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4 results on '"Y. Oktem"'

1. Half-life determination of Tz = -1 and Tz = - $ {\frac{{1}}{{2}}}$ 1 2 proton-rich nuclei and the $ \beta$ β decay of 58Zn

Author

W. Gelletly, Y. Fujita, B. Blank, P. Ascher, L. Kucuk, Riccardo Raabe, F. de Oliveira Santos, L. Perrot, G. Susoy, T. Adachi, F. Molina, E. Ganioglu, J. C. Thomas, F. M. Marqués, J. Giovinazzo, A. Montaner-Pizá, Y. Oktem, Berta Rubio, P. C. Srivastava, S. E. A. Orrigo, Alejandro Algora, Hisanori Fujita, R. B. Cakirli, Atsushi Tamii, and S. Grévy

Subjects
Physics, Nuclear and High Energy Physics, Decay scheme, Isotopes of germanium, Proton, 010308 nuclear & particles physics, Isotopes of copper, Hadron, Analytical chemistry, Half-life, 7. Clean energy, 01 natural sciences, Beta decay, 0103 physical sciences, Atomic physics, 010306 general physics, Radioactive decay
Abstract

We have measured the $ \beta$ -decay half-lives of 16 neutron-deficient nuclei with $ T_{z} = -1/2$ and -1 , ranging from chromium to germanium. They were produced in an experiment carried out at GANIL and optimized for the production of$^{58}$Zn , for which in addition we present the decay scheme and absolute Fermi and Gamow-Teller transition strengths. Since all of these nuclei lie on the rp -process pathway, the $ T_{1/2}$ values are important ingredients for the rp -process reaction flow calculations and for models of X-ray bursters.

Published
2017
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2. Beta Decay Study of the Tz=−2 56Zn Nucleus and the Determination of the Half-Lives of a Few fp-shell Nuclei

Author

B. Rubio, S.E.A. Orrigo, L. Kucuk, A. Montaner-Pizá, Y. Fujita, H. Fujita, B. Blank, W. Gelletly, T. Adachi, J. Agramunt, A. Algora, P. Ascher, B. Bilgier, L. Cáceres, R.B. Cakirli, G. de France, E. Ganioğlu, M. Gerbaux, J. Giovinazzo, S. Grevy, O. Kamalou, H.C. Kozer, T. Kurtukian-Nieto, F.M. Marqués, F. Molina, Y. Oktem, F. de Oliveira Santos, L. Perrot, L. Popescu, R. Raabe, A.M. Rogers, P.C. Srivastava, G. Susoy, T. Suzuki, A. Tamii, and J.C. Thomas

Subjects
Physics, Nuclear and High Energy Physics, Decay scheme, Nuclear Theory, Nuclear data, Half-life, Beta decay, Nuclear physics, medicine.anatomical_structure, Fragmentation (mass spectrometry), Double beta decay, medicine, Mirror nuclei, Atomic physics, Nuclear Experiment, Nucleus
Abstract

This paper concerns the experimental study of the β decay properties of few proton-rich fp -shell nuclei. The nuclei were produced at GANIL in fragmentation reactions, separated with the LISE spectrometer and stopped in an implantation detector surrounded by Ge detectors. The β -delayed gammas, β -delayed protons and the exotic β -delayed gamma-proton emission have been studied. Preliminary results are presented. The decay of the T z = − 2 nucleus 56 Zn has been studied in detail. Information from the β -delayed protons and β -delayed gammas has been used to deduce the decay scheme. The exotic beta-delayed gamma-proton decay has been observed for the first time in the fp -shell. The interpretation of the data was made possible thanks to the detailed knowledge of the mirror Charge Exchange (CE) process and the gamma de-excitation of the states in 56 Co, the mirror nucleus of 56 Cu.

Published
2014
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3. Beta Decay Studies of Proton Rich Nuclei, an Important Ingredient for rp-Process Calculations

Author

B. Rubio, L. Kucuk, S. E. A. Orrigo, Y. Fujita, W. Gelletly, B. Blank, T. Adachi, P. Aguilera, J. Agramunt, A. Algora, P. Ascher, B. Bilgier, L. Cáceres, R. B. Cakirli, G. de France, F. de Oliveira Santos, H. Fujita, E. Ganioğlu, M. Gerbaux, J. Giovinazzo, S. Grévy, O. Kamalou, H. C. Kozer, T. Kurtukian-Nieto, M. Marqués, F. Molina, D. Nishimura, H. Oikawa, Y. Oktem, L. Perrot, L. Popescu, R. Raabe, A. M. Rogers, P. C. Srivastava, G. Susoy, C. Stodel, T. Suzuki, A. Tamii, J. C. Thomas, Instituto de Fisica Corpuscular ( IFIC ), Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ) -Universitat de València ( UV ), Istanbul University, Research Center for Nuclear Physics ( RCNP ), Osaka University [Osaka], Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Centre d'Etudes Nucléaires de Bordeaux Gradignan ( CENBG ), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Istambul University, Grand Accélérateur National d'Ions Lourds ( GANIL ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -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 ) -Ecole 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 ), Department of Physics, Tokyo University of Science, Noda, Chiba, Laboratoire de psychologie de Caen Normandie ( LPCN ), Normandie Université ( NU ) -Normandie Université ( NU ), Centre d'Etude de l'Energie Nucléaire ( SCK-CEN ), Argonne National Laboratory (ANL) - Physics Division (PHY), Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), Research Center for Nuclear Physics (RCNP), University of Surrey (UNIS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-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), Centre d'Etude de l'Energie Nucléaire (SCK-CEN), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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
Proton, 010308 nuclear & particles physics, Chemistry, Radiochemistry, rp-process, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Beta decay, Nuclear physics, Ingredient, 0103 physical sciences, beta decay experiments, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, fragmentation facilities
Abstract

International audience; We have performed a series of beta-decay experiments at fragmentation facilities on T$_z$ = −1/2, T$_z$ = −1, and T$_z$ = −2 nuclei. Most of these nuclei lie on the rp-process path and therefore some of the quantities we have measured such as T$_{1/2}$ values are important ingredients in performing reaction flow calculations for light curve estimates and testing astrophysical models of X-ray bursters. At this conference we have presented the results of measurements of T$_{1/2}$ values for 25 nuclei and compared with previous values.

Published
2016
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4. Tz=−1→0βdecays ofNi54,Fe50,Cr46, andTi42and comparison with mirror(He3,t)measurements

Author

D. Pauwels, J. L. Tain, J. J. Valiente-Dobón, Hiroshi Matsubara, P. Doornenbal, A. Algora, S. Pietri, S. Verma, A. I. Morales, D. Pérez-Loureiro, M. Gascon, F. Molina, W. Gelletly, J. Grȩbosz, H. J. Wollersheim, Robert Hoischen, Atsushi Tamii, Rajesh Kumar, Yoshitaka Fujita, Stanislav Tashenov, E. Ganioglu, P. Boutachkov, H. Schaffner, L. Amon Susam, Y. Oktem, A. Gadea, C. Domingo-Pardo, B. Rubio, S. J. Steer, W. Prokopowicz, Hans Geissel, Enrique Casarejos, I. Kojouharov, L. Caceres, J. Agramunt, J. Benlliure, Dirk Rudolph, R. B. Cakirli, N. Kurz, M. Górska, Zs. Podolyák, and J. Gerl

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), High resolution, Gamma spectroscopy, Sensitivity limit, Atomic physics, Beta decay, Excitation, Charge exchange, Fermi Gamma-ray Space Telescope
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. (Less)

Published
2015
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