Two new electronic transitions of Bi2

The absorption spectra of Bi2 molecule has been obtained in the region 3166–3380 A in the second order of a 3.4 m Ebert Spectrograph with a reciprocal dispersion of 2.6 A/mm. The bands obtained are found to belong to two new systems named G-X and J-X. Vibrational analysis is performed and computer methods have been used to determine the molecular constants.