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Search for elements 119 and 120

Khuyagbaatar, J. ; Yakushev, A. ; Düllmann, Ch. E. ; Ackermann, D. ; Andersson, L.-L. ; Asai, M. ; Block, M. ; Boll, R.A. ; Brand, H. and Cox, D. M. , et al. (2020) In Physical Review C 102(6).
Abstract
A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the 50Ti+249Bk and 50Ti+249Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the 249Bk target partially decayed into 249Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the 50Ti+249Bk and 50Ti+249Cf reactions, respectively, at a midtarget beam energy of Elab = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the... (More)
A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the 50Ti+249Bk and 50Ti+249Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the 249Bk target partially decayed into 249Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the 50Ti+249Bk and 50Ti+249Cf reactions, respectively, at a midtarget beam energy of Elab = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
superheavy elements, element 119, element 120, Production cross section
in
Physical Review C
volume
102
issue
6
article number
064602
pages
9 pages
publisher
American Physical Society
external identifiers
  • scopus:85100124980
ISSN
2469-9985
DOI
10.1103/PhysRevC.102.064602
project
Element 115
Nuclear Structure at the Limits: Isotope-selective Spectroscopy
language
English
LU publication?
yes
id
14c0d0b7-47e4-4d84-bc6f-5041943579d5
date added to LUP
2020-12-17 18:26:37
date last changed
2022-05-24 03:11:40
@article{14c0d0b7-47e4-4d84-bc6f-5041943579d5,
  abstract     = {{A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the <sup>50</sup>Ti+<sup>249</sup>Bk and <sup>50</sup>Ti+<sup>249</sup>Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the <sup>249</sup>Bk target partially decayed into <sup>249</sup>Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the <sup>50</sup>Ti+<sup>249</sup>Bk and <sup>50</sup>Ti+<sup>249</sup>Cf reactions, respectively, at a midtarget beam energy of E<sub>lab</sub> = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.}},
  author       = {{Khuyagbaatar, J. and Yakushev, A. and Düllmann, Ch. E. and Ackermann, D. and Andersson, L.-L. and Asai, M. and Block, M. and Boll, R.A. and Brand, H. and Cox, D. M. and Dasgupta, M. and Derkx, X. and Di Nitto, A. and Eberhardt, K. and Even, J. and Evers, M. and Fahlander, C. and Forsberg, U. and Gates, J. M. and Gharibyan, N. and Golubev, P. and Gregorich, K. E. and Hamilton, J. H. and Hartmann, W. and Herzberg, R.-D. and Heßberger, F. P. and Hinde, D. J. and Hoffmann, J. and Hollinger, R. and Hübner, A. and Jäger, E. and Kindler, B. and Kratz, J.V. and Krier, J. and Kurz, N. and Laatiaoui, M. and Lahiri, S. and Lang, R. and Lommel, B. and Maiti, M. and Miernik, K. and Minami, S. and Mistry, A. K. and Mokry, C. and Nitsche, H. and Omtvedt, J. P. and Pang, G. K. and Papadakis, P. and Renisch, D. and Roberto, J. B. and Rudolph, D. and Runke, J. and Rykaczewski, K. P. and Sarmiento Pico, Luis and Schädel, M. and Schausten, B. and Semchenkov, A. and Shaughnessy, D. A. and Steinegger, P. and Steiner, J. and Tereshatov, E. E. and Thörle-Pospiech, P. and Tinschert, K. and Torres De Heidenreich, T. and Trautmann, N. and Türler, A. and Uusitalo, J. and Wegrzecki, M. and Wiehl, N. and Van Cleve, S. M. and Yakusheva, V.}},
  issn         = {{2469-9985}},
  keywords     = {{superheavy elements; element 119; element 120; Production cross section}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{6}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Search for elements 119 and 120}},
  url          = {{https://lup.lub.lu.se/search/files/88163108/PhysRevC.102.064602.pdf}},
  doi          = {{10.1103/PhysRevC.102.064602}},
  volume       = {{102}},
  year         = {{2020}},
}