Further Analysis of theN2+Bands

Abstract

The $\Delta v=3\mathrm{}$ sequence of the ${}_{}{}^2{}_{}{}^{}\Sigma -{}_{}{}^2{}_{}{}^{}\Sigma$ ${\mathrm{N}}_2^{+}$ bands has been photographed in the second and third orders of a 21 foot grating. Rotational analyses have been made of the (4,7), (5,8), (6,9) and (7,10) bands. The $B$ values obtained fit the expressions previously given for ${B_v}^{\prime }$ and ${B_v}^{\prime \prime }$ quite well. The perturbation in the (5,8) band has been investigated. The present data on the perturbing ${}_{}{}^2{}_{}{}^{}\Pi$ state are discussed. Additional measurements in the (13,15) band are also given.