Radiation

News and Updates

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

Calibrating the Universe: Behind the Scenes, NIST Scientists Play a Critical Role in Improving Gravitational Wave Measurements

August 2, 2022

Space-time ripples, exploding stars, colliding black holes …. and the National Institute of Standards and Technology? NIST doesn’t exactly come to mind when

Out of the Shadows: New Imaging Method Reveals Concealed Objects

July 19, 2022

A new way of imaging concealed objects, devised by a researcher at the National Institute of Standards and Technology (NIST) and his colleagues, might take all

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

Basic Metrology (Archive): Blind Measurement Comparisons of the USA and UK Pb-210 National Standards

Completed

The National Institute of Standards and Technology (NIST), Radioactivity Group, and the National Physical Laboratory (NPL) of the UK, exchanged 210Pb solution

Comparisons: Key Comparison for Air-Kerma From Therapy Level and Radiation Protection Gamma-ray Beams

Completed

Comparisons for the national standards of air kerma from therapy level and radiation protection gamma-ray beams were conducted by the NIST and the Bureau

Publications

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

PLANAR METAMATERIAL ABSORBERS FOR CALIBRATION OF MICROWAVE RADIOMETERS FOR ATMOSPHERIC REMOTE SENSING

July 22, 2022

Author(s)

Omar Khatib, Dazhen Gu, Jonah Smith, William Deal, Willie Padilla, Steven Reising

In this work, we present metamaterial-based microwave absorbers fabricated on organic-based printed circuit boards as promising alternatives to traditional

National Voluntary Laboratory Accreditation Program (NVLAP) Homeland Security Applications: Radiation Detection Instruments

April 27, 2022

Author(s)

Bradley Moore, Leticia Pibida

NIST Handbook 150-23 presents the technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory

Models for an Ultraviolet-C Research and Development Consortium

March 25, 2022

Author(s)

Dianne L. Poster, C Cameron Miller, Yaw S. Obeng, John J. Kasianowicz, Michael T. Postek, Norman Horn, Troy Cowan, Richard Martinello

The development of an international, precompetitive, collaborative, ultraviolet (UV) research consortium is discussed as an opportunity to lay the groundwork

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

Star Light, Star Bright … But Exactly How Bright?

Calibrating the Universe: Behind the Scenes, NIST Scientists Play a Critical Role in Improving Gravitational Wave Measurements

Out of the Shadows: New Imaging Method Reveals Concealed Objects

Projects and Programs

Carrier Dynamics Measured by Ultrafast Time-Resolved Terahertz Spectroscopy

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

Basic Metrology (Archive): Blind Measurement Comparisons of the USA and UK Pb-210 National Standards

Comparisons: Key Comparison for Air-Kerma From Therapy Level and Radiation Protection Gamma-ray Beams

Publications

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

PLANAR METAMATERIAL ABSORBERS FOR CALIBRATION OF MICROWAVE RADIOMETERS FOR ATMOSPHERIC REMOTE SENSING

National Voluntary Laboratory Accreditation Program (NVLAP) Homeland Security Applications: Radiation Detection Instruments

Models for an Ultraviolet-C Research and Development Consortium

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