Template:ASTR508/Nuclear Physics

Nuclear Physics

Reading Assignment

Chapter 10 of Stellar-Astrophysics Notes

Nuclear Reactions

element Z A M/mu element Z A M/mu  element Z A M/mu 
  n 0 1 1.008665   C 6 12 12.000000    Ne 10 20 19.992441
  H 1 1 1.007825     6 13 13.003354    Mg 12 24 23.985043
    1 2 2.014101   N 7 13 13.005738    Si 14 28 27.976930
 He 2 3 3.016029     7 14 14.003074    Fe 26 56 55.934940
    2 4 4.002603     7 15 15.000108    Ni 28 56 55.942139
 Li 3 6 6.015124   O 8 15 15.003070 
    3 7 7.016003     8 16 15.994915
 Be 4 7 7.016928     8 17 16.999133
    4 8 8.005308     8 18 17.999160

Proton-Proton Cycle

Bethe & Critchfield, 1938

Adelberger et al. 2010

Thinking about weak interactions

CNO Cycle

Helium Burning

Summary

$\epsilon =\epsilon _{0}T_{6}^{\nu }$

or

$\epsilon =\epsilon _{0}T_{8}^{\nu }$

 Proton-Proton             CNO Cycle            Triple Alpha
--------------          --------------        --------------
 T6    e0       nu         e0     nu         T8    e0      nu
------------------------------------------------------------------
 10  0.07     4.60        3e-4      22.9    0.8   2e-12    49
 20  1        3.54      4.5e02      18      1.0   4e-8     41 
 40  9        2.72        3e07      14.1    2.0   15       19
 80 43        2.08        2e11      11.1    3.0   6e3      12
100   -        -          2e12      10.2    4.0   1e5       7.9

Advanced Nuclear Reactions