RT Journal Article
T1 Neutron fibres: a possible application of neutron optics
A1 Fernández Álvarez-Estrada, Ramón
A1 Calvo Padilla, María Luisa
AB The authors study confined propagation of slow (thermal) neutrons along (non-hollow) solid fibres made of certain elements (Ti, Mn, ...) such that amplitude for the low-energy nuclear scattering of neutrons on them be negative. Geometrical optics and quasiclassical descriptions, procedures for confining the neutrons, and some applications to radiotherapy are outlined. The confined propagation modes for slow neutrons along infinite homogeneous circular fibres without and with nuclear absorption are analysed. Some estimates of the spectral density in the neutron flux and its attenuation are outlined. In order to assess lattice periodicity effects, the potential seen by a neutron inside an infinite periodic solid fibre and its confined propagation are discussed in detail. Here the authors find wide allowed and small forbidden bands for the neutron energy along the periodic fibre: well inside the allowed bands the neutron propagation modes reduce, as a first approximation, to those for the homogeneous fibre. Lattice vibration effects and the penetration, confinement and eventual scattering of neutrons by a homogeneous fibre are also analysed.
PB IOP Publishing Ltd
SN 0022-3727
YR 1984
FD 1984
LK https://hdl.handle.net/20.500.14352/64941
UL https://hdl.handle.net/20.500.14352/64941
LA eng
NO © 1984 The Institute of PhysicsWe are grateful to M. Chevalier and to Drs. V. Alcober and O. Schaerpf for useful discussions. The partial financial support given by Comisión Asesora de Investigación Científica y Técnica, Spain, is also acknowledged.
NO Comisión Asesora de Investigación Científica y Técnica (CAICYT), España
NO Ministerio de Educación y Ciencia (MEC), España
DS Docta Complutense
RD 6 abr 2025