A1 Journal article (refereed)
Search for elements 119 and 120 (2020)

Khuyagbaatar, J., Yakushev, A., Düllmann, C. E., Ackermann, D., Andersson, L.-L., Asai, M., Block, M., Boll, R. A., Brand, H., Cox, D. M., Dasgupta, M., Derkx, X., Di Nitto, A., Eberhardt, K., Even, J., Evers, M., Fahlander, C., Forsberg, U., Gates, J. M., . . . Yakusheva, V. (2020). Search for elements 119 and 120. Physical Review C, 102(6), Article 064602. https://doi.org/10.1103/physrevc.102.064602

JYU authors or editors

Publication details

All authors or editors: Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; Ackermann, D.; Andersson, L.-L.; Asai, M.; Block, M.; Boll, R. A.; Brand, H.; Cox, D. M.; et al.

Journal or series: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Publication year: 2020

Publication date: 02/12/2020

Volume: 102

Issue number: 6

Article number: 064602

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/physrevc.102.064602

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/73027

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 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.

Keywords: nuclear physics

Free keywords: low and intermediate energy heavy-ion reactions

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2020

JUFO rating: 2