Abstract
In a previous paper, we proposed a band scheme for C u C l established with the help of the reflection spectra measured at low temperature up to 30 eV. Now we are extending this study to CuBr and CuI where the optical data are obtained in the same way. Some experimental features are characterized, through the whole sequence, by their thermal behaviour and by the evolution of their structure in relation to the increasing spin orbit separation from CuCl to CuI. This study also shows the similarity of the band schemes in the three halides and the interest of optical measurements, at low temperature and in a wide energy range, for band scheme determination.
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