Measurement of 73 Ge(n,γ) cross sections and implications for stellar nucleosynthesis

Ge(n,γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT=30 keV is 1.5 to 1.7 times higher than most theoretical predi...

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Detalles Bibliográficos
Autores: Lederer-Woods, C., Battino, U., Ferreira, P., Gawlik, A., Guerrero, C., Gunsing, F., Heinitz, S., Lerendegui-Marco, J., Mengoni, A., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Andrzejewski, Józef, Audouin, L., Bécares, V., Bacak, M., Balibrea, Javier, Barbagallo, M., Barros, S., Be¿vá¿, F., Beinrucker, C., Belloni, F., Berthoumieux, Eric, Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortés, Guillem, Cortés-Giraldo, Miguel Antonio, Cosentino, L., Damone, L.A., Deo, K., Diakaki, Maria, Dietz, M., Domingo Pardo, César, Dressler, R., Dupont, E., Durán, Ignacio, Fernández-Domínguez, B., Ferrari, A., Finocchiaro, P., García, A.R., González-Romero, E., Hernández-Prieto, A., Leal-Cidoncha, E., Martínez, T., Mendoza, E., Palomo-Pinto, F.R., Paradela, Cristina, Porras, J.I., Praena, J., Quesada, J.M., Riego-Perez, A., Robles, M., Sabaté-Gilarte, M., Taín, José Luis, Tarifeño-Saldivia, A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/196454
Acceso en línea:http://hdl.handle.net/10261/196454
Access Level:acceso abierto
Palabra clave:s process
Nucleosynthesis
Neutron capture
Germanium
n_TOF
Descripción
Sumario:Ge(n,γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT=30 keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of Ge produced in stars, which would explain the low isotopic abundance of Ge in the solar system.

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