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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 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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3. Novel Moessbauer experiment in a rotating system and the extra-energy shift between emission and absorption lines

Author

Y. Oktem, Metin Arik, Tolga Yarman, L.A. Susam, Oleg V. Missevitch, Alexander Kholmetskii, and Baki Akkuş

Subjects
Physics, Mössbauer effect, Absorption spectroscopy, 010308 nuclear & particles physics, Frame (networking), FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, General Physics (physics.gen-ph), Theory of relativity, Physics - General Physics, 0103 physical sciences, Mössbauer spectroscopy, Energy shift, Atomic physics, 010306 general physics
Abstract

We present the results of a novel Mossbauer experiment in a rotating system, implemented recently in Istanbul University, which yields the coefficient k=0.69+/-0.02 within the frame of the expression for the relative energy shift between emission and absorption lines dE/E=ku2/c2. This result turned out to be in a quantitative agreement with an experiment achieved earlier on the subject matter (A.L. Kholmetskii et al. 2009 Phys. Scr. 79 065007), and once again strongly pointed to the inequality k>0.5, revealed originally in (A.L. Kholmetskii et al. 2008 Phys. Scr. 77, 035302 (2008)) via the re-analysis of Kundig experiment (W. Kundig. Phys. Rev. 129, 2371 (1963)). A possible explanation of the deviation of the coefficient k from the relativistic prediction k=0.5 is discussed., 21 pages, 8 figures, 3 tables

Published
2015

4. Nuclear weak response from the combined study of beta-decay and charge-exchange reaction

Author

Y. FUJITA, B. RUBIO, W. GELLETLY, B. BLANK, T. ADACHI, A. ALGORA, P. ASCHER, R.B. CAKIRLI, G. DE FRANCE, J. GIOVINAZZO, S. GRÉVY, H. FUJITA, L. KUCUK, M. MARQUÉS, F. MOLINA, Y. OKTEM, F. DE OLIVEIRA SANTOS, L. PERROT, R. RAABE, P.C. SRIVASTAVA, G. SUSOY, A. TAMII, J.-C. THOMAS, 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), Grand Accélérateur National d'Ions Lourds (GANIL), 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), 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hadron, Nuclear Theory, Nuclear structure, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Key issues, 01 natural sciences, Good quantum number, Nuclear physics, Isospin, 0103 physical sciences, Mirror nuclei, Atomic physics, 010306 general physics, Nuclear Experiment, Charge exchange
Abstract

Studying the weak nuclear response, especially the Gamow-Teller (GT) transitions, of stable as well as unstable pf-shell nuclei, is one of the key issues in nuclear and astro-nuclear physics. We study the decay half-lives and the GT transitions starting from Tz = ±1 and ±2 mirror nuclei, respectively, by means of β decays and complementary hadronic (3 He , t) charge-exchange reactions. Under the assumption that isospin is a good quantum number, symmetry is expected for mirror nuclei and the GT transitions starting from the mirror nuclei. The half-lives and branching ratios and the measured strength distributions of GT transitions are compared and also combined for the understanding of the nuclear structure of pf-shell nuclei far-from-stability.

Published
2008
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