從C3Ar凡德瓦爾分子研究分子內能量轉移機制

This proposal is a two-year project. Its main theme (1 and 2) is to apply laserspectroscopic techniques to follow the energy transfer processes, to find thepropensity rules of the vibrational predissociation processes of the opticallyexcited C3Ar complex and to test the existing energy gap law and momentumgap law.1.The first half of the first year is to complete the collections and analyses of theemission spectra from the C3Ar levels lying above 1085 cm-1 such as complexlevels associated with 100, 002, 0 4+ 0 and 0 8- 0 of C3. The second half of thefirst year is proposed to use (fluorescence depletion) stimulated emissionpumping technique to obtain the rotational distribution of the C3, à 07-0, Δg/Σgfragment from the vibrational predissociation of C3Ar near the 0 8- 0 vibrationallevel of C3 and to obtain the spectroscopic constants of the odd quanta levels ofthe bending vibration of the ground electronic state of C3.2.The first half of the second year is to apply the two-color four-wave mixing toobtain the rotational distribution of the vibrational predissociation of the 25503.75cm-1 band of C3Ar. This band has been previously analyzed to undergo the VV/T type predissociation. Other than this, we have little information. The secondhalf of The second year is to resolve the rotational distribution of C3, à 1 2-0 Πu,1 1-0 Δg/Σg, 0 7- 0 Δg fragments from the Ar-complex level associated with à 00 2 of C3 by (fluorescence depletion) stimulated emission pumping technique。 Iftime permits, the two-color four-wave mixing technique will be used to search forthe energy transfer processes of C3Ar, associated with à 0 0 2 of C3， and thevibrational level structure of the ground electronic state of the complex。3.If budget of the man power is granted, the 4Π–a4Σi system of ScC radical willbe reexamined to obtain the hyperfine structures. Plasma emission in the near infrared region will be recorded to search for the transitions of ScCC and VCC.