T z = − 1 → 0 β decays of Ni 54 , Fe 50 , Cr 46 , and Ti 42 and comparison with mirror ( He 3 , t ) measurements
Year: 2015
Type: article
Abstract: We have studied the $\ensuremath{\beta}$ decay of the ${T}_{z}=\ensuremath{-}1,{f}_{7/2}$ shell nuclei $^{54}\mathrm{Ni},^{50}\mathrm{Fe},^{46}\mathrm{Cr}$, and $^{42}\mathrm{Ti}$ produced in fragmentation reactions. The proton separation energies in the daughter ${T}_{z}=0$ nuclei are relatively large $(\ensuremath{\approx}4$--5 MeV) so studies of the $\ensuremath{\gamma}$ rays are essential. The experiments were performed at GSI as part of the Stopped-beam campaign with the RISING setup consisting of 15 Euroball Cluster Ge detectors. From the newly obtained high precision $\ensuremath{\beta}$-decay half-lives, excitation energies, and $\ensuremath{\beta}$ branching ratios, we were able to extract Fermi and Gamow-Teller transition strengths in these $\ensuremath{\beta}$ decays. With these improved results it was possible to compare in detail the Gamow-Teller (GT) transition strengths observed in beta decay including a sensitivity limit with the strengths of the ${T}_{z}=+1$ to ${T}_{z}=0$ transitions derived from high resolution $({}^{3}\mathrm{He},t)$ reactions on the mirror target nuclei at RCNP, Osaka. The accumulated $B$(GT) strength obtained from both experiments looks very similar although the charge exchange reaction provides information on a broader energy range. Using the ``merged analysis'' one can obtain a full picture of the $B$(GT) over the full ${Q}_{\ensuremath{\beta}}$ range. Looking at the individual transitions some differences are observed, especially for the weak transitions. Their possible origins are discussed.
Source: Physical Review C
Authors: F. Molina, B. Rubio, Y. Fujita, W. Gelletly, J. Agramunt, A. Algora, J. Benlliure, P. Boutachkov, L. Cáceres, R. B. Cakirli, E. Casarejos, C. Domingo-Pardo, P. Doornenbal, A. Gadea, E. Ganioğlu, M. Gascón, H. Geissel, J. Gerl, M. Górska, J. Grȩbosz, R. Hoischen, R. Kumar, N. Kurz, I. Kojouharov, L. Amon Susam, H. Matsubara, A. I. Morales, Y. Oktem, D. Pauwels, D. Pérez-Loureiro, S. Pietri, Zs. Podolyák, W. Prokopowicz, D. Rudolph, H. Schaffner, S. J. Steer, J. L. Tain, A. Tamii, S. Tashenov, J. J. Valiente-Dobón, S. Verma, H-J. Wollersheim
Institutions: Universitat de València, Instituto de Física Corpuscular, Research Center for Nuclear Physics, The University of Osaka, The University of Osaka, University of Surrey, HUN-REN Institute for Nuclear Research, Hungarian Academy of Sciences, Universidade de Santiago de Compostela, GSI Helmholtz Centre for Heavy Ion Research, Universidad Autónoma de Madrid, Istanbul University, Karlsruhe Institute of Technology, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Comisión Chilena de Energía Nuclear, Institute of Nuclear Physics, Polish Academy of Sciences, Polish Academy of Sciences, Lund University, Inter-University Accelerator Centre, KU Leuven
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: Japan Society for the Promotion of Science London, European Commission, Ministry of Education, Culture, Sports, Science and Technology, Vetenskapsrådet, Ministerio de Ciencia e Innovación, Science and Technology Facilities Council, Japan Society for the Promotion of Science, Consejo Superior de Investigaciones Científicas
Awards: Study of Gamow-Teller Transitions Playing Important Roles In the Neutrino Nucleosynthesis, G1982145471, Nuclear Structure and Reactions: Theory and Experiment, Weak interaction processes in nuclei studied by means of strong interaction, G3310799266, G4398295089, Nuclear Structure and Reactions: Theory and Experiment, G5505541817, G5946451671, G8330281797, Nuclear structure and reactions: theory and experiment, G939737824
OpenAlex ID: W1512865331