Absolute total cross-section measurements for electron collisions with tetrahydrofuran

The absolute total cross section (TCS) for electron collisions with tetrahydrofuran C4H8O in the gas phase has been measured using the linear transmission technique within 1-370 eV energy range. The total cross section function for e(-)-C4H8O collisions is characterized by the relatively high magnitude and the broad enhancement spanned between 4 and 12 eV, with some resonantlike structures. This enhancement can be explained as a result of overlapping core-excited resonances. At higher collision energies the magnitude of the measured total cross section monotonically decreases with the energy increase. At low impact energies some additional weak resonant features are visible near 1.9 and 3.5 eV. The reported TCS results are higher by 30% than recently published by Zecca [J. Phys. B 38, 2079 (1995)]. They are also distinctly different from the recent R-matrix calculations. At intermediate energy range the present data agree well with the sum of calculated elastic and ionization cross sections.