Molybdenum sample with mass of 1 kg, enriched in 100Mo at 99.5 %, is used to confirm or reject previous reports on observation of 2β2ν decay of 100Mo to the first excited 0^+_1 level of 100Ru (E_exc = 1130.5 keV). Data are collected in the low-background set-up with 4 HP Ge detectors, each of ~225 cm^3 volume, in the Gran Sasso underground laboratory of INFN (Italy). After more than 10000 h of measurements, number of events which are present in the coincidence spectrum corresponds to the half life value of T_1/2 = ~6 x 10^20 yr for 100Mo →100Ru* decay, in agreement with previous results. Further measurements are in progress.

Belli, P., Bernabei, R., Boiko, R.s., Cappella, F., Cerulli, R., Danevich, F.a., et al. (2008). PRELIMINARY RESULTS ON THE SEARCH FOR 100Mo 2β DECAY TO THE FIRST EXCITED 0^+_1 LEVEL OF 100Ru (ARMONIA EXPERIMENT). In Proceedings of the 2nd International Conference Current Problems in Nuclear Physics and Atomic Energy, June 9 - 15, 2008, Kyiv, UKRAINE (pp. 473-476). Kiyv : INR-Kiev.

PRELIMINARY RESULTS ON THE SEARCH FOR 100Mo 2β DECAY TO THE FIRST EXCITED 0^+_1 LEVEL OF 100Ru (ARMONIA EXPERIMENT)

BERNABEI R;d'Angelo S;
2008-01-01

Abstract

Molybdenum sample with mass of 1 kg, enriched in 100Mo at 99.5 %, is used to confirm or reject previous reports on observation of 2β2ν decay of 100Mo to the first excited 0^+_1 level of 100Ru (E_exc = 1130.5 keV). Data are collected in the low-background set-up with 4 HP Ge detectors, each of ~225 cm^3 volume, in the Gran Sasso underground laboratory of INFN (Italy). After more than 10000 h of measurements, number of events which are present in the coincidence spectrum corresponds to the half life value of T_1/2 = ~6 x 10^20 yr for 100Mo →100Ru* decay, in agreement with previous results. Further measurements are in progress.
2008
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Rilevanza internazionale
Articolo scientifico in atti di convegno
double beta decay; 100Mo;
http://www.kinr.kiev.ua/NPAE-Kyiv2008/proceedings/
Belli, P., Bernabei, R., Boiko, R.s., Cappella, F., Cerulli, R., Danevich, F.a., et al. (2008). PRELIMINARY RESULTS ON THE SEARCH FOR 100Mo 2β DECAY TO THE FIRST EXCITED 0^+_1 LEVEL OF 100Ru (ARMONIA EXPERIMENT). In Proceedings of the 2nd International Conference Current Problems in Nuclear Physics and Atomic Energy, June 9 - 15, 2008, Kyiv, UKRAINE (pp. 473-476). Kiyv : INR-Kiev.
Belli, P; Bernabei, R; Boiko, Rs; Cappella, F; Cerulli, R; Danevich, Fa; D'Angelo, S; Incicchitti, A; Kobychev, Vv; Kropivyansky, Bv; Laubenstein, M; Nagornyi, Pg; Nagorny, Ss; Nisi, S; Poda, Dv; Prosperi, D; Shkulkova, Og; Tretyak, Vi; Vyshnevskyi, Im; Yurchenko, Ss
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/221337
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