Double beta decay to excited states of daughter nuclei is poorely studied (even if evidence for the decay has been recently reported). Measurements were performed at Laboratori Nazionali del Gran Sasso with a germanium detector, by searching for the de-excitation gamma rays of the daughter nuclides. New lower limits on the half-lives for double beta decay of 150Nd to excited states of 150Sm have been obtained. They range between 6×1019 and 10×1019 years (90% C.L.). A further measurement on 6 kg of natural Nd is in progress, preliminary results and a detailed study of intrinsic radioactivity of the sample are presented.
Search for inclusive double beta decay of 150Nd to excited states of 150Sm at Laboratori Nazionali del Gran Sasso / C. Arpesella, E. Bellotti, E. Fiorini, L. Miramonti, P. P. Sverzellati. - In: NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. - ISSN 0920-5632. - 48:1(1996), pp. 247-250. ((Intervento presentato al 4. convegno TAUP : Theoretical and phenomenological aspect of underground physics tenutosi a Toledo nel 1995 [10.1016/0920-5632(96)00252-6].
Search for inclusive double beta decay of 150Nd to excited states of 150Sm at Laboratori Nazionali del Gran Sasso
L. MiramontiPenultimo
;
1996
Abstract
Double beta decay to excited states of daughter nuclei is poorely studied (even if evidence for the decay has been recently reported). Measurements were performed at Laboratori Nazionali del Gran Sasso with a germanium detector, by searching for the de-excitation gamma rays of the daughter nuclides. New lower limits on the half-lives for double beta decay of 150Nd to excited states of 150Sm have been obtained. They range between 6×1019 and 10×1019 years (90% C.L.). A further measurement on 6 kg of natural Nd is in progress, preliminary results and a detailed study of intrinsic radioactivity of the sample are presented.
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