Abstract / Description of output
Classical novae are important contributors to the abundances of key isotopes, such as the radioactive $^{18}$F, whose observation by satellite missions could provide constraints on nucleosynthesis models in novae.
The $^{17}$O(p,$\gamma$)$^{18}$F reaction plays a critical role in the synthesis of both oxygen and fluorine isotopes but its reaction rate is not well determined because of the lack of experimental data at energies relevant to nova explosions. In this study, the reaction cross section has been measured directly for the first time in a wide energy range $E_{\rm cm} \simeq 200-370~{\rm keV}$ appropriate to hydrogen burning in classical novae. Also, the $E$=183~keV resonance strength, $\omega \gamma$=1.67$\pm$0.12~$\mu$eV, has been measured with the highest precision to date and the $^{17}$O(p,$\gamma$)$^{18}$F reaction rate has been improved by a factor of 4, thus leading to firmer constraints on accurate models of novae nucleosynthesis.
The $^{17}$O(p,$\gamma$)$^{18}$F reaction plays a critical role in the synthesis of both oxygen and fluorine isotopes but its reaction rate is not well determined because of the lack of experimental data at energies relevant to nova explosions. In this study, the reaction cross section has been measured directly for the first time in a wide energy range $E_{\rm cm} \simeq 200-370~{\rm keV}$ appropriate to hydrogen burning in classical novae. Also, the $E$=183~keV resonance strength, $\omega \gamma$=1.67$\pm$0.12~$\mu$eV, has been measured with the highest precision to date and the $^{17}$O(p,$\gamma$)$^{18}$F reaction rate has been improved by a factor of 4, thus leading to firmer constraints on accurate models of novae nucleosynthesis.
| Original language | English |
|---|---|
| Article number | 202501 |
| Number of pages | 5 |
| Journal | Physical Review Letters |
| Volume | 109 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 13 Nov 2012 |