The 1 + 1 resonant multiphoton ionization spectrum of the allyl radical. Rotational structure in the ~C[22B1] .fwdarw. ~X[12A2] origin band

Kinetics and dynamics in the photodissociation of the allyl radical

“…An example of such a system is the allyl radical, whose spectroscopy has been the subject of earlier studies in our group. 1 A large number of vibronic bands between 250 and 240 nm was identified by resonant multiphoton ionization ͑MPI͒ and assigned to the B, C, and D states of allyl, which are strongly coupled to each other. No fluorescence has been observed from these states despite the very large oscillator strength of at least one of them.…”

The nonradiative decay of the allyl radical excited B 2A1 state studied by picosecond time-resolved photoelectron spectroscopy

“…Resonance Raman spectra from these states were also recorded, 6 but no fluorescence has been observed, despite the large oscillator strength calculated for the C←X transition, 7 indicating short lifetimes. MPI experiments on the other hand revealed a partially resolved rotational K a structure 4 for several vibronic bands with a linewidth of 1 cm…”

Single-photon and resonance-enhanced multiphoton threshold ionization of the allyl radical

“…The electronic spectrum of allyl has been studied extensively and the structural and dynamic properties of many vibronically excited states of allyl have been characterized by optical spectroscopy. [1][2][3][4][5][6] The ground electronic state of allyl has also been investigated by electron spin resonance ͑ESR͒ spectroscopy. 7,8 From these ESR studies and theoretical investigations, 9 the spin density in the ground state radical was determined to be mainly localized at the terminal carbon atoms.…”