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Neutron-deficient N approximate to 126 nuclei produced in U-238 fragmentation: Population of high-spin states

By Z Podolyak, J Gerl, M Hellstrom, F Becker, KA Gladnishki, M Gorska, A Kelic, Y Kopatch, S Mandal, PH Regan, KH Schmidt, PM Walker, HJ Wollersheim, A Banu, G Benzoni, H Boardman, E Casarejos, J Ekman, H Geissel, H Grawe, D Hohn, I Kojouharov, J Leske, R Lozeva, MN Mineva, G Neyens, RD Page, CJ Pearson, M Portillo, D Rudolph, N Saito, H Schaffner, D Sohler, K Summerer, JJ Valiente-Dobon, C Wheldon, H Weick and M Winkler


The population of metastable states produced in relativistic-energy fragmentation of a U-238 beam has been measured. For states with high angular momentum, I=17h and I=21.5h, a higher population than expected has been observed, with the discrepancy increasing with angular momentum. By considering two sources for the angular momentum, related to single-particle and collective motions, a much improved description of the experimental results can be obtained. In addition, new results on the structure of Fr-208, Ra-211 and Ac-216 are reported

Year: 2006
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