The total neutron cross sections of /sup 249/Bk and /sup 249/Cf below 100 eV

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Nucl. Sci. Eng.; (United States)

OSTI ID:6432154

Benjamin, R W; Carlton, R F; Harvey, J A; Hill, N W; Pandey, M S

The neutron total cross sections of /sup 249/Bk and /sup 249/Cf have been measured from 0.03 to 100 eV using the Oak Ridge Electron Linear Accelerator as a source of pulsed neutrons. The 1.6-mm-diam cylindrical transmission samples initially contained up to 5.3 mg of 98% /sup 249/Bk and 2% /sup 249/Cf; 4.5 yr later, when the final measurements were made, the composition of the samples had become 2.5% /sup 249/Bk, 96.9% /sup 249/Cf, and 0.6% /sup 245/Cm. Samples were cooled with liquid nitrogen to reduce Doppler broadening. Thirty-nine resonances were identified in /sup 249/Bk and analyzed using a single-level Breit-Wigner formalism. Fifty-five resonances were identified in /sup 249/Cf and analyzed using an R-matrix multilevel formalism. The resonance parameters obtained have been used to determine the average level spacings and the s-wave neutron and fission strength functions. Where possible, bound-level parameters were derived to fit the thermal neutron total cross-section data.

• Research Organization: E.I. du Pont de Nemours and Company, Savannah River Laboratory, Aiken, South Carolina
• OSTI ID: 6432154
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 85:3; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BARYONS
BERKELIUM 249
BERKELIUM 249 TARGET
BERKELIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BREIT-WIGNER FORMULA
CALIFORNIUM 249
CALIFORNIUM 249 TARGET
CALIFORNIUM ISOTOPES
CROSS SECTIONS
CURIUM 245
CURIUM ISOTOPES
DAYS LIVING RADIOISOTOPES
DOPPLER BROADENING
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL DENSITY
EV RANGE
EVEN-ODD NUCLEI
FERMIONS
FUNCTIONS
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
ISOTOPE RATIO
ISOTOPES
LINE BROADENING
LINEAR ACCELERATORS
MULTILEVEL ANALYSIS
NEUTRON REACTIONS
NEUTRON SOURCES
NEUTRON SPECTRA
NEUTRONS
NITROGEN
NONMETALS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
ORELA
PARTIAL WAVES
PARTICLE SOURCES
PULSED NEUTRON TECHNIQUES
RADIATION SOURCES
RADIOISOTOPES
RESONANCE
S WAVES
SPECTRA
STRENGTH FUNCTIONS
TARGETS
THERMAL NEUTRONS
TOTAL CROSS SECTIONS
YEARS LIVING RADIOISOTOPES