Photofragment Translational Spectroscopy of Propargyl Radicals at 248 nm

The photodissociation of propargyl radical, C{sub 3}H{sub 3}, and its perdeuterated isotopolog was investigated using photofragment translational spectroscopy. Propargyl radicals were produced by 193 nm photolysis of allene entrained in a molecular beam expansion, and then photodissociated at 248 nm. photofragment time-of-flight spectra were measured at a series of laboratory angles using electron impact ionization coupled to a mass spectrometer. Data for ion masses corresponding to C{sub 3}H{sub 2}{sup +}, C{sub 3}H{sup +}, C{sub 3}{sup +}, and the analogous deuterated species show that both H and H{sub 2} loss occur. The translational energy distributions for these processes have average values <E{sub T}> = 5.7 and 15.9 kcal/mol, respectively, and are consistent with dissociation on the ground state following internal conversion, with no exit barrier for H loss but a tight transition state for H{sub 2} loss. The translational energy distribution for H atom loss is similar to that in previous work on propargyl in which the H atom, rather than the heavy fragment, was detected. The branching ratio for H loss/H{sub 2} loss was determined to be 97.6/2.4 {+-} 1.2, in good agreement with RRKM results

Panel Session - Women in Engineering Networking Panel

© 2018 IEEE. This panel will bring together women from various engineering disciplines and from different universities to discuss approaches for improving teaching and learning to promote minority groups in STEM degrees. The panel is well represented by women at different stages of their career which includes students and academics. Participants will gain a range of actionable advice on how they can implement strategies at their own institutions. Further, they will also get an overarching sense of the common themes involved in supporting minority groups in the STEM degrees