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Physics Programs & Projects

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Advanced Linear and Nonlinear Optical Properties of Materials
Last Updated Date: 08/06/2015

High-accuracy linear and nonlinear optical properties of materials used for leading-edge optical technologies are measured and characterized to … more

Comparison of ANSI N42.46 and IEC 62523 Standards for Cargo and Vehicle Screening
Last Updated Date: 08/06/2015

We are undertaking a comparison of the relative performance of ANSI N42.46 and IEC 62523 consensus standards for x-ray cargo and vehicle … more

Measurement of the Parity Non-Conserving Neutron Spin Rotation in Liquid Helium
Last Updated Date: 08/06/2015

The Standard Model has been remarkably successful in describing weak interactions between leptons, leptons and hadrons, and in flavor-changing … more

Methods in Neutron Detection and Spectroscopy
Last Updated Date: 08/06/2015

We continue to work improving techniques in fast neutron detection using segmented spectrometers based on the principle of capture-gating. Our … more

Precision Measurement of the Neutron-He3 Incoherent Scattering Length
Last Updated Date: 08/06/2015

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

Measurement of the Neutron Magnetic Dipole Moment Using Schwinger Scattering
Last Updated Date: 08/06/2015

This experiment will measure the neutron interaction with an atomic field (also known as Schwinger scattering) inside a silicon crystal in order … more

Neutron Interferometry with Polarized Neutrons as an Additional Degree of Freedom
Last Updated Date: 08/06/2015

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

Use of Quantum Error Coding in a 4-Blade Neutron Interferometer
Last Updated Date: 08/06/2015

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

High-Resolution Atomic Spectroscopy
Last Updated Date: 08/04/2015

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

Designing the Nanoworld: Nanostructures, Nanodevices, and Nanooptics
Last Updated Date: 08/04/2015

Nano and atomic scale theory of the electronic, optical and mechanical properties of ultrasmall structures, such as semiconductor quantum dots and … more

Development of Epoxy Based Ge-68 Standard Phantom Sources
Last Updated Date: 08/04/2015

The use of imaging data for staging of disease, treatment planning, and monitoring of patient response continues to increase. In these types of … more

FPGA-based Triple-to-Double Coincidence Ratio Liquid Scintillation Counting
Last Updated Date: 08/04/2015

The triple-to-double coincidence ratio (TDCR) method of liquid scintillation counting employs three detectors to facilitate the experimental … more

Standards for Clinical Radionuclide Calibrators
Last Updated Date: 08/04/2015

NIST maintains a collection of dose calibrators and develops and reports on secondary activity standards for imaging and therapeutic nuclides.

Micelle Effects in Liquid Scintillation Counting
Last Updated Date: 08/04/2015

Liquid scintillation counting (LSC) techniques underlie many of the primary activity measurements at NIST and other national metrology institutes. … more

High-Resolution X-ray Spectroscopy
Last Updated Date: 08/04/2015

We are pursuing a program of x-ray spectroscopy of highly-charged ions and plasmas using custom-designed and constructed curved crystal … more

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