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New Short-Lived Isotope 221U and the Mass Surface Near N=126

Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; Ackermann, D.; Andersson, L.-L.; Block, M.; Brand, H.; Cox, D. M.; Even, J. and Forsberg, Ulrika LU , et al. (2015) In Physical Review Letters 115(24).
Abstract
Two short-lived isotopes 221U and 222U were produced as evaporation residues in the fusion reaction 50Ti+176Yb at the gas-filled recoil separator TASCA. An α decay with an energy of Eα=9.31(5)  MeV and half-life T1/2=4.7(7)  μs was attributed to 222U. The new isotope 221U was identified in α-decay chains starting with Eα=9.71(5)  MeV and T1/2=0.66(14)  μs leading to known daughters. Synthesis and detection of these unstable heavy nuclei and their descendants were achieved thanks to a fast data readout system. The evolution of the N=126 shell closure and its influence on the stability of uranium isotopes are discussed within the framework of α-decay reduced width.
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publication status
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subject
keywords
Heavy Elements Shell Structure Sampling Electronics
in
Physical Review Letters
volume
115
issue
24
publisher
American Physical Society
external identifiers
  • pmid:26705628
  • wos:000366107500004
  • scopus:84949671163
ISSN
1079-7114
DOI
10.1103/PhysRevLett.115.242502
language
English
LU publication?
yes
id
c55c19a8-f00b-49fc-9cf1-7dcd56090715 (old id 8311218)
date added to LUP
2015-12-14 09:28:27
date last changed
2017-08-20 03:10:19
@article{c55c19a8-f00b-49fc-9cf1-7dcd56090715,
  abstract     = {Two short-lived isotopes 221U and 222U were produced as evaporation residues in the fusion reaction 50Ti+176Yb at the gas-filled recoil separator TASCA. An α decay with an energy of Eα=9.31(5)  MeV and half-life T1/2=4.7(7)  μs was attributed to 222U. The new isotope 221U was identified in α-decay chains starting with Eα=9.71(5)  MeV and T1/2=0.66(14)  μs leading to known daughters. Synthesis and detection of these unstable heavy nuclei and their descendants were achieved thanks to a fast data readout system. The evolution of the N=126 shell closure and its influence on the stability of uranium isotopes are discussed within the framework of α-decay reduced width.},
  articleno    = {242502},
  author       = {Khuyagbaatar, J. and Yakushev, A. and Düllmann, Ch. E. and Ackermann, D. and Andersson, L.-L. and Block, M. and Brand, H. and Cox, D. M. and Even, J. and Forsberg, Ulrika and Golubev, Pavel and Hartmann, W. and Herzberg, R.-D. and Heßberger, F. P. and Hoffmann, J. and Hübner, A. and Jäger, E. and Jeppsson, J. and Kindler, B. and Kratz, J. V. and Krier, J. and Kurz, N. and Lommel, B. and Maiti, M. and Minami, S. and Mistry, A. K. and Mrosek, Ch. M. and Pysmenetska, I. and Rudolph, Dirk and Sarmiento, Luis and Schaffner, H. and Schädel, M. and Schausten, B. and Steiner, J. and De Heidenreich, T. Torres and Uusitalo, J. and Wegrzecki, M. and Wiehl, N. and Yakusheva, V.},
  issn         = {1079-7114},
  keyword      = {Heavy Elements Shell Structure Sampling Electronics},
  language     = {eng},
  number       = {24},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {New Short-Lived Isotope 221U and the Mass Surface Near N=126},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.115.242502},
  volume       = {115},
  year         = {2015},
}