science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: 2-butyn-1-yl radical Other Names: 2-butynyl Formula: C4H5 CAS-No.: 82252-88-8 PubChem: CID 144982 Study: photoionization spectrum Authors: H.R. Hrodmarsson, J.-C. Loison, U. Jacovella, D.M.P. Holland, S. Boyé-Péronne, B. Gans, G.A. Garcia, L. Nahon, S.T. Pratt Title: Valence-Shell Photoionization of C4H5: The 2-Butyn-1-yl Radical Journal/Source: J. Phys. Chem. A, 123 (8), 1521–1528, (2019); DOI: 10.1021/acs.jpca.8b11809 Data: table, diagram Energy/Wavelength range: 7.7 - 11.0 eV (~ 112.7 - 161 nm) Resolution: 0.005 eV Temperature: 298 K Temperature dependence: no Pressure/Concentration: Phase: gas pH: Comments: A determination of the absolute photoionization cross section of the 2-butyn-1-yl radical at 9.7 eV is also reported: sigma(C4H5) = 6.1 ± 1.8 Mb. Author to whom correspondence should be addressed: (e-mail address):