title: A Two-Channel Scanning Spectro photometer for Use in Studies of Collision Broadening and Shift in Optical Spectra.
abstract: A two-channel scanning spectrophotometer is described which has been used, in conjunction with a high resolution grating spectrograph, to make measurements of collision broadening and shift in optical absorption spectra to an accuracy of 0.001 cm(-1). Shifts with respect to a reference spectrum are measured directly from the chart of a two-pen recorder, while profiles are recorded on punched paper tape ready for computer analysis. Errors which might arise from intensity fluctuations in the light source or from nonlinearity of the scanner motion are completely eliminated.
authors.forename: A D
authors.initials: AD
authors.lastname: Petford
authors.forename: G
authors.initials: G
authors.lastname: Smith