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Decay spectroscopy of an isomeric state in 251Md

Morse, C. ; Clark, Roderick M. ; Seweryniak, D. ; Appleton, C. J. ; Campbell, C. M. ; Carpenter, M. P. ; Chowdhury, P. ; Crawford, H. L. ; Cromaz, M. and Fallon, P. , et al. (2025) In Physical Review C 111(4).
Abstract
Excited states in 251Md have been populated by decay of an isomeric state at Ex ≈ 1174 keV and studied via delayed γ-ray spectroscopy. We observe the population of two rotational bands, one of which we identify as the Nilsson π7/2[514] ground-state band and the other we propose is based on the π9/2[624] configuration. From the observed decay pattern, we suggest that the isomer spin parity is 23/2+, with the three-quasiparticle configuration π7/2[514] ⊗ {ν7/2[624] ⊗ ν9/2[734]}Kπ=8− . We compare our results to theoretical predictions of the single- and multi-quasiparticle structure of 251Md.
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Decay spectroscopy, isomeric decays, Heavy elements, Gamma-ray spectroscopy
in
Physical Review C
volume
111
issue
4
article number
044320
pages
9 pages
publisher
American Physical Society
external identifiers
  • scopus:105003872305
ISSN
2469-9985
DOI
10.1103/PhysRevC.111.044320
project
Characterization of New Superheavy Elements
language
English
LU publication?
yes
id
8b344e9e-0ec6-4b11-9e87-a7ffbb7d8032
date added to LUP
2025-04-29 21:35:09
date last changed
2025-06-01 04:05:53
@article{8b344e9e-0ec6-4b11-9e87-a7ffbb7d8032,
  abstract     = {{Excited states in <sup>251</sup>Md have been populated by decay of an isomeric state at <i>E<sub>x</sub></i> ≈ 1174 keV and studied via delayed γ-ray spectroscopy. We observe the population of two rotational bands, one of which we identify as the Nilsson π7/2[514] ground-state band and the other we propose is based on the π9/2[624] configuration. From the observed decay pattern, we suggest that the isomer spin parity is 23/2<sup>+</sup>, with the three-quasiparticle configuration π7/2[514] ⊗ {ν7/2[624] ⊗ ν9/2[734]}<sub>Kπ=8−</sub> . We compare our results to theoretical predictions of the single- and multi-quasiparticle structure of <sup>251</sup>Md.}},
  author       = {{Morse, C. and Clark, Roderick M. and Seweryniak, D. and Appleton, C. J. and Campbell, C. M. and Carpenter, M. P. and Chowdhury, P. and Crawford, H. L. and Cromaz, M. and Fallon, P. and Favier, Z. and Huang, Tianheng and Kondev, F. G. and Korichi, A. and Lauritsen, T. and Potterveld, D. H. and Reviol, W and Rudolph, D. and Santamaria, C. and Savard, G. and Wilson, G. L. and Zhu, S.}},
  issn         = {{2469-9985}},
  keywords     = {{Decay spectroscopy; isomeric decays; Heavy elements; Gamma-ray spectroscopy}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{4}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Decay spectroscopy of an isomeric state in <sup>251</sup>Md}},
  url          = {{https://lup.lub.lu.se/search/files/218121154/PhysRevC.111.044320.pdf}},
  doi          = {{10.1103/PhysRevC.111.044320}},
  volume       = {{111}},
  year         = {{2025}},
}