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Neutron Slowing Down in a Detector with Absorption

Sara Pozzi ; Imre Pázsit (Institutionen för teknisk fysik, Nukleär teknik)
Nuclear Science and Engineering (0029-5639). Vol. 154 (2006), 3, p. 367 - 373 .
[Artikel, refereegranskad vetenskaplig]

In a recent paper, we presented a simple analytical model to describe the statistics of the number of scattering collisions undergone by fast neutrons as they slow down until they are absorbed. In that study, we assumed that the moderator was infinite and homogeneous, and accounted for scattering and absorption by a single nuclear species. In the present paper, we extend that methodology to the more realistic case of neutron slowing down in a homogeneous mixture. The formulae are derived and evaluated numerically, and the results are found to be in very good agreement with corresponding Monte Carlo simulations. The average value of the number of collisions that a neutron undergoes before being captured is computed. The results for a capture-gated detector composed of hydrogen, carbon, and boron are discussed.

Nyckelord: Neutron slowing down, detectors, absorption, number of collisions, mixture

Denna post skapades 2006-12-07. Senast ändrad 2014-09-02.
CPL Pubid: 24087


Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)



Chalmers infrastruktur