Radiation

News and Updates

Superconducting Nanowire Single-Photon Detector

Unveiling the Universe: In 4 New Studies, NIST Explores Novel Ways to Hunt Dark Matter

December 8, 2022

For decades, astronomers and physicists have been trying to solve one of the deepest mysteries about the cosmos: An estimated 85% of its mass is missing.

Research on the Rocks: Combining Neutrons and X-Ray Imaging, NIST Scientists Study Meteorites to Explore the Mystery of How Earth Acquired Its Water

November 3, 2022

Each year, hundreds of meteorites — rocky bodies left over from the formation of the solar system — bombard Earth, delivering minerals, metals and water to our

Star Light, Star Bright … But Exactly How Bright?

September 22, 2022

A picture may be worth a thousand words, but for astronomers, simply recording images of stars and galaxies isn’t enough. To measure the true size and absolute

Projects and Programs

Carrier Dynamics Measured by Ultrafast Time-Resolved Terahertz Spectroscopy

Ongoing

Non-contact far-infrared (or THz, 25 to 300 micron wavelength) femtosecond laser methods are employed to measure 2D, bulk semiconductors, photovoltaic (PV)

Ultrafast Molecular Switch Dynamics Examined by Mid-Infrared Femtosecond Spectroscopy (Archived)

Completed

Ultrashort mid-infrared laser pulses are used to observe fast molecular and photochemical reaction processes occurring in the condensed phase. We have developed

Imaging: Neutron Imaging of Lithium and Alkaline Batteries

Completed

A common topic in energy systems is the need for in situ measurement of the mass transport of light ion species such as hydrogen or lithium. Neutron imaging has

Fundamental Physics: Neutron Lifetime Measurement Using a Cold Neutron Beam

Ongoing

Neutron beta-decay is the process in which a neutron is transformed into a proton, electron, and electron antineutrino. This process is well described in the

Publications

Highlights of Neutronics Analyses for the Pre-conceptual NIST Neutron Source Design

November 13, 2022

Author(s)

Osman Celikten, Dagistan Sahin, Abdullah Weiss

Primary standardization of 212Pb activity by liquid scintillation counting

September 22, 2022

Author(s)

Denis E. Bergeron, Jeffrey T. Cessna, Ryan P. Fitzgerald, Lizbeth Laureano-Perez, Leticia Pibida, Brian E. Zimmerman

An activity standard for 212Pb in equilibrium with its progeny was realized, based on triple-to-double coincidence ratio (TDCR) liquid scintillation (LS)

Coordinated Neutron and X-ray Computed Tomography of Meteorites: Detection and Distribution of Hydrogen-Bearing Materials

August 29, 2022

Author(s)

Allan Treiman, Jacob LaManna, Isabella DeClue, Daniel S. Hussey, Lawrence Anovitz

The presence and distribution of hydrogen-bearing materials in meteorites are important constraints on processes in the early solar system, and the delivery of

Electron Paramagnetic Resonance Study of Carbonated Hydroxyapatite Synthesized through Calcium Phosphate Cements

August 5, 2022

Author(s)

Alline F. Myers, Shozo Takagi, Stanislav Frukhtbeyn, Laurence Chow, Veronika Szalai, Lonnie Cumberland, Ileana Pazos, Eaman Karim

Ionizing radiation-induced paramagnetic defects in calcified tissues like tooth enamel are indicators of irradiation dose. Hydroxyapatite (HA), the principal

Tools and Instruments

Awards

Brian Simonds, Kyle Rogers, Ivan Ryger, Joshua Hadler, Paul Williams, Alexandra Artusio-Glimpse, John Lehman, Nathan Tomlin, and Ari Feldman

R&D 100 Award - PhotoForce Project

For the development of a Radiation Pressure Power Meter that enables extremely high continuous laser powers to be measured as the force

Radiation

News and Updates

Unveiling the Universe: In 4 New Studies, NIST Explores Novel Ways to Hunt Dark Matter

Research on the Rocks: Combining Neutrons and X-Ray Imaging, NIST Scientists Study Meteorites to Explore the Mystery of How Earth Acquired Its Water

Star Light, Star Bright … But Exactly How Bright?

Projects and Programs

Carrier Dynamics Measured by Ultrafast Time-Resolved Terahertz Spectroscopy

Ultrafast Molecular Switch Dynamics Examined by Mid-Infrared Femtosecond Spectroscopy (Archived)

Imaging: Neutron Imaging of Lithium and Alkaline Batteries

Fundamental Physics: Neutron Lifetime Measurement Using a Cold Neutron Beam

Publications

Highlights of Neutronics Analyses for the Pre-conceptual NIST Neutron Source Design

Primary standardization of 212Pb activity by liquid scintillation counting

Coordinated Neutron and X-ray Computed Tomography of Meteorites: Detection and Distribution of Hydrogen-Bearing Materials

Electron Paramagnetic Resonance Study of Carbonated Hydroxyapatite Synthesized through Calcium Phosphate Cements

Tools and Instruments

Neutron Interferometry and Optics Facilities

Time-resolved infrared spectroscopy (TRIR)

Beamline 2: Absolute Source-Based Radiometry

Radiopharmaceutical Standardization Laboratory

Awards

R&D 100 Award - PhotoForce Project