Author/Authors :
S.L. Stephenson، نويسنده , , B.E. Crawford، نويسنده , , W.I. Furman، نويسنده , , E.V. Lychagin، نويسنده , , A.Yu. Muzichka، نويسنده , , G.V. Nekhaev، نويسنده , , E.I. Sharapov، نويسنده , , V.N. Shvetsov، نويسنده , , A.V. Strelkov، نويسنده , , B.G. Levakov، نويسنده , , A.E. Lyzhin، نويسنده , , Yu.I. Chernukhin، نويسنده , , C.R. Howell، نويسنده , , G.E. Mitchell، نويسنده , , Walter W. Tornow، نويسنده , , R.A. Showalter-Bucher، نويسنده ,
Abstract :
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 image. Possible techniques to reduce the effect of the desorption background are presented.
Keywords :
neutron–neutron interaction , feasibility to deduce ?nn?nn , measured , View the MathML sourcen1(n , InIn using 3He thick and thin ionization detector and n4He TOF , N) , analyzed , electron energy deposition in walls and radiation-induced desorption , neutron–neutron scattering length , EnEn , NUCLEAR REACTIONS
