Polarization in neutron-proton scattering at 29.6 MeV

Eldred, Robert A.; Bonner, B. E.; Cahill, T. A.

doi:10.1103/physrevc.12.1717

Phys. Rev. C

1975

DOI: 10.1103/physrevc.12.1717

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Polarization in neutron-proton scattering at 29.6 MeV

Robert A. Eldred

B. E. Bonner

T. A. Cahill

Abstract: The polarization in neutron-proton scattering at 29.6 MeV was deduced from asymmetries measured at every 10' c.m. from 50 to 150' c.m. The incident neutron beam was derived from a high-pressure deuterium gas cell via the 'H(d, n)'He reaction at 37' c.m. The beam passed through a spin rotation magnet and, at the target location 5.4 rn from the gas cell, possessed a flux of 5 )& 10' n/sec and a polarization of 0.32~0.04. Data between 50 and 110' c.m. were obtained using scintillating CH target in coincidence wit… Show more

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Cited by 8 publications

References 11 publications

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Nuclear Data Sheets for A = 141

Nica

2014

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A b s t r a c t : N u c l e a r s p e c t r o s c o p i c i n f o r m a t i o n f o r e x p e r i m e n t a l l y i n v e s t i g a t e d n u c l i d e s o f m a s s 1 4 1 ( T e , I , X e , C s , Ba, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, and Ho) has been evaluated. A summary of information obtained in various reaction and decay experiments is presented, together with data tables and adopted level schemes. Cutoff Date: Literature available up to Jan 1, 2012 has been consulted. General Policies and Organization of Material: see http://www.nndc.bnl.gov/nds/NDSPolicies.pdf. G e n e r a l C o m m e n t s : T h e s t a t i s t i c a l a n a l y s i s o f γ -r a y d a t a a n d d e d u c e d l e v e l s c h e m e s i s c a r r i e d o u t t h r o u g h computer codes available at NNDC, BNL website: www.nndc.bnl.gov. The direct feedings to excited states in β -a n d ε d e c a y s h a v e g e n e r a l l y b e e n c o m p u t e d f r o m I ( γ + c e ) i n t e n s i t y b a l a n c e s a t e a c h l e v e l ; t h e a s s o c i a t e d l o g f t v a l u e s a r e c a l c u l a t e d u s i n g l o g f t c o d e . A l l Q v a l u e s h a v e b e e n a d o p t e d f r o m 2 0 1 2 W a 3 8 . T h e o r e t i c a l c o n v e r s i o n c o e f f i c i e n t s a r e f r o m B r I c c c o d e : v 2 . 2 b ( 2 0 -J a n -2 0 0 9 ) ( 2 0 0 8 K i 0 7 ) w i t h " F r o z e n O r b i t a l s " approximation, and with implicit uncertainty of 1.4%. Acknowledgments: The author is grateful to B. Singh and collaborators (McMaster University), and to F. Kondev ( A N L ) , w h o p r e p a r e d t h e X U N D L f i l e s u s e d i n t h i s e v a l u a t i o n , a s w e l l a s t o B . P r i t y c h e n k o ( B N L ) a n d collaborators for their NSR reference database work which made possible this evaluation. I also thank for the d e t a i l e d r e v i e w e r ' s w o r k o f t h e m a n u s c r i p t o f t h i s e v a l u a t i o n , a s w e l l a s L i b b y M c C u t c h a n ( B N L ) f o r u s e f u l a d d i t i o n a l r e v i e w c o m m e n t s , M a r i o n B l e n n a u ( B N L ) f o r t h e c o r r e c t i o n a n d t e c h n i c a l e d i t o r i a l w o r k , a n d J . K . T u l i f o r t h e o v e r a l l c o o r d i n a t i o n o f t h e e d i t o r i a l p r o c e s s . I a l s o t h a n k A . S o n z o g n i ( B N L ) f o r t h e coordination of my contract as well as M. Herman, Head of the NNDC (BNL) for giving me the opportunity of this work. Finally I pay tribute to the memory of T.W. Burrows, my mentor evaluator.

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Nuclear Data Sheets for A = 141

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2014

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Nuclear Data Sheets for A=141

Nica

2023

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Neutron-proton analyzing power at 50 MeV

et al. 1980

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The analyzing power in neutron-proton elastic scattering has been measured at 50 MeV. A neutron beam with a polarization of 0.476+0.017, found by an absolute method, was used to determine the analyzing power at seven angles in the range 60' to 120' center of mass by detecting scattered neutrons. These measurements are complementary to a previous set made at this laboratory in which only recoil protons were observed. The two sets of data agree well in the overlap region and are compared with the only other data measured much earlier by a different method. Absolute statistical errors in the analyzing powers range from +0.019 to +0.023 in addition to a scale uncertainty' of about 4% arising from the beam polarization.The results are compared with a phase shift analysis of Signell.NUCLEAR REACTIONS H(n, n)P, E= 50.0 Mev; measured A~(8) for 60.6 «8 I «120.6, about every 10 O.m.

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Polarization in neutron-proton scattering at 29.6 MeV

Cited by 8 publications

References 11 publications

Nuclear Data Sheets for A = 141

Nuclear Data Sheets for A = 141

Nuclear Data Sheets for A=141

Neutron-proton analyzing power at 50 MeV

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