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Lopez-Martens, A.; Hauschild, K.; Dorvaux, O.; Briançon, Ch; Curien, D.; Désesquelles, P.; Gall, B.; Khalfallah, F.; Korichi, A.; Rousseau, Marc; Rowley, N.; Stuttgé, L.; Theisen, Ch
The European physical journal. A, Hadrons and nuclei, 06/2007, Letnik: 32Journal Article
Isomeric states in 253No have been investigated by conversion-electron and gamma-ray spectroscopy with the GABRIELA detection system. The 31 micro second isomer reported more than 30 years ago is found to decay to the ground state of 253No by the emission of a 167 keV 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.
