Thermal Cross Sections

The aim of the following survey is to present (1) the various considerations employed in the assessment of the experimental data, (2) the relationships, methods and principles that have been used in arriving at the recommended parameters, (3) the systematics of s- and p-wave neutron strength functions, radiative widths, and potential scattering radii, and (4) the standards for capture and scattering cross sections and neutron and γ-ray energies. The cited relationships can serve as an easy reference guide. In addition, should the need arise, because of absence of experimental data, the user may appeal to the systematics of data as displayed in the form of large-scale figures. This survey is not intended to be an exhaustive review of the field of neutron physics. For comprehensive and detailed reviews, the user may consult any of the excellent articles or books on the subject [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12]. A discussion of recent results of parity non-conservation (PNC) in transmission measurements can be found in the review article of [13].