Forbidden transitions in molecular vibrational-rotational spectroscopy

1989 ◽  
Vol 54 (10) ◽  
pp. 2555-2630 ◽  
Author(s):  
Dušan Papoušek
Keyword(s):  
Magnetic Dipole ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Physical Nature ◽  
Electric Quadrupole ◽  
Rotational Spectroscopy ◽  
Quadrupole Moments ◽  
Electric Dipole Moments ◽  
Selection Rules ◽  
Rotational States

A review is given of the forbidden ( more precisely: perturbation allowed) transistions between molecular vibrational-rotational states including transistions which are induced by the electric dipole and quadrupole moments and the magnetic dipole moment. The basic theory of these transistions is outlined starting with the overall symmetry selection rules, followed by the discussion of the spin statistics isomers, approximate selection rules for the usual vibrational-rotational transistions, and forbidden transistions induced by the electric quadrupole and magnetic dipole moments. Forbidden transistions due to the vibrationally and rotationally induced electric dipole moments are the discussed in detail for symmetric top and spherical top molecules with the emphasis on the physical nature of the various phenomena leading to these transistions. A summary is also given of the most important experimental work on the forbidden transistions in diatomic molecules and polar as well as nonpolar polyatomics.

Molecular g-Values, Magnetic Susceptibility Anisotropies, Molecular Quadrupole Moments and Second Moments of the Electron Charge Distribution in Ethyleneoxide and Pyridine Isotopes. An Attempt to Determine the Sign of the Electric Dipole Moment

1976 ◽  
Vol 31 (3-4) ◽  
pp. 265-271 ◽  
Author(s):  
E. Hamer ◽  
D. H. Sutter
Keyword(s):  
Dipole Moment ◽  
Electric Dipole ◽  
High Field ◽  
Dipole Moments ◽  
Zeeman Effect ◽  
Quadrupole Moments ◽  
Electron Charge ◽  
Electric Dipole Moments ◽  
Second Moments ◽  
Electron Charge Distribution

The high-field first and second order Zeeman effect has been observed in Ethyleneoxidein order to determine the sign of the electric dipole moments from the g-values of different isotopes. The experimental data indicate that in Ethyleneoxide the negative end is at the Oxygen while in Pyridine the result is not conclusive. The effect of vibrations is discussed in some detail and it is concluded that the vibrational dependance of the g-values should be accounted for if the sign of the dipole moment is determined from Zeeman data (at least if H ↔ D substitutions are involved).

The magnetic dipole and electric quadrupole moments of dysprosium 161 and 163

1958 ◽  
Vol 245 (1240) ◽  
pp. 118-127 ◽  
Keyword(s):  
Magnetic Dipole ◽  
Ground State ◽  
Axial Symmetry ◽  
Dipole Moments ◽  
Electric Quadrupole ◽  
Magnesium Nitrate ◽  
Quadrupole Moments ◽  
Nuclear Spins ◽  
Paramagnetic Resonance ◽  
Electronic Ground

Paramagnetic resonance has been observed at 4.2 °K and a wavelength of 3.1 cm in magnetically dilute crystals of the acetate and double magnesium nitrate of dysprosium. Values for the nuclear spins and nuclear magnetic dipole moments of the odd isotopes 161 Dy and 163 Dy have been deduced from the spectrum in dysprosium acetate, although the spectrum does not have axial symmetry and cannot be analyzed in detail. More reliable values for these moments have been obtained from the spectrum of dysprosium double nitrate, which has axial symmetry. It has also been possible to make an approximate calculation of the electronic ground state of dysprosium ions in this salt and estimate the nuclear electric quadrupole moments. The values of the moments are: 161 µ = — 0.37 ± 0.04 n.m .; 163 µ = + 0.51 ± 0.06 n.m .; and, in units of 10 -24 cm 2 , 161 Q = + 1.1 ± 0.4; 163 Q = + 1.3 ± 0.4. For each isotope, only the relative signs of the two moments were determined experimentally; the signs quoted above are suggested as the most probable ones.

scholarly journals Studies on the anomalous magnetic and electric dipole moments of the tau-neutrino in pp collisions at the LHC

2019 ◽  
Vol 55 (8) ◽  
Author(s):  
A. Gutiérrez-Rodríguez ◽  
M. Köksal ◽  
A. A. Billur ◽  
M. A. Hernández-Ruíz
Keyword(s):  
Electric Dipole ◽  
Dipole Moments ◽  
Pp Collisions ◽  
Electric Dipole Moments ◽  
Tau Neutrino

scholarly journals Electric dipole moment constraints on CP-violating heavy-quark Yukawas at next-to-leading order

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Joachim Brod ◽  
Emmanuel Stamou
Keyword(s):  
Electric Dipole ◽  
Anomalous Dimension ◽  
Phenomenological Study ◽  
Dipole Moments ◽  
Charm Quark ◽  
Leading Order ◽  
Logarithmic Order ◽  
Electric Dipole Moments ◽  
Yukawa Couplings ◽  
Experimental Bound

Abstract Electric dipole moments are sensitive probes of new phases in the Higgs Yukawa couplings. We calculate the complete two-loop QCD anomalous dimension matrix for the mixing of CP-odd scalar and tensor operators and apply our results for a phenomenological study of CP violation in the bottom and charm Yukawa couplings. We find large shifts of the induced Wilson coefficients at next-to-leading-logarithmic order. Using the experimental bound on the electric dipole moments of the neutron and mercury, we update the constraints on CP-violating phases in the bottom and charm quark Yukawas.

scholarly journals Left-right symmetry and electric dipole moments. A global analysis

2021 ◽  
Vol 815 ◽  
pp. 136136
Author(s):  
Michael J. Ramsey-Musolf ◽  
Juan Carlos Vasquez
Keyword(s):  
Electric Dipole ◽  
Dipole Moments ◽  
Global Analysis ◽  
Electric Dipole Moments
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