Movatterモバイル変換

• Casali, N.
;
• Nagorny, S. S.
;
• Orio, F.
;
• Pattavina, L.
;
• Beeman, J. W.
;
• Bellini, F.
;
• Cardani, L.
;
• Dafinei, I.
;
• Di Domizio, S.
;
• Di Vacri, M. L.
;
• Gironi, L.
;
• Kosmyna, M. B.
;
• Nazarenko, B. P.
;
• Nisi, S.
;
• Pessina, G.
;
• Piperno, G.
;
• Pirro, S.
;
• Rusconi, C.
;
• Shekhovtsov, A. N.
;
• Tomei, C.
;
• Vignati, M.

Abstract

We report on the first compelling observation of α decay of¹⁵¹Eu to the ground state of¹⁴⁷Pm. The measurement was performed using a 6.15 g Li₆Eu(BO₃)₃ crystal operated as a scintillating bolometer. The Q-value and half-life measured are: Q = 1948.9±6.9(stat.) ± 5.1(syst.) keV, and T_1/2 = (4.62 ± 0.95(stat.) ± 0.68(syst.)) × 10¹⁸ y. The half-life prediction of nuclear theory using the Coulomb and proximity potential model are in good agreement with this experimental result.