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Report No.

Isomeric decay studies around $$^{204}$$Pt and $$^{148}$$Tb

Podoly$'a$k, Zs.*; Steer, S. J.*; Pietri, S.*; Werner-Malento, E.*; Regan, P. H.*; Rudolph, D.*; Garnsworthy, A. B.*; Hoischen, R.*; G$'o$rska, M.*; Gerl, J.*; Wollersheim, H. J.*; Kurtukian-Nieto, T.*; Benzoni, G.*; Becker, F.*; Bednarczyk, P.*; Caceres, L.*; Doornenbal, P.*; Geissel, H.*; Gr$c{e}$bosz, J.*; Kelic, A.*; Kojouharov, I.*; Kurz, N.*; Montes, F.*; Prokopowicz, W.*; Saito, Takehiko*; Schaffner, H.*; Tashenov, S.*; Heinz, A.*; Pf$"u$tzner, M.*; Hellstr$"o$m, M.*; Jungclaus, A.*; Andersson, L.-L.*; Atanasova, L.*; Balabanski, D. L.*; Bentley, M. A.*; Blank, B.*; Blazhev, A.*; Brandau, C.*; Brown, J.*; Bruce, A. M.*; Camera, F.*; Catford, W. N.*; Cullen, I. J.*; Dombr$'a$di, Zs.*; Estevez, E.*; Fahlander, C.*; Gelletly, W.*; Ilie, G.*; Johansson, E. K.*; Jolie, J.*; Jones, G. A.*; Kmiecik, M.*; Kondev, F. G.*; Lalkovski, S.*; Liu, Z.*; Maj, A.*; Myalski, S.*; Shizuma, Toshiyuki; Simons, A. J.*; Schwertel, S.*; Walker, P. M.*; Wieland, O.*; Brown, B. A.*

Relativistic energy projectile fragmentation of $$^{208}$$Pb has been used to produce a range of exotic nuclei. The nuclei of interest were studied by detecting delayed $$gamma$$ rays following the decay of isomeric states. Experimental information on the excited states of the neutron-rich $$^{204}$$Pt N=126 nucleus, following internal decay of two isomeric states, was obtained for the first time. In addition, decays from the previously reported isomeric $$I=27hbar$$ and $$I=(49/2)hbar$$ states in $$^{148}$$Tb and $$^{147}$$Gd, respectively, have been observed. These isomeric decays represent the highest discrete states observed to date following a prejectile fragmentation reaction, and opens up the possibilty of doing "high-spin physics" using this technique.



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Category:Physics, Multidisciplinary



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