A systematic study of actinide production from the interactions of heavy ions with sup 248 Cm
Production cross sections for heavy actinides produced from the interactions of {sup 12}C, {sup 31}P, {sup 40}Ar, and {sup 44}Ca ions with {sup 248}Cm were measured at energies ranging from 0.98 to 1.35 X Coulomb barrier. The recoiling reaction products were collected in copper or gold catcher foils located near the {sup 248}Cm target. Separate fractions of Bk, Cf, Es, Fm, and Md were obtained from a radiochemical separation procedure. For the {sup 12}C system, a He/KCl jet was used to transport the recoiling No activities of interest to a rotating wheel system. The isotopic distributions of the actinide products were found to be essentially symmetric about the maximum with full-widths-at-half-maximum of approximately 2.5 mass units. Isotopic distributions of the {sup 12}C, {sup 31}P, {sup 40}Ar, and {sup 44}Ca systems were found to be very similar to the {sup 40,48}Ca systems studied previously. The maxima of the isotopic distributions generally occurred for those reaction channels which involved the exchange of the fewest number of nucleons between the target and projectile for which the calculated excitation energy was a positive quantity. Additionally, the maxima of the excitation functions occurred at those projectile energies which were consistent with the calculated reaction barriers based upon a binary reaction mechanism. The experimental data from the four systems investigated were compared to several models of heavy ion interactions including a damped reaction mechanism, compound nucleus formation and subsequent particle evaporation, and classical partial wave calculations for binary systems.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6475811
- Report Number(s):
- LBL-29540; ON: DE91004421; TRN: 90-036819
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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Excitation functions for actinides produced in the interactions of sup 31 P with sup 248 Cm
Excitation functions for production of heavy actinides from interactions of /sup 40/Ca and /sup 48/Ca ions with /sup 248/Cm
Related Subjects
ACTINIDES
ISOTOPE PRODUCTION
CURIUM 248 TARGET
HEAVY ION REACTIONS
ARGON 40 REACTIONS
CALCIUM 44 REACTIONS
CARBON 12 REACTIONS
CROSS SECTIONS
DATA ACQUISITION SYSTEMS
EXCITATION
EXPERIMENTAL DATA
FT VALUE
PHOSPHORUS 31 REACTIONS
TRANSFER REACTIONS
CHARGED-PARTICLE REACTIONS
DATA
DIRECT REACTIONS
ELEMENTS
ENERGY-LEVEL TRANSITIONS
INFORMATION
METALS
NUCLEAR REACTIONS
NUMERICAL DATA
TARGETS
652020* - Nuclear Properties & Reactions
A=220 & above
Experimental