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Measured Thermal-Neutron Cross Section for the 59Ni(n, α)56Fe Reaction

R. Werner, D.C. Santry

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Abstract

Deviations from normal mechanical properties observed in stainless steel irradiated by neutrons have been attributed to the production of helium in neutron reactions with nickel. A measurement of the thermal-neutron cross section for the 59Ni(n,α)56Fe reaction has been made in which the alpha-particle emission was determined by a silicon surface-barrier particle spectrometer. The 2200 m/sec cross section obtained is 18.0±1.6 b. This value disagrees with 13.7 ± 0.6 b reported earlier by Eiland and Kirouac.

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What this paper is about

Deviations from normal mechanical properties observed in stainless steel irradiated by neutrons have been attributed to the production of helium in neutron reactions with nickel. A measurement of the thermal-neutron cross section for the 59Ni(n,α)56Fe reaction has been made in which the alpha-particle emission was determined by a silicon surface-barrier particle spectrometer. The 2200 m/sec cross section obtained is 18.0±1.6 b. This value disagrees with 13.7 ± 0.6 b reported earlier by Eiland and Kirouac.

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Available abstract

Deviations from normal mechanical properties observed in stainless steel irradiated by neutrons have been attributed to the production of helium in neutron reactions with nickel. A measurement of the thermal-neutron cross section for the 59Ni(n,α)56Fe reaction has been made in which the alpha-particle emission was determined by a silicon surface-barrier particle spectrometer. The 2200 m/sec cross section obtained is 18.0±1.6 b. This value disagrees with 13.7 ± 0.6 b reported earlier by Eiland and Kirouac.

Key concepts: Neutron temperature, Neutron, Cross section (physics), Materials science, Nuclear reaction, Alpha particle, Spectrometer, Nuclear physics

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