Experimental Studies of Neutron-Deficient Gadolinium Isotopes. III. The Strange Case ofGd145g
- 1 January 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 3 (1), 282-295
- https://doi.org/10.1103/physrevc.3.282
Abstract
The rays emitted following the decay of 21.8-min have been studied using Ge(Li) and NaI(Tl) detectors in a variety of singles, anticoincidence, pair-coincidence, and two-dimensional ("megachannel") coincidence experiments. Of the rays attributed to this decay, 27 (accounting for >97% of the intensity) have been placed in a consistent decay scheme that includes 20 states in . All of the single-proton states between are seen (including the state populated directly by the decay of ), and the associated and transitions are accounted for quite well using simple shell-model arguments. In addition, we propose an explanation for the abrupt change in decay properties of the isotones that occurs at , viz., the lack of observable population directly to the ground state but 72.6% of its decay going to states at 1757.8 and 1880.6 keV. With a ground state for , these "fast" transitions can be represented as making the final states another example of three-quasiparticle states being populated by the decay of nuclei below .
Keywords
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