Table 1: Main processes of slow neutrino emission in nucleon matter: Murca and bremsstrahlung (brems).
Process   $Q_{\rm s}$, erg cm $^{-3 \rule{0cm}{0.2cm}}$ s-1
Murca ${\rm nN \to pN e \bar{\nu} \quad
pN e \to nN \nu } $ $\quad 10^{20 \rule{0cm}{0.2cm}}{-}3 \times 10^{21}$
Brems. ${\rm NN \to NN \nu \bar{\nu}}$ $\quad 10^{19 \rule{0cm}{0.2cm}}{-}10^{20}$


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