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- W2067666470 abstract "Abstract The notion that certain transitions of molecules with intramolecular large amplitude motions exhibit an enhanced sensitivity to the proton-to-electron mass ratio variation is changing the paradigm for searching for drifting constants from the optical to the microwave domain. It also stimulates a search for the new molecules that possess enhanced sensitivities to a variation of the proton-to-electron mass ratio. In this paper, we calculate the sensitivity coefficients for acetone, a molecule of astrophysical interest having a C 2v equilibrium configuration with two equivalent methyl tops undergoing internal rotation. The calculations were done for rotational transitions belonging to the ground and the first excited ( ν 12 ≈ 75 cm −1 ) torsional states of acetone, since both these states were detected during observations of interstellar molecular clouds. For rotational transitions with linestrengths above 1.0 and lower-level rotation excitation energies below 10 cm −1 the sensitivity coefficients in this molecule range from K μ = −0.69 to −1.23 for the ground state and from K μ = −1.98 to +6.07 for the first excited torsional state." @default.
- W2067666470 created "2016-06-24" @default.
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- W2067666470 date "2014-06-01" @default.
- W2067666470 modified "2023-09-25" @default.
- W2067666470 title "Sensitivity to a possible variation of the proton-to-electron mass ratio of torsion–rotation transitions in acetone (CH3)2CO" @default.
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- W2067666470 doi "https://doi.org/10.1016/j.jms.2014.03.004" @default.
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