MOON for neutrino-less ββ decays and ββ nuclear matrix elements
2009; American Institute of Physics; Linguagem: Inglês
10.1063/1.3266100
ISSN1935-0465
AutoresH. Ejiri, O. Civitarese, I. Štekl, J. Suhonen,
Tópico(s)Particle accelerators and beam dynamics
ResumoThe MOON project aims at spectroscopic 0vββ studies with the v‐mass sensitivity of 100–30 meV by measuring two beta rays from 100Mo and/or 82Se. The detector is a compact super‐module of multi‐layer PL scintillator plates. R&D works made by the pro to‐type MOON‐1 and the small PL plate show the possible energy resolution of around σ∼2.2%, as required for the mass sensitivity. Nuclear matrix elements M2v for 2vββ are shown to be given by the sum ΣLMk of the 2vββ matrix elements Mk through intermediate quasi‐particle states in the Fermi‐surface, where Mi is obtained experimentally by using the GT(Jπ = 1+) matrix elements of Mi(k) and Mf(k) for the successive single‐β transitions through the k‐th intermediate state.
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