Possibility of resonant three-photon isotope-selective excitation of vibrational states with υ = 3 of the UF6 molecule mode ν 3 by radiation from two pulsed IR lasers in a gas-dynamically cooled molecular flow
| Autor: | G. N. Makarov |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Photon Isotope Mode (statistics) Statistical and Nonlinear Physics Selective excitation Radiation Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Free molecular flow law Molecule Electrical and Electronic Engineering Atomic physics |
| Zdroj: | Quantum Electronics. 51:643-648 |
| ISSN: | 1468-4799 1063-7818 |
| Popis: | We consider the possibility of resonant isotope-selective population of states with υ = 3 of the vibrational mode ν 3 of UF6 molecules as a result of three-photon bichromatic excitation of the molecules by IR radiation from two pulsed CF4 lasers and two pulsed para-H2 lasers. We propose specific schemes and analyse the possibility of exciting the 238UF6 and 235UF6 molecules into states with υ = 3 of the vibrational mode ν 3 using two CF4 lasers (or para-H2 lasers) generating in the region of 16 μm at frequencies that are significantly (by ∼3.5 – 17 cm−1) detuned from the linear absorption bands at the frequencies of ν 3 vibration of these molecules in a gas-dynamically cooled molecular flow. However, the sum of the doubled lasing frequency 2ν L1 of the first laser and the frequency ν L2 of the second laser is equal to a frequency of the transition υ = 0 → υ = 3 of the vibrational mode ν 3 of the UF6 molecules. When both laser pulses coincide in time, the possibility of selective excitation of UF6 molecules from the ground vibrational state with υ = 0 to the state with υ = 3 of the vibrational mode ν 3 is realised. The proposed schemes for the excitation of UF6 molecules to states with υ = 3 are compared with the previously implemented schemes for the effective excitation of states with υ = 3 of the vibrational mode ν 3 (F 1) and states with υ = 2 of the vibrational mode ν 3 (A 1) of SF6 molecules by three- and two-frequency radiation of pulsed CO2 lasers, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|