Coherent and incoherent neutron-matter interaction is studied inside a recently introduced approach to subdynamics of a macrosystem. The equation describing the interaction is of the Lindblad type and, using the Fermi pseudopotential, we show that the commutator term is an optical potential leading to well-known relations in neutron optics. The other terms, usually ignored in optical descriptions and linked to the dynamic structure function of the medium, give an incoherent contribution to the dynamics, which keeps diffuse scattering and attenuation of the coherent beam into account, thus warranting fulfillment of the optical theorem. The relevance of this analysis to experiments in neutron interferometry is briefly discussed.

Incoherent dynamics in neutron-matter interaction / L. Lanz, B. Vacchini. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 56:6(1997), pp. 4826-4838.

Incoherent dynamics in neutron-matter interaction

L. Lanz
Primo
;
B. Vacchini
Ultimo
1997

Abstract

Coherent and incoherent neutron-matter interaction is studied inside a recently introduced approach to subdynamics of a macrosystem. The equation describing the interaction is of the Lindblad type and, using the Fermi pseudopotential, we show that the commutator term is an optical potential leading to well-known relations in neutron optics. The other terms, usually ignored in optical descriptions and linked to the dynamic structure function of the medium, give an incoherent contribution to the dynamics, which keeps diffuse scattering and attenuation of the coherent beam into account, thus warranting fulfillment of the optical theorem. The relevance of this analysis to experiments in neutron interferometry is briefly discussed.
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/200077
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