
Pavel Golubev
Senior lecturer

Search for elements 119 and 120
Author
Summary, in English
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.
Department/s
- Nuclear physics
Publishing year
2020-12-02
Language
English
Publication/Series
Physical Review C
Volume
102
Issue
6
Full text
- Available as PDF - 382 kB
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Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Keywords
- superheavy elements
- element 119
- element 120
- Production cross section
Status
Published
Project
- Element 115
- Nuclear Structure at the Limits: Isotope-selective Spectroscopy
ISBN/ISSN/Other
- ISSN: 2469-9985