The population of metastable states as a probe of relativistic-energy fragmentation reactions
- Denis Bacelar, A.M.
- Bruce, A.M.
- Podolyák, Zs.
- Al-Dahan, N.
- Górska, M.
- Lalkovski, S.
- Pietri, S.
- Ricciardi, M.V.
- Algora, A.
- Alkhomashi, N.
- Benlliure, J.
- Boutachkov, P.
- Bracco, A.
- Calore, E.
- Casarejos, E.
- Cullen, I.J.
- Deo, A.Y.
- Detistov, P.
- Dombradi, Zs.
- Domingo-Pardo, C.
- Doncel, M.
- Farinon, F.
- Farrelly, G.F.
- Geissel, H.
- Gelletly, W.
- Gerl, J.
- Goel, N.
- Grȩbosz, J.
- Hoischen, Robert
- Kojouharov, I.
- Kurz, N.
- Leoni, S.
- Molina, F.
- Montanari, D.
- Morales, A.I.
- Musumarra, A.
- Napoli, D.R.
- Nicolini, R.
- Nociforo, C.
- Prochazka, A.
- Prokopowicz, W.
- Regan, P.H.
- Rubio, B.
- Rudolph, Dirk
- Schmidt, K.-H.
- Schaffner, H.
- Steer, S.J.
- Steiger, K.
- Strmen, P.
- Swan, T.P.D.
- Szarka, I.
- Valiente-Dobón, J.J.
- Verma, S.
- Walker, P.M.
- Weick, H.
- Wollersheim, H.J.
DOIAbstract
Isomeric ratios have been measured for high-spin states in Po-198,200,206,208(84), At-208,209,210,211(85), Rn-210,211,212,213,214(86), Fr-208,211,212,213,214(87), Ra-210,211,212,214,215(88), and Ac-215(89) following the projectile fragmentation of a 1 AGeV U-238 beam by a Be-9 target at GSI Helmholtzzentrum fur Schwerionenforschung. The fragments were separated in the fragment separator (FRS) and identified by means of energy loss and time-of-flight techniques. They were brought to rest at the centre of the RISING gamma-ray detector array and intensities of gamma rays emitted in the decay of isomeric states with half-lives between 100 ns and 40 mu s and spin values up to 55/2 (h) over bar were used to obtain the corresponding isomeric ratio...
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