Absolute cross sections for dissociative electron attachment to acidic molecules

The molecules studied span the range from very strong to very weak acids, $i.e.$, HCl and HBr, HCOOH, CH$_3 $OH, HCN and C$_2$H$_2$, including the deuterated isotopomers. The results are compared to available calculations where available -- the nonlocal resonance model [1] for diatomics, the \textit{ab initio} truly three dimensional calculation for HCN and C$_2$H$_2$ [2] and the pseudo-diatomic $R$-matrix calcualtion for HCOOH [3]. The step-like structures at openings of the X-H stretch vibrational excitation channels are characteristic for the stronger acids, but absent for the weak acids. Structure due to vibrational excitation of the CN$^-$ fragment is observed for HCN.\\[4pt] [1] J.~Fedor, C.~Winstead, V. McKoy, M.~Cizek, K.~Houfek, P.~Kolorenc, J.~Horacek, Phys. Rev. A \textbf{81}, 042702 (2010).\\[0pt] [2] S.~Chourou, A.~Larson, A.~E.~Orel, J. Phys.: Conf. Ser. \textbf{204 }, 012001 (2010).\\[0pt] [3] G.~A.~Gallup, P.~D.~Burrow, I.~I.~Fabrikant, Phys. Rev. A \textbf{79}, 042701 (2009).