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A Study in Garnet & Gold – Unveiling mysteries with the SE-SPS
Sergio Almaraz-Calderon Florida State University Resonance reactions: Eres Jp G Sf Science with the SE-SPS and Workshop on transfer reactions Tallahassee, FL 03/22/2019
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Transfer reactions for nuclear astrophysics at FSU
1. Galactic 26Al (a,n) (a,g) (a,p) (n,g) b+,(n,p) (n,a) b-,(p,n) (p,g) (p,a) (g,p) (g,n) 26Al C. Iliadis, et al., Astrophys. J. Suppl. 193, 16 (2011) S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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Transfer reactions for nuclear astrophysics at FSU
1. Galactic 26Al (a,n) (a,g) (a,p) (n,g) b+,(n,p) (n,a) b-,(p,n) (p,g) (p,a) (g,p) (g,n) 26Al C. Iliadis, et al., Astrophys. J. Suppl. 193, 16 (2011) S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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The 26Al(n,p)26Mg and 26Al(n,a)23Na reactions using the SE-SPS at FSU
Transfer reactions for nuclear astrophysics at FSU 1. Galactic 26Al (a,n) (a,g) (a,p) (n,g) b+,(n,p) (n,a) b-,(p,n) (p,g) (p,a) (g,p) (g,n) 26Al The 26Al(n,p)26Mg and 26Al(n,a)23Na reactions using the SE-SPS at FSU 26Mg(3He,d) 25Mg(a,d) 24Mg(a,p) 26Al(d,p) High excitation energies on 27Al S(n) ~ 13 MeV Coincidence with a silicon detector array inside the SE-SPS reaction chamber S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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Transfer reactions for nuclear astrophysics at FSU
2. 44Ti in CCSN Magkotsios G, et al., Astrophys. J. Suppl. Ser. 191:66 (2010). 44Ti(a,p)47V 40Ca(a,g)44Ti S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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Transfer reactions for nuclear astrophysics at FSU
2. 44Ti in CCSN Magkotsios G, et al., Astrophys. J. Suppl. Ser. 191:66 (2010). 44Ti(a,p)47V this one is very difficult … 40Ca(a,g)44Ti Need to study resonances in 44Ti above the alpha threshold ~ 5.1 MeV 40Ca(a,a’) ?? Would need a very thin 40Ca target … or 40Ca(6Li,d)44Ti ?? Could be a good option S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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3. End point of Novae nucleosynthesis 38K(p,g)39Ca via 40Ca(d,t)39Ca
G. Christian, et al., Phys. Rev. C 97, , Direct reaction with Dragon K. Setoodenhia et al., Phys. Rev. C 98, , 2018 (3He,a) with SPS TUNL S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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3. End point of Novae nucleosynthesis 38K(p,g)39Ca via 40Ca(d,t)39Ca
G. Christian, et al., Phys. Rev. C 97, , Direct reaction with Dragon K. Setoodenhia et al., Phys. Rev. C 98, , 2018 (3He,a) with SPS TUNL Talk by J. Liang S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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4. AGB stars: O-Na Anomaly
A. Champagne, C. Iliadis, R. Longland, AIP Advances 4, (2014) “… star-to-star abundance variations in light-mass elements in all galactic globular clusters that are not predicted by standard stellar evolution models. In particular, there exists a pronounced anticorrelation between Na and O in the cluster stars that is not observed in field stars of similar evolutionary state.” 23Na(p,g)24Mg and 23Na(p,a)20Na reactions 23Na(p,p’) 23Na(p,a)20Na J.M. Cesaratto, et al., Phys. Rev. C 88, (2013) S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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Transfer reactions for nuclear astrophysics at FSU
For the general discussion … what would we need?? Targets .. Thin, Isotopically enriched (pure?) targets (Look out for contaminants) Need low thresholds! Need coincidence measurements to study resonances neutron, gamma, silicon arrays Focal plane detector for heavy ions Theory! S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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THANK YOU!! S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019
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