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Submitted on 1 Jan 1987
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ORDER, CHAOS AND NUCLEAR DYNAMICS
W. Swiatecki
To cite this version:
W. Swiatecki. ORDER, CHAOS AND NUCLEAR DYNAMICS. Journal de Physique Colloques, 1987,
48 (C2), pp.C2-247-C2-247. �10.1051/jphyscol:1987235�. �jpa-00226502�
JOURNAL DE PHYSIQUE
Colloque C2, supplbment au n o 6, Tome 48, juin 1987
ORDER, CHAOS AND NUCLEAR DYNAMICS
W. J. SWIATECKI
Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, C A 94720, U.S.A.
A b s t r a c t
The purpose o f t h e t a l k was t o p o i n t o u t t h e r e l a t i o n between r e c e n t developments i n n u c l e a r dynamics and t h e o r i e s d e a l i n g w i t h t h e t r a n s i t i o n f r o m o r d e r t o chaos i n general. The l e a d i n g i d e a can be s t a t e d v e r y simply:
a) when t h e nucleonic motions i n t h e mean n u c l e a r f i e l d are ordered, then t h e nucleus as a whole i s expected t o behave l i k e an e l a s t i c s o l i d , b) when t h e nucleonic motions a r e c h a o t i c , t h e nucleus should behave l i k e a v e r y viscous f l u i d , dominated by t h e so-called one-body d i s s i p a t i o n , c ) when t h e nucleonic motions a r e intermediate, t h e nucleus should e x h i b i t t h e p r o p e r t i e s o f a v i s c o - e l a s t i c m a t e r i a l . Thus, i n o r d e r t o understand t h e dynamical e v o l u t i o n s o f n u c l e a r systems, such as t a k e p l a c e i n n u c l e a r f i s s i o n o r nucleus-nucleus c o l l i s i o n s , i t i s a b s o l u t e l y necessary t o understand t h e degree o f o r d e r i n nucleonic motions and how t h i s o r d e r may g i v e p l a c e t o chaos as t h e shape (and temperature) o f a n u c l e a r system changes i n time.
Examples i l l u s t r a t i n g these ideas were discussed, i n c l u d i n g g i a n t quadrupole resonances, n u c l e a r f i s s i o n , t h e dynamical hindrance t o compound nucleus f o r m a t i o n and t h e c e n t r i f u g a l s o l i d i f i c a t i o n o f t h e l 5 * l I y
superdef ormed nucleus.
Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:1987235
