Elsevier

Nuclear Physics A

Volume 543, Issue 3, 6 July 1992, Pages 589-612
Nuclear Physics A

Picosecond lifetime measurements and collective transition strengths in 128Ba

https://doi.org/10.1016/0375-9474(92)90281-NGet rights and content

Abstract

Mean lifetimes of 14 excited states in 128Ba populated via the 118Sn(13C, 3n) and 114Cd(18O, 4n) reactions were measured using the recoil-distance Doppler-shift (RDDS) technique and the pulsed- beam method. The differential decay-curve method (DDCM) was applied to extract the lifetimes from the experimental RDDS data. The nuclear deorientation effect on the transitions depopulating the 21+ and 41+ levels was measured and taken into account in the lifetime determination. The resulting B(E2) values in the ground-, gamma- and two-quasiproton bands are compared to theoretical predictions of collective models.

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    1

    Permanent address: Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, 1784 Sofia, Bulgaria.

    2

    Present address: Nuclear Research Center Demokritos, Athens, Greece.

    3

    Present address: Institut für Kernphysik der Kernforschungsanlage Jülich, D-5170 Jülich, Germany.

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