We present new experimental measurements of resonance strengths in the astrophysical $^{23}$Al()$^{24}$Si reaction, constraining the pathway of nucleosynthesis beyond $^{22}$Mg in X-ray burster scenarios. Specifically, we have performed the first measurement of the () 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 = 157 keV, in the astrophysical $^{23}$Al() reaction, by a factor of 4. Our results show that the $^{22}$Mg()$^{23}$Al() pathway dominates over the competing $^{22}$Mg() reaction in all but the most energetic X-ray burster events ( GK), significantly affecting energy production and the preservation of hydrogen fuel.
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"value": "We present new experimental measurements of resonance strengths in the astrophysical $^{23}$Al(<math><mi>p</mi><mo>,</mo><mi>\u03b3</mi></math>)$^{24}$Si reaction, constraining the pathway of nucleosynthesis beyond $^{22}$Mg in X-ray burster scenarios. Specifically, we have performed the first measurement of the (<math><mi>d</mi><mo>,</mo><mi>p</mi></math>) 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 \u223c20%. Using these spectroscopic factors, together with mirror state identifications, we have reduced uncertainties in the strength of the key \u2113 = 0 resonance at <math><msub><mrow><mi>E</mi></mrow><mrow><mi>r</mi></mrow></msub></math> = 157 keV, in the astrophysical $^{23}$Al(<math><mi>p</mi><mo>,</mo><mi>\u03b3</mi></math>) reaction, by a factor of 4. Our results show that the $^{22}$Mg(<math><mi>p</mi><mo>,</mo><mi>\u03b3</mi></math>)$^{23}$Al(<math><mi>p</mi><mo>,</mo><mi>\u03b3</mi></math>) pathway dominates over the competing $^{22}$Mg(<math><mi>\u03b1</mi><mo>,</mo><mi>p</mi></math>) reaction in all but the most energetic X-ray burster events (<math><mi>T</mi><mo>></mo><mn>0.85</mn></math> GK), significantly affecting energy production and the preservation of hydrogen fuel."
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