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NucleoSynthesis of Galactic 26 Al 25 Al+p Resonances Peter Parker, Yale University Catherine Deibel, Rachel Lewis, Anuj Parikh, Christopher Wrede Jac Caggiano, Jason Clark. ORNL - 23 Oct.’06. 26 Al (1809 keV) map of our Galaxy GRO-Comptel. 25 Al Branch Point :. - PowerPoint PPT Presentation
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NucleoSynthesis of Galactic 26Al
25Al+p Resonances
Peter Parker, Yale UniversityCatherine Deibel, Rachel Lewis, Anuj Parikh, Christopher Wrede
Jac Caggiano, Jason Clark
ORNL - 23 Oct.’06
26Al (1809 keV) map of our GalaxyGRO-Comptel
24Mg 25Mg Mg*26
25Al26 g.s.Al
26S i
26 mAl
Mg26 g.s.
1.809-
MeV ray
(p,)26Si()26mAl()26MgGS24Mg(p,)25Al
()25Mg(p,)26Al()26*Mg(26MgGS
25Al Branch Point:
25Al(p,)26Si Resonance Searches: 29Si(3He,6He)26Si (Caggiano)
24Mg(3He,n)26Si (Parpottas)
28Si(p,t)26Si (Bardayan)
[ 26Al(3He,t)26Si(p)25Al ] (Yale)
TRIUMF E1071 (C. Deibel)
TRIUMF DRAGON E922 (A. Chen)Direct Measurement:
29Si(3He,6He)27Si (Yale): Caggiano, et al. Phys.Rev.C 65,055801(2002)
24Mg(3He,n)26Si (Ohio Univ.): Parpottas, et al. Phys.Rev.C 70,065805(2004).
28Si(p,t)26Si (ORNL): Bardayan, et al. Phys.Rev.C 74,045804(2006).
28Si(p,t)26Si (ORNL): Bardayan, et al. Phys.Rev.C 74,045804(2006).
25Al(p,)26Si: Parpottas, et al. Phys.Rev.C 73,049907(E) (2006).
26Al Implanted Target: (TRIUMF-ISAC Proposal E1071)
HRMS 41010 26Al/sec at an energy of 51 keV
1017 26Al/cm2 rastered into a 3-mm diameter circle in 4 to 7 days, into a 40 μg/cm2 carbon foil Contamination: About 1 to 10% 26Na(-)26Mg,But no 27Al
With this target, in conjunction with the Yale split-pole spectrograph and the YLSA silicon array,
we project a 26Al(3He,t)26Si*(p)25Al coincidence rate of 1/hour.
500-thick Silicon5 Sectors; 16 strips eachCovering 131°lab166°80-energy and 80-time signals
Yale LampShade Array - YLSA
26Al(3He,t)26Si*(p)25Al E YLSA vs. Focal Plane
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
5.566.577.58
FP excitation energy (MeV)
YLSA
ene
rgy
26Al(3He,t)26Si(p)25Al(g.s.)
26Mg(3He,t)26Al(p)25Mg
26Al(3He,t)26Si(p)25Al*
27Al(3He,t)27Si*(p)26Al
27Al(3He,t)27Si*(p)26Al
Yale – Nuclear Astrophysics Group
Faculty and Post Doc: Peter Parker Jason ClarkCurrent Graduate Students: Christopher Wrede (4th year) Catherine Deibel (5th year)Most Recent PhDs: Anuj Parikh (’06), PostDoc @ Barcelona Rachel Lewis (‘05), PostDoc @ Univ.of York Dale Visser (’03), Microsoft, Seattle Alan Chen (’00), Faculty @ McMaster Dan Bardayan (’99DNP), Wigner Fellow @ ORNL
Recent PostDocs: Jac Caggiano @ Hanford Lab, Richland, WA
Will Bradfield-Smith @ Univ.Western Ontario
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