Theoretical and experimental data for the neutron cross sections of 1H are surveyed and values recommended for total and partial cross sections in the energy range 0.0001 eV to 20 MeV. Available experimental data are supplemented where necessary by estimates based on nuclear theory. Details of energy and angular dependence are given so that the data are complete for the purposes of neutronics calculations.
The concept of neutron strength functions and the experimental methods of measuring them are reviewed briefly. S-wave neutron strength functions, S (0), obtained from experimental data on neutron total cross sections at energies below 700 keV are presented in tabular form. Publications and private communications published between 1954 and July 1966 have been covered. Recommended values of S(0) are listed and plotted as a function of atomic weight. Theoretical predictions based on the nuclear optical model are also presented for purposes of comparison.
Nuclear cross sections for charged-particle-induced reactions of isotopes of C are presented in tabular and graphical form. This compilation includes experimental cross-section data available in the literature before January 1, 1964, for nuclear reactions of the type A(a, b)B at all energies, where Ma≧ one nucleon mass. Nuclear reactions involving mesons in the exit channel are not included. This collection supplements a previous compilation, Los Alamos Scientific Laboratory Report LA=2014 (see following page for bibliographic information). A large amount of the cross-section data is not presented either in tabular or graphical form in order to limit the size of the present compilation to a manageable one. A number of annotated bibliographies are included in the appendixes to provided a brief summary of these data.
Fast neutron cross sections for (n, p), (n, t), (n, α), (n, 2n), (n, np), and (n, nα) reactions, leading to all possible final states, are presented in graphic form. Neutron energies range up to 20 MeV. Targets include nuclei from H2 to U238. The compilation covers data available in June 1965.
Values are presented of the definite integral I(Z, Tmax), which is related to the relative number, N, of electrons in a β−-group with end point energy Tmax by the simple expression N = a2Tmax2I(Z, Tmax), where a is the y-intercept in the Fermi-Kurie plot,
where f is the Fermi function and
The Z-ranges is 10(1)109; the Tmax-range is 0.1(0.05)0.4, 0.5(0.1)5.2.
Brief description of comprehensive tables of Clebsch-Gordan, Racah, Wigner, and related coefficients are presented in the first section and, in the second, of tables of coefficients of Legendre polynomials in angular-distribution expressions. The present lists, which cover material available to us up to June 1966, supersede those in Section 3 of the 1958 Directory to Nuclear Data Tabulations1 and its supplements.2, 3 Bibliographies of some abridged tables and review articles in the same field are included in the third and fourth sections.
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