# Investigation of double beta decay with the NEMO-3 detector 

A.S. Barabash, 1,$_{∗}$ V.B. Brudanin, 2 and NEMO Collaboration 

$^{1}$Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218 Moscow, Russia 

$^{2}$Joint Institute for Nuclear Research, 141980 Dubna, Russia 

## Abstract 

The double beta decay experiment NEMO 3 has been taking data since February 2003. The aim of this experiment is to search for neutrinoless (0 νββ ) decay and investigate two neutrino double beta decay in seven different isotopically enriched samples ( $^{100}$Mo, $^{82}$Se, $^{48}$Ca, $^{96}$Zr, $^{116}$Cd, $^{130}$Te and $^{150}$Nd). After analysis of the data corresponding to 3.75 y, no evidence for 0 νββ decay in the $^{100}$Mo and $^{82}$Se samples was found. The half-life limits at the 90% C.L. are 1 . 1 · 10 24 y and 3 . 6 · 10 23 y, respectively. Additionally for 0 νββ decay the following limits at the 90% C.L. were obtained, > 1 . 3 · 10 22 y for $^{48}$Ca, > 9 . 2 · 10 21 y for $^{96}$Zr and > 1 . 8 · 10 22 y for $^{150}$Nd. The 2 νββ decay half-life values were precisely measured for all investigated isotopes. 

PACS numbers: 23.40.-s, 14.60.Pq 

