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Physics Programs & Projects

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Accelerator Facilities
Last Updated Date: 10/09/2014

The Radiation Physics Division's accelerator facilities continue to support a broad range of research efforts in the areas of industrial and … more

Radioactivity Standard Reference Material Program
Last Updated Date: 10/09/2014

The Standard Reference Materials Program of the National Institute of Standards and Technology (NIST) provides science, industry, and government … more

Newtonian constant of gravitation international consortium
Last Updated Date: 10/07/2014

The Newtonian constant of gravitation G is one of the most fundamental constants of classical physics. Recent measurements of G are in … more

Femtosecond Laser Frequency Combs for Optical Clocks
Last Updated Date: 08/14/2014

We develop self-referenced mode-locked femtosecond lasers that function as the "gears" of optical clocks. The femtosecond laser clockwork is … more

Yb Lattice Clock
Last Updated Date: 08/08/2014

Our Group is developing high stability, high accuracy optical atomic clocks based on thousands of Yb atoms confined to an optical lattice. Such … more

Neutron Interferometry with Polarized Neutrons as an Additional Degree of Freedom
Last Updated Date: 07/15/2014

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

Photovoltaic Carrier Dynamics Measured by Time-Resolved Terahertz Spectroscopy
Last Updated Date: 07/11/2014

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

In Situ Measurement Techniques
Last Updated Date: 07/01/2014

Synthetic cell membrane constructs allow the simplification and complete control of a more complicated cellular system, as well as the … more

CODATA values of the fundamental constants
Last Updated Date: 04/29/2014

Every four years, the Committee on Data for Science and Technology (CODATA) issues recommended values of the fundamental physical constants. The … more

Quantum Physics Theory
Last Updated Date: 04/29/2014

Theoretical work relevant to the determination of values of the fundamental constants, tests of bound-state quantum electrodynamics (QED), and … more

International System of Units (SI)
Last Updated Date: 04/29/2014

The International System of Units (SI) provides definitions of units of measurement that are widely accepted in science and technology and which … more

Terahertz Bi-Directional Reflection Function Measurements for Homeland Security
Last Updated Date: 04/09/2014

Far-infrared (Terahertz or THz, 25 to 300 micron wavelength) femtosecond laser methods are employed to generate high power broadband pulses for … more

Test and Evaluation Protocols for ANSI/IEEE N42 Standards
Last Updated Date: 03/25/2014

The purpose of these test and evaluation protocols is to provide additional information to the published ANSI/IEEE N42 series for homeland … more

Single Photonics and Quantum Information
Last Updated Date: 03/24/2014

Quantum-based communication and measurement systems that use novel quantum states of light are being developed around the world. However, the … more

Optoelectrical Characterization of Nanostructured Photovoltaic Materials and Devices
Last Updated Date: 03/24/2014

Photovoltaics technology is usually categorized into three generations: 1) devices based on polysilicon; 2) devices based on thin-film direct … more

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