ÚTEF - Ústav technické a experimentální fyziky ČVUT - České vysoké učení technické v Praze
Česky English
ÚTEF - Ústav technické a experimentální fyziky ČVUT - České vysoké učení technické v Praze
ČVUT - České vysoké učení technické v Praze
Publikace  > 'The NEMO 3 experiment results'
The NEMO 3 experiment results

Autor

Rok
2006

Časopis
Proceedings of Science, PoS(HEP2005)167 (2006) pp. 167/1-167/4

Web


Obsah
The NEMO 3 detector, which is devoted to searching for neutrinoless double beta decay (0νββ), has been operating in the Fréjus Underground Laboratory in France since February 2003. Half-lives of the two-neutrino double beta decays (2νββ) have been measured for 100Mo and 82Se. After 389 days of data collection from February 2003 until September 2004, no evidence for neutrinoless double beta decay was found from 7 kg of 100Mo and 1 kg of 82Se. The corresponding lower limits for the half-lives are 4.6 × 1023 y at 90% C.L. for 100Mo and 1.0 × 1023 y at 90% C.L. for 82Se. Limits for the effective Majorana neutrino mass are 〈mν〉 < 0.66 – 2.81 eV for 100Mo and 〈mν〉 < 1.75 – 4.86 eV for 82Se. Radon was the dominant background and is now strongly suppressed by a radon-trapping facility, which has been in operation since October 2004. The expected sensitivity of the NEMO 3 experiment after five years of data collection will be T1/20νββ > 2 × 1024 y at 90% C.L. for 100Mo and 8.3 × 1023 y at 90% C.L. for 82Se, corresponding to 〈mν〉 < 0.3 – 1.3 eV and 〈mν〉 < 0.6 – 1.7 eV respectively.
Granty

Projekty


Příklad citace článku:
L. Vála, "The NEMO 3 experiment results", Proceedings of Science, PoS(HEP2005)167 (2006) pp. 167/1-167/4 (2006)

Hledat
10th Anniversary of IEAP