INDEPENDENT YIELDS OF ISOMERIC PAIRS IN NUCLEAR REACTIONS (thesis)
The Cd/sup 115m/ and Cd/sup 115/ isomers produced in 12- to 340Mev proton bombardments of U/sup 238/ were isolated by radiochemical methods. The cumulative yield ratios of Cd/sup 115/Cd/sup 115m/Cd/ were determined. In the 45- Mev heliumion flssion of uranium, an estimation of the independentyield ratio of Pm/sup 148/ (5.3-day) to Pm/sup 148/ (43-day) was made. In the deuteron fission of uranium at about 20 Mevs an estimate of the independent-yield ratio of Nb/sup 95m/ to the total niobium of mass 95 was made. A literature survey on experimental isomer ratios from fission was made. The yield ratio of Sc/sup 44// Sc/sup 44/ was measured in Sc/sup 45/ ( alpha , alpha n)Sc/sup 44/ reactions with helium ions of energies between 20 and 43 Mev and at 320 Mev. The Sc/sup 44m/Sc/ sup 44/ ratio was measured in K/sup 41/( alpha ,n)Sc/sup 44/ reactions at 10 and 43 Mev. The compound-nucleus model was used to calcalate the Sc/sup 44m/Sc/sup 44/ ratios produced by the reactions /sup n44/ and Sc/sup 45/(p,pn)Sc/sup 44/ at energies 0.4 Mev above threshold. Agreement between the experimental and calculated Sc/sup 44m/Sc/sup 44/ ratio was obtained for the K/sup 41/(l0-Mev alpha ,n)Sc/sup 44/ reaction. A classical knock-on model was used to calculate the Sc/sup 44m/Sc/sup 44/ ratio from a Sc/sup 45/( alpha , alpha ,n)Sc/sup 44/ or reaction in which the charged particle strikes a neutron and both particles go out. This calculated isomer ratio agreed fairly well with the experimental isomer ratio for 320-Mev helium ions which are assumed to have such a small wave length that the projectile interacts classically with only one nucleon. It is assumed that the K/sup 41/(43-Mev alpha ,n)Sc/sup 44/ and the Sc/sup 45/( alpha , alpha n)Sc/sup 44/ reactio ns in the 20- to 43-Mev energy range occur by means of a direct-interaction mechanism. (auth)
- Research Organization:
- University of California, Lawrence Radiation Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-13-014786
- OSTI ID:
- 4243268
- Report Number(s):
- UCRL-8710
- Country of Publication:
- United States
- Language:
- English
Similar Records
YIELD RATIOS FOR THE ISOMERIC PAIR Sc$sup 44$m$sup 44$ FORMED IN (cap alpha, cap alpha n) AND (cap alpha,N) REACTIONS
Evidence for Low-Momentum-Transfer Process in K41 (α, n )Sc 44m,g Reactions from Range Measurements of Products
Ratio of Cross Sections for Production of an Sc$sup 44$ Isomer Pair in Reactions Involving Heavy Ions; OTNOSHENIE SECHENII OBRAZOVANIYA IZOMERNOI PARY Sc$sup 44$ V REAKTSIYAKH S TYAZHELYMI IONAMI
Journal Article
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Sat Jul 15 00:00:00 EDT 1961
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
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OSTI ID:4839777
Evidence for Low-Momentum-Transfer Process in K41 (α, n )Sc 44m,g Reactions from Range Measurements of Products
Journal Article
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Tue Feb 28 23:00:00 EST 1961
· Canadian Journal of Chemistry
·
OSTI ID:4066231
Ratio of Cross Sections for Production of an Sc$sup 44$ Isomer Pair in Reactions Involving Heavy Ions; OTNOSHENIE SECHENII OBRAZOVANIYA IZOMERNOI PARY Sc$sup 44$ V REAKTSIYAKH S TYAZHELYMI IONAMI
Technical Report
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Mon Dec 31 23:00:00 EST 1962
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OSTI ID:4646185
Related Subjects
ALPHA PARTICLES
CADMIUM 115
COMPOUND NUCLEI
DEUTERONS
DIRECT REACTIONS
ENERGY RANGE
EXCITATION
FISSION
HELIUM
IONS
ISOMERS
MEASURED VALUES
NEUTRONS
NIOBIUM 95
NUCLEAR REACTIONS
NUCLEI
NUMERICALS
PHYSICS AND MATHEMATICS
POTASSIUM 41
PRASEODYMIUM 148
PROTON BEAMS
RADIOCHEMISTRY
SCANDIUM 44
SCANDIUM 45
URANIUM 238
CADMIUM 115
COMPOUND NUCLEI
DEUTERONS
DIRECT REACTIONS
ENERGY RANGE
EXCITATION
FISSION
HELIUM
IONS
ISOMERS
MEASURED VALUES
NEUTRONS
NIOBIUM 95
NUCLEAR REACTIONS
NUCLEI
NUMERICALS
PHYSICS AND MATHEMATICS
POTASSIUM 41
PRASEODYMIUM 148
PROTON BEAMS
RADIOCHEMISTRY
SCANDIUM 44
SCANDIUM 45
URANIUM 238