Metastable a 3Π 13CO: Molecular‐Beam Electric‐Resonance Measurements of the Fine Structure, Hyperfine Structure, and Dipole Moment

1971 ◽  
Vol 54 (5) ◽  
pp. 2136-2150 ◽  
Author(s):  
R. H. Gammon ◽  
R. C. Stern ◽  
M. E. Lesk ◽  
B. G. Wicke ◽  
W. Klemperer
Keyword(s):  
Dipole Moment ◽  
Fine Structure ◽  
Hyperfine Structure ◽  
Molecular Beam ◽  
Electric Resonance

Hyperfine Structure of 7Li79,81Br by Molecular‐Beam Electric Resonance

1972 ◽  
Vol 56 (2) ◽  
pp. 855-861 ◽  
Author(s):  
R. C. Hilborn ◽  
T. F. Gallagher ◽  
N. F. Ramsey
Keyword(s):  
Hyperfine Structure ◽  
Molecular Beam ◽  
Electric Resonance

Avoided-crossing molecular-beam spectroscopy of symmetric tops. I. Phosphoryl fluoride (OPF3)

1981 ◽  
Vol 59 (1) ◽  
pp. 150-171 ◽  
Author(s):  
Irving Ozier ◽  
W. Leo Meert
Keyword(s):  
Dipole Moment ◽  
Molecular Beam ◽  
Wave Functions ◽  
Matrix Elements ◽  
Centrifugal Distortion ◽  
Electric Resonance ◽  
Avoided Crossing ◽  
Mixing Matrix ◽  
The Individual

A new avoided-crossing technique using a conventional molecular beam electric resonance spectrometer has been developed for studying symmetric rotors. By means of an external electric field, two levels with different values of K are made nearly degenerate and normally forbidden electric-dipole transitions between the interacting levels are observed. Mixing matrix elements ηST with ΔK = ± 3 arise from the centrifugal distortion dipole moment μD and mixing terms ηHYP, with ΔK = ± 1, ± 2 arise from the nuclear hyperfine Hamiltonian. Explicit expressions for ηHYP are given in an Appendix. Many of these terms break the symmetry of both the rotational and nuclear spin parts of the wave functions. The avoided-crossing method is discussed in detail, with emphasis on its application to the measurement of (A0–B0). It is shown how the technique can be used to determine the perpendicular moment μD, as well as μJ, and μK, the constants which characterize the dependence of the parallel dipole moment μ on J and K, respectively. Other applications include the experimental investigation of the selection rules for the individual terms in ηHYP and the determination of the sign of the rotational g-factors [Formula: see text] and [Formula: see text].∙The method has been applied to phosphoryl fluoride (OPF3). It has been determined that (A0–B0) = 217.4987(44) MHz, μD = 5.856(20) × 10−6 D, μJ = −3.38(10) × 10−6 D, and both [Formula: see text] and [Formula: see text] are negative.

Electric dipole moment of X2Π OH and OD in several vibrational states

1984 ◽  
Vol 62 (12) ◽  
pp. 1502-1507 ◽  
Author(s):  
K. I. Peterson ◽  
G. T. Fraser ◽  
W. Klemperer
Keyword(s):  
Dipole Moment ◽  
Electric Dipole ◽  
Vibrational State ◽  
Molecular Beam ◽  
Dipole Moments ◽  
Vibrational States ◽  
Electric Resonance ◽  
Resonance Technique ◽  
The Difference ◽  
Theoretical Results

Dipole moments are measured for OH (2Π) in the ν = 0, 1, and 2 vibrational states and for OD in the ν = 0 and 1 states using the molecular beam electric resonance technique. These are listed in the table below.[Formula: see text]A very accurate value of 0.00735(7) D is obtained for the difference in dipole moments between the ν = 0 and 1 vibrational states of OH. This is within 20% of the best theoretical results. The dependence on vibrational state is very nonlinear, which is also in agreement with theoretical results. Finally, the difference between the ν = 0 dipole moments of OH and OD is close to the expected value.

Molekülstrahl-Resonanz-Messungen von Hyperfeinstruktur, Zeeman-und Stark-Effekt an TlCl-Isotopen in verschiedenen Schwingungszuständen / Molecular Beam Resonance Measurements of Hyperfine Structure, Zeeman- and Stark-Effect of TICl-lsotopes in Different Vibrational States

1972 ◽  
Vol 27 (1) ◽  
pp. 77-91 ◽  
Author(s):  
R. Ley ◽  
W. Schauer
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Hyperfine Structure ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Molecular Beam ◽  
Stark Effect ◽  
Zeeman Effect ◽  
Magnetic Shielding ◽  
Vibrational States

AbstractHyperfine structure, Stark effect and Zeeman effect of the TlCl molecule have been measured with a molecular beam apparatus using electric four poles as deflecting fields and a homogeneous electric field parallel to a superimposed magnetic field in the transition region. Electric dipole transitions were induced between the hyperfine structure levels of the first rotational state J = 1 in both strong and weak external field.The following quantities could be evaluated from the spectra: the electric dipole moment µel and the magnetic rotational dipole moment µJ of the molecule, the nuclear spin-rotational interactions c1 and c2, the scalar and tensor part of the nuclear dipole-dipole interaction dS and dT, the quadrupole coupling constant e q Q of the Cl nucleus, the anisotropy of the magnetic susceptibility ξ⊥− ξ∥ , the anisotropy of the magnetic shielding of the external magnetic field at the position of both nuclei (σ⊥- σ∥)1 and (σ⊥- σ∥)2, the magnetic moment of the Cl nucleus multiplied by the scalar part of the magnetic shielding tensor µ2 · (1 - σS)2. For the most abundant isotop 205Tl35Cl the vibrational dependence of most of these quantities was measured in the vibrational states v =0, 1, 2, 3. Isotopic effects for 203Tl35Cl, 205Tl37Cl and 203Tl37Cl were investigated in the ground vibrational state. In addition the vibrational dependence of the electric dipole moment was measured for all isotopic species.It is pointed out that the usual connections between (σ⊥- σ∥)1,2 and c1,2 and between ξ⊥− ξ∥ and µJ do not hold when the excited electronic states of the molecule obey Hund’s coupling case c, which occurs most probably in TlCl.

Stark-zeeman hyperfine structure of H79 Br and H81 Br by molecular-beam electric-resonance spectroscopy

1973 ◽  
Vol 2 (4) ◽  
pp. 473-477 ◽  
Author(s):  
O.B. Dabbousi ◽  
W.L. Meerts ◽  
F.H. de Leeuw ◽  
A. Dymanus
Keyword(s):  
Hyperfine Structure ◽  
Molecular Beam ◽  
Resonance Spectroscopy ◽  
Electric Resonance

ROTATIONAL SPECTRA OF RbF BY THE ELECTRIC RESONANCE METHOD

1958 ◽  
Vol 36 (2) ◽  
pp. 171-183 ◽  
Author(s):  
H. Lew ◽  
D. Morris ◽  
F. E. Geiger Jr. ◽  
J. T. Eisinger
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Internuclear Distance ◽  
Electric Dipole ◽  
Molecular Beam ◽  
Resonance Method ◽  
Mass Ratio ◽  
Electric Resonance ◽  
Rotational States ◽  
Rotational Spectra

Transitions between the J = 0 and J = 1 rotational states of RbF have been measured by means of the molecular beam electric resonance method. The following rotational constants have been determined (all frequencies in Mc./sec):[Formula: see text]The quadrupole interaction constants −eqQ/h in the J = 1 state are found to be[Formula: see text]The equilibrium internuclear distance is re = (2.26554 ± 0.00005) × 10−8 cm. The electric dipole moment of Rb85F in the ν = 0 state is μ = (8.80 ± 0.10) × 10−18 e.s.u. The mass ratio of the Rb isotopes is M85/M87 = 0.9770148 ± 0.0000052.

ROTATIONAL SPECTRUM OF K39F BY THE MOLECULAR BEAM ELECTRIC RESONANCE METHOD

1960 ◽  
Vol 38 (3) ◽  
pp. 482-494 ◽  
Author(s):  
G. W. Green ◽  
H. Lew
Keyword(s):  
Dipole Moment ◽  
Quadrupole Interaction ◽  
Electric Dipole Moment ◽  
Internuclear Distance ◽  
Electric Dipole ◽  
Molecular Beam ◽  
Resonance Method ◽  
Rotational Spectrum ◽  
Electric Resonance ◽  
Rotational States

Transitions between the J = 0 and J = 1 rotational states of K39F have been measured by means of the molecular beam electric resonance method. The following rotational constants have been determined (all frequencies in Mc/sec):[Formula: see text]The quadrupole interaction constants eqQ as measured in the J = 1 state are found to be[Formula: see text]The equilibrium internuclear distance obtained directly from Be is[Formula: see text]The electric dipole moment in the ν = 0 state is[Formula: see text]

ROTATIONAL CONSTANTS AND ELECTRIC DIPOLE MOMENT OF NaF

1963 ◽  
Vol 41 (9) ◽  
pp. 1461-1469 ◽  
Author(s):  
R. K. Bauer ◽  
H. Lew
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Molecular Beam ◽  
Resonance Method ◽  
Interaction Constant ◽  
Spin Rotation ◽  
Vibrational States ◽  
Electric Resonance ◽  
Rotational Constants

Transitions between the J = 0 and J = 1 rotational levels of Na23F19 have been measured by the molecular beam electric resonance method in the three lowest vibrational states. The following rotational constants have been determined (all frequencies in Mc/sec):[Formula: see text]The Na quadrupole interaction constants in the J = 1 level are:[Formula: see text]The spin-rotation interaction constant for Na in the J = 1 level for ν = 0, 1, and 2 is[Formula: see text]The equilibrium internuclear distance computed directly from Be is[Formula: see text]The electric dipole moment is:[Formula: see text]

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