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arXiv · 2208.08481

Single neutron transfer on 23Ne and its relevance forthepathway ofnucleosynthesis in astrophysical X-ray bursts

G. Lotay·J. Henderson·W. N. Catford·F. A. Ali·J. Berean·N. Bernier·S. S. Bhattacharjee·M. Bowry·R. Caballero-Folch·B. Davids·T. E. Drake·A. B. Garnsworthy·F. GhaziMoradi·S. A. Gillespie·B. Greaves·G. Hackman·S. Hallam·D. Hymers·E. Kasanda·D. Levy·B. K. Luna·A. Mathews·Z. Meisel·M. Moukaddam·D. Muecher·B. Olaizola·N. A. Orr·H. P. Patel·M. M. Rajabali·Y. Saito·J. Smallcombe·M. Spencer·C. E. Svensson·K. Whitmore·M. Williams
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Abstract

We present new experimental measurements of resonance strengths in the astrophysical 23Al(p, γ)24Si reaction, constraining the pathway of nucleosynthesis beyond 22Mg in X-ray burster scenarios. Specifically, we have performed the first measurement of the (d, p) reaction using a radioactive beam of 23Ne to explore levels in 24Ne, the mirror analog of 24Si. Four strong single-particle states were observed and corresponding neutron spectroscopic factors were extracted with a precision of {\sim}20{\%}. Using these spectroscopic factors, together with mirror state identifications, we have reduced uncertainties in the strength of the key {\ell} = 0 resonance at Er= 157 keV, in the astrophysical 23Al(p, γ) reaction, by a factor of 4. Our results show that the 22Mg(p, γ)23Al(p, γ) pathway dominates over the competing 22Mg(α, p) reaction in all but the most energetic X-ray burster events (T>0.85GK), significantly affecting energy production and the preservation of hydrogen fuel.

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G. Lotay, J. Henderson, W. N. Catford, F. A. Ali, J. Berean, N. Bernier, S. S. Bhattacharjee, M. Bowry, R. Caballero-Folch, B. Davids, T. E. Drake, A. B. Garnsworthy, F. GhaziMoradi, S. A. Gillespie, B. Greaves, G. Hackman, S. Hallam, D. Hymers, E. Kasanda, D. Levy, B. K. Luna, A. Mathews, Z. Meisel, M. Moukaddam, D. Muecher, B. Olaizola, N. A. Orr, H. P. Patel, M. M. Rajabali, Y. Saito, J. Smallcombe, M. Spencer, C. E. Svensson, K. Whitmore, M. Williams. 2022-08-17. Single neutron transfer on 23Ne and its relevance forthepathway ofnucleosynthesis in astrophysical X-ray bursts. https://doi.org/10.1016/j.physletb.2022.137361

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