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Radiation Physics Portal

Programs and Projects
Alpha-gamma Counting for High Accuracy Fluence Measurement

The Alpha-Gamma device is a totally-absorbing neutron detector that has been used to measure the absolute neutron fluence of a cold, monoenergetic … more

New Manganese Sulfate Bath

Many neutron sources required by Homeland Security have a lower neutron emission rate than is appropriate for the NIST calibration facility, a … more

Precision Measurement of the Neutron-He3 Incoherent Scattering Length

The Neutron Interferometer and Optics Facility performed a precision measurement of the n- 3 He incoherent scattering length using a polarized 3 … more

Use of Quantum Error Coding in a 4-Blade Neutron Interferometer

We have designed a new type of neutron interferometer, which will be less sensitive to slow vibrations. more

Neutron Interferometry with Polarized Neutrons as an Additional Degree of Freedom

Our goal is to apply Quantum Information Processing techniques to improve neutron interferometry contrast by making our final measurement … more

Neutron Source Strength Calibrations

The neutron source calibration facility operated by NIST is a world-class calibration laboratory providing neutron source calibration services for … more

Medical-Industrial Radiation Facility

The Medical-Industrial Radiation Facility (MIRF) located in the  Radiation Physics Division  of the NIST  Physical Measurement Laboratory is a … more

Radiopharmaceutical Standardization Laboratory

Radioactivity measurements for diagnostic and therapeutic nuclear medicine in the United States are based on measurements at NIST. Activity … more

Beamline 2: Spectrometer Calibrations

Absolute irradiance calibrations based on the calculability of synchrotron radiation are performed on beamline 2. See GOES-R/EXIS and SDO as … more

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