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.

Lederer-Woods C., Woods P.J., Davinson T., Estrade A., Heyse J., Kahl D., et al. (2021). Destruction of the cosmic γ -ray emitter Al 26 in massive stars: Study of the key Al 26 (n,α) reaction. PHYSICAL REVIEW C, 104(3), 1-5 [10.1103/PhysRevC.104.L032803].

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.
Writing – Review & Editing
;
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.
2021
Lederer-Woods C., Woods P.J., Davinson T., Estrade A., Heyse J., Kahl D., et al. (2021). Destruction of the cosmic γ -ray emitter Al 26 in massive stars: Study of the key Al 26 (n,α) reaction. PHYSICAL REVIEW C, 104(3), 1-5 [10.1103/PhysRevC.104.L032803].
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.; Andrze...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/873813
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