A Thermal Neutron Velocity Selector and Its Application to the Measurement of the Cross Section of Boron

E. Fermi; J. Marshall; L. Marshall

doi:10.1103/PhysRev.72.193

A Thermal Neutron Velocity Selector and Its Application to the Measurement of the Cross Section of Boron

E. Fermi^*,†, J. Marshall^*,†, and L. Marshall^*,†

Argonne National Laboratory, University of Chicago, Chicago, Illinois

^*The information contained in this document will appear in Division IV of the MPTS as part of the contribution of the Argonne National Laboratory.
^†All three authors now at Institute for Nuclear Studies, University of Chicago.

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Phys. Rev. 72, 193 – Published 1 August, 1947

DOI: https://doi.org/10.1103/PhysRev.72.193

Abstract

A mechanical velocity selector for the study of monochromatic neutrons in the range of energies below 0.3 ev is described.

The instrument has been applied to the measurement of the cross section of boron, which is found to be 703× $10^{- 24}$ ${cm}^{2}$ for neutrons of 2200 meters per second velocity.

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A Thermal Neutron Velocity Selector and Its Application to the Measurement of the Cross Section of Boron

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A Thermal Neutron Velocity Selector and Its Application to the Measurement of the Cross Section of Boron

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