Author/Authors :
Belli، نويسنده , , P. and Bernabei، نويسنده , , R. and Cerulli، نويسنده , , R. and Dai، نويسنده , , C.J. and Danevich، نويسنده , , F.A. and Incicchitti، نويسنده , , A. and Kobychev، نويسنده , , V.V. and Ponkratenko، نويسنده , , O.A. and Prosperi، نويسنده , , D. and Tretyak، نويسنده , , VI. and Zdesenko، نويسنده , , Yu.G.، نويسنده ,
Abstract :
The performances of a CeF3 crystal scintillator with a mass of 49.3 g have been investigated. In particular, the α/β light ratio and the possibility of a pulse-shape discrimination between α particles and γ quanta have been studied. The radioactive contamination of the crystal has been investigated. The application of the obtained results in the search for rare processes such as the two neutrino double electron capture in 136Ce and 138Ce and the α activity in 142Ce has been investigated. As a result, new T1/2 limits for these processes have been determined (90% C.L.): T1/22ν2 K(136Ce)⩾2.7×1016 yr, T1/22ν2 K(138Ce)⩾3.7×1016 yr and T1/2α(142Ce)⩾2.9×1018 yr.
Keywords :
CeF3 crystal scintillator , ?/? Ratio , Pulse shape discrimination , ? decay , Ce isotopes , Double ? decay
