Phys.Rev. C 85, 054313 (2012)

T.Marketin, G.Martinez-Pinedo, N.Paar, D.Vretenar

Role of momentum transfer in the quenching of Gamow-Teller strength

NUCLEAR REACTIONS ⁹⁰Zr(p, n), (n, p), E=300 MeV; analyzed differential cross section data; deduced pn-RQRPA strengths in β^- and β⁺ channels obtained with the Gamow-Teller (GT) operator, GT+IVSM operator, and full L=0 operator, momentum transfer. Relativistic Hartree-Bogoliubov model. Comparison with Ikeda sum rule.

NUCLEAR STRUCTURE ⁴⁸Ca, ⁹⁰Zr, ^{100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136,138,140,142,144,146,148,150}Sn, ²⁰⁸Pb; analyzed L=0 β^- strength functions, GT and IVSM centroids using Relativistic Hartree-Bogoliubov (RHB) plus proton-neutron relativistic quasiparticle random-phase approximation (pn-RQRPA) with GT operator, the GT plus isovector spin monopole (IVSM) mode term, and the operator that contains the full momentum-transfer dependence.

doi: 10.1103/PhysRevC.85.054313