Vol.3, No 2, 2005 pp. 141 - 149
UDC 530.145; 539.1
ELASTIC SCATTERING OF LOW-ENERGY
POSITRON BY ATOM
M. R. Nikolić1, A. R.Tančić2
1Faculty of Science and Mathematics,
P.O. Box 224, 18001 Niš, Serbia and Montenegro
2Institute for Nuclear Sciences
Vinča,
P.O. Box 522, Belgrade, Serbia and Montenegro
Abstract. In this paper, we showed our calculation of the
elastic
scattering of the slow positron from atoms. The calculation are
performed
for He, Ne, Xe and Kr. In the calculations we used Random phase
approximation.
By slowing Dyson equation we take into account the correlations
effects.
Our results are in good agreement with experimental and other
theoretical
results.
Key words: positron-atom
elastic scattering, random phase approximation.
ELASTIČNO RASEJANNJE SPORIH
POZITRONA NA ATOMIMA
U radu smo prikazali naše proračune elastičnog rasejanja sporih
pozitrona
na atomima inertnih gasova (He, Ne, Xe, Kr). Za izračunavanje faznih
pomeraja
koristli smo aproksimaciju slučajnih faza a na osnovu faznih pomeraja
računali
smo efikasne preseke za rasejanje. Korelacione efekte smo uzimali u
obzir
rešavanjem Dysonove jednačine. Dobijeni rezultati se dobro slažu sa
eksperimentalnim
i drugim teorijskim rezultatima.
