Diapositive 1

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Integrated Large Infrastructures for
Astroparticle Science
N4 - Double beta Network
Dominique Lalanne, Blaubeuren, July 3rd 2007
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N4 Deliverables at the end of 3rd year 1
Deliverable Final report on background
issues CNRS (CENBG, IReS, LAL, LPC), INFN
(Milano), MPI(Heidelberg), Leiden,
UCL comments levels of background due to
remaining radioactivity low enough to reach the
expected sensitivity of the future experiments
SuperNEMO, GERDA, CUORE 2 Deliverable
Recommendations on the most appropriate
techniques CNRS (CENBG, LAL), INFN (Milano),
MPI(Heidelberg) comments recommendation to make
the three types of experiments on double beta,
germanium, bolometer, tracko-calo 3 Deliverable
updating of isotope databate CNRS (CENBG,
LAL), INFN (Milano) comments no new input in
third year (37.5 kg of germanium included last
year, 1.5 kg of selenium for year 4)
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4 Deliverable First report on Laser isotope
separation Possible production of enriched
Nd150 CNRS (LAL) comments real opportunity at
MENPHIS, France for Nd150. Discussion in
progress at Commissariat à lEnergie Atomique
(CEA) 5 Deliverable Report on conclusions on
matrix element computation and selected isotopes
Jyväskylä Univ., Tübingen Univ., Bratislava
Univ. comments list of recent progress and new
inputs to be taken into account in future
calculations
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Month number 36 corresponds to April 2007
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(No Transcript)
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Integrated Large Infrastructures for
Astroparticle Science
ILIAS-JRA2

• Production of enriched Selenium
• 2 kilos  ITEP-Kurchatov 
• recent delivery 1.5 kilos from Tomsk

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1.5 kg from Tomsk
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May 11th, 2007 arrival of 1.5 kg of enriched
Selenium 82 from Tomsk via Chemgas Serge Jullian,
Xavier Sarazin, Dominique Lalanne,
Pierre-Alexandre The enriched selenium is
powder in four plastic boxes inside the four wood
boxes
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Deliverable purified Selenium by chemistry
INL (Idaho) 1 kg of Se82 done by
distillation Kurchatov 1 kg of Se
(nat.) done IChHPS (Russia) 1.250 kg of Se
(nat.) done Conclusion a lot of
measurements to be done on Germanium detectors in
LSM
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Natural Selenium from Nijni Novgorod, Russia. May
24, 2007 Left, before purification, right after
4-times vacuum distillation
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Purified seleniumin its bottle of quartz
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• Remaining work to be done
• Measurements of all the samples
• conclusions to be drawn on
• the choice of the place for enrichment of Se
• The method of purification to reach the mBq/kg

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New chair persons for ILIAS
N4 chair Christine Marquet deputy Xavier
Sarazin
JRA2, enrichment and purification
chair Corinne Augier