Nv (neutron flux)
Encyclopedia
The symbol nv is commonly used to designate a flux
Neutron flux
The neutron flux is a quantity used in reactor physics corresponding to the total length travelled by all neutrons per unit time and volume . The neutron fluence is defined as the neutron flux integrated over a certain time period....

 of thermal neutrons equal to one thermal neutron
Neutron
The neutron is a subatomic hadron particle which has the symbol or , no net electric charge and a mass slightly larger than that of a proton. With the exception of hydrogen, nuclei of atoms consist of protons and neutrons, which are therefore collectively referred to as nucleons. The number of...

 per square centimeter per second
Second
The second is a unit of measurement of time, and is the International System of Units base unit of time. It may be measured using a clock....

. The symbol is used primarily to quantify the sensitivity of neutron detectors which are commonly described as having a sensitivity of so many counts per second per nv.
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