dc.creator Amano, T. en_US dc.creator Schwendeman, R.H. en_US dc.date.accessioned 2006-06-15T13:50:53Z dc.date.available 2006-06-15T13:50:53Z dc.date.issued 1976 en_US dc.identifier 1976-TS-10 en_US dc.identifier.uri http://hdl.handle.net/1811/9885 dc.description This work was supported by the U. S. Energy Research and Development Administration. Present address of Amy Sue Rispin: Laboratory of Chemical Physics, National Institutes of Health, Bethasda, Maryland, 20014 en_US dc.description Author Institution: Department of Chemistry, Michigan State University en_US dc.description.abstract Power-broadened lineshapes have been recorded for thirteen inversion transitions of $15_{NH_{3}}$ with a computer-controlled microwave spectrometer. The line profiles were recorded for each transition at several sample pressures and microwave powers. The recorded points were found to fit very well to a theoretical line shape which depends not only on the polarization relaxation time $T_{2}$ but also on the function $(T_{1}/T_{2}) ({\mu}{\in}_{o}/h)^{2}$ where $T_{1}$ is the population relaxation time., $\mu$ is the dipole moment matrix element, and $\in_{o}$ is the amplitude of the electric field of the radiation. Therefore, by careful measurement of the microwave power it was possible to determine both $T_{1}$ and $T_{2}$. The values of $T_{2}/T_{1}$ for the thirteen transitions in $^{15}NH_{3}$ were found to be all greater than one, ranging from 1.1 to 1.6. en_US dc.format.extent 119643 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title DETERMINATION OF $T_{2}/T_{1}$ FOR $^{15}NH_{3}$ TRANSITIONS BY ANALYSIS OF POWER-BROADENED LINESHAPES en_US dc.type article en_US
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