High-precision mass measurement of <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Si</mi><mprescripts></mprescripts><none></none><mn>24</mn></mmultiscripts></math> and a refined determination of the <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>r</mi><mi>p</mi></mrow></math> process at the <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>A</mi><mo>=</mo><mn>22</mn></mrow></math> 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

doi:10.1103/PhysRevC.106.L012801

Letter

High-precision mass measurement of ${}^{24}{Si}$ and a refined determination of the $r p$ process at the $A = 22$ waiting point

D. Puentes ^1,2,*, Z. Meisel ^3,4, G. Bollen^1,5, A. Hamaker ^1,2, C. Langer⁶, E. Leistenschneider ², C. Nicoloff ^1,2, W.-J. Ong^7,4, M. Redshaw^2,8 et al.

R. Ringle ², C. S. Sumithrarachchi², J. Surbrook ^1,2, A. A. Valverde ⁹, and I. T. Yandow ^1,2

¹Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
²National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
³Institute of Nuclear & Particle Physics, Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
⁴Joint Institute for Nuclear Astrophysics – Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
⁵Facility for Rare Isotope Beams, East Lansing, Michigan 48824, USA
⁶University of Applied Sciences Aachen, 52066 Aachen, Germany
⁷Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
⁸Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
⁹Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2

^*puentes@frib.msu.edu

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Phys. Rev. C 106, L012801 – Published 5 July, 2022

DOI: https://doi.org/10.1103/PhysRevC.106.L012801

Abstract

We report a high-precision mass measurement of ${}^{24}{Si}$ , performed with the Low Energy Beam and Ion Trap (LEBIT) facility at the National Superconducting Cyclotron Laboratory. The atomic mass excess, $10 753.8$ (37) keV, is a factor of 5 more precise than previous results. This substantially reduces the uncertainty of the ${}^{23}{Al} (p, γ) {}^{24}{Si}$ reaction rate, which is a key part of the rapid proton capture ( $r p$ ) process powering type I x-ray bursts. The updated rate constrains the onset temperature of the $(α, p)$ process at the ${}^{22}{Mg}$ waiting point to a precision of 9%.

Physical Review C

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High-precision mass measurement of ${}^{24}{Si}$ and a refined determination of the $r p$ process at the $A = 22$ waiting point

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High-precision mass measurement of Si24 and a refined determination of the rp process at the A=22 waiting point

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High-precision mass measurement of ${}^{24}{Si}$ and a refined determination of the $r p$ process at the $A = 22$ waiting point