Status on 82Se enrichment

IDEA meetingHeidelberg, October 21, 2004

S. Jullian, LAL-Orsay

PLAN

• 82Se programme: last meeting in COMO 8th April

• 82Se : status today

meetings in Moscow 4, 5 October

• Conclusion

CONCLUSION : COMO meeting 8th April

• Gas centrifuge OK but technical discussions are neededF6 X X

82Se is ``OK’’ 130Te ``OK’’• 150Nd no solution today

for a few Kg

cyclotron resonanceis the device for any

2 isotope• International level but Europe could be a motor CEA has the

know how

82Se program : COMO meeting 8th April

Aim : to produce 2 kg of 82Se very pure

• What is the radiopurety of F6 82Se ?• How to control the chemistry ?

F6 82Se 82SeIF NOT

then chemistry in INEEL (U.S)requirements

214Bi < 20 Bq/kg (1/10 NEMO3)200Tl < 2 Bq/kg (1/10 NEMO3)

schedule tentative≈ 1 year enrichment≈ 1 year chemistry

DataMonte-CarloRadonMonte-Carlo

82Se 932 g

216.4 days0.55 kg.y

NEMO3 June 2004 preliminary

Production of stable isotopes in RRC “Kurchatov Institute”

Fluorides, oxyfluorides,

Oxides,Carbonyls

Metal organics Rare gases

SiF4, SF6, GeF4, SeF6,

TeF6, MoF6, IrF6, WF6

CrO2F2, POF3,

Ni(PF3)4,

OsO4

Fe(CO3)5

CO2

Sn(CH3)4

Pb(CH3)4

Cd(CH3)2

Zn(CH3)2

Xe, Kr

Volatile compounds for centrifuge separationVolatile compounds for centrifuge separation

chlorideschlorides

TiClTiCl44

SiClSiCl33H, GeClH, GeCl44Ga(CHGa(CH33))33

Candidates to double beta decay

ECP, Zelenogorsk

SCP, Seversk

UCP, Novouralsk

EChPr, Lesnoi, EM

ECP, Nizhniy Novgorod

Sarov

Moscow, RRC “Kurchatov Institute”

ECP, St.Petersburg

ELP, Angarsk

Production of stable isotopes in RRC “Kurchatov Institute”

Location of main producers of stable isotopes in Russia

82Se status today

2 meetings in Moscow1) 4th October Anatoly Tchetsov, head of the lab.

Russian Research Center, Kurchatov InstituteLeonid Sosnine, KurchatovAlexander Barabash, ITEP (Moscow), member of

NEMOConclusions 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 OctoberA. Barabash, M. Danylov (director ITEP) agreement ITEP, IN2P3including 2kg 82Se for a long period will be signed

82Se radiopurety ?

• Next tracko-calo detector requirements NEMO3 x 10208Tl < 2 Bq/kg, 214Bi < 20 Bq/kg

• F6 82Se 82Se 82Se chemistry: distillation radiopurety ?

enough ? new way

• HPGe measurements6 kg of 82Se will be better than 2 kg to improve the sensitivity and the next 4kg will be less expensive

(~ 20 %)

CONCLUSION82Se programme possible

• 2kg - 1 year - 120 k Euros

• Radiopurety after distillation must be measured 6 kg ?

• Condition to get a reasonable cost and to avoid the customs problems (enriched materials are very expensive in the U.S): agreement for the use for a long period

• Future: a few100 kg seems to be possible

Thank you

S. Jullian, Heidelberg 21 October