 For a master 's research problem , Professor Thomas Laby had Burhop investigate the probability K shell ionisation by electron impact by measuring the intensity of the resultant X @-@ ray emissions . This aroused an interest in the Auger effect , a subject in which he would later become an authority . By contrast , his master 's thesis on " The Band Spectra of Diatomic Molecules " had little influence on his later work . 
