Abstract

The spectrum of the lowest perpendicular bending vibration-rotation band in Ar-HCl, occurring near 35 cm⁻¹, has been obtained with this new technique with SNRs in excess of 10⁴ and resolution of nuclear hyperfine structure. Eighty Stark hyperfine components of the R(0), Q(1), and Q(2) vibration-rotation lines of Ar–H³⁵Cl and eighty-four Stark hyperfine components of the R(0), Q(1), and Q(2) vibration-rotation lines of Ar–H³⁷ Cl have been measured with a precision of <1 MHz and analyzed by least-squares techniques to obtain precise values for the vibrational band origin, the dipole moment, the effective rotational constant, the I-type doubling constant, and the chlorine nuclear quadrupole coupling constants in the excited perpendicular bending state.

© 1986 Optical Society of America