Search for an anomalous transmission of ultracold neutrons through metal foils
Muzychka Al.Yu., Pokotilovskii Yu.N., Geltenbort P.
PACS: 28.20.-v
The results are presented of the search for the anomalous transmission of ultra-cold neutrons (UCN) through beryllium (thickness ~ 0.14 mm), stainless steel (0.05 and 0.015 mm) and copper (0.01 and 0.018 mm) foils. This anomalous transmission is considered as one of the possible reasons for UCN "disappearance" from beryllium bottles, discovered in the experiments at St.Petersburg Nuclear Physics Institute and was recently observed in the experiment [3]. No transmission was found in our measurements at the level 10"7 except for the case of copper foils which we attribute to the admixture in the UCN flux of neutrons with the energies higher than the boundary energy for copper.
Home
![](/ps/1001/article_15210_800_head.png "The results are presented of the search for the anomalous transmission of ultra-cold neutrons (UCN) through beryllium (thickness ~ 0.14 mm), stainless steel (0.05 and 0.015 mm) and copper (0.01 and 0.018 mm) foils. This anomalous transmission is considered as one of the possible reasons for UCN "disappearance" from beryllium bottles, discovered in the experiments at St.Petersburg Nuclear Physics Institute and was recently observed in the experiment [3]. No transmission was found in our measurements at the level 10"<sup>7</sup> except for the case of copper foils which we attribute to the admixture in the UCN flux of neutrons with the energies higher than the boundary energy for copper.")