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New Short-Lived Isotope 221U and the Mass Surface Near N=126
- Source :
- Physical Review Letters; 115(24), no 242502 (2015); ISSN: 1079-7114
- Publication Year :
- 2015
-
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.
Details
- Database :
- OAIster
- Journal :
- Physical Review Letters; 115(24), no 242502 (2015); ISSN: 1079-7114
- Notes :
- application/pdf, English
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1023430030
- Document Type :
- Electronic Resource