Can some one explain, how to validate a neutron energy spectrum generated in a irradiation location of a research reactor ?
@Gyan Chandra Chauthwani ·
Thank you sir for your reply.
but what you said is about Fermi Chopper spectrometer, not for neutron energy spectrum validation.
I'm not an expert in this but in my opinion you should measure the spectrum with a neutron spectrometer having a traceable calibration (from NIST or other). This should confirm and validate the spectrum of your beam.
Most probably a Bonner sphere spectrometer would be the most suitable in this case, but there are also other option. Have a look, for instance, at www.bubbletech.ca
Since you are talking about high magnitude neutron fluxes I would consider using neutron activation with a series of foils. This is commonly done for research reactors. Please see the following links
http://www.physics.indiana.edu/~meyer1/p451f05/experiments/Neutron%20flux%20lab.pdf
http://www.me.utexas.edu/~ferreira/docs/J-Radioanal-Nucl-Chem.pdf
Can you better explain the meaning of "to validate a neutron energy spectrum"?
From the point of view of a user for irradiating devices and testing their rradiation resistance to neutrons, one needs to know the neutron spectral fluence. This is used to determine the so-called "hardness parameter" (typically for neutron with kinetic energy larger than 10 keV). The latter parameter allows one to convert the neutron fluence on an irradiated sample to a 1 MeV equivalent fluence (e.g. see Sects 4.1.3-4.1.3.2 in “Principles of Radiation Interaction in Matter and Detection” (3rd Edition)
www.worldscientific.com/worldscibooks/10.1142/8200).
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