The ionization energy of C2
Copyright policy )The ionization energy of C2
Resonant two-photon threshold ionization spectroscopy is employed to determine the ionization energy of C2 to 5 meV precision, about two orders of magnitude more precise than the previously accepted value. Through exploration of the ionization threshold after pumping the 0–3 band of the newly discovered 43Πg←a3Πu band system of C2, the ionization energy of the lowest rovibronic level of the a3Πu state was determined to be 11.791(5) eV. Accounting for spin-orbit and rotational effects, we calculate that the ionization energy of the forbidden origin of the a3Πu state is 11.790(5) eV, in excellent agreement with quantum thermochemical calculations which give 11.788(10) eV. The experimentally derived ionization energy of X1Σg+ state C2 is 11.866(5) eV.
- University of Sydney Australia
- The University of Texas at Austin United States
- UNSW Sydney Australia
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34 Chemical Sciences, anzsrc-for: 5102 Atomic, Molecular and Optical Physics, 530, anzsrc-for: 34 Chemical Sciences, anzsrc-for: 02 Physical Sciences, anzsrc-for: 40 Engineering, 5102 Atomic, anzsrc-for: 3406 Physical Chemistry, 3406 Physical Chemistry, 7 Affordable and Clean Energy, anzsrc-for: 09 Engineering, anzsrc-for: 51 Physical Sciences, 51 Physical Sciences, anzsrc-for: 03 Chemical Sciences
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