Radiation

News and Updates

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‘Exceptional’ Research: Unexpected Light Behavior May Be Harnessed to Improve Optical Communications and Sensors

April 21, 2022

Shine a flashlight into murky pond water and the beam won’t penetrate very far. Absorption and scattering rapidly diminishes the intensity of the light beam

A man in a white lab coat and black face mask (Jeffrey Herrera) stands near a wall of protective equipment like long gloves.

Spotlight: Jeffrey Herrera’s Journey Into Science and Safety

October 4, 2021

Jeffrey Herrera is one of NIST’s health physicists, ensuring our ability to safely use radioactive materials for research and supporting radiation safety

Detecting mid-infrared light, one photon at a time

June 1, 2021

For some 30 years, scientists have used superconducting materials to record the tiniest specks of light imaginable — individual photons, or single particles of

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

Electron and Photon Absrobed-Dose-to-Water

Calibrations: Water Calorimetry Primary Standards for Absorbed Dose to Water

Ongoing

Absorbed dose is the energy imparted per unit mass by radiation to an irradiated target. The SI unit of absorbed dose is the gray (abbreviated Gy), equivalent

Calibrations: Ionization Chambers as Secondary Standards for Activity of Radionuclides

Ongoing

Precise calibration of short-lived radioactive material is essential for nuclear medicine and power plant applications. To deliver such calibrations on-demand

Publications

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

Calorimetry in Computed Tomography Beams

March 10, 2022

Author(s)

Huaiyu H. Chen-Mayer, Ronald Tosh, Fred B. Bateman, Paul Bergstrom, Brian E. Zimmerman

A portable calorimeter for direct realization of absorbed dose in medical computed tomography (CT) procedures was constructed and tested in a positron emission

Realization and dissemination of activity standards for medically important alpha-emitting radionuclides

March 4, 2022

Author(s)

Denis E. Bergeron, Karsten Kossert, Sean Collins, Andrew Fenwick

Interest in targeted cancer therapy with alpha-emitting radionuclides is growing. To evaluate emerging radiotherapeutic agents requires precise activity

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

‘Exceptional’ Research: Unexpected Light Behavior May Be Harnessed to Improve Optical Communications and Sensors

Spotlight: Jeffrey Herrera’s Journey Into Science and Safety

Detecting mid-infrared light, one photon at a time

Projects and Programs

Carrier Dynamics Measured by Ultrafast Time-Resolved Terahertz Spectroscopy

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

Calibrations: Water Calorimetry Primary Standards for Absorbed Dose to Water

Calibrations: Ionization Chambers as Secondary Standards for Activity of Radionuclides

Publications

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

Models for an Ultraviolet-C Research and Development Consortium

Calorimetry in Computed Tomography Beams

Realization and dissemination of activity standards for medically important alpha-emitting radionuclides

Tools and Instruments

Time-resolved infrared spectroscopy (TRIR)

Beamline 2: Absolute Source-Based Radiometry

Radiopharmaceutical Standardization Laboratory

Neutron Interferometry and Optics Facilities

Awards

R&D 100 Award - PhotoForce Project