Pavel Golubev
Senior lecturer
New Short-Lived Isotope 221U and the Mass Surface Near N=126
Author
Summary, in English
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.
Department/s
- Nuclear physics
Publishing year
2015
Language
English
Publication/Series
Physical Review Letters
Volume
115
Issue
24
Full text
- Available as PDF - 379 kB
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Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Keywords
- Heavy Elements
- Shell Structure
- Sampling Electronics
Status
Published
Project
- Nuclear Structure at the Limits: Isotope-selective Spectroscopy
Research group
- Nuclear Structure
ISBN/ISSN/Other
- ISSN: 1079-7114