The ^40Ca( α,γ )^44Ti Reaction Using DRAGON

Details The ^40Ca( α,γ )^44Ti Reaction Using DRAGON The ^40Ca( α,γ )^44Ti Reaction Using DRAGON

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aps..dnp.ee002o&link_type=abstract

American Physical Society, 2007 Annual Meeting of the Division of Nuclear Physics, October 10-13,2007, abstract #EE.002

Physics

Nuclear Physics

Scientific paper

^44Ti is one a handful of short lived nuclei believed to be a signature of explosive nucleosynthesis, a product of α-rich freezeout following a core collapse supernova. To understand the production of 44Ti a key reaction, ^40Ca( α,γ )^44Ti, has been studied in inverse kinematics using the DRAGON recoil separator located at ISAC/TRIUMF in Vancouver B.C. The coincidence detection of the recoils and γ-rays coupled with a time of flight technique provided an accurate determination of the excitation function over a range of beam energies of 0.6 -- 1.14 MeV/u. Direct measurement of the stopping power permitted an accurate measure of the stellar reaction rate. The excitation function hints towards previously undiscovered resonances and the new rate results in increased ^44Ti production from supernovae judging from prompt γ-ray studies alone.

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