# ANTICROSSINGS AND MICROWAVE TRANSITIONS BETWEEN EXCITED ELECTRONIC STATES IN $H_{2}$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/16290

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 Title: ANTICROSSINGS AND MICROWAVE TRANSITIONS BETWEEN EXCITED ELECTRONIC STATES IN $H_{2}$ Creators: Miller, Terry A.; Freund, Robert S. Issue Date: 1974 Publisher: Ohio State University Abstract: Electronic states of simple molecules are typically separated by energies such that transitions between them occur by emission or absorption of photons in the UV, visible, or near IR regions of the spectrum. However, for highly excited states the increased density of levels greatly improves the probability that there exist transitions which lie in the microwave or radio frequency region of the spectrum. Classical microwave spectroscopy is nonetheless generally impossible because of the short ($\mu$sec-nsec) lifetimes of the states involved. We have, however, observed such transitions in the hydrogen molecule by two different techniques. One of these techniques involves the modification of our MOMRIE (Microwave Optical Magnetic Resonance Induced by Electrons) apparatus to observe microwave transitions between, rather than within, short-lived excited states. The other technique involves magnetically tuning the energy levels to essentially degeneracy, where the levels suffer an anticrossing (avoided crossing). The position of such an anticrossing can be determined by its effects upon the visible, or IR photon emission of the states. Description: Author Institution: Bell Laboratories URI: http://hdl.handle.net/1811/16290 Other Identifiers: 1974-MG-6