Photofragment translational spectroscopy of n-butyl iodide at 277 and 304 nm : polarization dependence and energy partitioning

Photodissociation of n-C 4 H 9 I at excitation wavelengths of 277 and 304 nm has been studied utilizing state-selective photofragment translational spectroscopy. The quantum yields of I * ( 2 P 1/2 ) at these wavelengths are determined to be 0.61 and 0.14, respectively. The anisotropy parameters observed at 277 nm are β(1)=1.6±0.1 for the ground-state I( 2 P 3/2 ) and β(I * )=0.9±0.1 for the excited-state I * ( 2 P 1/2 ) which substantially differs from the limiting value