Coherent scattering of slow neutrons at nanoparticles inparticle physics experimentsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 февраля 2017 г.
Аннотация:Usually Ultra Cold Neutrons (UCN) and Very Cold Neutrons (VCN) are not efficiently scattered by
individual atoms in matter due to their large wavelength. On the contrary, such neutrons are coherently
scattered by nanoparticles, providing a powerful tool, in particular for VCN reflectors, for VCN storage in
closed traps, probably for ‘quasi-specular’ reflectors for cold neutrons, and for cooling VCN to the UCN
energy range. On the other hand, quasi-elastic scattering of UCN at nanoparticles and large molecules
(as those of Fomblin oil) in all presently used UCN trap wall materials causes false effect sin the neutron
lifetime measurements because of poorly controlled spectrum evolution.