Author/Authors :
Sobolev، نويسنده , , Yu. and Lauer، نويسنده , , Th. and Borisov، نويسنده , , Yu. and Daum، نويسنده , , M. and du Fresne، نويسنده , , N. and Gِltl، نويسنده , , L. and Hampel، نويسنده , , G. and Heil، نويسنده , , Larry W. and Knecht، نويسنده , , A. and Keunecke، نويسنده , , M. and Kratz، نويسنده , , J.V. and Lang، نويسنده , , T. and Meister، نويسنده , , M. and Plonka-Spehr، نويسنده , , Ch. and Pokotilovski، نويسنده , , Yu. and Reichert، نويسنده , , P. and Schmidt، نويسنده , , U. and Krist، نويسنده , , Th. and Wiehl، نويسنده , , N. and Zenner، نويسنده , , J.، نويسنده ,
Abstract :
At the ultracold neutron (UCN) source of the TRIGA research reactor in Mainz, we have measured for the first time the material optical wall-potential of cubic boron nitride. The measurements were performed with a time-of-flight (TOF) spectrometer. The samples investigated had a wall-potential of ( 305 ± 15 ) neV . This value is in good agreement with the result extracted from neutron reflectometry data and theoretical expectations. Because of its high critical velocity for UCN and its good dielectric characteristics, cubic boron nitride coatings (isotopically enriched) will be useful for a number of applications in UCN experiments.
