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

Research output: Contribution to journalArticle

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.

Details

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
  • Robert 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
  • H. Schaffner
  • S. J. Steer
  • J. L. Tain
  • A. Tamii
  • S. Tashenov
  • J. J. Valiente-Dobón
  • S. Verma
  • H-J. Wollersheim
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics

Keywords

  • beta decay, gamma-ray spectroscopy, RISING spectrometer, isospin symmetry
Original languageEnglish
Article number014301
Number of pages19
JournalPhysical Review C (Nuclear Physics)
Volume91
Issue number1
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes

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Related research output

Rudolph, D., Hoischen, R., Hellström, M., Pietri, S., Podolyák, Z., Regan, P. H., Garnsworthy, A. B., Steer, S. J., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Gerl, J., Górska, M., Grebosz, J., Kojouharov, I., Kurz, N., Prokopowicz, W., Schaffner, H., Wollersheim, H. J. & 11 othersAndersson, L-L., Atanasova, L., Balabanski, D. L., Bentley, M. A., Blazhev, A., Brandau, C., Brown, J. R., Claes Fahlander, Johansson, E., Jungclaus, A. & Lenzi, S. M., 2008, In : Physical Review C (Nuclear Physics). 78, 2, 021301(R).

Research output: Contribution to journalArticle

Pietri, S., Regan, P. H., Podolyák, Z., Dirk Rudolph, Margareta Hellström, Andersson, L-L., Claes Fahlander & Johansson, E., 2007, In : Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 261, 1-2, p. 1079-1083

Research output: Contribution to journalArticle

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Related projects

Dirk Rudolph, Claes Fahlander, Pavel Golubev, Luis Sarmiento Pico, Anton Såmark-Roth, Daniel Cox, Ulrika Forsberg, Christian Lorenz, Natasa Lalovic, Natasa Lalovic, Ulrika Forsberg, Jnaneswari Gellanki, Robert Hoischen, Emma Johansson, Lise-Lotte Andersson, Rickard du Rietz, Jörgen Ekman & Corina Andreoiu

Kungliga Fysiografiska Sällskapet i Lund, Swedish Research Council

2002/01/012021/12/31

Project: Research

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Related activities

Rudolph, D. (Speaker)
2010 Aug 31

Activity: Talk or presentationInvited talk

Rudolph, D. (Chair)
20082009

Activity: Consultancy, expert advice and membershipsMember of board/committee/council etc

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