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Isomeric states in 253No |
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| Authors: | A Lopez-Martens K Hauschild A V Yeremin O Dorvaux A V Belozerov Ch Briançon M L Chelnokov V I Chepigin D Curien P Désesquelles B Gall V A Gorshkov M Guttormsen F Hanappe A P Kabachenko F Khalfallah A Korichi A C Larsen O N Malyshev A Minkova Yu Ts Oganessian A G Popeko M Rousseau N Rowley R N Sagaidak S Sharo A V Shutov S Siem L Stuttgé A I Svirikhin N U H Syed Ch Theisen |
| Institution: | (1) CSNSM, IN2P3-CNRS, UMR8609, F-91405, France;(2) FLNR, JINR, Dubna, Russia;(3) IPHC-DRS, ULP, IN2P3-CNRS, F-67037 Strasbourg, France;(4) Université Paris-Sud, F-91405 Orsay, France;(5) Department of Physics, Oslo University, 0316 Oslo, Norway;(6) Université Libre de Bruxelles, 1050 Bruxelles, Belgium;(7) Faculty of Physics, University of Sofia, 1164 Sofia, Bulgaria;(8) INRNE, BAS, Sofia, Bulgaria;(9) Department of Physics, Comenius University, SK-84215 Bratislava, Slovakia;(10) CEA-Saclay, DSM/DAPNIA/SPhN, 91191 Gif-sur-Yvette, France |
| Abstract: | Isomeric states in 253No have been investigated by conversion electron and γ -ray spectroscopy with the GABRIELA detection system. The 31μs isomer reported more than 30 years ago is found to decay to the ground state of 253No by the emission of a 167keV M2 transition. The spin and parity of this low-lying isomeric state are established to be 5/2+ . The presence of another longer-lived isomeric state is also discussed. |
| Keywords: | 21 10 -k Properties of nuclei nuclear energy levels 21 10 Tg Lifetimes 23 20 Lv γ transitions and level energies 23 20 Nx Internal conversion and extranuclear effects |
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