Как выбрать гостиницу для кошек
14 декабря, 2021
Сегодня каждый, кто собирается в отпуск и не знает, с кем оставить своего котика или кошку, может во[...]
Narrow resonance infinite mass approximation (NRIM)
The NR approximation is not valid for some of the most important low-energy resonances of the fertile materials. In this case it is possible to assume the validity of NR for moderator collisions, while the energy loss due to collisions with the absorber atoms is neglected (infinite mass of the absorber). The first integral in eqn. (7.3) becomes then
lim t—^— І*’"0 <t>(E’)%s0^= Ф(Е)ЇАЕ) (7.6)
while the second integral is treated as in the NR case so that we have
ф(Е)%!{Е) = ф(E)Xso + — g 2,i
2i (E) = Xso(E) + 2,i + Xa(E)
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