Possibilities for a neutron-proton bremsstrahlung experiment at WNR/LAMPF (Los Alamos Meson Physics Facility)

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6995902

Wender, S A; Nelson, R O; Laymon, C M; Schillaci, M; Gibson, B F

The high energy and high intensity of the continuous energy (white) neutron source at the WNR target area of the Los alamos Meson Physics Facility (LAMPF) may make possible a direct measurement of the neutron-proton bremsstrahlung (NPB) cross section. Several recent papers have discussed the operation of the WNR white neutron source in detail so we will just include a short description of the relevant properties of the source in this article. Next we will describe one possible method of measuring the NPB cross section which is based on two calorimetric detectors that measure the energies of the scattered neutrons and the recoil protons. There are several advantages in using a white neutron source for this type of measurement. First, a wide range of incident neutron energies may be covered. In the case of the WNR, the energy range is from below 50 MeV to over 400 MeV which is above the pion production threshold. Second, all incident neutron energies are measured simultaneously. The greatly reduces the systematic errors associated with sequential measurements at different beam energies when measuring the energy dependence of the NPB cross section. Third, the neutron beam is shared amongst several experimenters at WNR. This greatly reduces the competition for beam time, so longer runs are often possible compared to facilities that require the dedicated use of the accelerator. In the past, typical experiments have run for several months. 6 refs., 5 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6995902
• Report Number(s): LA-UR-90-1242; CONF-900179--2; ON: DE90010571
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301 -- Particle Accelerators-- Ion Sources
645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BEAMS
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ENERGY DEPENDENCE
HADRON-HADRON INTERACTIONS
INTERACTIONS
NEUTRON BEAMS
NEUTRON SOURCES
NUCLEAR REACTIONS
NUCLEON BEAMS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE BEAMS
PARTICLE INTERACTIONS
PARTICLE SOURCES
PROTON BEAMS
PROTON-NEUTRON INTERACTIONS
PROTON-NUCLEON INTERACTIONS
RADIATION SOURCES
RADIATIONS
SPALLATION
TIME-OF-FLIGHT METHOD