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ILIAS

ILIAS. JRA2 - IDEA Integrated Double-beta-decay European Activity Working group 1. 3rd IDEA meeting Orsay, April, 14, 2005. Serge JULLIAN. 82 Se status : in progress. 1) 4th October Anatoly Tchetsov, head of the lab. Russian Research Center, Kurchatov Institute

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ILIAS

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  1. ILIAS JRA2 - IDEA Integrated Double-beta-decay European Activity Working group 1 3rd IDEA meeting Orsay, April, 14, 2005 Serge JULLIAN

  2. 82Se status : in progress • 1) 4th October Anatoly Tchetsov, head of the lab. • Russian Research Center, Kurchatov Institute • Leonid Sosnine, Kurchatov • Alexander Barabash, ITEP (Moscow), member of NEMO • Conclusions • It is possible to produce 2kg of 82Se 1 year, cost 120 k Euros • 82Se will be distilled at the end then the radiopurety could be better than before • The 82Se will be rent for a long period  agreement is needed • 2) Second meeting 5th October • A. Barabash, M. Danylov (director ITEP) agreement ITEP, IN2P3 • including 2kg 82Se for a long period • 3) Agreement signed on March 2005 M. Danylov - M. Spiro (Director IN2P3)

  3. 82Se radiopurety ? • Next tracko-calo detector requirements NEMO3 x 10 • 208Tl < 2 Bq/kg, 214Bi < 20 Bq/kg • F682Se 82Se 82Se • chemistry: distillation radiopurety ? • enough ? new way • HPGe measurements • 6 kg of 82Se will be better than 2 kg to improve the sensitivity and the next 4kg will be less expensive • (~ 20 %)

  4. 82Se production : presently * gas F6 Se : in progress * special run at the end of the enrichment to remove the remaining « heavy ions » * distillation to do the best ? * chemistry : in progress - see Dominique talk

  5. CONCLUSION 82Se programme • * 2 kg in progress • * radiopurety after distillation must be measured 6 kg ? • * agreement for the use for a long period : signed today • * future : a few 100 kg seems to be possible, • framework has to be studied S. Jullian, Orsay 14/04/2005

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