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

Molina, F.; Rubio, B.; Fujita, Y.; Gelletly, W.; Agramunt, J.; Algora, A.; Benlliure, J.; Boutachkov, P.; Cáceres, L. and Cakirli, R. B., et al. (2015) In Physical Review C (Nuclear Physics) 91(1).
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... (More)
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. (Less)
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Physical Review C (Nuclear Physics)
volume
91
issue
1
publisher
American Physical Society
external identifiers
  • wos:000347924300002
  • scopus:84928593206
ISSN
0556-2813
DOI
10.1103/PhysRevC.91.014301
language
English
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yes
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1c815c55-a1b6-4b86-a3a5-e63f6d691b18 (old id 4924728)
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http://link.aps.org/doi/10.1103/PhysRevC.91.014301
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2015-01-10 11:37:01
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2017-07-09 03:22:43
@article{1c815c55-a1b6-4b86-a3a5-e63f6d691b18,
  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.},
  articleno    = {014301},
  author       = {Molina, F. and Rubio, B. and Fujita, Y. and Gelletly, W. and Agramunt, J. and Algora, A. and Benlliure, J. and Boutachkov, P. and Cáceres, L. and Cakirli, R. B. and Casarejos, E. and Domingo-Pardo, C. and Doornenbal, P. and Gadea, A. and Ganioğlu, E. and Gascón, M. and Geissel, H. and Gerl, J. and Górska, M. and Grȩbosz, J. and Hoischen, Robert and Kumar, R. and Kurz, N. and Kojouharov, I. and Susam, L. Amon and Matsubara, H. and Morales, A. I. and Oktem, Y. and Pauwels, D. and Pérez-Loureiro, D. and Pietri, S. and Podolyák, Zs. and Prokopowicz, W. and Rudolph, Dirk and Schaffner, H. and Steer, S. J. and Tain, J. L. and Tamii, A. and Tashenov, S. and Valiente-Dobón, J. J. and Verma, S. and Wollersheim, H-J.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Tz=-1 → 0 β-Decays of 54Ni, 50Fe, 46Cr, and 42Ti and Comparison With Mirror (3He,t) Measurements},
  url          = {http://dx.doi.org/10.1103/PhysRevC.91.014301},
  volume       = {91},
  year         = {2015},
}