1. $\beta$-decay studies of neutron-rich K isotopes
- Author
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F. Perrot, F. Maréchal, C. Jollet, Ph. Dessagne, J.-C. Angélique, G. Ban, P. Baumann, F. Benrachi, U. Bergmann, C. Borcea, A. Buţă, J. Cederkall, S. Courtin, J.-M. Daugas, L. M. Fraile, S. Grévy, A. Jokinen, F. R. Lecolley, E. Liénard, G. Le Scornet, V. Méot, Ch. Miehé, F. Negoiţă, N. A. Orr, S. Pietri, E. Poirier, M. Ramdhane, O. Roig, I. Stefan, W. Wang, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département de Physique Théorique et Appliquée (DPTA), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
- Subjects
Physics ,Nuclear and High Energy Physics ,Decay scheme ,Isotope ,010308 nuclear & particles physics ,Astrophysics::High Energy Astrophysical Phenomena ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,23.40.-s, 23.20.Lv, 27.40.+z ,01 natural sciences ,Beta decay ,Double beta decay ,0103 physical sciences ,Neutron ,Atomic physics ,010306 general physics ,Delayed neutron ,Particle Physics - Experiment - Abstract
The \ensuremath{\beta} decay of the neutron-rich nuclei $^{51\ensuremath{-}53}\mathrm{K}$ has been used to populate bound and unbound states in $^{50\ensuremath{-}53}\mathrm{Ca}$. Measurements of \ensuremath{\gamma} rays as well as \ensuremath{\beta}-delayed neutrons enabled detailed decay schemes to be established and levels identified in ${}^{50\ensuremath{-}53}$Ca. A delayed one-neutron emission probability ${P}_{1n}$ of $63\ifmmode\pm\else\textpm\fi{}8$% was determined for the decay of $^{51}\mathrm{K}$. A total of seven new \ensuremath{\gamma} transitions were observed following the decay of $^{51}\mathrm{K}$, and 25 neutron branches were found that enrich the level scheme of $^{51}\mathrm{Ca}$. Delayed neutron emission probabilities of ${P}_{1n}=74.4\ifmmode\pm\else\textpm\fi{}9.3$% and ${P}_{2n}=2.3\ifmmode\pm\else\textpm\fi{}0.3$% were determined for the decay of $^{52}\mathrm{K}$, and 12 new \ensuremath{\gamma} transitions were observed in $^{50,51,52}\mathrm{Ca}$. Three new \ensuremath{\gamma} transitions were observed in $^{52,53}\mathrm{Ca}$ following the \ensuremath{\beta} decay of $^{53}\mathrm{K}$. New limits on the ${P}_{1n}$ and ${P}_{2n}$ values were determined for the \ensuremath{\beta} decay of $^{53}\mathrm{K}$, and a decay scheme was established for $^{53}\mathrm{Ca}$ for the first time. The data obtained here should help clarify the structure of neutron-rich $\mathit{fp}$-shell nuclei around the $N=32\text{\ensuremath{-}}34$ subshell closures.
- Published
- 2006
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