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Author Wilenzick, R. M. ♦ Mitchell, G. E. ♦ Seth, K. K. ♦ Lewis, H. W.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ CALCIUM ♦ CALCIUM 40 ♦ CARBON ♦ CARBON 13 ♦ CROSS SECTIONS ♦ ENERGY ♦ ENERGY LEVELS ♦ ENERGY RANGE ♦ LEAD ♦ LEAD 208 ♦ MATHEMATICS ♦ MEASURED VALUES ♦ NEUTRON BEAMS ♦ NEUTRON DETECTION ♦ NEUTRON SPECTROMETERS ♦ NEUTRONS ♦ NUCLEAR MODELS ♦ NUCLEAR THEORY ♦ QUANTUM MECHANICS ♦ RESONANCE ♦ TARGETS ♦ VELOCITY
Abstract The neutron tctal cross sections of carbon, calcium, and lead were determined in the energy region 200 to 960 kev using a time-of-flight technique. The observed cross section for carbon was analyzed in terms of the effective- range theory as well as the bound-level contribution. It is concluded that the upper limit for the total width of the "proposed" resonance in C/sup 13/ at 610 kev is 100 ev. For calcium and lead the data are analyzed for resonance parameters. It was found that the s-wave strength function for Ca/sup 40/ increased rapidly with increasing energy. It was concluded also that the course of the lead cross sections can be explained only by the presence of a broad s- wave resonance in Pb/sup 208/. (auth)
ISSN 0031899X
Educational Use Research
Learning Resource Type Article
Publisher Date 1961-02-15
Publisher Department Duke Univ., Durham, N.C.
Journal Physical Review
Volume Number 121
Organization Duke Univ., Durham, N.C.


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