This work was supported by National Science Foundation Grant PHY 76-84033 and Indiana Universit

Anderson, B.

Baldwin, A.

Berman, B.

Bertozzi, W.

Deady, M.

Foster, C.

Hersman, W.

Hynes, M.

Knudson, J.

Madey, R.

Miska, H.

Moniz, E.

Nixon, G.

Norum, B.

Rad, F.

Walker, G.

Witten, T.

English

IUScholarWorks

THE (p,n) REACTION AT INTERMEDIATE ENERGIES WITH THE ISOTOPES OF OXYGEN 
(160, 170, 180) and 9Be AS PART OF A UNIFIED APPROACH TO THE STUDY OF THESE 
NUCLEI 
R. ~ a d e ~ , *  B. ~ n d e r s o n , "  A. ~ a l d w i n , *  J. budson ,*  T. wi t ten ,*  W. ~ e r t o z z i , * *  M. ~ e a d ~ , * *  
W. Hersman,** M. Hynes,** E. Moniz ** A. ~ i s k a , * *  B. ~orum,** 
G. ~ i x o n , * *  F.   ad, ** B . Berman,**' C. Fos ter  and G. Walker 
Combining (p,n) , ( p , p l ) ,  and ( e , e l )  e l a s t i c  
and i n e l a s t i c  s c a t t e r i n g  d a t a  from 170 and 180 
should a i d  i n  resolv ing  unce r t a in t i e s  associa ted  
wi th  t he  nuclear  s t r u c t u r e  of these  systems. The 
reason is t h a t  t he  nucleon-nucleus and the  e l ec t ron -  
nucleus i n t e r a c t i o n s  a r e  b a s i c a l l y  d i f f e r e n t ;  there-  
f o r e  each r eac t ion  would test proposed models i n  a 
d i f f e r e n t  way. 
During a two-shif t  prel iminary run a t  119.8 MeV 
i n  October 19 77, we obtained some pre l iminary  time- 
of f l i g h t  s p e c t r a  of neutrons a t  angles of  lo, 7O, 
lgO, and 24'. I n  Fig. 1, we d i sp l ay  the  e x c i t a t i o n  
energy s p e c t r a  i n  1 6 ~ .  The s t a t e  a t  about 6 MeV 
of e x c i t a t i o n  energy, which is dominant a t  240, is 
be l ieved t o  be  a high-spin (4') s t a t e  predic ted  by 
Moffa and Walker. 1 
I 11.3,8 MEV 
The Be0 t a r g e t s  had the  i s o t o p i c  compositions 
l i s t e d  below i n  t he  f i r s t  t h r ee  rows: 
Atomic Percent  of Oxygen Isotopes 
160 
- - 170 7 180 
2 1j i 5 i C' 5 1: 
EXC I i R T  I CN 5NEPGY. EX( MEY 1 Targets  w i th  i s o t o p i c  compositions approximating 
those l i s t e d  i n  t he  f o u r t h  and f i f t h  rows above Figure 1. 
w i l l  be used when t h i s  experiment is  ca r r i ed  ou t .  
With t he  beam swinger f a c i l i t y ,  we w i l l  be 
ab l e  t o  look a t  angles out  t o  700 corresponding 
t o  momentum t r a n s f e r s  up t o  3 inverse  fermis f o r  
140 MeV inc iden t  protons.  We plan  a l s o  t o  improve 
the  energy r e so lu t ion  by increas ing  the  f l i g h t  
pa th  from the  29 meters used i n  the  explora tory  
run t o  50 meters i n  t he  angular  range from 0 t o  
24O. 
* ~ e n t  S t a t e  Universi ty 
**~assachuse  t ts I n s t i t u t e  of Technology 
***~awrence Livermore Laboratory 


The (p,n) Reaction at Intermediate Energies With the Isotopes of Oxygen (16-O, 17-O, 18-O) and 9-Be as Part of a Unified Approach to the Study of These Nuclei

https://scholarworks.iu.edu/dspace/bitstream/2022/3000/1/iucf_1977_112-113.pdf

The (p,n) Reaction at Intermediate Energies With the Isotopes of Oxygen (16-O, 17-O, 18-O) and 9-Be as Part of a Unified Approach to the Study of These Nuclei

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