Neutron absorption cross section of americium-241

Journal Article · Mon Nov 01 04:00:00 EST 1976 · Nucl. Sci. Eng.; (United States)

OSTI ID:7256187

Weston, L W; Todd, J H

The /sup 241/Am neutron absorption cross section, which is predominantly capture, has been measured from 0.01-eV to 370-keV neutron energy. The Oak Ridge Electron Linear Accelerator was used as the source of pulsed neutrons. Resonance parameters have been derived for the data up to 50 eV. The capture gamma-ray detector used was the ''total energy detector,'' which is a modification of the Moxon-Rae detector. This detector required that the events be weighted by their pulse height in the detector and that the net efficiency of the detector be low. The cross section was normalized at thermal-neutron energies (0.02 to 0.03 eV), and the shape of the neutron flux was measured relative to the /sup 10/B(n,..cap alpha..) cross section up to 2 keV and relative to the /sup 6/Li(n,..cap alpha..) cross section at higher neutron energies. The results of the measurement indicate a lower cross section (approximately 25 percent) between 0.3 and 100 eV than has been previously indicated and an appreciably higher cross section (by 100 percent at 100 keV) from 20 to 370 keV.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 7256187
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 61:3; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

652025* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
AMERICIUM 241 TARGET
BARYON REACTIONS
CAPTURE
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
HADRON REACTIONS
INTEGRALS
IONIZING RADIATIONS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
RADIATIONS
RESONANCE INTEGRALS
TARGETS