A calibration of the n-p elastic spin correlation parameter C{sub NN} at T{sub n}=183 MeV

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:387204

Bowyer, T W; Bloch, C; Bowyer, S M ^[1]

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1. and others

The absolute normalization of the spin correlation parameter C{sub NN} for {tilde n}-{tilde p} scattering at intermediate energies is known to be sensitive to the {sup 1}P{sub 1} phase shift parameter. We have utilized a new technique to calibrate the normalization of C{sub NN} data previously taken at IUCF by simultaneous measurement of the {tilde n}-{tilde p} and {tilde p}-{tilde p} elastic scattering analyzing powers performed with a mixed beam containing polarized neutrons and protons. The p-p elastic scattering analyzing power has been previously determined to <1% in our energy regime in an experiment at IUCF using a cross-calibration to {tilde p} +{sup 12}C elastic scattering. We fit our {tilde p}-{tilde p} scattering yield to these data to determine the target polarization {+-}2%. Since charge symmetry holds for {tilde n}-{tilde p} scattering (A{sub n}=A{sub p}) to {approx}10{sup -3}, this target polarization fixes the neutron beam polarization to {+-}3%. Using these data we expect to determine the C{sub NN} normalization to about {+-}5%. Systematic errors in the analysis and C{sub NN} results will be discussed.

• OSTI ID: 387204
• Report Number(s): CONF-931044--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CALIBRATION
CARBON 12 TARGET
ELASTIC SCATTERING
POLARIZATION-ASYMMETRY RATIO
PROTON REACTIONS
PROTON-PROTON INTERACTIONS