Femtosecond time-resolved fluorescence depletion spectroscopy was used in the study of the orientation relaxation of Rhodamine 700(LD700) and Oxazine 750(OX750) in DMSO. The anisotropy functions of the dye molecules w...Femtosecond time-resolved fluorescence depletion spectroscopy was used in the study of the orientation relaxation of Rhodamine 700(LD700) and Oxazine 750(OX750) in DMSO. The anisotropy functions of the dye molecules were obtained from the fluorescence depletion spectra, as the polarization of probe pulse is parallel and perpendicular respectively. The results show that the transition dipole moment of the pump and the probe of LD700 and OX750 are parallel. The time constants of the orientation relaxation of these dye molecules in DMSO are 1.8 and 1.9 ps for LD700 and OX750, respectively.展开更多
In a beam-beam scattering experAnent the excitation fUnctions of the reactions of alkallne earth metals with some polyatoAnc halldes (M+RX- MX+R) have been studied with Laser Induced Fluorescence (LIF) teclmique. At t...In a beam-beam scattering experAnent the excitation fUnctions of the reactions of alkallne earth metals with some polyatoAnc halldes (M+RX- MX+R) have been studied with Laser Induced Fluorescence (LIF) teclmique. At the variation range of the collision energies, the excitation functions can be taken asaR(ET) De In(1 + QMAX/ET)"where ET and QMAX are the coilision energy and the reaction exoergic energy, respectively,and n is a parameter which is correlative to the Illnner of the active vibrational modes in radical R during the reaction processes. Tab1e 2 gives the paramters of the excitation fUllctions for these reactions.展开更多
文摘Femtosecond time-resolved fluorescence depletion spectroscopy was used in the study of the orientation relaxation of Rhodamine 700(LD700) and Oxazine 750(OX750) in DMSO. The anisotropy functions of the dye molecules were obtained from the fluorescence depletion spectra, as the polarization of probe pulse is parallel and perpendicular respectively. The results show that the transition dipole moment of the pump and the probe of LD700 and OX750 are parallel. The time constants of the orientation relaxation of these dye molecules in DMSO are 1.8 and 1.9 ps for LD700 and OX750, respectively.
文摘In a beam-beam scattering experAnent the excitation fUnctions of the reactions of alkallne earth metals with some polyatoAnc halldes (M+RX- MX+R) have been studied with Laser Induced Fluorescence (LIF) teclmique. At the variation range of the collision energies, the excitation functions can be taken asaR(ET) De In(1 + QMAX/ET)"where ET and QMAX are the coilision energy and the reaction exoergic energy, respectively,and n is a parameter which is correlative to the Illnner of the active vibrational modes in radical R during the reaction processes. Tab1e 2 gives the paramters of the excitation fUllctions for these reactions.
