TY  - JOUR
AU  - Guess, C. J. et al
AU  - Algora, A.
AU  - Estevez, E.
AU  - Molina, F.
AU  - Rubio, B.
PY  - 2011
DA  - 2011//
TI  - The Nd-150(He-3,t) and Sm-150(t,He-3) reactions with applications to beta beta decay of Nd-150
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 064318
EP  - 17pp
VL  - 83
IS  - 6
PB  - Amer Physical Soc
AB  - The Nd-150(3He,t) reaction at 140 MeV/u and Sm-150(t,He-3) reaction at 115 MeV/u were measured, populating excited states in Pm-150. The transitions studied populate intermediate states of importance for the (neutrinoless) beta beta decay of Nd-150 to Sm-150. Monopole and dipole contributions to the measured excitation-energy spectra were extracted by using multipole decomposition analyses. The experimental results were compared with theoretical calculations obtained within the framework of the quasiparticle random-phase approximation, which is one of the main methods employed for estimating the half-life of the neutrinoless beta beta decay (0 nu beta beta) of Nd-150. The present results thus provide useful information on the neutrino responses for evaluating the 0 nu beta beta and 2 nu beta beta matrix elements. The 2 nu beta beta matrix element calculated from the Gamow-Teller transitions through the lowest 1(+) state in the intermediate nucleus is maximally about half that deduced from the half-life measured in 2 nu beta beta direct counting experiments, and at least several transitions through 1+ intermediate states in Pm-150 are required to explain the 2 nu beta beta half-life. Because Gamow-Teller transitions in the Sm-150(t,3He) experiment are strongly Pauli blocked, the extraction of Gamow-Teller strengths was complicated by the excitation of the 2 (h) over bar omega, Lambda L = 0, Delta S = 1 isovector spin-flip giant monopole resonance (IVSGMR). However, the near absence of Gamow-Teller transition strength made it possible to cleanly identify this resonance, and the strength observed is consistent with the full exhaustion of the non-energy-weighted sum rule for the IVSGMR.
SN  - 0556-2813
UR  - http://arxiv.org/abs/1105.0677
UR  - https://doi.org/10.1103/PhysRevC.83.064318
DO  - 10.1103/PhysRevC.83.064318
LA  - English
N1  - ISI:000291729400001
ID  - Guess_etal2011
ER  -