Speaker
Description
The $^{22}\rm{Ne}(\alpha,\gamma)^{26}\rm{Mg}$ is an important reaction in stellar helium burning environments as it competes directly with one of the main neutron source for the s-process $^{22}\rm{Ne}(\alpha,n)^{25}\rm{Mg}$ reaction. The reaction rate of the $^{22}\rm{Ne}(\alpha,\gamma)^{26}\rm{Mg}$ reaction is dominated by low energy energy resonances at $E_{R}^{lab}$ = 0.65, 0.83 MeV. The $E_{R}^{lab}$ = 0.83 MeV resonance has been measured previously using both direct and indirect detection techniques, but there are large uncertainties in the previous measurements. We confirmed the measurement of the $E_{R}^{lab}$ = 0.83 MeV resonance using solid implanted $^{22}$Ne target and provide a resonance strength ($\omega\gamma$ = 35 $\pm$ 4 $\mu eV$) with smaller uncertainties. We also measured the $E_{R}^{lab}$= 851 keV resonance in $^{22}\rm{Ne}(p,\gamma)^{23}\rm{Na}$, and obtained a resonance strength ($\omega\gamma$ = 9.15 $\pm$ 0.7 eV), with significantly lower uncertainties compared to previous measurements. The other low energy resonance in $^{22}\rm{Ne}(\alpha,\gamma)^{26}\rm{Mg}$ at
$E_{R}^{lab}$ = 0.65 MeV, was measured directly for the first time and we provide an upper limit of $\omega\gamma \mathrm{<0.028}$ $\mu eV$ for this resonance.
