Evaluation of Experimental Constraints on the ${}^{44}$Ti($\alpha$,p)${}^{47}$V Reaction Cross Section Relevant for Supernovae

Abstract

Due to its importance as an astronomical observable in core-collapse supernovae (CCSNe), the reactions producing and destroying ${}^{44}$Ti must be well constrained. Generally, statistical model calculations such as Hauser-Feshbach are employed when experimental cross sections are not available, but the variation in such adopted rates can be large. Here, data from the literature is compared with statistical model calculations of the ${}^{44}$Ti($\alpha$,p)${}^{47}$V reaction cross section and used to constrain the possible reaction rate variation over the temperatures relevant to CCSNe. Suggestions for targeted future measurements are given.

7 pages, 4 figures. PRC, published

References in corpus (7)

• Asymmetries in core-collapse supernovae from maps of radioactive ${}^{44}$Ti in CassiopeiaA
• Hard X-ray emission lines from the decay of Ti-44 in the remnant of supernova 1987A
• The distribution of radioactive ${}^{44}$Ti in Cassiopeia A
• The signature of 44Ti in Cassiopeia A revealed by IBIS/ISGRI on INTEGRAL
• Nucleosynthesis in 2D Core-Collapse Supernovae of 11.2 and 17.0 M${}_{\odot }$ Progenitors: Implications for Mo and Ru Production
• Experimental cross sections of 165Ho(α,n)168Tm and 166Er(α,n)169Yb for optical potential studies relevant for the astrophysical γ-process
• Nucleosynthesis Constraints on the Energy Growth Timescale of a Core-collapse Supernova Explosion

Cited by in corpus (1)

• Uncertainties in the production of iron-group nuclides in core-collapse supernovae from Monte Carlo variations of reaction rates