Nuclear Reactions in Stars & in the Laboratory
Nuclear Reactions in Stars & in the Laboratory
Nuclear Reactions in Stars & in the Laboratory
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A+p<br />
capture<br />
Resonance<br />
Cross-Section and S<br />
Cross section and reaction rate<br />
Section and S-Factor<br />
B<br />
energy<br />
cross section often expressed as S-factor<br />
A+p<br />
A+p<br />
Resonance<br />
B<br />
direct<br />
capture<br />
B<br />
cross section<br />
S(E) = σ(E) E exp(2πη)<br />
direct<br />
capture<br />
uncerta<strong>in</strong>ties at low energies<br />
due to deviations from<br />
Resonance<br />
l=0 Coulomb penetrability<br />
and due to threshold contributions<br />
energy<br />
cross section often expressed as S-factor<br />
S-factor<br />
direct<br />
capture<br />
energy<br />
Resonance<br />
S-factor to correct for Coulomb barrier: S(E) = σ(E) E e 2πη<br />
S(E) = σ(E) E exp(2πη)<br />
-factor<br />
direct<br />
capture
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