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Physics Programs & Projects

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Quantum Sensors
Last Updated Date: 07/29/2015

The Quantum Sensors Project develops sensors based on quantum phenomena for spectroscopy, imaging, and other precision measurements for … more

Electron-Beam Irradiation of Solar Cells
Last Updated Date: 07/29/2015

The Dosimetry Group operates a system capable of performing electron beam processing, which consists of a Van de Graaff electron accelerator and a … more

Alpha-gamma Counting for High Accuracy Fluence Measurement
Last Updated Date: 07/28/2015

The Alpha-Gamma device is a totally-absorbing neutron detector that has been used to measure the absolute neutron fluence of a cold, monoenergetic … more

CODATA values of the fundamental constants
Last Updated Date: 07/28/2015

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

Spectral irradiance and radiance responsivity calibrations using uniform sources (SIRCUS)
Last Updated Date: 07/27/2015

SIRCUS is a reference facility for the calibration of detectors and radiometers for spectral irradiance responsivity and spectral radiance … more

New Manganese Sulfate Bath
Last Updated Date: 07/27/2015

Many neutron sources required by Homeland Security have a lower neutron emission rate than is appropriate for the NIST calibration facility, a … more

Fabry-Perot Displacement Interferometry
Last Updated Date: 07/27/2015

High-resolution Fabry-Perot interferometry is being developed and employed for demanding applications in mechanical displacement metrology.

Micro- and nano-optomechanical systems
Last Updated Date: 07/27/2015

Light can interact with mechanical systems in interesting and useful ways, not only probing the mechanical motion with spectacular sensitivity, … more

Precision Measurement of the Neutron-He3 Incoherent Scattering Length
Last Updated Date: 07/27/2015

The Neutron Interferometer and Optics Facility performed a precision measurement of the n- 3 He incoherent scattering length using a polarized 3 … more

Use of Quantum Error Coding in a 4-Blade Neutron Interferometer
Last Updated Date: 07/27/2015

We have designed a new type of neutron interferometer, which will be less sensitive to slow vibrations.

Neutron Interferometry with Polarized Neutrons as an Additional Degree of Freedom
Last Updated Date: 07/27/2015

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

Infrared optical properties of materials and components
Last Updated Date: 07/27/2015

Accurate measurements of the optical properties of materials in the infrared spectral range play an increasingly important role in the aerospace … more

Frequency Conversion Interfaces for Photonic Quantum Systems
Last Updated Date: 07/24/2015

Optical frequency conversion, in which the color of light is changed, is a process that has numerous applications in physics and technology. For … more

High-Resolution Atomic Spectroscopy
Last Updated Date: 07/23/2015

Accurate measurements of atomic wavelengths, energy levels, oscillator strengths and isotope and hyperfine structure using diffraction grating … more

Precision Measurement of the Branching Ratio and Energy Spectrum of Radiative Neutron Decay
Last Updated Date: 07/21/2015

Neutron beta-decay is typically considered as a three-body process, but it is always accompanied by inner-bremsstrahlung soft photons, n → e − + p … more

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