|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.48 [2010] >
IJPAP Vol.48(10) [October 2010] >
| Title: | Elastic scattering of 4He atoms at the surface of liquid helium |
| Authors: | K Torongey, P
M Khanna, K
K Ayodo, Y
T Sakwa, W
G Kanyeki, F
T Ekai, R
N Kimengichi, R
Rotich, S |
| Keywords: | Elastic scattering
4He atoms
t-matrix
Potential energy |
| Issue Date: | Oct-2010 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Elastic
scattering of 4He atoms when they approach the surface of 4He
liquid, has been studied. The liquid surface is assumed to be uniform and the
density profile is the same along and perpendicular to the surface. The
incident 4He atom will interact with a large number of 4He
atoms in the liquid near the surface of liquid 4He. Hence, the effective
interaction of the incident particle will be due to many-body forces. The
many-body forces are represented by the t-matrix. In the equation for potential
energy per atom in the bulk liquid, the pair potential was replaced by the
t-matrix. The Gaussian potential used in calculating the expectation value of
the t-matrix is equivalent to the Lennard-Jonnes potential. The results give
quantitative agreement with the corresponding experimental values for 4He
for the various values of c2. The potential energy per
atom in the bulk liquid obtained in this calculation is -20.130 K. The
experimental energy of interaction is -20.81K, which implies that the formula
derived by us for the potential energy per atom in the bulk liquid works well |
| Page(s): | 743-748 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.48(10) [October 2010]
|
|
