Abstract
Thirty‐six new lines in the 9–11‐μm wavelength region have been observed in continuous emission from a CO2 laser. These lines are identified as rotation‐vibration transitions in the (00°2‐[10°1, 02°1]I) and (00°2‐[10°1, 02°1]II) bands. Several hundred milliwatts of power have been obtained on most of these transitions.