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Answer to Question #1239 Submitted to "Ask the Experts"Category: Radiation Basics — Interaction Coefficients The following question was answered by an expert in the appropriate field: Q
What is the cross section of the reaction, 2H(gamma,neutron)1H?
A
The cross section is zero below the threshold of 2.225 MeV, after which it rises to a peak of about 2.4 mb = 2.4 X 10-27 cm2 at a photon energy of about 4.5 MeV. It decreases steadily thereafter, falling below 1 mb at 14 MeV. For a figure, see p. 335 in R. D. Evans, The Atomic Nucleus, Krieger Publ. Co., Malabar, FL (1985).
James Turner, PhD, CHP
Answer posted on 1 October 2001. The information and material posted on this Web site is intended as general reference information only. Specific facts and circumstances may alter the concepts and applications of materials and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice specific to whatever facts and circumstances are presented in any given situation. Answers are correct at the time they are posted on the Web site. Be advised that over time, some requirements could change, new data could be made available, or Internet links could change. For answers that have been posted for several months or longer, please check the current status of the posted information prior to using the responses for specific applications.
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