2022 journal article

Cite it

Direct Measurement of Resonances in 7Be(alpha,gamma )11C Relevant to vp-Process Nucleosynthesis

PHYSICAL REVIEW LETTERS, 129(16).

By: A. Psaltis ^*, A. Chen^*, R. Longland ⁿ , D. Connolly ^*, C. Brune ^*, B. Davids ^*, J. Fallis ^*, R. Giri^* ...and 14 other authors, including 1 NC State author, U. Greife ^*, D. Hutcheon^*, L. Kroll ^*, A. Lennarz ^*, J. Liang ^*, M. Lovely ^*, M. Luo ^*, C. Marshall ⁿ, S. Paneru ^*, A. Parikh ^*, C. Ruiz ^*, A. Shotter^*, M. Williams ^*, N. Collaboration

10.1103/PhysRevLett.129.162701

Find Text @ NCSU

PubMed

UN Sustainable Development Goal Categories

7. Affordable and Clean Energy (Web of Science)

Source: Web Of Science

Added: December 5, 2022

We have performed the first direct measurement of two resonances of the ^{7}Be(α,γ)^{11}C reaction with unknown strengths using an intense radioactive ^{7}Be beam and the DRAGON recoil separator. We report on the first measurement of the 1155 and 1110 keV resonance strengths of 1.73±0.25(stat)±0.40(syst)  eV and 125_{-25}^{+27}(stat)±15(syst)  meV, respectively. The present results have reduced the uncertainty in the ^{7}Be(α,γ)^{11}C reaction rate to ∼9.4%-10.7% over T=1.5-3  GK, which is relevant for nucleosynthesis in the neutrino-driven outflows of core-collapse supernovae (νp process). We find no effect of the new, constrained reaction rate on νp-process nucleosynthesis.