Neutron destruction reactions of the cosmic γ-ray emitter Al26 are of importance to determine the amount of Al26 ejected into our galaxy by supernova explosions and for Al26 production in asymptotic giant branch stars. We performed a new measurement of the Al26(n,α) reaction up to 160-keV neutron energy at the neutron time-of-flight facilities n_TOF at CERN and GELINA at EC-JRC. We provide strengths for ten resonances, six of them for the first time. We use our data to calculate astrophysical reactivities for stellar temperatures up to 0.7 GK. Our results resolve a discrepancy between the two previous direct measurements of this reaction, and indicate higher stellar destruction rates than the most recently recommended reactivity.

Destruction of the cosmic γ -ray emitter Al 26 in massive stars: Study of the key Al 26 (n,α) reaction

Lo Meo S.;Manna A.;Massimi C.;Mingrone F.;
2021

Abstract

Neutron destruction reactions of the cosmic γ-ray emitter Al26 are of importance to determine the amount of Al26 ejected into our galaxy by supernova explosions and for Al26 production in asymptotic giant branch stars. We performed a new measurement of the Al26(n,α) reaction up to 160-keV neutron energy at the neutron time-of-flight facilities n_TOF at CERN and GELINA at EC-JRC. We provide strengths for ten resonances, six of them for the first time. We use our data to calculate astrophysical reactivities for stellar temperatures up to 0.7 GK. Our results resolve a discrepancy between the two previous direct measurements of this reaction, and indicate higher stellar destruction rates than the most recently recommended reactivity.
PHYSICAL REVIEW C
Lederer-Woods C.; Woods P.J.; Davinson T.; Estrade A.; Heyse J.; Kahl D.; Lonsdale S.J.; Paradela C.; Schillebeeckx P.; Aberle O.; Amaducci S.; Andrzejewski J.; Audouin L.; Bacak M.; Balibrea J.; Barbagallo M.; Becvar F.; Berthoumieux E.; Billowes J.; Bosnar D.; Brown A.; Caamano M.; Calvino F.; Calviani M.; Cano-Ott D.; Cardella R.; Casanovas A.; Cerutti F.; Chen Y.H.; Chiaveri E.; Colonna N.; Cortes G.; Cortes-Giraldo M.A.; Cosentino L.; Cristallo S.; Damone L.A.; Diakaki M.; Domingo-Pardo C.; Dressler R.; Dupont E.; Duran I.; Fernandez-Dominguez B.; Ferrari A.; Ferreira P.; Ferrer F.J.; Finocchiaro P.; Furman V.; Gobel K.; Garcia A.R.; Gawlik A.; Gilardoni S.; Glodariu T.; Goncalves I.F.; Gonzalez-Romero E.; Griesmayer E.; Guerrero C.; Gunsing F.; Harada H.; Heinitz S.; Jenkins D.G.; Jericha E.; Kappeler F.; Kadi Y.; Kalamara A.; Kavrigin P.; Kimura A.; Kivel N.; Kokkoris M.; Krticka M.; Kurtulgil D.; Leal-Cidoncha E.; Leeb H.; Lerendegui-Marco J.; Lo Meo S.; Macina D.; Manna A.; Marganiec J.; Martinez T.; Masi A.; Massimi C.; Mastinu P.; Mastromarco M.; Maugeri E.A.; Mazzone A.; Mendoza E.; Mengoni A.; Milazzo P.M.; Mingrone F.; Musumarra A.; Negret A.; Nolte R.; Oprea A.; Patronis N.; Pavlik A.; Perkowski J.; Porras I.; Praena J.; Quesada J.M.; Radeck D.; Rauscher T.; Reifarth R.; Rubbia C.; Ryan J.A.; Sabate-Gilarte M.; Saxena A.; Schumann D.; Sedyshev P.; Smith A.G.; Sosnin N.V.; Stamatopoulos A.; Tagliente G.; Tain J.L.; Tarifeno-Saldivia A.; Tassan-Got L.; Valenta S.; Vannini G.; Variale V.; Vaz P.; Ventura A.; Vlachoudis V.; Vlastou R.; Wallner A.; Warren S.; Weiss C.; Wright T.; Zugec P.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/873813
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