Experiment on direct n-n scattering – the radiation-induced outgassing complication


Journal Article

© 2012 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 ηγ=0.02 molecules/gamma. Possible techniques to reduce the effect of the desorption background are presented.

Full Text

Duke Authors

Cited Authors

  • Stephenson, SL; Crawford, BE; Furman, WI; Lychagin, EV; Muzichka, AY; Nekhaev, GV; Sharapov, EI; Shvetsov, VN; Strelkov, AV; Levakov, BG; Lyzhin, AE; Chernukhin, YI; Howell, CR; Mitchell, GE; Tornow, W; Showalter-Bucher, RA

Published Date

  • December 1, 2012

Published In

Volume / Issue

  • 895 /

Start / End Page

  • 33 - 43

International Standard Serial Number (ISSN)

  • 0375-9474

Digital Object Identifier (DOI)

  • 10.1016/j.nuclphysa.2012.09.005

Citation Source

  • Scopus