Isomeric decays in neutron-rich W, Os and Pt nuclei

Relativistic energy fragmentation of a 1 GeV/nucleon Pb-208 beam was used to populate a wide range of nuclei on both sides of the valley of beta-stability. The structure of these nuclei was studied by the identification of discrete gamma-ray transitions depopulating isomeric states with lifetimes in the nano- to millisecond range. Highlights of the experiment include the first observation of gamma-ray transitions in the neutron-rich nuclei (188)TA, W-190, Re-192, Os-195, Ir-197,Ir-198, Pt-201,Pt-202. The yrast states in W-190 and Pt-202 as well as the decay out from 10-20 ns isomers in Pt-202,Pt-201 and Os-195 are discussed. The observation of the previously reported isomeric K = 35/2 states in Hf-175, W-179 and Re-181 represents the highest discrete spin states observed to date following a projectile fragmentation reaction.

Caamano, M (författare)
Regan, PH (författare)
Walker, PM (författare)
Mayet, P (författare)
Gerl, J (författare)
Schlegel, C (författare)
Hellstrom, M (författare)
Mineva, MilenaLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)kosu-mmi (författare)
Pfutzner, M (författare)
KärnfysikFysiska institutionen (creator_code:org_t)

Av författaren/redakt...: Podolyak, Z; Caamano, M; Regan, PH; Walker, PM; Mayet, P; Gerl, J; visa fler...; Schlegel, C; Hellstrom, M; Mineva, Milena; Pfutzner, M; visa färre...

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