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21 Απρ 2022 · This evaluation reveals that the transition moment depends on the square of the dipole moment of the molecule, μ2 and the rotational quantum number, J, of the initial state in the transition, μT = μ2 J + 1 2J + 1. and that the selection rules for rotational transitions are. ΔJ = ± 1. ΔmJ = 0, ± 1.
30 Οκτ 2024 · To distinguish between interacting and non-interacting molecules, the scientists illuminated liquid water with femtosecond (one quadrillionth of a second) laser pulses in the near-infrared spectrum. These ultra-short bursts of light create tiny charge oscillations and atomic displacements in the water, which trigger the emission of visible light.
The mechanisms by which colors are produced in solutions and solids containing molecules and ions can be understood by quantum chemistry. The wavelengths of infrared and microwave radi-ation that are absorbed or emitted by water and carbon monoxide molecules can be calculated by quantum chemical theories.
17 Αυγ 2006 · This paper discusses recent progress that has been made in the understanding of the electronic structure and bonding situation of carbon monoxide which was analyzed using modern quantum chemical methods.
1 Ιαν 2014 · Collision-induced electron removal from a water molecule produces four different singly charged ions (H 2 O +, H +, OH +, and O +) and five different multi-charged oxygen ions.
Examples of radio spectral lines include recombination lines of ionized hydrogen and heavier atoms, rotational lines of polar molecules such as carbon monoxide (CO), and the λ = 21 cm hyperfine line of interstellar H i.
These arrows indicate the absorption or emission of energy during the transition. The energy levels are typically labeled with their corresponding quantum numbers, such as the principal quantum number (n) and the total angular momentum quantum number (j).
