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Single neutron transfer on Ne and its relevance for the pathway of nucleosynthesis in astrophysical X-ray bursts
- Source :
- Physics Letters
- Publication Year :
- 2022
- Publisher :
- Elsevier, 2022.
-
Abstract
- We present new experimental measurements of resonance strengths in the astrophysical $^{23}$Al(p,γ)$^{24}$Si reaction, constraining the pathway of nucleosynthesis beyond $^{22}$Mg in X-ray burster scenarios. Specifically, we have performed the first measurement of the (d,p) reaction using a radioactive beam of $^{23}$Ne to explore levels in $^{24}$Ne, the mirror analog of $^{24}$Si. Four strong single-particle states were observed and corresponding neutron spectroscopic factors were extracted with a precision of ∼20%. Using these spectroscopic factors, together with mirror state identifications, we have reduced uncertainties in the strength of the key ℓ = 0 resonance at Er = 157 keV, in the astrophysical $^{23}$Al(p,γ) reaction, by a factor of 4. Our results show that the $^{22}$Mg(p,γ)$^{23}$Al(p,γ) pathway dominates over the competing $^{22}$Mg(α,p) reaction in all but the most energetic X-ray burster events (T>0.85 GK), significantly affecting energy production and the preservation of hydrogen fuel.
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physics Letters
- Accession number :
- edsair.od......3000..d9e6bfef2be22f2f3e407646511e2e54