Tz=-1 → 0 β-Decays of 54Ni, 50Fe, 46Cr, and 42Ti and Comparison With Mirror (3He,t) Measurements

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title = "Tz=-1 → 0 β-Decays of 54Ni, 50Fe, 46Cr, and 42Ti and Comparison With Mirror (3He,t) Measurements",
abstract = "We have studied the β decay of the Tz=−1, f7/2 shell nuclei Ni54, Fe50, Cr46, and Ti42 produced in fragmentation reactions. The proton separation energies in the daughter Tz=0 nuclei are relatively large (≈4–5 MeV) so studies of the γ 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 β-decay half-lives, excitation energies, and β branching ratios, we were able to extract Fermi and Gamow-Teller transition strengths in these β 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 Tz=+1 to Tz=0 transitions derived from high resolution (3He,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 Qβ range. Looking at the individual transitions some differences are observed, especially for the weak transitions. Their possible origins are discussed.",
keywords = "beta decay, gamma-ray spectroscopy, RISING spectrometer, isospin symmetry",
author = "F. Molina and B. Rubio and Y. Fujita and W. Gelletly and J. Agramunt and A. Algora and J. Benlliure and P. Boutachkov and L. C{\'a}ceres and Cakirli, {R. B.} and E. Casarejos and C. Domingo-Pardo and P. Doornenbal and A. Gadea and E. Ganioğlu and M. Gasc{\'o}n and H. Geissel and J. Gerl and M. G{\'o}rska and J. Grȩbosz and Robert Hoischen and R. Kumar and N. Kurz and I. Kojouharov and Susam, {L. Amon} and H. Matsubara and Morales, {A. I.} and Y. Oktem and D. Pauwels and D. P{\'e}rez-Loureiro and S. Pietri and Zs. Podoly{\'a}k and W. Prokopowicz and Dirk Rudolph and H. Schaffner and Steer, {S. J.} and Tain, {J. L.} and A. Tamii and S. Tashenov and Valiente-Dob{\'o}n, {J. J.} and S. Verma and H-J. Wollersheim",
year = "2015",
doi = "10.1103/PhysRevC.91.014301",
language = "English",
volume = "91",
journal = "Physical Review C: covering nuclear physics",
issn = "2469-9985",
publisher = "American Physical Society",
number = "1",