Actinide production in /sup 136/Xe bombardments of /sup 249/Cf

Technical Report · Thu Aug 01 04:00:00 EDT 1985

DOI:https://doi.org/10.2172/5006694· OSTI ID:5006694

Gregorich, K E

The production cross sections for the actinide products from /sup 136/Xe bombardments of /sup 249/Cf at energies 1.02, 1.09, and 1.16 times the Coulomb barrier were determined. Fractions of the individual actinide elements were chemically separated from recoil catcher foils. The production cross sections of the actinide products were determined by measuring the radiations emitted from the nuclides within the chemical fractions. The chemical separation techniques used in this work are described in detail, and a description of the data analysis procedure is included. The actinide production cross section distributions from these /sup 136/Xe + /sup 249/Cf bombardments are compared with the production cross section distributions from other heavy ion bombardments of actinide targets, with emphasis on the comparison with the /sup 136/Xe + /sup 248/Cm reaction. A technique for modeling the final actinide cross section distributions has been developed and is presented. In this model, the initial (before deexcitation) cross section distribution with respect to the separation energy of a dinuclear complex and with respect to the Z of the target-like fragment is given by an empirical procedure. It is then assumed that the N/Z equilibration in the dinuclear complex occurs by the transfer of neutrons between the two participants in the dinuclear complex. The neutrons and the excitation energy are statistically distributed between the two fragments using a simple Fermi gas level density formalism. The resulting target-like fragment initial cross section distribution with respect to Z, N, and excitation energy is then allowed to deexcite by emission of neutrons in competition with fission. The result is a final cross section distribution with respect to Z and N for the actinide products. 68 refs., 33 figs., 6 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5006694
• Report Number(s): LBL-20192; ON: DE86002004
• 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
A CODES
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIDES
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
AMERICIUM 239
AMERICIUM 240
AMERICIUM 242
AMERICIUM 244
AMERICIUM 245
AMERICIUM 246
AMERICIUM 247
AMERICIUM ISOTOPES
BERKELIUM 244
BERKELIUM 245
BERKELIUM 246
BERKELIUM 248
BERKELIUM 249
BERKELIUM 250
BERKELIUM 251
BERKELIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
C CODES
CALIFORNIUM 245
CALIFORNIUM 246
CALIFORNIUM 247
CALIFORNIUM 248
CALIFORNIUM 249 TARGET
CALIFORNIUM 253
CALIFORNIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
CHROMATOGRAPHY
COMPUTER CODES
CROSS SECTIONS
CURIUM 248 TARGET
CURIUM 249
CURIUM ISOTOPES
DATA
DAYS LIVING RADIOISOTOPES
DECAY
DEEP INELASTIC HEAVY ION REACTIONS
EINSTEINIUM 248
EINSTEINIUM 249
EINSTEINIUM 250
EINSTEINIUM 251
EINSTEINIUM 252
EINSTEINIUM 253
EINSTEINIUM 254
EINSTEINIUM 255
EINSTEINIUM 256
EINSTEINIUM ISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ELUTRIATION
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
EXTRACTION APPARATUSES
EXTRACTION CHROMATOGRAPHY
EXTRACTION COLUMNS
FERMI GAS MODEL
FERMIUM 250
FERMIUM 251
FERMIUM 252
FERMIUM 253
FERMIUM 254
FERMIUM 256
FERMIUM ISOTOPES
FISSION
FUNCTIONS
GAMMA SPECTRA
GEV RANGE
GEV RANGE 01-10
H CODES
HALF-LIFE
HEAVY ION REACTIONS
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INFORMATION
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE PRODUCTION
ISOTOPES
MATHEMATICAL MODELS
MENDELEVIUM 256
MENDELEVIUM ISOTOPES
METALS
MINUTES LIVING RADIOISOTOPES
N CODES
NEPTUNIUM 234
NEPTUNIUM 236
NEPTUNIUM 238
NEPTUNIUM 239
NEPTUNIUM 240
NEPTUNIUM ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLUTONIUM 243
PLUTONIUM 245
PLUTONIUM 246
PLUTONIUM ISOTOPES
RADIOISOTOPES
S CODES
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SPECTRA
SPONTANEOUS FISSION
TARGETS
XENON 136 REACTIONS
YEARS LIVING RADIOISOTOPES