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6 Me V fo r th e C C system a s wel l a s elasti c scatterin g fo r 1 3 20

8 C + Fb at 390 MeV. Optical model analysis is reported and nuclear surface

transparenc y effect s ar e discussed togethe r wit h energ y dependenc e o f th e nuclea r 1 2 potential DWE A analysi s o f dat a o n th e 2 4. 4 Me V stat e o f C i s reported trend s o n th e energ y dependenc e o f mea n fiel d excitation s ar e deduced 2 A.

INTRODUCTION

Th e knowledg e o f th e nucleus-nucleu s A A interactio n i s a n ope n proble m i n curren t heavy-io n physics Th e essentia l o f thi s knowledg e i s draw n fro m elasti c scatterin g data A t lo w inciden t energ y (E/ A 2 0 MeV) th e stron g absorptio n effect s dominat e th e interactio n an d d o no t allo w a sensitiv e probin g o f th e nuclea r volume Th e angula r distribution s exhibi t typicaquotesdbs_dbs22.pdfusesText_28