B(E2
A smooth onset of collectivity in Kr^(88,92,94,96) has been determined from reported B(E2; 2_(1)^(+) → 0_(1)^(+)) and E(2+ 1 ) values. This is in contrast to the sudden onset in even-even Zr, Mo, and Sr isotopes. Our objective was to complete the systematics by determining the B(E2; 2+ 1 → 0+ 1 ) va...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/33924 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/33924 |
| Access Level: | acceso abierto |
| Palabra clave: | 539.1 Física nuclear 2207 Física Atómica y Nuclear |
| Sumario: | A smooth onset of collectivity in Kr^(88,92,94,96) has been determined from reported B(E2; 2_(1)^(+) → 0_(1)^(+)) and E(2+ 1 ) values. This is in contrast to the sudden onset in even-even Zr, Mo, and Sr isotopes. Our objective was to complete the systematics by determining the B(E2; 2+ 1 → 0+ 1 ) value in Kr^(90), which was produced by cold-neutron-induced fission of 235U. The lifetime of the 2+ 1 state in Kr^(90) was measured via the electronic γ -γ timing technique using the EXILL and FATIMA spectrometers. Based on the measured mean lifetime of τ = 15(10) ps, the B(E2; 2_(1)^(+) → 0_(1)^(+)) value of 13^(+26)_(−5) W.u. in Kr^(90) is determined for the first time and the smooth onset of deformation in the even-even Kr isotopes beyond neutron number N = 50 is confirmed. |
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