A photodissociation study of 1,3‐butadiene Academic Article uri icon


  • Laser-ion beam photodissociation is used to study the C4H 6+ radical cation formed by electron impact (70 eV nominal energy) ionization of 1,3-butadiene. The kinetic energy release value obtained from C4H6+ → C3H 3+ + CH3 does not agree with the distribution reported by Farrar [J. Chem. Phys. 77, 263 (1982)]. The photodissociation studies of C4H6+ suggest the existence of a long-lived (> 0.05 × 10-6 s) photoexcited C 4H6+ ion. Also, results of photodissociation studies of C4H6+ trapped in the electron beam space charge are consistent with the proposed long-lived photoexcited C 4H6+ ion. Therefore, it is proposed that the two-photon photodissociation of C4H6+ reported by Baer [J. Chem. Phys. 85, 6361 (1986)] is a sequential two-step process involving a long-lived excited C4H6+ ion. © 1988 American Institute of Physics.

author list (cited authors)

  • Sellers‐Hann, L., Krailler, R. E., & Russell, D. H.

citation count

  • 4

publication date

  • July 1988