19F(α,n)22Na, 22Ne(p,n)22Na, and the Role of their Inverses in the Destruction of 22Na
The inverses of the <sup>19</sup>F(α,n)<sup>22</sup>Na and <sup>22</sup>Ne(p,n)<sup>22</sup>Na reactions may be important destruction mechanisms for <sup>22</sup>Na in neutron-rich, high-temperature or explosive nucleosynthesis. I have meas...
Summary: | The inverses of the <sup>19</sup>F(α,n)<sup>22</sup>Na and <sup>22</sup>Ne(p,n)<sup>22</sup>Na reactions may be important destruction mechanisms for <sup>22</sup>Na in neutron-rich, high-temperature or explosive nucleosynthesis. I have measured the cross sections for the <sup>19</sup>F(α,n)<sup>22</sup>Na and <sup>22</sup>Ne(p,n)<sup>22</sup>Na reactions from threshold to 3.1 and 5.4 MeV, respectively. The absolute efficiency of the 4π neutron detector was determined by Monte Carlo calculations and calibrated using two standard sources and two nuclear reactions. Cross sections for the inverse reactions have been calculated using the principle of detailed balance, and reaction rates for both the reactions and their inverses determined for temperatures between 0.01 and 10 GK for <sup>19</sup>F(α,n)<sup>22</sup>Na and between 0.1 and 10 GK for <sup>22</sup>Ne(p,n)<sup>22</sup>Na. |
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