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Figure 2
The neutron energy spectra of the RANS pulsed neutron beam at 1.4 and 5.0 m away from moderator surface, simulated by the PHITS code (Sato et al., 2013BB41), expressed in neutrons per second per cm2 per lethargy at the RANS full-powder averaged current of 100 µA. The moderator thickness is 4.0 cm, and the neutron lethargy (i.e. logarithmic energy decrement) u = ln(E0/E) is a dimensionless logarithm of the ratio of the energy of source neutrons to the energy of product neutrons after a collision.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 53| Part 2| April 2020| Pages 444-454
https://doi.org/10.1107/S1600576720002551
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