Study of isomeric states in 198,200,202,206Pb and 206Hg populated in fragmentation reactions

Nataša Lalović, Dirk Rudolph, Zsolt Podolyák, Luis Sarmiento Pico, E.C. Simpson, T. Alexander, M.L. Cortés, J. Gerl, Pavel Golubev, F. Ameil, T. Arici, Ch. Bauer, D. Bazzacco, M. A. Bentley, P. Boutachkov, M. Bowry, Claes Fahlander, A. Gadea, Jnaneswari Gellanki, A. GivechevN. Goel, M. Gorska, A. Gottardo, E. Gregor, G. Guastalla, T. Habermann, M. Hackstein, A. Jungclaus, I. Kojouharov, R. Kumar, N. Kurz, M. Lettmann, C. Lizarazo, C. Louchart, E. Merchán, C. Michelagnoli, Th. Moeller, K. Moschner, Z. Patel, N. Pietralla, S. Pietri, D. Ralet, M. Reese, P.H. Regan, P. Reiter, H. Schaffner, P. Singh, C. Stahl, R. Stegmann, O. Stezowski, the AGATA Collaboration

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Isomeric states in isotopes in the vicinity of doubly-magic 208Pb were populated following reactions of a relativistic 208Pb primary beam impinging on a 9Be fragmentation target. Secondary beams of 198,200,202,206Pb and 206Hg were isotopically separated and implanted in a passive stopper positioned in the focal plane of the GSI Fragment Separator. Delayed γ rays were detected with the Advanced Gamma Tracking Array (AGATA). Decay schemes were re-evaluated and interpreted with shell-model calculations. The momentum-dependent population of isomeric states in the two-nucleon hole nuclei 206Pb/206Hg was found to differ from the population of multi neutron-hole isomeric states in 198,200,202Pb.
Antal sidor27
TidskriftJournal of Physics G: Nuclear and Particle Physics
StatusPublished - 2018 feb. 12

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