Why is thermal neutron with energy of 0.0253eV so important?

[benpaozhe]

I want to know the reason why the thermal neutrons with energy of 0.0253eV is so important. As far as I know, a neutron with an energy of 0.0253 eV is used as reference to measure nuclear cross sections such as absorption, fission, scattering, etc. And I want to know the details and more information about it. Thanks in advance.

 

[Simon Bridge]

That energy is really common - it it makes a handy reference.
It's also easy to detect.

http://thorea.wikia.com/wiki/Thermal,_Epithermal_and_Fast_Neutron_Spectra

 

[jtbell]

That (kinetic) energy corresponds to the most probable speed of thermal neutrons at room temperature (20°C).

http://holbert.faculty.asu.edu/eee562/ThermalNeutronFlux.pdf

 

[benpaozhe]

The thermal activation cross section of H-3,C14

That (kinetic) energy corresponds to the most probable speed of thermal neutrons at room temperature (20°C).

http://holbert.faculty.asu.edu/eee562/ThermalNeutronFlux.pdf

Thanks a lot.The file is helpful.

 

[benpaozhe]

thanks

That energy is really common - it it makes a handy reference.
It's also easy to detect.

http://thorea.wikia.com/wiki/Thermal,_Epithermal_and_Fast_Neutron_Spectra

Thank you, I appreciate it.