FISSION OF Ra$sup 226$ BY DEUTERONS AND HELIUM IONS

Journal Article · Sun May 01 04:00:00 EDT 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.118.771· OSTI ID:4182512

Jensen, R C; Fairhall, A W

Fission induced in Ra/sup 226/ by 14.5- and 21.5-Mev deuterons, and by 23.5-. 31-. and 43 Mev He ions was studied using radiochemical techniques. The mass distributions of fission products for deuteron-induced fission is triplehumped, corresponding to separate symmetric and asymmetric fission modes. The symmctric mode dominates at the higher bombarding energy. The mass distributions oblook more "normal":asymmetric at the lowest bombard ing energy becoming a single broad peak at the highest bombarding energy. These results are interpreted in terms of a symmetric fission mode which increases stronply with increasing excitation energy, and an asymmetric fission mode which occurs mainly at low excitation energies following neutron evaporation from highly excited compound nuclci. Asymmetric fission is interpreted to be disappearing as a fission mode for nuclci of lower atomic number than thorium. (auth)

• Research Organization: Univ. of Washington, Seattle
• NSA Number: NSA-14-016306
• OSTI ID: 4182512
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 118; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COMPOUND NUCLEI
DEUTERON BEAMS
DISTRIBUTION
ENERGY
ENERGY RANGE
EVAPORATION
EXCITATION
FISSION
FISSION PRODUCTS
HELIUM
ION BEAMS
MASS
MEASURED VALUES
MEV RANGE
NEUTRONS
NUCLEAR MODELS
NUCLEI
PHYSICS
RADIOCHEMISTRY
RADIUM 226
THORIUM