NucleoSynthesis of Galactic 26 Al 25 Al+p Resonances Peter Parker, Yale University Catherine Deibel, Rachel Lewis, Anuj Parikh, Christopher Wrede Jac Caggiano,

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Presentation transcript:

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

(p,  ) 26 Si(   ) 26m Al(   ) 26 Mg GS 24 Mg(p,  ) 25 Al (   ) 25 Mg(p,  ) 26 Al(   ) 26* Mg(  26 Mg GS 25 Al Branch Point :

25 Al(p,  ) 26 Si  Resonance Searches: 29 Si( 3 He, 6 He) 26 Si (Caggiano) 24 Mg( 3 He,n) 26 Si (Parpottas) 28 Si(p,t) 26 Si (Bardayan) [ 26 Al( 3 He,t) 26 Si(p) 25 Al ] (Yale) TRIUMF E1071 (C. Deibel) TRIUMF DRAGON E922 (A. Chen) Direct Measurement:

29 Si( 3 He, 6 He) 27 Si ( Yale ): Caggiano, et al. Phys.Rev.C 65,055801(2002)

24 Mg( 3 He,n) 26 Si ( Ohio Univ.): Parpottas, et al. Phys.Rev.C 70,065805(2004).

28 Si(p,t) 26 Si ( ORNL ): Bardayan, et al. Phys.Rev.C 74,045804(2006).

25 Al(p,  ) 26 Si: Parpottas, et al. Phys.Rev.C 73,049907(E) (2006).

26 Al Implanted Target : (TRIUMF-ISAC Proposal E1071) HRMS   4  Al/sec at an energy of 51 keV  Al/cm 2 rastered into a 3-mm diameter circle in 4 to 7 days, into a 40 μg/cm 2 carbon foil  Contamination: About 1 to 10% 26 Na(  - ) 26 Mg,  But  no 27 Al With this target, in conjunction with the Yale split-pole spectrograph and the YLSA silicon array, we project a 26 Al( 3 He,t) 26 Si * (p) 25 Al coincidence rate of 1/hour.

500-  thick Silicon 5 Sectors; 16 strips each Covering 131°  lab  166° 80-energy and 80-time signals Yale LampShade Array - YLSA

26 Al( 3 He,t) 26 Si*(p) 25 Al E YLSA vs. Focal Plane

27 Al( 3 He,t) 27 Si*(p) 26 Al

Yale – Nuclear Astrophysics Group Faculty and Post Doc: Peter Parker Jason Clark Current Graduate Students: Christopher Wrede (4 th year) Catherine Deibel (5 th year) Most Recent PhDs: Anuj Parikh (’06), Barcelona Rachel Lewis (‘05), Univ.of York Dale Visser (’03), Microsoft, Seattle Alan Chen (’00), McMaster Dan Bardayan (’99 DNP ), Wigner ORNL Recent PostDocs: Jac Hanford Lab, Richland, WA Will Univ.Western Ontario