Total cross section exceeds transport cross section for quantum scattering from hard bodies at low and high wave numbers

2007 ◽  
Vol 48 (1) ◽  
pp. 013501 ◽  
Author(s):  
W. De Roeck ◽  
E. L. Lakshtanov
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Quantum Scattering ◽  
High Wave ◽  
Transport Cross Section ◽  
Wave Numbers

Measurements of the total cross section differenceΔσ Т innp transmission between 0.86 and 0.94 GeV

1994 ◽  
Vol 61 (1) ◽  
pp. 53-57 ◽  
Author(s):  
J. Ball ◽  
L. S. Barabash ◽  
R. Binz ◽  
J. Bystricky ◽  
Ph. Chesny ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Cross Section

scholarly journals A Hybrid Smoothed Finite Element Method for Predicting the Sound Field in the Enclosure with High Wave Numbers

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Haitao Wang ◽  
Xiangyang Zeng ◽  
Ye Lei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Sound Field ◽  
Numerical Dispersion ◽  
Computational Accuracy ◽  
Dispersion Error ◽  
High Wave ◽  
Wave Numbers ◽  
Smoothed Finite Element Method ◽  
Element Method

Wave-based methods for acoustic simulations within enclosures suffer the numerical dispersion and then usually have evident dispersion error for problems with high wave numbers. To improve the upper limit of calculating frequency for 3D problems, a hybrid smoothed finite element method (hybrid SFEM) is proposed in this paper. This method employs the smoothing technique to realize the reduction of the numerical dispersion. By constructing a type of mixed smoothing domain, the traditional node-based and face-based smoothing techniques are mixed in the hybrid SFEM to give a more accurate stiffness matrix, which is widely believed to be the ultimate cause for the numerical dispersion error. The numerical examples demonstrate that the hybrid SFEM has better accuracy than the standard FEM and traditional smoothed FEMs under the condition of the same basic elements. Moreover, the hybrid SFEM also has good performance on the computational efficiency. A convergence experiment shows that it costs less time than other comparison methods to achieve the same computational accuracy.

The Neutron Total Cross Section of Americium-243

1974 ◽  
Vol 55 (3) ◽  
pp. 273-279 ◽  
Author(s):  
O. D. Simpson ◽  
F. B. Simpson ◽  
J. A. Harvey ◽  
G. G. Slaughter ◽  
R. W. Benjamin ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Neutron Total Cross Section
Sign in / Sign up

Export Citation Format

Share Document