RARE NUCLEAR REACTIONS INDUCED BY 14.8 Mev NEUTRONS
Activation cross sections for 14.8 plus or minus 0.8 Mev neutrons were measured for STA(n,n alpha ) + (n, alpha n)! reactions on the isotopes Cu/sup 65/ , Zn/sup 70/, Ga/sup 71/, and Nb/sup 93/, while maximum crosssection limits for this reaction were determined for V/sup 51/, Ge/sup 76/, Br/sup 81/, Rb/sup 97/, Ag/sup 107/, Ag/sup 109/, In/sup 115/, Au/su p 197/, and Tl/sup 203/. Crosssection limits also were established for (n,2p) reactions on Si/sup 29/, K/ sup 41/, Sc/sup 45/, Ti/sup 50/, V/sup 51/, Mn/sup 55/, As/sup 75/, Y/sup 89/, Nb/ sup 93/, Cs/sup 133/, La/sup 139/, Pr/sup 141/ and Tb/sup 159/; and for (n,He) reactions on K/sup 41/, Sc/sup 45/, V/sup 51/, Mn/sup 55/, Co/sup 59/, Cu/sup 63/ , As/sup 75/, Nb/sup 93/, Rh/sup 10 3/, Cs/sup 133/, Au/sup 197/, and Tl/sup 205/. Cross-section values for (n, gamma ) reactions on Y/sup 89/, Nb/sup 93/ and Pr/ sup 141/ and cross-section limits for (n,3n) reactions on Pr/sup 141/, Au/sup 197/ , and Tl/sup 203/ were determined. The STA(n,np) + (n,pn)! reaction was detected with Ni/sup 58/ but not with Mo/sup 92/. A cross-section value was established for the former and a maximum limit for the latter. Absolute disintegration rates required for these determinations were obtained by employing BETA and gamma counting methonds, while monitor reactions served to eliminate neutron flux measurements. Extensive use was made of radiochemical separations in order to isolate the low-yield, rare-reaction pronducts. The Statistical Theory of nuclear reactions was employed (using parameters selected from a critical analysis of current literature) to make extensive theoretical cross-section calculations for many of the isotopes studied. Agreements between experimental and theoretical values are discussed. (M.P.G.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-001077
- OSTI ID:
- 4154576
- Resource Relation:
- Other Information: Thesis. Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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RARE NUCLEAR REACTIONS INDUCED BY 14.7-Mev NEUTRONS
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Related Subjects
ACTIVATION
ALPHA PARTICLES
ARSENIC 75
BETA DETECTION
BROMINE 81
CESIUM 133
COBALT 59
COPPER 63
COPPER 65
CROSS SECTIONS
ENERGY RANGE
GALLIUM 71
GAMMA DETECTION
GERMANIUM 76
GOLD 197
HELIUM 3
INDIUM 115
LANTHANUM 139
MANGANESE 55
MEASURED VALUES
MEV RANGE
NEUTRON BEAMS
NICKEL 58
NIOBIUM 93
NUCLEAR REACTIONS
NUMERICALS
POTASSIUM 41
PRASEODYMIUM 141
PROTONS
RADIOCHEMISTRY
RUBIDIUM 87
SCANDIUM 45
SILICON 29
SILVER 107
SILVER 109
STATISTICS
TERBIUM 159
THALLIUM 203
TITANIUM 50
VANADIUM 51
YTTRIUM 89
ZINC 70