CHARACTERIZATION OF THE MODERATED NEUTRON FIELD AROUND AN ISOTOPIC Am-241/Be NEUTRON SOURCE
CHARACTERIZATION OF THE MODERATED NEUTRON FIELD AROUND AN ISOTOPIC Am-241/Be NEUTRON SOURCE
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Date
1992-11
Authors
MUSTAPHA, Amidu Olalekan
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Abstract
The s p a t i a l v a r i a t i o n of the neutron f i e l d in the
c y l i n d r i c a l c a v i t y above a 5 - c u r i e Am-241/Be source,
i n s t a l l e d in a p a r a f f i n wax ' h o w i t z e r ' has been
c h a r a c t e r i s e d using the neutron a c t i v a t i o n a n a l y t i c al
method. The neutron flux monitors used are aluminium
and i n d i um f o i l s . A t h i r d o r d e r p o l y n o m i a l was
o b t a i n e d from a f i t of t h e a x i a l n e u t r o n flux
d i s t r i b u t i o n c u r v e , and t h e a p p l i c a t i o n of t h is
p o l y n o m i a l , in e s t i m a t i n g t h e a v e r a g e n e u t r o n flux
w i t h i n a bulk sample t h a t is being i r r a d i a t e d , was
d i s c u s s e d . For the sake of comparison, a t h e o r e t i c al
e s t i m a t i o n of the neutron flux d i s t r i b u t i o n was a l so
c a r r i e d out, using the elementary d i f f u s i o n e q u a t i o n.
F i n a l l y , the work discussed the unique a p p l i c a t i o n of
i s o t o p i c neutron sources in q u a l i t y c o n t r o l , using the
f a s t neutron t h e r m a l i s a t i o n method
Description
A t h e s i s s u b m i t t e d to t h e P o s t g r a d u a t e S c h o o l , Ahmadu
B e l l o U n i v e r s i t y , i n p a r t i a l f u l f i l m e n t o f t he
r e q u i r e m e n t f o r t h e d e g r e e o f M a s t e r of S c i e n ce
( P h y s i c s )
Department of Physics
Faculty of Science
Ahmadu Bello University, Zaria
November, 1992
Keywords
CHARACTERIZATION,, MODERATED,, NEUTRON,, FIELD, ISOTOPIC,, NEUTRON SOURCE