Electron Scattering Time-of-Flight Studies of Electron Impact Excitation of CO, N$_{\mathrm{2}}$ and H$_{\mathrm{2}}$O

Experimental inelastic to elastic scattering ratios of electron scattering from gaseous CO, N$_{\mathrm{2}}$ and H$_{\mathrm{2}}$O are presented from near-threshold excitation incident electron energies to 30eV and for scattering angles of 20$^{\mathrm{o}}$ to 130$^{\mathrm{o}}$. The measurements were taken with a time-of-flight electron spectrometer [1]. They will be presented together with existing high resolution electrostatic electron spectrometer measurements of our laboratory and those of [2,3,4]. Comparisons to existing theoretical cross sections will also be presented [5]. [1] M. Zawadzki \textit{et al}. Phys. Rev. A \textbf{97} 050702(R) (2018). [2] J. Zobel et al., J. Phys. B, \textbf{29} 813 (1996). [3] P. W. Zetner et al., J. Phys. B, \textbf{31} 2395 (1998). [4] A. G. Middleton et al., J. Phys. B, 26 1743 (1993). [5] On-going collaboration: R-Matrix calculations of Drs. Jonathan Tennyson (UCL, London), Amar Dora (N. Orrisa University, India) and Zdenek Masin (Charles University, Prague).