Abstract
A new -emitting isotope , produced by the fusion-evaporation reaction , was identified by employing the gas-filled recoil separator SHANS and the recoil- correlation technique. More precise -decay properties of even-even nuclei were also measured in the reactions of , beams with targets. By combining the experimental data, improved -decay reduced widths for the even-even Po-Pu nuclei in the vicinity of the magic neutron number are deduced. Their systematic trends are discussed in terms of the scheme in order to study the influence of proton-neutron interaction on decay in this region of nuclei. It is strikingly found that the reduced widths of are significantly enhanced by a factor of two as compared with the systematics for the and even-even nuclei. The abnormal enhancement is interpreted by the strong monopole interaction between the valence protons and neutrons occupying the and spin-orbit partner orbits, which is supported by the large-scale shell model calculation.
- Received 15 January 2021
- Revised 25 February 2021
- Accepted 5 March 2021
DOI:https://doi.org/10.1103/PhysRevLett.126.152502
© 2021 American Physical Society
Physics Subject Headings (PhySH)
synopsis
A Lightweight Among Heavyweights
Published 14 April 2021
Researchers have observed the lightest uranium isotope to date, offering insight into models of nuclear structure.
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