Abstract
The neutron detectors discussed in the third chapter are not always suitable for determining the intensity of a stationary neutron field, but we can always use to advantage the so-called “radioactive indicators”, i.e., we can always activate a probe in the neutron field and then count its radioactivity. In this way, we can achieve very precise relative and absolute measurements of neutron intensities. Since there are many probe substances whose activation cross sections depend in various different ways on the neutron energy, we can also derive information about the energy distribution in a neutron field from probe measurements.
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Beckurts, K.H., Wirtz, K. (1964). Measurement of the Thermal Neutron Flux with Probes. In: Neutron Physics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-87614-1_11
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