Isomers in neutron-rich A approx 190 nuclides from 208Pb fragmentation
- Caamano, M.
- M. Walker, P.
- H. Regan, P.
- Pfützner, M.
- Podolyák, Zs.
- Gerl, J.
- Hellström, M.
- Mayet, P.
- N. Mineva, M.
- Aprahamian, A.
- Benlliure, J.
- M. Bruce, A.
- A. Butler, P.
- Cortina Gil, D.
- M. Cullen, D.
- Döring, J.
- Enqvist, T.
- Fox, C.
- Garcés Narro, J.
- Geissel, H.
- Gelletly, W.
- Giovinazzo, J.
- Górska, M.
- Grawe, H.
- Grzywacz, R.
- Kleinböhl, A.
- Korten, W.
- Lewitowicz, M.
- Lucas, R.
- Mach, H.
- D. O'Leary, C.
- de Oliveira Santos, Francois
- J. Pearson, C.
- Rejmund, F.
- Rejmund, M.
- Sawicka, M.
- Schaffner, H.
- Schlegel, C.
- Schmidt, K.
- Schmidt, K.H.
- D. Stevenson, P.
- Theisen, Ch.
- Vivès, F.
- D. Warner, D.
- Wheldon, C.
- J. Wollersheim, H.
- Wooding, S.
- Xu, F.
- Yordanov, O.
DOIAbstract
PACSRelativistic projectile fragmentation of 208Pb has been used to produce isomers in neutron-rich, A appro 190 nuclides. A forward-focusing spectrometer provided ion-by-ion mass and charge identification. The detection of γ-rays emitted by stopped ions has led to the assignment of isomers in 188Ta, 190W, 192}Re, 193Re, 195Os, 197r, 198Ir, 200Pt, 201Pt, 202Pt and 203Au, with half-lives ranging from approximately 10 ns to 1 ms. Tentative isomer information has been found also for 174Er,175Er, 185Hf, 191Re, 194Re and 199Ir. In most cases, time-correlated, singles γ-ray events provided the first spectroscopic daa on excited states for each nuclide. In 200Pt and 201Pt, the assignments are supported by γ-γ coincidences. Isomeric ratios provide ...
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