scholarly journals Nuclear Spin-Dependent Effects of Parity Nonconservation in Ortho-H2

Symmetry ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 141
Author(s):  
Dmitry V. Chubukov ◽  
Leonid V. Skripnikov ◽  
Leonti N. Labzowsky ◽  
Günter Plunien
Keyword(s):  
Nuclear Spin ◽  
Molecular System ◽  
Nuclear Interaction ◽  
Theoretical Treatment ◽  
Parity Nonconservation ◽  
Coupling Constant ◽  
Weak Current ◽  
Theoretical Simulation ◽  
Neutral Weak Current ◽  
Dependent Interaction

We report a theoretical treatment of the nuclear spin-dependent spatial parity nonconserving (NSD-PNC) electron–nuclear interaction effect in the diatomic homonuclear ortho-H 2 molecule. The magnetic dipole transition between v = 1 and v = 0 vibrational sublevels of the ground 1 Σ g + state is examined. The orthohydrogen molecule is a unique molecular system where the parity nonconserving (PNC) nuclear spin-dependent interaction due to the neutral weak currents can be directly observed and the corresponding coupling constant can be extracted from the future experiments. The theoretical simulation shows that using the cavity-enhanced scheme in conjunction with the record achievement of the intracavity absorption spectroscopy, the experiment on the observation of the NSD-PNC effect due to the neutral weak current in ortho-H 2 looks feasible.

The proximate spin–spin coupling, 5J(F,CH3), as a quantitative conformational indicator in alkylfluorobenzenes and related compounds

1986 ◽  
Vol 64 (8) ◽  
pp. 1602-1606 ◽  
Author(s):  
Ted Schaefer ◽  
Rudy Sebastian ◽  
Glenn H. Penner ◽  
S. R. Salman
Keyword(s):  
Nuclear Spin ◽  
Spin Coupling ◽  
Torsional Angle ◽  
Rotational Behaviour ◽  
Coupling Constant ◽  
Spin Coupling Constant ◽  
Spin Spin Coupling ◽  
Torsional Potentials ◽  
Derivatives Of ◽  
Related Compounds

The through-space or proximate nuclear spin–spin coupling constant, 5J(F,CH3) = 5J, between methyl protons and ring fluorine nuclei in alkylfluorobenzenes is postulated as [Formula: see text] θ being the torsional angle for the [Formula: see text] bond. A and B are obtained from the known internal rotational behaviour in 2,6-difluoroethylbenzene and the corresponding cumene derivative. The parameterization is tested on the observed 5J in derivatives of 2,4,6-tri-tert-butyl- and 2,4,6-tri-isopropyl-fluorobenzene, in 2-chloro-6-fluoroisopropylbenzene, 2,6-difluoro-α-methylstyrene, and N-methyl-8-fluoroquinolinium halides. A prediction is made for 5J in 2,6-difluoro-tert-butylbenzene. It appears that the present parameterization allows the derivation of approximate torsional potentials from proximate couplings, for example in α,α-dimethyl-2,6-difluorobenzyl alcohol.

scholarly journals A Theory of Neutral Weak Current

1970 ◽  
Vol 44 (4) ◽  
pp. 1092-1094
Author(s):  
Syurei Iwao
Keyword(s):  
Weak Current ◽  
Neutral Weak Current

Sub-Doppler Measurements and Rotational Spectrum of 13C18O

2000 ◽  
Vol 55 (3-4) ◽  
pp. 441-443 ◽  
Author(s):  
G. Klapper ◽  
F. Lewen ◽  
S. P. Belova ◽  
G. Winnewisser
Keyword(s):  
Nuclear Spin ◽  
Rotational Spectrum ◽  
Coupling Constant ◽  
Frequency Range ◽  
Experimental Accuracy ◽  
Rotational Transitions ◽  
Line Positions

The rotational spectrum of 13C18O has been measured up to 1 THz. The lowest rotational transitions of 13C18O (J =2←1 to J = 6 ← 5) have been measured by saturation-dip spectroscopy with an experimental accuracy of 2 kHz. These five low J rotational transitions cover the frequency range between 209 and 628 GHz. The narrow linewidths of about 20 kHz of the saturation dips allowed to resolve the two main hyperfine components. The splitting is caused by coupling of the 13C nuclear spin with the rotation of the molecule. The appropriate coupling constant C1(13C18O) is 33.90(81) kHz. In addition we have measured in the Doppler limited mode, the line positions of the rotational transitions J = 7 ← 6 , J = 8 ← 7 , and J = 9 ← 8 with accuracies of 5 kHz. We provide a set of improved constants together with frequency predictions up to 4.1 THz (J = 40 ← 39)

Lifetime and Hyperfineinteraction in 1P1 States with Nuclear Spin I =1/2

1981 ◽  
Vol 36 (7) ◽  
pp. 694-696
Author(s):  
H. Liening
Keyword(s):  
Nuclear Spin ◽  
The State ◽  
Coupling Constant

Abstract In evaluating the hfs coupling constant A from levelcrossing signals in excited J = 1 states with 7=1/2 where the hfs splitting is smaller than the radiation width, an independent determi­ nation of the lifetime of the state under study is essential. This is demonstrated in the 6s7p 1Pi-state of171 Yb(7 = 1/2). The results are: r(7p *Pi) = 8.9(3) nsec and |^(7p !Pi) | =9(2) MHz.

The neutral weak current in muonic atoms

1985 ◽  
Vol 118 (4) ◽  
pp. 179-238 ◽  
Author(s):  
John Missimer ◽  
Leopold M. Simons
Keyword(s):  
Weak Current ◽  
Muonic Atoms ◽  
Neutral Weak Current
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