National Standard for Neutrons

National Standard for Neutrons consists of:

• Irradiation devices, which generate neutron fields necessary for transferring the unit to lower-order standards and working measuring instruments. These include a set of radionuclide neutron sources based on ²⁴¹AmBe, ²⁵²Cf, and ²³⁹PuBe.
• Measuring and evaluation devices, including a multi-channel analyzer from Canberra, a Bonner sphere spectrometer consisting of eight polyethylene and three metallic spheres, and two ³He proportional detectors—specifically SP9 with pressures of 2 atm and 4 atm.
• Auxiliary equipment, such as a neutron irradiator, measuring bench, working platform, and various other devices.

Basic Metrological Properties:

Quantity	Symbol	Range	Combined Standard Uncertainty [%]
Ambient Dose Equivalent Rate	H˙n (10)	10 µSv/h to 1.5×10⁴ µSv/h	3-6
Personal Dose Equivalent Rate	H˙pn (10)	10 µSv/h to 1.5×10⁴ µSv/h	3-6
Fluence Rate	ψ*	2 cm⁻²s⁻¹ to 1000 cm⁻²s⁻¹	3-6

 

Documents for download

• Osvedčenie (certifikát) (pdf, 1.3 MB)