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NucleoSynthesis of Galactic 26 Al 25 Al+p Resonances Peter Parker, Yale University Catherine Deibel,...
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Transcript of NucleoSynthesis of Galactic 26 Al 25 Al+p Resonances Peter Parker, Yale University Catherine Deibel,...
NucleoSynthesis of Galactic 26Al
25Al+p Resonances
Peter Parker, Yale University
Catherine Deibel, Rachel Lewis, Anuj Parikh, Christopher Wrede
Jac Caggiano, Jason Clark
ORNL - 23 Oct.’06
24Mg25Mg
Mg*26
25Al26 g.s.Al
26S i
26 mAl
Mg26 g.s.
1.80
9-MeV
ra
y
(p,)26Si()26mAl()26MgGS
24Mg(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:
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)
YL
SA
en
erg
y
26Al(3He,t)26Si(p)25Al(g.s.)
26Mg(3He,t)26Al(p)25Mg
26Al(3He,t)26Si(p)25Al*
Yale – Nuclear Astrophysics Group
Faculty and Post Doc:
Peter Parker
Jason Clark
Current 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