Measurement of Pair-Production Cross Section near Threshold
نویسندگان
چکیده
منابع مشابه
Photodisintegration cross section of beryllium near threshold
9 The cross section for photoneutron production in Be at energies of 1. 692, 1. 720, and 1. 78 Mev has been investigated using radioisotope gamma-ray sources. Neutron counting was by manganous sulfate bath and a long counter. Gamma-ray counting was by a scintillation spectrometer consisting of a Nal(Tl) scintillation crystal and a 256-channel pulse^height analyzer. The following results were ob...
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Six kinds of radioisotopes were used to measure cross sections of the "Be(?, n) reaction near its threshold. The results obtained were0.88 5 0.16, 1.33 2 0.24, 1.10 2 0.20, 0.73 5 0.13, 0.47 5 0.09, and 0.18 2 0.04 mb at 1674.7, 1705.2, 1724.9, 1778.9, 1836.0, and 2167.6 keV, respectively. The cross sections measured show a sharp peak near the threshold, and its width is narrower than that obse...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1965
ISSN: 0031-899X
DOI: 10.1103/physrev.140.b630