The (3He, n) reaction on tellurium isotopes

Valence neutron properties relevant to the neutrinoless double-βdecay of130Te

“…Large cross sections for neutron-pair transfer to excited states are evidence of pair vibrations, and a break down of the BCS approximation. For the Te isotopes, the proton-pair adding ( 3 He,n) reaction is clear evidence that for protons the simple BCS approximation is not valid in this region of nuclei [21]. However, for neutrons, in the measurement reported here on 132 Xe, shown in Fig.…”

0+states inXe130,132: A search for E(5) behavior

“…• cated that both l =0 and l =2 states occur at an energy of 2.13 ± 0.10 MeV [20]. In addition, it was concluded from recent Coulomb excitation measurements that the level is a 2 + state, based on the observation of a γ ray to the ground state [6].…”

“…This calculation reverses the energy order of the excited 0 + states, such that the 0 Further problems with the E(5) comparison arise when examining transfer reaction data. We noted earlier that the 2017-keV 0 + state in 130 Xe is populated strongly in the ( 3 He,n) two-proton transfer reaction [20] with 39% of the population of the ground state, indicating that this state has a complex structure. Similar 0 + states have been observed in the lighter even-mass Xe isotopes [24] and have been interpreted as the main fragment of the proton pairing vibrational band.…”

Proton pair correlations and the neutrinoless double-βdecay of76Ge

“…This is well illustrated by pair transfer studies on the 0ν2β candidate 130 Te. No evidence is found from (p, t) reactions for pair vibrations in neutron-pair removal [5], but the protonpair adding ( 3 He,n) measurements populated excited 0 + states carrying ∼40% of the ground state strength [6]. The 0ν2β decay candidate 76 Ge has attracted considerable interest.…”