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First Results of the Ce-140(n,gamma)Ce-141 Cross-Section Measurement at n_TOF

Amaducci, Simone and Colonna, Nicola and Cosentino, Luigi and Cristallo, Sergio and Finocchiaro, Paolo and Massimi, Cristian and Mastromarco, Mario and Mazzone, Annamaria and Mengoni, Alberto and Valenta, Stanislav and Aberle, Oliver and Alcayne, Victor and Andrzejewski, Jozef and Audouin, Laurent and Babiano-Suarez, Victor and Bacak, Michael and Barbagallo, Massimo and Bennett, Samuel and Berthoumieux, Eric and Billowes, Jon and Bosnar, Damir and Brown, Adam and Busso, Maurizio and Caamano, Manuel and Caballero-Ontanaya, Luis and Calvino, Francisco and Calviani, Marco and Cano-Ott, Daniel and Casanovas, Adria and Cerutti, Francesco and Chiaveri, Enrico and Cortes, Guillem and Cortes-Giraldo, Miguel and Damone, Lucia-Anna and Davies, Paul-John and Diakaki, Maria and Dietz, Mirco and Domingo-Pardo, Cesar and Dressler, Rugard and Ducasse, Quentin and Dupont, Emmeric and Duran, Ignacio and Eleme, Zinovia and Fernandez-Dominguez, Beatriz and Ferrari, Alfredo and Furman, Valter and Goebel, Kathrin and Garg, Ruchi and Gawlik, Aleksandra and Gilardoni, Simone and Goncalves, Isabel and Gonzalez-Romero, Enrique and Guerrero, Carlos and Gunsing, Frank and Harada, Hideo and Heinitz, Stephan and Heyse, Jan and Jenkins, David and Junghans, Arnd and Kaeppeler, Franz and Kadi, Yacine and Kimura, Atsushi and Knapova, Ingrid and Kokkoris, Michael and Kopatch, Yuri and Kurtulgil, Deniz and Ladarescu, Ion and Lederer-Woods, Claudia and Leeb, Helmut and Lerendegui-Marco, Jorge and Lonsdale, Sarah-Jane and Macina, Daniela and Manna, Alice and Martinez, Trinitario and Masi, Alessandro and Mastinu, Pierfrancesco and Maugeri, Emilio-Andrea and Mendoza, Emilio and Michalopoulou, Veatriki and Milazzo, Paolo and Mingrone, Federica and Moreno-Soto, Javier and Musumarra, Agatino and Negret, Alexandru and Ogallar, Francisco and Oprea, Andreea and Patronis, Nikolas and Pavlik, Andreas and Piersanti, Luciano and Petrone, Cristina and Pirovano, Elisa and Porras, Ignacio and Praena, Javier and Quesada, Jose-Manuel and Ramos-Doval, Diego and Rauscher, Thomas and Reifarth, Rene and Rochman, Dimitri and Rubbia, Carlo and Sabate-Gilarte, Marta and Saxena, Alok and Schillebeeckx, Peter and Schumann, Dorothea and Sekhar, Adhitya and Smith, Gavin and Sosnin, Nikolay and Sprung, Peter and Stamatopoulos, Athanasios and Tagliente, Giuseppe and Tain, Jose and Tarifeno-Saldivia, Ariel and Tassan-Got, Laurent and Thomas, Benedikt and Torres-Sanchez, Pablo and Tsinganis, Andrea and Ulrich, Jiri and Urlass, Sebastian and Vannini, Gianni and Variale, Vincenzo and Vaz, Pedro and Ventura, Alberto and Vescovi, Diego and Vlachoudis, Vasilis and Vlastou, Rosa and Wallner, Anton and Woods, PhilipJohn and Wright, Tobias and Zugec, Petar. (2021) First Results of the Ce-140(n,gamma)Ce-141 Cross-Section Measurement at n_TOF. UNIVERSE, 7 (6). p. 200.

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Abstract

An accurate measurement of the Ce-140(n,gamma) energy-dependent cross-section was performed at the n_TOF facility at CERN. This cross-section is of great importance because it represents a bottleneck for the s-process nucleosynthesis and determines to a large extent the cerium abundance in stars. The measurement was motivated by the significant difference between the cerium abundance measured in globular clusters and the value predicted by theoretical stellar models. This discrepancy can be ascribed to an overestimation of the Ce-140 capture cross-section due to a lack of accurate nuclear data. For this measurement, we used a sample of cerium oxide enriched in Ce-140 to 99.4%. The experimental apparatus consisted of four deuterated benzene liquid scintillator detectors, which allowed us to overcome the difficulties present in the previous measurements, thanks to their very low neutron sensitivity. The accurate analysis of the p-wave resonances and the calculation of their average parameters are fundamental to improve the evaluation of the Ce-140 Maxwellian-averaged cross-section.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
e-ISSN:2218-1997
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:09 Aug 2021 15:13
Deposited On:09 Aug 2021 15:13

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