Abstract

The 5 m Jarrell-Ash Czerny-Turner spectrograph at the Institute for Molecular Physics has been adapted to spectrometric operation in the 1–2 μm wavelength region. A lead screw assembly with a stepping motor drive has been installed to translate an exit slit that is focused onto a cooled intrinsic germanium detector. The exceptional sensitivity of this detection system has produced good signal-to-noise ratios in the third order of a 300 line/mm echelle grating which yields a reciprocal dispersion of 1.44 Å/mm at the exit slit. The resolution achieved was energy limited at 0.046 cm⁻¹ and the precision of frequency measurement was 0.007 cm⁻¹. The 0-0 band of the $B^{\prime }\hspace{0.17em}{{}^3\mathrm{\Sigma }}_u^{-}\to B\hspace{0.17em}{{}^3\mathrm{\Pi }}_g$ system of molecular nitrogen was the subject of the investigation. Although this system is known as the infrared afterglow system, the band emits strongly in a dc glow discharge and it has been possible to resolve nearly 1000 lines in the band. The preponderance of the lines in the region are from the 0-0 B′ → B transition, with only a small 1 PG emission toward the red end of the band.

© 1978 Optical Society of America

High resolution spectrum of the N₂⁺ Meinel system to 11 250 Å

W. Benesch, D. Rivers, and J. Moore
J. Opt. Soc. Am. 70(7) 792-799 (1980)

Infrared Electronic Emission Spectrum of Nitrogen

K. A. Saum and W. M. Benesch
Appl. Opt. 9(1) 195-200 (1970)

Transition probabilities for the W³Δu–B³Πg system of molecular nitrogen

R. Covey, K. A. Saum, and W. Benesch
J. Opt. Soc. Am. 63(5) 592-596 (1973)

High-Resolution Emission Lyman-Birge-Hopfield Bands of Nitrogen

R. E. MILLER
J. Opt. Soc. Am. 60(2) 171-176 (1970)

Spectroscopic analysis of the transverse excited C³Πu → B³Πg (0—0) uv laser band of N₂ at room temperature

Alain Petit, Françoise Launay, and Joëlle Rostas
Appl. Opt. 17(19) 3081-3087 (1978)