A photoelectron spectroscopic study of the second ionisation of the CF(X2Π) radical

A study of the CF radical with PE and CIS spectroscopy: investigation of Rydberg states above the first ionization threshold

“…Bands associated with the six ionizations CF þ ( 1,3 AE þ ) CF(X 2 Å), CF þ ( 1,3 Á) CF(X 2 Å) and CF þ ( 1,3 AE À ) CF(X 2 Å) arising from the 1 level have not been observed. They are expected above 18.5 eV [6][7][8] and the ionic states are expected to be dissociative [8]. Far fewer theoretical studies have been performed on CF compared to NO.…”

“…The CF þ (X 1 AE þ ) CF(X 2 Å) ionization arising from one-electron removal from the 2 level has been recorded as a vibrationally structured band with an adiabatic ionization energy (AIE) of 9.11 AE 0.02 eV and a vertical ionization energy (VIE) of 9.55 AE 0.02 eV (6). For one-electron removal from the 5 level, the CF þ (a 3 Å) CF(X 2 Å) ionization has been observed as a vibrationally structured band with the AIE equal to the VIE at 13.94 AE 0.02 eV [7]. The associated CF þ (A 1 Å) CF(X 2 Å) ionization has not been observed because the A 1 Å ionic state is effectively dissociative [7].…”

“…For one-electron removal from the 5 level, the CF þ (a 3 Å) CF(X 2 Å) ionization has been observed as a vibrationally structured band with the AIE equal to the VIE at 13.94 AE 0.02 eV [7]. The associated CF þ (A 1 Å) CF(X 2 Å) ionization has not been observed because the A 1 Å ionic state is effectively dissociative [7]. Bands associated with the six ionizations CF þ ( 1,3 AE þ ) CF(X 2 Å), CF þ ( 1,3 Á) CF(X 2 Å) and CF þ ( 1,3 AE À ) CF(X 2 Å) arising from the 1 level have not been observed.…”

“…This is the same as NO but with the 5 and 1 orbitals interchanged in energy order. Some studies have already been made on CF with photoelectron spectroscopy (PES) [6,7]. The 2, 5 and 1 valence orbitals are accessible with the HeI (21.22 eV) radiation but only the (2) À1 and (5) À1 ionizations have been observed by PES [6,7].…”

“…Some studies have already been made on CF with photoelectron spectroscopy (PES) [6,7]. The 2, 5 and 1 valence orbitals are accessible with the HeI (21.22 eV) radiation but only the (2) À1 and (5) À1 ionizations have been observed by PES [6,7]. The CF þ (X 1 AE þ ) CF(X 2 Å) ionization arising from one-electron removal from the 2 level has been recorded as a vibrationally structured band with an adiabatic ionization energy (AIE) of 9.11 AE 0.02 eV and a vertical ionization energy (VIE) of 9.55 AE 0.02 eV (6).…”