High-precision mass measurement of Si 24 and a refined determination of the rp process at the A=22 waiting point

D. Puentes, Z. Meisel, G. Bollen, A. Hamaker, C. Langer, E. Leistenschneider, C. Nicoloff, W. J. Ong, M. Redshaw, R. Ringle, C. S. Sumithrarachchi, J. Surbrook, A. A. Valverde, I. T. Yandow

Research output: Contribution to journalArticlepeer-review

Abstract

We report a high-precision mass measurement of Si24, performed with the Low Energy Beam and Ion Trap (LEBIT) facility at the National Superconducting Cyclotron Laboratory. The atomic mass excess, 10753.8(37) keV, is a factor of 5 more precise than previous results. This substantially reduces the uncertainty of the Al23(p,γ)Si24 reaction rate, which is a key part of the rapid proton capture (rp) process powering type I x-ray bursts. The updated rate constrains the onset temperature of the (α,p) process at the Mg22 waiting point to a precision of 9%.

Original languageEnglish
Article numberL012801
JournalPhysical Review C
Volume106
Issue number1
DOIs
StatePublished - Jul 2022

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