Low energy upscattering of UCN in interaction with the surface of solid state

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• 作者：A. Serebrov ; A. Vassiljev ; M. Lasakov ; I. Krasnoschekova ; A. Fomin ; P. Geltenbort ; E. Siber
• 关键词：Ultracold neutrons ; Anomalous losses
• 刊名：Physics Letters A
• 出版年：2007
• 出版时间：30 July 2007
• 年：2007
• 卷：367
• 期：4-5
• 页码：268-270
• 全文大小：118 K

文摘

In connection with the problem of anomalous losses of ultracold neutrons (UCN) in the storage in the material traps the measurements of quasi-elastic scattering of UCN in collisions with trap surface coated with beryllium have been carried out. It was observed that the probability of quasi-elastic scattering of UCN from energy interval 0–77 neV to 90–200 neV is (2.2±0.2)×10⁻⁸ per collision therefore the process of quasi-elastic scattering cannot explain the effect of anomalous losses which is on the level 3×10⁻⁵.