Analyzing power of neutron-proton elastic scattering at 25 MeV

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6215032

Barker, M D

The analyzing power of neutron-proton elastic scattering was measured at 11 angles from Theta/sub cm/ = 50/sup 0/ to 150/sup 0/ for a neutron bombarding energy of 25.05 MeV to an accuracy of +/-0.002. A preliminary phase shift analysis was performed on the data. Polarized neutrons were produced by bombarding tritium gas with a polarized deuteron beam and utilizing the polarization transfer properties of the T(d,n)/sup 4/He reaction at 0/sup 0/. A hydrogenous scintillator was used as the proton target. Recoil protons in the target scintillator were detected in coincidence with neutrons scatterd into two pairs of scintillation counters (55 cm from the target) which were placed symmetrically about the incident beam direction. A preliminary phase shift analysis was performed on the data. Those nucleon-nucleon phase shifts which can be determined using p-p data were held fixed in this analysis. Under this constraint, the phase shift analysis was unable to fit the measured data at back angles. The present measurements, as well as a previous measurement of the n-p analyzing power at 16.9 MeV, indicate that the analyzing power at back angles falls off faster than predicted by global phase shift analyses or semi-phenomenological nucleon-nucleon potentials.

• Research Organization: Wisconsin Univ., Madison (USA)
• OSTI ID: 6215032
• Country of Publication: United States
• Language: English

Related Subjects

651225* -- Nuclear Properties & Reactions
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
ANGULAR DISTRIBUTION
BARYON REACTIONS
BEAMS
DATA
DISTRIBUTION
ELASTIC SCATTERING
ENERGY RANGE
EXPERIMENTAL DATA
HADRON REACTIONS
HYDROGEN 1 TARGET
INFORMATION
MEV RANGE
MEV RANGE 10-100
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PHASE SHIFT
POLARIZED BEAMS
SCATTERING
TARGETS