This research was sponsored by the National Science Foundation Grant NSF PHY 87-1440

Alarcon, R.

Gaarde, C.

Goodman, C.D.

Horen, D.J.

Rapaport, J.

Sugarbaker, E.

Taddeucci, T.N.

Wang, D.

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GAMOW-TELLER STRENGTH OBTAINED I N  THE 2,  5 4 ~ r ( p , n )  5 2  * 54Mn REACTIONS 
D . J .  Horen 
Oak Ridge Na t i ona l  Lab, Oak Ridge, Tennessee 37830 
J. Rapapor t ,  D. Wang, R. Alarcon 
Ohio Un ive r s i t y ,  Athens,  Ohio 45701 
C.D. Goodman 
I n d i a n a  U n i v e r s i t y  Cyclo t ron  F a c i l i t y ,  Bloomington, I nd i ana  47405 
E . Sugarbaker  
Ohio S t a t e  Un ive r s i t y ,  Columbus, Ohio 43212 
C. Gaarde 
N i e l s  Bohr I n s t i t u t ,  2100 Copenhagen, Denmark 
T .N. Taddeucci  
Ohio U n i v e r s i t y  and Ind i ana  U n i v e r s i t y  Cyc lo t ron  F a c i l i t y  
The 5 2 * 5 4 ~ r ( p , n ) 5 2  354Mn r e a c t i o n s  have been r e a c t i o n  does  n o t  t r a n s f e r  i s o s p i n .  Thus on ly  T=1 
s t u d i e d  a t  120 M e V  u s i n g  t h e  IUCF beam swinger s t a t e s  i n  52Mn a r e  e x c i t e d  i n  t h i s  r e a c t i o n .  The 
f a c i l i t y .  Measurements were made over  an  angu l a r  range  r epo r t ed1  1+ s t a t e s  below 4.8 MeV e x c i t a t i o n  energy  i n  
from ze ro  t o  e l even  deg ree s ,  u s ing  l a r g e  volume neu t ron  52Mn a r e  a t  0.55, 2.63, 3.57 and 4.38 MeV. A l l  t h e s e  
d e t e c t o r s  w i th  sub-nanosecond t ime r e s o l u t i o n ,  l o c a t e d  s t a t e s  a r e  e x c i t e d  i n  t h e  (p ,n)  r e a c t i o n  w i th  s i m i l a r  
a t  a  f l i g h t  pa th  of  130 meters.  An o v e r a l l  energy  r e l a t i v e  s t r e n g t h s .  The s t r o n g e s t  1+ s t r e n g t h  
r e s o l u t i o n  of l e s s  than  300 keV was ob t a ined .  T a r g e t s  co r r e sponds  t o  t h e  2.67 MeV t r a n s i t i o n .  
o f  7 ~ i  and 1 2 c  were used t o  o b t a i n  an  energy and A p r e l i m i n a r y  v a l u e  f o r  t h e  t o t a l  GT s t r e n g t h  
e f f i c i e n c y  c a l i b r a t i o n  of t h e  neu t ron  d e t e c t o r s .  observed  up t o  1 5  MeV e x c i t a t i o n  energy  i s  5.5 + 1.5. 
Angular  d i s t r i b u t i o n s  f o r  d i s c r e t e  s t a t e s  below Assuming a  v a l u e  S(P+) = 6 (ob t a ined  from s y s t e m a t i c s  
5.0 MeV e x c i t a t i o n  energy and c h a r a c t e r i z e d  by an  L=O i n  t h e  N=28 i s o t o n e s ) ,  t h e  observed  s t r e n g t h  is  on ly  
a n g u l a r  momentum t r a n s f e r  a r e  f i t t e d  w i th  DWIA about  30% of t h e  e s t i m a t e d  va lue  S(p') = 18. A s i m i l a r  
c a l c u l a t i o n s  i nvo lv ing  l f 7 / 2  p a r t i c l e - h o l e  t r a n s i t i o n s ,  quenching has been e s t i m a t e d  i n  t h e  M 1  s t r e n g t h  
b u t  n o t  wi th  l f7 /2+1fg/2  p a r t i c l e - h o l e  t r a n s i t i o n s .  r e p o r t e d  i n  ( e , e l )  and (p ,p '  )  measurement^.^ 
S e v e r a l  two-pa r t i c l e  s t r i p p i n g  and pick-up Ana ly s i s  of t h e  5 4 ~ r  d a t a  i s  i n  p rog re s s .  
r e a c t i o n s  a r e  r e p o r t e d L  t o  e x c i t e d  s t a t e s  i n  52Mn. I n  
1 )  Data S h e e t s  f o r  A=52, J.R. Beene, Nucl. Data S h e e t s  
p a r t i c u l a r  t h e  5 4 ~ e ( d ,  a )  52Mn r e a c t i o n  is  i n t e r e s t i n g .  - 22 (1978) 235. 
The nuc l eus  5 4 ~ e  has  i s o s p i n  equa l  t o  one and t h e  ( d , a )  2) J. Kapaport  e t  a l . ,  Nucl. Phys. A427 (1984) 332. 


Gamow Teller Strength Obtained in the 52,54-Cr(p,n)52,54-Mn Reactions

https://scholarworks.iu.edu/dspace/bitstream/2022/1009/1/iucf_1984_26.pdf

Gamow Teller Strength Obtained in the 52,54-Cr(p,n)52,54-Mn Reactions

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