z
DTEND;VALUE=DATE-TIME:20151007T124500Z
DTSTAMP;VALUE=DATE-TIME:20260916T185206Z
UID:indico-contribution-354@cern.ch
DESCRIPTION:Speakers: Dmitry Akimov (ITEP and MEPhI)\, Grigory Simakov (IT
 EP)\nKrypton-85 is a technogenic beta-radioactive isotope which produces b
 ackground in a low-energy region in dark matter and neutrino detectors: in
  noble gas detectors\, especially in liquid Xenon detectors\, in organic l
 iquid scintillator detectors.\nWe propose a new method of reduction of the
  85Kr isotope in a detector medium based on adding to the detector medium 
 a Krypton sample depleted of the 85Kr isotope and subsequent reduction of 
 the Kr content down to the initial or even lower level with the use of exi
 sting methods of purification. This method works because the residual natu
 ral Kr is diluted in the depleted one and is removed together with it from
  Xe since both of them have the same thermodynamic properties.\nA test cel
 l for measurement of the activity of the depleted Kr has been assembled an
 d the radioactivity of the 25-year-old Krypton has been measured. The meas
 ured activity (56 ± 5 Bq/g) recalculated to the air the air activity due 
 to 85Kr decays in the year 1990 (1.20 ± 0.10 Bq/m3) is close to the data 
 on the air activity at that time.\n\nhttps://indico.particle.mephi.ru/even
 t/2/contributions/354/
LOCATION:Milan Hotel 4* Verdi
URL:https://indico.particle.mephi.ru/event/2/contributions/354/
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