纠缠,缠绕
发表于 2025-3-30 09:02:15
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情节剧
发表于 2025-3-30 16:13:54
Slowing-Down Parameters region. By far the most important of these experiments are the stationary ones for determining the mean squared slowing-down distance (Sec. 16.1) since this quantity enters directly into reactor calculations. In addition, comparison of measured and calculated mean squared slowing-down distances all
integral
发表于 2025-3-30 18:21:07
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公猪
发表于 2025-3-30 23:05:24
Investigation of the Diffusion, Absorption, and Thermalization of Neutrons by Non-Stationary Methodsr and more accurate measurements than stationary methods and because they also give much deeper insight into the physical nature of the problems. This conclusion is especially true for the method of pulsed sources, whose great potentialities were first recognized by von Dardel and which has since be
预感
发表于 2025-3-31 01:32:46
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Intentional
发表于 2025-3-31 07:34:35
Measurement of Cross Sectionser, average values in a well-defined spectrum (Maxwellian spectrum of thermal neutrons, 1/.spectrum, fission spectrum) are measured. In later chapters, various . methods for determining cross sections which are based on the interaction of a substance with a neutron field will be discussed in detail.
抛物线
发表于 2025-3-31 09:11:20
Neutron Fieldsium with the thermal motion of their surroundings. Their energies then assume, or at least approximate, a thermal distribution. Neutrons with such an energy distribution are called “thermal neutrons”.
深陷
发表于 2025-3-31 14:03:07
Applications of Elementary Diffusion Theoryy are well fulfilled ; as long as we stay one or two mean free paths away from boundaries and sources, the results of diffusion theory will be quite accurate. We specifically assume that the neutron sources emit neutrons with a thermal energy distribution.
Notify
发表于 2025-3-31 21:11:22
Thermalization of Neutronsl. In doing so, we shall strive to connect the theory of the thermalization process with the theory of the slowing-down process that was previously developed for energies greater than about 1 ev on the basis of collisions with free, stationary nuclei.