1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

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