Eland J H D, Zagorodskikh S, Squibb R J, Mucke M, Sorensen S L, Feifel R
Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, United Kingdom.
Department of Physics and Astronomy, Uppsala University, 751 20 Uppsala, Sweden.
J Chem Phys. 2014 May 14;140(18):184305. doi: 10.1063/1.4872218.
Multi-coincidence experiments with detection of both electrons and ions from decay of core-excited and core-ionized states of CO2 confirm that O2(+) is formed specifically in Auger decay from the C1s-π* and O1s-π* resonances. Molecular rearrangement occurs by bending in the resonant states, and O2(+) is produced by both single and double Auger decay. It is suggested that electron capture by C(+) after partial dissociation in the doubly ionized core of excited CO2(+), formed by shake-up in spectator resonant Auger decay, accounts for high kinetic energy and high internal energy in some C + O2(+) fragments.
对二氧化碳核心激发态和核心电离态衰变产生的电子和离子进行双符合实验，证实了O2(+) 是在C1s-π* 和O1s-π* 共振的俄歇衰变中特异性形成的。分子重排通过共振态中的弯曲发生，O2(+) 由单重和双重俄歇衰变产生。有人提出，在旁观者共振俄歇衰变中的激发导致双电离核心中部分解离后，C(+) 捕获电子，这解释了一些C + O2(+) 碎片中的高动能和高内能。
