Advancement of Photospheric Radius Expansion and Clocked Type-I X-Ray Burst Models with the New ${}^{22}$Mg$(\alpha ,p{)}^{25}$Al Reaction Rate Determined at Gamow Energy

Abstract

We report the first (in)elastic scattering measurement of ${}^{25}\mathrm{Al}+p$ with the capability to select and measure in a broad energy range the proton resonances in ${}^{26}$Si contributing to the ${}^{22}$Mg$(\alpha ,p)$ reaction at type I x-ray burst energies. We measured spin-parities of four resonances above the $\alpha$ threshold of ${}^{26}$Si that are found to strongly impact the ${}^{22}$Mg$(\alpha ,p)$ rate. The new rate advances a state-of-the-art model to remarkably reproduce light curves of the GS 1826$-$24 clocked burster with mean deviation $<9$ % and permits us to discover a strong correlation between the He abundance in the accreting envelope of photospheric radius expansion burster and the dominance of ${}^{22}$Mg$(\alpha ,p)$ branch.

accepted by Physical Review Letters on 5 August 2021, published 19 October 2021

References in corpus (9)

• Thermonuclear (type-I) X-ray bursts observed by the Rossi X-ray Timing Explorer
• Dependence of X-Ray Burst Models on Nuclear Reaction Rates
• X-ray binaries
• Models of Type I X-ray Bursts from GS 1826-24: A Probe of rp-Process Hydrogen Burning
• Nucleosynthesis in Type I X-ray Bursts
• Low-lying non-normal parity states in 8B measured by proton elastic scattering on 7Be
• Investigation of thermonuclear ${}^{18}$Ne($\alpha$,$p$)${}^{21}$Na rate via resonant elastic scattering of ${}^{21}$Na+$p$
• Examination of the role of the ${}^{14}$O($\alpha$,$p$)${}^{17}$F reaction rate in type I x-ray bursts
• Constraining the Neutron Star Compactness: Extraction of the ${}^{23}$Al($p,\gamma$) Reaction Rate for the $rp$-Process

Cited by in corpus (7)

• Dense Matter in Neutron Stars with eXTP
• Impacts of the direct URCA and Superfluidity inside a Neutron Star on Type-I X-Ray Bursts and X-Ray Superbursts
• The Regulated NiCu Cycles with the new ${}^{57}$Cu(p,$\gamma$)${}^{58}$Zn reaction rate and the Influence on Type-I X-Ray Bursts: GS 1826$-$24 Clocked Burster
• Study of the ${}^{22}$Mg waiting point relevant for x-ray burst nucleosynthesis via the ${}^{22}$Mg($\alpha$,$p$)${}^{25}$Al reaction
• NinjaSat monitoring of Type-I X-ray bursts from the clocked burster SRGA J144459.2$-$604207
• Production of radioactive ${}^{22}$Na in core-collapse supernovae: the Ne-E(L) component in presolar grains and its possible consequences on supernova observations
• New ${}^{63}$Ga(p,$\gamma$)${}^{64}$Ge and ${}^{64}$Ge(p,$\gamma$)${}^{65}$As reaction rates corresponding to the temperature regime of thermonuclear X-ray bursts