Nuclear Spin Symmetry Conservation Studied for Symmetric Top Molecules (CH3D, CHD3, CH3F, and CH3Cl) in Supersonic Jet Expansions

2019 ◽  
Vol 123 (29) ◽  
pp. 6160-6174 ◽  
Author(s):  
Veronika Horká-Zelenková ◽  
Georg Seyfang ◽  
Peter Dietiker ◽  
Martin Quack
Keyword(s):  
Nuclear Spin ◽  
Supersonic Jet ◽  
Spin Symmetry ◽  
Symmetric Top Molecules

On the Role of Nuclear Spin Symmetry of Symmetric Top Molecules in Gas Phase Nuclear Magnetic Relaxation

1974 ◽  
Vol 52 (5) ◽  
pp. 387-395 ◽  
Author(s):  
B. C. Sanctuary
Keyword(s):  
Nuclear Spin ◽  
Magnetic Relaxation ◽  
Spin Symmetry ◽  
Nuclear Magnetic Relaxation ◽  
The Difference ◽  
Symmetric Top Molecules ◽  
Spin Species ◽  
Zero Frequency ◽  
Nuclear Magnetic

For symmetric top molecules the role of nuclear spin symmetry is included in the derivation of the nuclear magnetic relaxation rate. It is assumed that this is dominated by a spin-rotation mechanism. Of the three nuclear spin species which exist for ZX3Y' symmetric tops, it is found that the "zero frequency" K = −1 to +1 term results in two of the species relaxing with a different rate from the third. The difference, which allows a direct NMR evaluation of the relative values of [Formula: see text] and [Formula: see text], is enhanced at low temperatures.

scholarly journals Nuclear Spin Symmetry Conservation in 1H216O Investigated by Direct Absorption FTIR Spectroscopy of Water Vapor Cooled Down in Supersonic Expansion

2017 ◽  
Vol 121 (40) ◽  
pp. 7455-7468 ◽  
Author(s):  
Robert Georges ◽  
Xavier Michaut ◽  
Audrey Moudens ◽  
Manuel Goubet ◽  
Olivier Pirali ◽  
...  
Keyword(s):  
Water Vapor ◽  
Ftir Spectroscopy ◽  
Nuclear Spin ◽  
Spin Symmetry ◽  
Direct Absorption ◽  
Supersonic Expansion

Violation of nuclear-spin symmetry in collisions of symmetric tops

1998 ◽  
Vol 294 (4-5) ◽  
pp. 387-390 ◽  
Author(s):  
B Nagels ◽  
P Bakker ◽  
L.J.F Hermans ◽  
P.L Chapovsky
Keyword(s):  
Nuclear Spin ◽  
Spin Symmetry

Nuclear-Spin-Symmetry Conversion of Tunneling Methyl Groups

1973 ◽  
Vol 31 (23) ◽  
pp. 1375-1377 ◽  
Author(s):  
S. Clough ◽  
W. S. Hinshaw ◽  
T. Hobson
Keyword(s):  
Nuclear Spin ◽  
Spin Symmetry ◽  
Methyl Groups
Sign in / Sign up

Export Citation Format

Share Document