R branch
= R branch
{c}
{title2=$\Delta J=+1$}
The <rovibrational spectroscopy> branch in which absorption raises the total rotational <angular momentum> quantum number by one. A label $R(J)$ conventionally specifies the lower-state value $J$.
= R branch
{c}
{title2=$\Delta J=+1$}
The <rovibrational spectroscopy> branch in which absorption raises the total rotational <angular momentum> quantum number by one. A label $R(J)$ conventionally specifies the lower-state value $J$.