| Autor: |
Sonzogni, A.A., Walters, W.B., Chowdhury, P., Ayangeakaa, A.D., Greene, J.P., Harker, J.L., Zhu, S., Yanez, R., Chiara, C.J., Lauritsen, T., Lister, C.J., Loveland, W., McCutchan, E.A., Carpenter, M.P., Janssens, R.V.F., Amro, B.M.S., Barrett, J.S. |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| DOI: |
10.17615/v4ww-4n15 |
| Popis: |
States in Tl209 were populated using a multinucleon transfer reaction with a Xe136 beam impinging on a thick Pb208 target at E=785 MeV. The beam was pulsed at 825-ns intervals in order to perform isomer decay spectroscopy. The known Jπ=17/2+ isomer in Tl209 was located at 1228(4) keV and measured to have a half-life of T1/2=146(10) ns. A second isomer with Jπ=13/2+ was found to have T1/2=14(5) ns. The previously suggested low-energy X and Y transitions were found to have energies 57(2) and 47(2) keV respectively, while the measurement of conversion coefficients and a new decay path make the spin assignments below the isomers experimentally firm. Correlating the delayed γ transitions with the prompt beam flash allowed the decay of states above the isomer to be found. The longer-lived isomer represents full alignment of the simplest two-particle, one-hole configuration and illuminates the remarkably weak coupling of the proton hole to the Pb210 core. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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