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Title: Simultaneous measurements of ({ital {rvec p}},{ital {rvec p}}{prime}) and ({ital {rvec p}},{ital p}{prime}{gamma}) observables for the 15.11 MeV, 1{sup +}, {ital T}=1 state in {sup 12}C at 200 MeV

Abstract

We have made simultaneous measurements of singles ({ital {rvec p}},{ital {rvec p}}{prime}) spin-transfer observables and coincident ({ital {rvec p}},{ital p}{prime}{gamma}) yields and asymmetries for the 15.11 MeV, 1{sup +}, {ital T}=1 state in {sup 12}C, at an incident proton bombarding energy of 200 MeV. Data were taken at four proton scattering angles ranging from {theta}{sub {ital p}}{sup c.m.}=5.5{degree} to 16.5{degree}. Both vertical (normal to the reaction plane) and horizontal (in-plane) incident beam polarizations were used, which allowed us to extract 16 different observables for this transition. In particular, using the ({ital {rvec p}},{ital p}{prime}{gamma}) reaction, we measured the sideways and longitudinal analyzing powers, {ital D}{sub 0{ital S}} and {ital D}{sub 0{ital L}}, which vanish identically in the ({ital {rvec p}},{ital p}{prime}) reaction. Detailed comparisons of all observables to calculations done in both relativistic and nonrelativistic formalisms are presented. Surprisingly, a relativistic description in which knock-on exchange processes are not explicitly included provides the best overall agreement with the data.

Authors:
; ; ; ; ; ; ; ;  [1]; ; ; ; ; ; ;  [2];  [3];  [4]
  1. Indiana University Cyclotron Facility, Bloomington, Indiana 47408 (United States)
  2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  3. Centenary College of Louisiana, Shreveport, Louisiana 71134 (United States)
  4. Ohio University, Athens, Ohio 45701 (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory
OSTI Identifier:
122389
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Journal Article
Journal Name:
Physical Review, C
Additional Journal Information:
Journal Volume: 52; Journal Issue: 5; Other Information: PBD: Nov 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; PROTON REACTIONS; POLARIZATION-ASYMMETRY RATIO; ASYMMETRY; CARBON 12 TARGET; COINCIDENCE METHODS; KNOCK-ON REACTIONS; MEV RANGE 100-1000; PHOTONS; POLARIZED BEAMS; PROTONS

Citation Formats

Wells, S P, Wissink, S W, Bacher, A D, Berg, G P.A., Bowyer, S M, Chang, S, Franklin, W A, Liu, J, Stephenson, E J, Beene, J R, Bertrand, F E, Halbert, M L, Mueller, P E, Olive, D H, Stracener, D W, Varner, R L, Lisantti, J, and Hicks, K H. Simultaneous measurements of ({ital {rvec p}},{ital {rvec p}}{prime}) and ({ital {rvec p}},{ital p}{prime}{gamma}) observables for the 15.11 MeV, 1{sup +}, {ital T}=1 state in {sup 12}C at 200 MeV. United States: N. p., 1995. Web. doi:10.1103/PhysRevC.52.2559.
Wells, S P, Wissink, S W, Bacher, A D, Berg, G P.A., Bowyer, S M, Chang, S, Franklin, W A, Liu, J, Stephenson, E J, Beene, J R, Bertrand, F E, Halbert, M L, Mueller, P E, Olive, D H, Stracener, D W, Varner, R L, Lisantti, J, & Hicks, K H. Simultaneous measurements of ({ital {rvec p}},{ital {rvec p}}{prime}) and ({ital {rvec p}},{ital p}{prime}{gamma}) observables for the 15.11 MeV, 1{sup +}, {ital T}=1 state in {sup 12}C at 200 MeV. United States. doi:10.1103/PhysRevC.52.2559.
Wells, S P, Wissink, S W, Bacher, A D, Berg, G P.A., Bowyer, S M, Chang, S, Franklin, W A, Liu, J, Stephenson, E J, Beene, J R, Bertrand, F E, Halbert, M L, Mueller, P E, Olive, D H, Stracener, D W, Varner, R L, Lisantti, J, and Hicks, K H. Wed . "Simultaneous measurements of ({ital {rvec p}},{ital {rvec p}}{prime}) and ({ital {rvec p}},{ital p}{prime}{gamma}) observables for the 15.11 MeV, 1{sup +}, {ital T}=1 state in {sup 12}C at 200 MeV". United States. doi:10.1103/PhysRevC.52.2559.
@article{osti_122389,
title = {Simultaneous measurements of ({ital {rvec p}},{ital {rvec p}}{prime}) and ({ital {rvec p}},{ital p}{prime}{gamma}) observables for the 15.11 MeV, 1{sup +}, {ital T}=1 state in {sup 12}C at 200 MeV},
author = {Wells, S P and Wissink, S W and Bacher, A D and Berg, G P.A. and Bowyer, S M and Chang, S and Franklin, W A and Liu, J and Stephenson, E J and Beene, J R and Bertrand, F E and Halbert, M L and Mueller, P E and Olive, D H and Stracener, D W and Varner, R L and Lisantti, J and Hicks, K H},
abstractNote = {We have made simultaneous measurements of singles ({ital {rvec p}},{ital {rvec p}}{prime}) spin-transfer observables and coincident ({ital {rvec p}},{ital p}{prime}{gamma}) yields and asymmetries for the 15.11 MeV, 1{sup +}, {ital T}=1 state in {sup 12}C, at an incident proton bombarding energy of 200 MeV. Data were taken at four proton scattering angles ranging from {theta}{sub {ital p}}{sup c.m.}=5.5{degree} to 16.5{degree}. Both vertical (normal to the reaction plane) and horizontal (in-plane) incident beam polarizations were used, which allowed us to extract 16 different observables for this transition. In particular, using the ({ital {rvec p}},{ital p}{prime}{gamma}) reaction, we measured the sideways and longitudinal analyzing powers, {ital D}{sub 0{ital S}} and {ital D}{sub 0{ital L}}, which vanish identically in the ({ital {rvec p}},{ital p}{prime}) reaction. Detailed comparisons of all observables to calculations done in both relativistic and nonrelativistic formalisms are presented. Surprisingly, a relativistic description in which knock-on exchange processes are not explicitly included provides the best overall agreement with the data.},
doi = {10.1103/PhysRevC.52.2559},
journal = {Physical Review, C},
number = 5,
volume = 52,
place = {United States},
year = {1995},
month = {11}
}