A Study in Garnet & Gold – Unveiling mysteries with the SE-SPS

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Presentation transcript:

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

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

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

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

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

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

3. End point of Novae nucleosynthesis 38K(p,g)39Ca via 40Ca(d,t)39Ca G. Christian, et al., Phys. Rev. C 97, 025802, 2018 Direct reaction with Dragon K. Setoodenhia et al., Phys. Rev. C 98, 055804, 2018 (3He,a) with SPS TUNL S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019

3. End point of Novae nucleosynthesis 38K(p,g)39Ca via 40Ca(d,t)39Ca G. Christian, et al., Phys. Rev. C 97, 025802, 2018 Direct reaction with Dragon K. Setoodenhia et al., Phys. Rev. C 98, 055804, 2018 (3He,a) with SPS TUNL Talk by J. Liang S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019

4. AGB stars: O-Na Anomaly A. Champagne, C. Iliadis, R. Longland, AIP Advances 4, 41006 (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, 065806 (2013) S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019

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

THANK YOU!! S. Almaraz-Calderon SE-SPS Workshop, Tallahassee FL 03/22/2019