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Author Chrien, R. E. ♦ Benade, A. H.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ BETATRONS ♦ COMPOUND NUCLEI ♦ CROSS SECTIONS ♦ DETECTION ♦ EFFICIENCY ♦ EXCITATION ♦ MEASURED VALUES ♦ NUCLEI ♦ PHOTONEUTRONS ♦ PHOTOPRODUCTION ♦ PROPORTIONAL COUNTERS ♦ PROTONS ♦ X RADIATION
Abstract The ratio of proton to neutron yields from aluminum and copper irradiated with betatron x rays up to 20.8 Mev in energy was measured. Simultaneous detection of protons and neutrons is accomplished by placing two samples of the same element in series in the x-ray beam. Direct detection methods are used in each case, a shallow proportional counter for protons and a boron-lined detector for neutrons. A photon difference methcd was used to reduce yield data to cross section form. The proton and neutron yields for aluminum are found to be approximately equal at 20 Mev with cross sections of 19 and 21 millibarns, respectively. At 20.8 Mev a yield ratio of one proton to abcut 6 neutrons is found for copper, with a peak photoproton cross section of 23 millibarns. The results are compared to a calculation based on the assumption that these reactions proceed through the formation of a compound nucleus. (auth)
ISSN 0031899X
Educational Use Research
Learning Resource Type Article
Publisher Date 1960-07-15
Publisher Department Case Inst. of Tech., Cleveland
Journal Physical Review
Volume Number 119
Organization Case Inst. of Tech., Cleveland


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