Measurement of antineutron-proton annihilation cross sections from 1880-1940 MeV

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6924957

Hicks, A T

Antineutron-proton annihilation cross sections have been measured from 1880-1940 MeV in the center of mass system, with RMS energy resolution ranging from 80 KeV (1880 MeV) to 6.8 MeV (1940 MeV). This represents the first such measurement in the energy region 1880-1895 MeV. The measurements are compared to existing experimental data and theoretical predictions, and are found to be consistent with both. Antineutrons were produced via the charge exchange reaction antipp ..-->.. antinn using a conventional antiproton beam. A liquid hydrogen target served as a source of protons to produce the desired annihilation interaction. The antineutron momentum was measured using the time-of-flight method. A search for narrow width structure in the measured cross sections was done. No significant structure was found and 90% confidence level upper limits of 40-175 mb-MeV were established for the integrated cross section.

• Research Organization: Pennsylvania State Univ., University Park (USA)
• OSTI ID: 6924957
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
ANTIBARYONS
ANTIMATTER
ANTINEUTRONS
ANTINUCLEONS
ANTIPARTICLES
BARYON-BARYON INTERACTIONS
BARYONS
BASIC INTERACTIONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
NEUTRONS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PROTON-NEUTRON INTERACTIONS
PROTON-NUCLEON INTERACTIONS