Anomalous Absorption of Deuteron Partial Waves by Nuclear Optical Potential
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Date
2006
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Kelaniya
Abstract
M.Kawai and Y. Iseri (2), (3) found an interesting phenomenon in nuclear physics,
motivated by the work of (1), in case of nucleon-nucleus elastic scattering. In the
following this phenomenon is discussed in case of neutron (n)-nucleus (A) elastic
scattering.
In elastic scattering of neutron on (A), the elastic S – matrix element for a particular
combination of j l E A cm , , , becomes very small (almost zero), and they called this
phenomenon anomalous absorption of neutron partial waves by nuclear optical potential,
where j is the total angular momentum, l is the angular momentum, cm E the centre of
mass energy and A the mass of the nucleus. The striking feature of this phenomenon is
systematic in various parameter ( f ,l, E , A) cm planes. Among them, systematic in
⎟⎠
⎞
⎜⎝
⎛ 3
1 , A
k
l plane is actually remarkable, which consists of straight lines. All straight lines
correspond to a definite node of wave functions associated with A k E l j cm , , , .
It is quite interesting to examine whether this phenomenon occurs in case of composite
projectiles such as d , He , etc.
Now, it has been shown (4) that this phenomenon is universal. The main purpose of this
paper is to report results of the case d − A after being rescrutinized by us. It is striking
that the systematic in ⎟
⎟
⎠
⎞
⎜ ⎜
⎝
⎛ + + +
3
1
2
,
( 1)
A
k
η η l l
plane is remarkably clearer than the
case of neutron. Here,
k
η + η 2 + l (l +1)
, the closest approach is physically meaningful
in case of the presence of the Coulomb potential.
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Citation
Piyadasa, R.A.D., Kawai, M. and Munasinghe, J., 2006. Anomalous Absorption of Deuteron Partial Waves by Nuclear Optical Potential, Proceedings of the Annual Research Symposium 2006, Faculty of Graduate Studies, University of Kelaniya, pp 78.