First evidence of multiple ß-delayed neutron emission for isotopes with A > 100

The beta-delayed neutron emission probability, P-n, of very neutron-rich nuclei allows us to achieve a better understanding of the nuclear structure above the neutron separation energy, S-n. The emission of neutrons can become the dominant decay process in neutron-rich astrophysical phenomena such a...

Descripción completa

Detalles Bibliográficos
Autores: Caballero-Folch, R., Dillmann, I., Agramunt Ros, Jorge, Tan, J.L., Domingo Pardo, César, Äystö, J., Calviño Tavares, Francisco|||0000-0002-7198-4639, Canete, L., Eronen, T., Ganioglu, E., Gelletly, W., Gorelov, D., Guadilla, V., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V.S., Koponen, J., Marta, M., Mendoza Cembrano, Emilio, Montaner Piza, A., Moore, I., Nobs, Ch., Orrigo, S., Penttila, H., Pohjalainen, I., Reinikainen, J., Riego Pérez, Albert|||0000-0001-8571-1546, Rinta-Antila, S., Rubio, B., Salvador Castiñeira, Paula Genoveva, Simutkin, V., Voss, A., Cortés Rossell, Guillem Pere|||0000-0002-3648-5826
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/105160
Acceso en línea:https://hdl.handle.net/2117/105160
https://dx.doi.org/10.5506/APhysPolB.48.517
Access Level:acceso abierto
Palabra clave:Neutrons
Àrees temàtiques de la UPC::Física
Àrees temàtiques de la UPC::Energies::Energia nuclear
Descripción
Sumario:The beta-delayed neutron emission probability, P-n, of very neutron-rich nuclei allows us to achieve a better understanding of the nuclear structure above the neutron separation energy, S-n. The emission of neutrons can become the dominant decay process in neutron-rich astrophysical phenomena such as the rapid neutron capture process (r-process). There are around 600 accessible isotopes for which beta-delayed one-neutron emission (beta 1n) is energetically allowed, but the branching ratio has only been determined for about one third of them. beta 1n decays have been experimentally measured up to the mass A similar to 1 5 0, plus a single measurement of Tl-210. Concerning two-neutron emitters (beta 2n), similar to 3 0 0 isotopes are accessible and only 24 have been measured so far up to the mass A = 100. In this contribution, we report recent experiments which allowed the measurement of beta 1n emitters for masses beyond A > 200 and N > 1 2 6 and identified the heaviest beta 2n emitter measured so far, Sb-136.

Similares en LA Referencia