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Radiation Physics Portal

Programs and Projects
Lyman-Alpha Neutron Detector (LAND)

The well-known interaction of low-energy neutrons and 3 He produces a proton and a triton with 764 keV of kinetic energy shared between the two … more

ICE 62755 Standard N42 Data Format

The purpose of the IEC 62755 standard N42 data format is to facilitate manufacturer-independent transfer of information from radiation measurement … more

Photovoltaic Carrier Dynamics Measured by Time-Resolved Terahertz Spectroscopy

Far-infrared (or THz, 25 to 300 micron wavelength) femtosecond laser methods are employed to measure photovoltaic (PV) materials spectra and … more

Active Interrogation Standards

Active interrogation involves directing nuclear radiation into a closed container and measuring secondary radiations to gain information about the … more

Support of the Navy Dosimetry Program

The U.S. Navy uses thermoluminescent dosimeters (TLDs) to monitor personnel for radiation exposure. more

X-ray Detection with Large Area Avalanche Photodiodes for the Neutron Radiative Decay Experiment

Operation of the second neutron radiative decay experiment has been completed. In this experiment we observed the emission of photons that … more

Neutron Interferometer and Optics Facility (NIOF)

The Neutron Interferometry and Optics Facility (NIOF) located in the NIST Center for Neutron Research Guide Hall is one of the world's premier … more

Time-resolved infrared spectroscopy (TRIR)

Three independent femtosecond laser systems used for generating ultrafast pulses in the mid-IR (and far infrared:THz) through the UV; infrared … 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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