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α Decay of High-K Isomers in 270Ds and 266Hs in a Superfluid Tunneling Model

Clark, R. M. and Rudolph, Dirk LU (2018) In Physical Review C 97(2).
Abstract
We use the superfluid tunneling model (STM) to calculate the half-lives of ground-state α decays of even-even superheavy nuclei (SHN) with Z≥100. The experimental data are reproduced to accuracies comparable to other contemporary models of α decay of SHN. We apply the STM to the case of the α decaying high-K isomers identified in the decay chains of 270Ds. By accounting for the α-decay Q values, Qα, the angular momentum difference between initial and final states, L, and a reduction in the pairing gap, Δ, we are able to reproduce the observed α decay of the isomers, including the unusual competition between L≈10 and L≈0 α branches seen for the K isomer in 270Ds... (More)
We use the superfluid tunneling model (STM) to calculate the half-lives of ground-state α decays of even-even superheavy nuclei (SHN) with Z≥100. The experimental data are reproduced to accuracies comparable to other contemporary models of α decay of SHN. We apply the STM to the case of the α decaying high-K isomers identified in the decay chains of 270Ds. By accounting for the α-decay Q values, Qα, the angular momentum difference between initial and final states, L, and a reduction in the pairing gap, Δ, we are able to reproduce the observed α decay of the isomers, including the unusual competition between L≈10 and L≈0 α branches seen for the K isomer in 270Ds (Z=110). (Less)
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author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
alpha decay, isomer decays, lifetimes & widths, nuclear structure and decays, superheavy elements
in
Physical Review C
volume
97
issue
2
article number
024333
pages
6 pages
publisher
American Physical Society
external identifiers
  • scopus:85042933184
ISSN
2469-9985
DOI
10.1103/PhysRevC.97.024333
project
Characterization of New Superheavy Elements
language
English
LU publication?
yes
id
23005020-b9ec-4beb-9f26-be7d855b96f0
date added to LUP
2018-03-05 15:53:05
date last changed
2020-12-29 01:16:25
@article{23005020-b9ec-4beb-9f26-be7d855b96f0,
  abstract     = {We use the superfluid tunneling model (STM) to calculate the half-lives of ground-state α decays of even-even superheavy nuclei (SHN) with <i>Z</i>≥100. The experimental data are reproduced to accuracies comparable to other contemporary models of α decay of SHN. We apply the STM to the case of the α decaying high-<i>K</i> isomers identified in the decay chains of <sup>270</sup>Ds. By accounting for the α-decay <i>Q</i> values, <i>Q</i>α, the angular momentum difference between initial and final states, <i>L</i>, and a reduction in the pairing gap, Δ, we are able to reproduce the observed α decay of the isomers, including the unusual competition between <i>L</i>≈10 and<i> L</i>≈0 α branches seen for the <i>K </i>isomer in <sup>270</sup>Ds (<i>Z</i>=110).},
  author       = {Clark, R. M. and Rudolph, Dirk},
  issn         = {2469-9985},
  language     = {eng},
  month        = {02},
  number       = {2},
  publisher    = {American Physical Society},
  series       = {Physical Review C},
  title        = {α Decay of High-<i>K</i> Isomers in <sup>270</sup>Ds and <sup>266</sup>Hs in a Superfluid Tunneling Model},
  url          = {https://lup.lub.lu.se/search/ws/files/39454266/PhysRevC.97.024333.pdf},
  doi          = {10.1103/PhysRevC.97.024333},
  volume       = {97},
  year         = {2018},
}