1. V. Egorov

2. JINR + LSM V. Egorov =

3. The love story 1991 Orsay S.Jullian and D.Lalanne proposed to bring our 2β-spectrometer to Modane 1993 TGV

4. TGV-1 (1994 – 2000) Stack of 16 HPGe planar detectors  58mm (sensitive area = 12 cm 2 ) Total area of samples  100 cm 2 7 samples of nat Ca 8 samples of enriched 48 Ca: 1.08 g  1.3510 22 atoms CaCO 3 ( 41 mg/cm 2 ) NIM A372 (1996) 222

5. TGV-1 results T 1/2 (2  2 ) = =(2.9  7.5)10 19 y T 1/2 (2  0 )   1.510 21 y (90%CL) Zero

6. The love story 1994 We had produced one (of two) scintillator wall for the NEMO-2 Started to prepare NEMO-3

7. Participation of JINR in NEMO-3 6 tons of plastic scintillator (both internal and external walls) Big-dimensional Cu and Fe details of the sectors Fe shielding Enriched isotopes: 48 Ca 96 Zr 150 Nd Mounting, cabling, tuning, … Software for the data analysis Calibration, analysis

8. The love story 2000 Dramatic upgrade of TGV (TGV-2)

9. TGV-2 (2000 – …)

10. Stack of 32 HPGe planar detectors  60 mm (sensitive area : 20 cm 2 ) Total area of samples : 330 cm 2 Total mass of sample(s) : 10  20 g Total efficiency : 40  50 % E-resolution : 3  4 keV @ 60 Co LE-threshold : 40  50 keV (5  6 keV) 16 samples of 48 Ca (10 g) : 20 g CaF 2 + CH 2 ( 60 mg / cm 2 ) 16 samples of 106 Cd: 10 g Cd ( 30 mg / cm 2 )

11. Nuclei - candidates 0.187% 1.25% Purification procedure (ion-exchange technique). 20 g of 48Ca have been purified: k (Co, Ra, Eu) = (1.3  10)10 3 2 X-rays T 1/2 (5-forbidden  )

12. The love story 2005 E.Yakushev → EDELWEISS

13. Participation of JINR in EDELWIESS-2 Background environment control - Rn detector - Low-background n-detectors (internal background ≈ 0.4 counts per day) Assembling, commissioning, running (calibrations, tests, etc) Direct beta calibrations (MC and interpretation)

14. The love story 2005 Super-Heavy In Nature (SHIN) looking for multi-neutron events 2010 eka-Os → eka-Xe

15. The love story (be continued) NEMO → SuperNEMO (+BiPo) NEMO → SuperNEMO (+BiPo)calorimeter calibration system software

16. The love story (be continued) TGV 2010: finish 2EC of 106 Cd Search for Solar Axion with 57 Fe Low-threshold Ge detectors (coherent -e scattering, NMM, etc.) 2.9 – 3.0 keV threshold is not enough low… 250 g ~400 eV (→250 eV) 450 g stack Σ10 kg (TGV cryostat is perfectly suited for the low-background tests)

17. Relic neutrino?...