Observation of the exotic nucleus145Tmvia its direct proton decay
Autor: | K. P. Rykaczewski, Chang-Hong Yu, J. C. Batchelder, C. Baktash, Dan Shapira, J. W. McConnell, Carl J Gross, J. McKenzie, E. F. Zganjar, Thomas Davinson, K. S. Toth, C. R. Bingham, X. J. Xu, S. D. Paul, W.T. Milner, William B. Walters, J. Mas, Philip Woods, T. N. Ginter, J. H. Hamilton, John P. Greene |
---|---|
Rok vydání: | 1998 |
Předmět: | |
Zdroj: | Physical Review C. 57:R1042-R1046 |
ISSN: | 1089-490X 0556-2813 |
Popis: | Proton emission from ${}^{145}\mathrm{Tm}$ was observed for the first time via the ${}^{92}\mathrm{Mo}{(}^{58}\mathrm{Ni},p4n)$ reaction, using the Holifield Radioactive Ion Beam Facility Recoil Mass Spectrometer in conjunction with a double-sided Si strip detector at the focal plane. The measured energy of the emitted proton is 1.728(10) MeV and its half-life is 3.5(10) \ensuremath{\mu}s, the shortest ever observed for ground-state proton radioactivity. When compared to the calculated WKB half-life for an $l=5$ transfer, the spectroscopic factor is 0.51(16), which is consistent with the value of 0.64 calculated via the BCS approximation for a spherical nucleus. Also, the half-life of ${}^{113}\mathrm{Cs}$ was determined with a greater precision than previously available to be 16.7(7) \ensuremath{\mu}sec. |
Databáze: | OpenAIRE |
Externí odkaz: |