2024/12/20 by Thomas A. Stetz, Herwig Mayr, Stetz, T. +43
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Physics and Applications #Nuclear physics research studies
paper · pdf · doi:10.48550/arxiv.2501.01436
openalex publication_date 2024/12/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The M1 transition strengths between excited 2+ states of the neutron-rich, radioactive nuclide 132Te have been studied through direct lifetime measurements using the Doppler-shift attenuation method in a two-neutron transfer reaction on a 130Te target. An unambiguous identification of the lowest-lying mixed-symmetry 2+ state has been achieved on the basis of the large B(M1;2+2→2+1)=0.18(2) μN2 transition strength, in agreement with shell-model calculations. Results are compared to the shell model, and the analysis of both, data and calculations, unambiguously identifies the second-excited 2+ state of 132Te as the one-quadrupole phonon mixed-symmetry state of this isotope. A lowering of the energy and B(M1;2+ms→ 2+1) strength within the N=80 isotones toward the Z=50 shell closure is observed, which goes alongside with the lowering of the E2 collectivity approaching the magic proton shell.