Knowledge Bank

The emission spectrum of ReN has been reinvestigated in the visible region using a Fourier transform spectrometer. Two new bands have been located at 22110 and 22224 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ and assigned as the 0$+$ - A1 and 0$-$ - A1 transitions. From the rotational analysis of these bands it has been concluded that the current 0$+$ - A1 transition and the [24.7]0$+$ - X0$+$ transition observed previously by Balfour et al. [J. Mol. Spectrosc. 183, 113-118 (1997)] have an upper state in common. This assignment provides T$\mathrm{<mrow\; data-mjx-texclass="ORD">00</mrow>}$ = 2596 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ for the A1 state. It is likely that the A1 and X0$+$ states are two components of the $3\Sigma -$ ground state.