Enhanced Sensitivity to the Time Variation of the Fine-Structure Constant and m{sub p}/m{sub e} in Diatomic Molecules
- School of Physics, University of New South Wales, Sydney, 2052 (Australia)
- Petersburg Nuclear Physics Institute, Gatchina, 188300 (Russian Federation)
Sensitivity to temporal variation of the fundamental constants may be strongly enhanced in transitions between narrow close levels of different nature. This enhancement may be realized in a large number of molecules due to cancellation between the ground state fine-structure {omega}{sub f} and vibrational interval {omega}{sub v} [{omega}={omega}{sub f}-n{omega}{sub v}{approx_equal}0, {delta}{omega}/{omega}=K(2{delta}{alpha}/{alpha}+0.5{delta}{mu}/{mu}), K>>1, {mu}=m{sub p}/m{sub e}]. The intervals between the levels are conveniently located in microwave frequency range and the level widths are very small. Required accuracy of the shift measurements is about 0.01-1 Hz. As examples, we consider molecules Cl{sup +}{sub 2}, CuS, IrC, SiBr, and HfF{sup +}.
- OSTI ID:
- 21024255
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.99.150801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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