Supported by the National Science Foundation and Indiana Universit

Anderson, B.

Baldwin, A.

Berman, B.

Bertozzi, W.

Buti, T.

Fazely, A.

Foster, C.C.

Hersman, W.

Hyde, C.

Hynes, M.

Kelly, J.

Madey, R.

Moniz, E.

Nixon, G.

Norum, B.

Pugh, W.

Rad, F.

Tandy, P.C.

Walker, G.

Watson, J.

English

IUScholarWorks

THE (p ,n) REACTION AT INTERMEDIATE ENERGIES WITH THE ISOTOPES OF OXYGEN (160, 70 ,  *0) AND 9 ~ e  
AS PART OF A UNIFIED APPROACH TO THE STUDY OF THESE NUCLEI 
R. Madev, B. Anderson, A. Baldwin, A. Fazely, G. Watson, and P.C. Tandy 
Kent State University, Kent, Ohio 44242 
W, Bertozzi ,  T. Buti ,  W. Hersman, C. Hyde, M. Hynes, J. Kelly,  E. Moniz, B. Norum, G. Nixon, W. Pugh, and F. Rad 
Massachusetts Ins t i tu te  of Techno logy, Cambridge, Massachusetts 02 139 
B. Berman 
Lawrence Livermore Laboratory, Livermore, California 95616 
C.C.  Fos ter  and G.  Walker 
Indiana University CycZotron Faci Z i t  y, BZoomington, Indiana 4 7405 
Preliminary work on t h i s  p r o j e c t  was described energy r e so lu t ion  of 230 keV f o r  80 MeV neutrons from 
l a s t  year.  During the  pas t  year a second de t ec to r  t h e  2 ~ ( p , n )  2~ r eac t ion .  This r e so lu t ion  is b e t t e r  
s t a t i o n  was commissioned f o r  t he  beam swinger f a c i l i t y ,  than an t i c ipa t ed  when t h i s  p ro j ec t  was approved; we 
which can be used f o r  measurements a t  labora tory  angles need t o  be a b l e  t o  c l e a r l y  s epa ra t e  t he  ground and 
between 24' and 48'. With a f l i g h t  of 76 m, we achieved f i r s t - exc i t ed  s t a t e s  of 1 7 ~  which a r e  500 keV apa r t .  
an energy r e so lu t ion  of about 350 keV f o r  80 MeV Further work awaits  t h e  cons t ruc t ion  of a t h i r d  de- 
neutrons from t h e  160(p,n) 1 6 ~  r eac t ion  a t  99 MeV wi th  t e c t o r  s t a t i o n  f o r  measurements a t  labora tory  angles 
t h e  49 mg/cm2 9 ~ e 1 6 0  t a r g e t  cont r ibut ing  about 310 keV. between 48' and 72' i n  order  t o  achieve t h e  momentum 
With a th inner  23 mg/cm2 12c t a r g e t ,  we achieved an t r a n s f e r  up t o  3 fm-I needed f o r  t h i s  p r o j e c t  . 
THE 27~1,  4 0 ~ a  AND 4 8 ~ a ( p , n )  REACTIONS AT 160 MeV 
M. Ahmad, B.D. Anderson, A.R. Baldwin, A. Fazely, J. Knudson, R. Madey, J . W .  Watson, and P.C. Tandy 
Kent State  University, Kent, Ohio 44242 
C.C. Fos ter  
Indiana University CycZotron FaciZit y, BZoomington, Indiana 4 7405 
We obtained some da t a  i n  October 1979 on coherent and information on the  r e l a t i v e  amounts of coherent 
and incoherent neutron production i n  t he  160 MeV (p,n) and incoherent  neutron production i n  t he  region of 
reac t ion  on nuc l e i  with one excess neutron ( 2 7 ~ 1 ) ,  the  g i an t  resonances. 
many excess neutrons ( 4 8 ~ a ) ,  and no excess neutrons The neutron spec t r a  from intermediate-energy 
( 4 0 ~ a ) .  For a coherent process,  t h e  s c a t t e r i n g  am- (p,n) r eac t ions  on nuc l e i  w i th  excess neutrons can 
p l i t udes  from d i f f e r e n t  nucleons a r e  summed; whereas be regarded t o  cons i s t  of t h e  ground s t a t e  (and o ther  
f o r  an incoherent  process,  t he  squares of t h e  ampli- low-lying ind iv idua l  nuclear  s t a t e s ) ,  and giant-  
tudes a r e  summed. Neutron production w i l l  be s tudied  resonance and continuum regions.  The e x c i t a t i o n  of 
i n  order t o  look f o r  a predic ted  suppression a t  for-  t he  g i an t  resonance is  always a coherent  process and 
ward angles (within an angular region of t he  order the  e x c i t a t i o n  of the  continuum is always an inco- 
of X/R) i n  t he  cross  s ec t ion  f o r  an incoherent  process,  herent  process.  The ground-state t r a n s i t i o n  is  an 
an expected suppression (outs ide  of t h i s  angular  incoherent  process f o r  a t a r g e t  wi th  one excess neu- 
region) i n  the  cross  s ec t ion  f o r  a coherent process,  t r on  and a coherent process f o r  a t a r g e t  with many 


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/2022/2862/1/iucf_1979_33.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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