Beta is a high resolution DC slice velocity map imaging machine on which many state-selected photodissociation experiments have been performed, including the formaldehyde investigation that revealed the roaming mechanism. Beta has also been the venue for many studies of photo fragment atomic orbital polarization.
C. D. Foley, C. Xie, H. Guo, A. G. Suits, “Orbiting Resonances in Formaldehyde Reveal Coupling of Roaming, Radical and Molecular Channels,” Science (2021) 374, 1122-1127.
C. D. Foley, G. A. Cooper, J. Tu, M. Harmata and A. G. Suits, “HDCO Radical dissociation thresholds by velocity map imaging,” Mol. Phys. (2020) DOI: 10.1080/00268976.2020.1813344
C. Weeraratna, O. S. Vasyutinskii, and A. G. Suits, “Photodissociation by Circularly Polarized Light Yields Photofragment Alignment Arising Solely from Vibronic Interactions,” Phys. Rev. Lett. (2019) 122, 083403. DOI: 10.1103/PhysRevLett.122.083403