Previous abstract Next abstract

Session 53 - Gamma Ray Investigations.
Oral session, Thursday, June 12
North Main Hall F/G,

[53.01] Identifying Nuclear Reaction Rates That Are Important For ^44Ti Supernova Nucleosynthesis

L. -S. The, B. S. Meyer, D. D. Clayton (Clemson University)

Large excesses of ^44Ca in certain presolar graphite and silicon carbide grains give strong evidence for ^44Ti production in supernovae. Furthermore, recent detection of the ^44Ti \gamma-line from the Cas A SNR by CGRO/COMPTEL shows that radioactive ^44Ti is produced in supernovae. In this work we study the conditions needed for ^44Ti production in alpha-rich freezeouts in core-collapse supernovae as a function of peak temperature and density. We survey the key nuclear reactions governing ^44Ti production by varying their cross sections. We identify and rank their importance. We find ^44Ti production is most sensitive to variations in the rates of the reactions ^44Ti(\alpha,p)^47V, \alpha(2\alpha,\gamma)^12C, and ^45V(p,\gamma)^46Cr. Because many of these rates are unknown experimentally, our results suggest the most important targets for future cross section measurements.

If you would like more information about this abstract, please follow the link to hubcap.clemson.edu/$\sim$tlihsin. This link was provided by the author. When you follow it, you will leave the the Web space for this meeting; to return, you should use the Back button on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: lihsin@astro.phys.clemson.edu

Program listing for Thursday