Final results of the Aurora experiment to study 2β decay of Cd116 with enriched

A. S. Barabash

¹

,

P. Belli

²

,

R. Bernabei

³

et al.

Initial State Interaction for the 20Ne + 130Te and 18O + 116Sn Systems at 15.3 AMeV from Elastic and Inelastic Scattering Measurements

“…The present work is part of the NUMEN experimental campaign carried out with 20 Ne and 18 O beams performed at the INFN-LNS at 15.3 AMeV incident energy. Among these, the 20 Ne + 76 Ge [32], 20 Ne + 116 Cd [16,33,34], 18 O + 76 Se [35], and 18 O + 40 Ca [17,36] systems were recently studied. Optical model and coupled-channel calculations are performed to describe the experimental cross-section angular distributions extracted for the elastic and some inelastic transitions.…”

“…A relevant conclusion of these studies is that an accurate description of the experimental data requires the inclusion of couplings with the low-lying excited states. In particular, the relevant couplings have the 2 + 1 states of the projectile and target and sometimes, as for example in the 18 O + 40 Ca case [36], also with the 3 − 1 . Here, we discuss new data for the elastic and inelastic scattering of the 20 Ne + 130 Te and 18 O + 116 Sn systems in the same theoretical framework of our previous works [32,[34][35][36].…”

“…Both target nuclei are involved in present 0νββ research. In particular, the 130 Te nucleus is a candidate for the 0νββ decay [38], and 116 Sn is the daughter nucleus for the ββ decay of the 116 Cd one [39,40]. As far as we know, no experimental measurements exist at ≈ 15 AMeV incident energy, and no theoretical analyses are present in the literature regarding the case of the 20 Ne + 130 Te system, although some works are focused on elastic scattering with the 20 Ne beam [41,42] or the 130 Te target [43,44].…”

Pairing properties of the double- β emitter Cd116

“…The double-β decay with the emission of neutrinos (2ν2β) of 116 Cd has been studied most recently by the NEMO-3 [8] and Aurora [9] experiments. The latter used enriched 116 CdWO 4 crystal scintillators and has the most precise measurement of the ground-state to ground-state 2ν2β half-life [T 1/2 = (2.63 +0.11 −0.12 ) × 10 19 yr] and set an improved limit on the 0ν2β decay of T 1/2 ≥ 2.2×10 23 yr. 116 Cd is also proposed as a candidate as part of a future multi-isotope bolometric experiment, the CUORE Upgrade with Particle IDentification, to search for 0ν2β [10].…”

Double Beta Decay Experiments With Loaded Liquid Scintillator

“…The [45]. The limits are recalculated from the updated half-life limits for 76 Ge [54], 82 Se [55], 116 Cd [14], and 130 Te [29].…”