Isomers in neutron-rich A approx 190 nuclides from 208Pb fragmentation
| Autor: | K. Schmidt, Henryk Mach, J. Benlliure, M. Sawicka, C. Wheldon, D. D. Warner, Alison Bruce, M Rejmund, O. Yordanov, Philip M Walker, JG Narro, J. Giovinazzo, DC Gil, F. Vivés, Hans Geissel, C Fox, K. H. Schmidt, W. Gelletly, D. M. Cullen, Paul Stevenson, H. J. Wollersheim, Milena Mineva, Ani Aprahamian, P. H. Regan, W. Korten, Margareta Hellström, F {Rejmund}, J. Döring, F. de Oliveira, H. Grawe, C.D. O'Leary, S. C. Wooding, C. J. Pearson, M. Pfützner, A Kleinbohl, Robert Grzywacz, P. A. Butler, R. Lucas, T. Enqvist, P. Mayet, M. Lewitowicz, Zs. Podolyák, J. Gerl, Ch. Theisen, M. Górska, C Schlegel, H. Schaffner, M. Caamaño, Furong Xu |
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| Přispěvatelé: | 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), Institut de Physique Nucléaire d'Orsay (IPNO), 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), 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Physics
Nuclear and High Energy Physics Spectrometer Isotope 010308 nuclear & particles physics Hadron [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 01 natural sciences Ion Nuclear physics Fragmentation (mass spectrometry) Excited state 0103 physical sciences Neutron Nuclide Atomic physics 010306 general physics 21.10.Tg - Lifetimes. 23.20.Lv - γ transitions and level energies. 25.70.Mn - Projectile and target fragmentation |
| Zdroj: | European Physical Journal A European Physical Journal A, 2005, 23, pp.201-215. ⟨10.1140/epja/i2004-10079-7⟩ European Physical Journal A, EDP Sciences, 2005, 23, pp.201-215. ⟨10.1140/epja/i2004-10079-7⟩ |
| ISSN: | 1434-6001 1434-601X |
| Popis: | Relativistic projectile fragmentation of Pb-208 has been used to produce isomers in neutron-rich, A approximate to 190 nuclides. A forward-focusing spectrometer provided ion-by-ion mass and charge identification. The detection of gamma-rays emitted by stopped ions has led to the assignment of isomers in Ta-188, W-190, Re-192, Re-193, Os-195, Ir-197, Ir-198, Pt-200, Pt-201, Pt-202 and Au-203, with half-lives ranging from approximately 10 ns to 1 ms. Tentative isomer information has been found also for Er-174, Er-175, Hf-185, Re-191, Re-194 and Ir-199. In most cases, time-correlated, singles gamma-ray events provided the first spectroscopic data on excited states for each nuclide. In Pt-200 and Pt-201. the assignments are supported by gamma-gamma coincidences. Isomeric ratios provide additional information, such as half-life and transition energy constraints in particular cases. The level structures of the platinum isotopes are discussed, and comparisons are made with isomer systematics. |
| Databáze: | OpenAIRE |
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