"A total of 1,830 neutron induced disintegrations in N14 have been studied by cloud chamber techniques. These events were observed with incident particles of energies ranging from one to forty-eight Mev. Out of the 23 reactions which were energetically conceivable, 12 have been confirmed and discussed in the present work. The apparatus and experimental procedure have been described and photographs of typical events included." --
Results of research toward measuring the neutron cross sections for nitrogen and oxygen in the neutron energy range from 4 to 12 Mev are presented. New techniques for the use of low-yield and multiple-group neutron source reactions, which were developed to perform these measurements, are shown, along with additional data obtained for the neutron source reactions Be-9 (alpha, n)C-12 and N-15 (d, n)O-16. In addition to the N-14(n, d sub O)C-13 reaction measurements, the C-13 (d, n)N-14 reaction was investigated to provide additional deuteron stripping data for evaluating the spins and parities of the lowlying states of N-14, and to provide additional information on the reaction mechanism for deuteron induced reactions. Measurements and results are given for the differential elastic, total, and nonelastic neutron cross sections for nitrogen and oxygen at several neutron energies. (Author).
In the late 1980s, the National Cancer Institute initiated an investigation of cancer risks in populations near 52 commercial nuclear power plants and 10 Department of Energy nuclear facilities (including research and nuclear weapons production facilities and one reprocessing plant) in the United States. The results of the NCI investigation were used a primary resource for communicating with the public about the cancer risks near the nuclear facilities. However, this study is now over 20 years old. The U.S. Nuclear Regulatory Commission requested that the National Academy of Sciences provide an updated assessment of cancer risks in populations near USNRC-licensed nuclear facilities that utilize or process uranium for the production of electricity. Analysis of Cancer Risks in Populations near Nuclear Facilities: Phase 1 focuses on identifying scientifically sound approaches for carrying out an assessment of cancer risks associated with living near a nuclear facility, judgments about the strengths and weaknesses of various statistical power, ability to assess potential confounding factors, possible biases, and required effort. The results from this Phase 1 study will be used to inform the design of cancer risk assessment, which will be carried out in Phase 2. This report is beneficial for the general public, communities near nuclear facilities, stakeholders, healthcare providers, policy makers, state and local officials, community leaders, and the media.
