Optical absorption in short-lived excited states of atomic neon caused by dye-laser intracavity absorption has been observed. The states were excited by a microwave discharge in neon gas produced by a microwave cavity located inside the optical cavity of the dye laser. All transitions arising from the 2p manifold of states that are usually seen in emission are here seen in absorption. Best theoretical estimates of the number density of each of the 2p states in the discharge is about 10(5)-10(7)/cm(3), and the mean lifetime of the states is about 19 x 10(-9) sec.
A computer interface for a PARC model 1205A Optical Multichannel Analyzer (OMA) is described. This interface uses the output from the OMA’s internal analog-to-digital converter rather than the usual parallel I/O facility. The ADC output is transmitted from the OMA to the computer over a single 75-Ω coax cable. Since the data obtained from each OMA scan may be stored in the computer memory, extremely versatile processing algorithms may be used, and normal OMA operation is not affected. The software used is also described.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.