Variation of the S Character and of the Average Excitation Energy in the NMR 13C–H Coupling Constants

1967 ◽  
Vol 47 (8) ◽  
pp. 3082-3083 ◽  
Author(s):  
N. Cyr ◽  
T. J. R. Cyr
Keyword(s):  
Excitation Energy ◽  
Coupling Constants ◽  
Average Excitation Energy

The stopping powers of atoms and molecules

1965 ◽  
Vol 285 (1402) ◽  
pp. 457-459 ◽  
Keyword(s):  
Excitation Energy ◽  
Charged Particles ◽  
Atoms And Molecules ◽  
Slowing Down ◽  
Average Excitation Energy

A procedure is described for calculating the average excitation energy of an atom or molecule appropriate to the slowing down of a beam of charged particles in a gas. The procedure is applied to helium with the result that its average excitation energy is 42∙0 eV.

Determining average excitation energy

1990 ◽  
Vol 242 (3-4) ◽  
pp. 309-312 ◽  
Author(s):  
William A. Friedman
Keyword(s):  
Excitation Energy ◽  
Average Excitation Energy

Zur theoretischen Interpretation der Anisotropie der 13C-NMR-chemischen Verschiebungen des Ethylens und Benzens auf halbempirischer Grundlage

1981 ◽  
Vol 36 (7) ◽  
pp. 763-767
Author(s):  
R. Radeglia
Keyword(s):  
Excitation Energy ◽  
Molecular Orbital ◽  
13C Nmr ◽  
Energy Method ◽  
Chemical Shifts ◽  
Average Energy ◽  
Localized Orbitals ◽  
Theoretical Interpretation ◽  
Molecular Plane ◽  
Average Excitation Energy

Abstract u r th e o re tis c h e n I n te r p r e ta t io n d e r A n is o tr o p ie d e r 13C -N M R -c h e m is d ie n V e rs c h ie b u n g e n des E th y le n s u n d B en zen s a u f h a lb e m p iris c h e r G r u n d la g e On the Semiempirical Theoretical Interpretation of the Anisotropy of 13C n.m.r. Chemical Shifts of Ethylene and Benzene The paramagnetic contribution of the 13C screening constants and their anisotropics are cal­ culated by using localized orbitals and the CNDO/2 method in the molecular orbital description. A comparison of the average energy method for calculating of shielding tensors with the sum-over-states method is performed. It is concluded that the average excitation energy is higher for the screening perpendicular to the molecular plane.

STUDY OF ANGULAR DISTRIBUTION OF HELIUM PROJECTILE FRAGMENTS IN INTERACTIONS OF 200 A GeV 32S IONS WITH EMULSION NUCLEI

1993 ◽  
Vol 08 (01) ◽  
pp. 21-31 ◽  
Author(s):  
◽  
M.I. ADAMOVICH ◽  
M.M. AGGARWAL ◽  
Y.A. ALEXANDROV ◽  
N.P. ANDREEVA ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Excitation Energy ◽  
High Precision ◽  
Minimum Bias ◽  
Single Source ◽  
Momentum Spread ◽  
Break Up ◽  
Average Excitation Energy ◽  
Bulk Part ◽  
Helium Emission

This paper presents data on the emission of helium fragments due to break up of 200 A GeV 32S ions in collision with emulsion nuclei. A total of 499 minimum bias events have been studied in an emulsion stack and 97 events in emulsion chambers. Emission angles of He fragments have been measured with high precision. This data has been compared with data of breakup of heavier as well as lighter projectiles and we observe that the value of the momentum spread, σ(p), increases with increasing projectile mass. The bulk part of the helium emission is consistent with a single source for helium fragments with an average excitation energy of (9.1±0.9) MeV. A tail of a few (<1%) He fragments with higher momenta is observed.

Vibrational and thermal averaging of the indirect nuclear spin-spin coupling constants of CH4, SiH4, GeH4 and SnH4

1997 ◽  
Vol 91 (5) ◽  
pp. 897-907 ◽  
Author(s):  
SHEELA KIRPEKAR ◽  
THOMAS ENEVOLDSEN ◽  
JENS ODDERSHEDE ◽  
WILLIAM RAYNES
Keyword(s):  
Nuclear Spin ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling

$\mathit{Ab\!-\!initio}$ Determination of Magnetic Interface Coupling Constants for Magnetic Multilayers

1997 ◽  
Vol 7 (11) ◽  
pp. 1299-1304 ◽  
Author(s):  
P. Weinberger ◽  
C. Sommers ◽  
U. Pustogowa ◽  
L. Szunyogh ◽  
B. Újfalussy
Keyword(s):  
Ab Initio ◽  
Magnetic Multilayers ◽  
Coupling Constants ◽  
Interface Coupling
Sign in / Sign up

Export Citation Format

Share Document