Abstract
We report the first observation of the -decay chain. The emitters, [, ] and [, ], decaying into doubly magic were produced using a fusion-evaporation reaction , and identified with a recoil mass separator and an implantation-decay correlation technique. This is the first time radioactivity has been observed to a heavy self-conjugate nucleus. A previous benchmark for study of this fundamental decay mode has been the decay of into doubly magic . Enhanced proton-neutron interactions in the parent nuclei may result in superallowed decays with reduced -decay widths significantly greater than that for . From the decay chain, we deduce that the -reduced width for or is more than a factor of 5 larger than that for .
- Received 31 July 2018
- Revised 7 September 2018
DOI:https://doi.org/10.1103/PhysRevLett.121.182501
© 2018 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
The Fastest Alpha Emitter
Published 30 October 2018
The detection of unusually fast alpha emission from a heavy isotope could lead to new ways of testing the nuclear shell model.
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