Inelastic neutron-scattering studies of sup 238 U and sup 232 Th on states above 300 keV for incident energies above 2. 2 MeV

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6996517

Aliyar, A

Differential cross sections have been measured at incident energies from 2.3 to 3.0 MeV for vibrational states between 600 and 1000 keV in {sup 232}Th and {sup 238}U, as well as for the 307.4 keV level in uranium and the 333.2 keV level in thorium which are members of ground state rotational band. Excitation functions for these levels have been obtained over the incident energy range 2.3-3.0 MeV in 100-keV steps. Angular distributions for these states were measured at 2.4 and 2.8 MeV. The data were obtained via the neutron time-of-flight technique using the University of Lowell 5.5 MV pulsed Van-De-Graaff accelerator with Mobley bunching system. The bunched pulse durations were less than 1 ns. Pulse shape discrimination (PSD) was employed to suppress gamma-ray background. Data reduction included, background, tail and fission subtraction; correlations were made for multiple scattering and for finite sample size effects. Studies were developed, employing a user interactive code to generate scattered neutron group response functions from the shape of elastic and inelastic scattering peaks obtained from measurements on elemental iron. The results are compared with theoretical calculations and previous measurements.

• Research Organization: Lowell Univ., MA (USA)
• OSTI ID: 6996517
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
652020 -- Nuclear Properties & Reactions
A=220 & above
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ANGULAR DISTRIBUTION
CALCULATION METHODS
CROSS SECTIONS
DATA
DATA ANALYSIS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
HEAVY NUCLEI
INELASTIC SCATTERING
INFORMATION
ISOTOPES
MEASURING INSTRUMENTS
MEASURING METHODS
NEUTRON SPECTROSCOPY
NUCLEI
NUMERICAL DATA
RADIOISOTOPES
SCATTERING
SPECTROSCOPY
THORIUM 232
THORIUM ISOTOPES
TIME-OF-FLIGHT METHOD
URANIUM 238
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES