LONG CITATION
Professor John W. Hepburn is an expert on the interaction of laser light with atoms and molecules. He was the first to show that the ZEKE spectroscopic technique could be used to measure high energy ionization thresholds. He showed that the well-known Frank-Condon approximation broke down for some ZEKE experiments, and this breakdown could be exploited to measure the very high energy vibrational levels of diatomic ions. Most recently, Dr. Hepburn has developed a new technique, called threshold ion-pair production spectroscopy, which he has used to measure chemical bond strengths to unprecedented parts per million accuracy.

SHORT CITATION
Professor John W. Hepburn is an expert on the interaction of laser light with atoms and molecules. He showed that the ZEKE spectroscopic technique could measure high energy ionization thresholds, and exploited the breakdown of the Frank-Condon approximation to measure the high energy vibrational levels of diatomic ions. Recently, he has measured chemical bond strengths to unprecedented accuracy.