Excitation functions for production of heavy actinides from interactions of /sup 40/Ca and /sup 48/Ca ions with /sup 248/Cm
Excitation functions have been measured for production of isotopes of Bk through Fm in bombardments of /sup 248/Cm with 234- to 294-MeV /sup 40/Ca ions and with 239- to 318-MeV /sup 48/Ca ions. The maxima of the isotopic distributions for these elements occur at only 2 to 3 mass numbers larger for /sup 48/Ca than for /sup 40/Ca reactions. The shapes of the distributions and the half-widths of about 2.5 mass numbers are quite similar to those observed previously for reactions of /sup 16/O, /sup 18/O, /sup 20/Ne, and /sup 22/Ne with /sup 248/Cm. In general, the excitation functions for /sup 40/Ca show maxima near the Coulomb barrier while those for /sup 48/Ca are about 20 MeV above the barrier. The cross sections decrease rather slowly with increasing projectile energy over the energy range studied, indicating that the additional projectile energy is not manifested as excitation energy of these actinide products.
- Research Organization:
- Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 5772742
- Journal Information:
- Phys. Rev. C; (United States), Vol. 31:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BERKELIUM ISOTOPES
ISOTOPE PRODUCTION
CALCIUM 40 REACTIONS
COMPOUND-NUCLEUS REACTIONS
CALCIUM 48 REACTIONS
CALIFORNIUM ISOTOPES
CURIUM 248 TARGET
EINSTEINIUM ISOTOPES
FERMIUM ISOTOPES
ANGULAR DISTRIBUTION
COULOMB FIELD
CROSS SECTIONS
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
MASS SPECTRA
MEV RANGE 100-1000
ACTINIDE ISOTOPES
CHARGED-PARTICLE REACTIONS
DATA
DISTRIBUTION
ELECTRIC FIELDS
ENERGY RANGE
FUNCTIONS
HEAVY ION REACTIONS
INFORMATION
ISOTOPES
MEV RANGE
NUCLEAR REACTIONS
NUMERICAL DATA
SPECTRA
TARGETS
652025* - Nuclear Properties & Reactions
A=220 & above
Experimental- Nuclear Reactions & Scattering- (-1987)