Experiment on direct nn scattering — The radiation-induced outgassing complication
Nuclear Physics A(2012)
摘要
The first direct neutron–neutron scattering experiment using the YAGUAR pulsed reactor has yielded initial results. They show a unforeseen significant thermal neutron background as a result of radiation-induced desorption within the scattering chamber. Thermal neutrons are mostly scattering not from other neutrons but instead from the desorbed gas molecules. Analysis of the obtained neutron time-of-flight spectra suggests neutron scattering from H2 molecules. The presented desorption model agrees with our experimental value of the desorption yield ηγ=0.02molecules/gamma. Possible techniques to reduce the effect of the desorption background are presented.
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关键词
Nuclear reactions,measured,analyzed
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