However, the invention does not exclude other gaseous media, such as for example a mixture containing carbon monoxide, of which excitation produces {HEAD ~ an emission}, still in {TAIL ~ the infrared}, of about 5 μm wave length 
in
However , the invention does not exclude other gaseous media , such as for example a mixture containing carbon monoxide , of which excitation produces { HEAD ~ an emission } , still in { TAIL ~ the infrared } , of about 5 μm wave length
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH