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# HANLE EFFECT MEASUREMENT OF THE LIFETIME OF THE $A^{1}\Pi$ STATE OF PN

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/16485

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 Title: HANLE EFFECT MEASUREMENT OF THE LIFETIME OF THE $A^{1}\Pi$ STATE OF PN Creators: Moeller, Michael B.; McKeever, Mark R.; Silvers, S. J. Issue Date: 1974 Abstract: The Hanle effect of the A $\rightarrow$ X fluorescence of phosphorus mononitride has been observed. PN was generated by discharge of a mixture of $N_{2}$ and $PCl_{3}$ and its $A^{1}\Pi$ state excited by the output of a PN molecular lamp. Fluorescence from the $v^{\prime} = 0$ level was monitored and the Hanle effect measured different cell pressures. The signal at each pressure was fit by a calculation in which lamp and fluorescence cell rotational temperatures and excited state g-values are assumed known and the excited state lifetime thereby determined. On extrapolation to zero pressure a radiative lifetime for the $A^{1}\Pi(v^{\prime} = 0)$ state of 227 $\pm$ 57 nsec is obtained. URI: http://hdl.handle.net/1811/16485 Other Identifiers: 1974-TG-4