Projects/Programs

Displaying 1 - 25 of 126

Hydrogen Generation in Di-Iron Hydrogenase Mimics (Archived)

Discovery of novel materials to facilitate hydrogen gas production has prompted new avenues of research towards developing hydrogen as an alternative to fossil

PTIR combines the spatial resolution of AFM with the specificity of absorption spectroscopy

Nano-Chemical Imaging and -Spectroscopy (IR, nIR, VIS)

Conventional techniques for analyzing chemical composition, such as infrared (IR) microscopy often miss critically important nanoscale details. To overcome this

Advanced Materials: Elemental and Chemical Analysis of Microstructured Materials

Electron, ion and photon-based microanalysis methods, instrumentation and protocols are developed to advance measurement science towards the elemental and

Advanced Materials: X-ray Science for Standards and Analysis

Advanced experimental and theoretical methods are developed to increase the accuracy and precision of X-ray line energies and information derived from X-ray

Advanced Microscopy for Trace and Bulk Particle Characterization

Advanced microscopy and spectroscopy techniques are used in this project to study the chemical and physical properties of particles contained in complex

Applications of Quantum Information

Theory is being developed and used to devise methods for preserving and exploiting the quantum behavior of ever-larger systems for metrology, communication, and

Applied: Continuous Spin-Exchange Optical Pumping in High Flux Neutron Beams

We collaborated on tests at the Insitut Laue Langevin (ILL) to study the effects of high flux neutron beams on spin-exchange optical pumping (SEOP). The key

Applied: Methods in Neutron Detection and Spectroscopy

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

Applied: Pushing and Understanding the Limits of Spin-Exchange Optical Pumping of ³He

Neutron spin filters based on polarized 3He rely on the strong spin dependence of the absorption of neutrons by 3He gas.

Applied: Wide-Angle Neutron Polarization Analysis

The capabilities of many neutron scattering instruments would be greatly enhanced by neutron polarization analyzers that can cover a wide angular range.

Applied: X-ray Detection with Large Area Avalanche Photodiodes for the Neutron Radiative Decay Experiment

Operation of the second neutron radiative decay experiment was completed. In the experiment we observed the emission of photons that accompany neutron beta

Argon mini-arc meets its match: Use of a laser-driven plasma source in ultraviolet-detector calibrations

The National Institute of Standards and Technology operates two spectral comparator facilities, both of which are used to provide detector calibrations from the

Atomic Spectroscopy Data Center

Critical compilations of atomic energy levels, transition wavelengths, and transition probabilities. Online databases.

Atomic Wavefunctions

NIST scientists are actively developing new algorithms for extremely high-accuracy computation of non-relativistic eigenstates of few-electron atomic systems.

Autonomous Systems for Materials Research and Metrology: Accelerating Discovery and Democratizing Science

We are developing novel machine learning algorithms and incorporating them into closed-loop autonomous systems to accelerate knowledge capture in the lab and in

Basic Metrology: Advancing Triple-to-Double Coincidence Ratio Liquid Scintillation Counting

The triple-to-double coincidence ratio (TDCR) method of liquid scintillation (LS) counting employs three detectors to determine experimental counting

Basic Metrology: Alpha-Gamma Counting for High Accuracy Neutron Fluence Measurement

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

Basic Metrology: Applications of Diagnostic X-ray Spectrometers

The Dosimetry Group designs, fabricates, and calibrates bent-crystal optics and diagnostic spectrometers for customers around the world.

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

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

Basic Metrology (Archive): Primary Radioactivity Standardization of Ni-63

Ni-63 is of considerable interest and importance in radionuclidic metrology as well as for radiation protection surveillance around nuclear facilities.

Basic Metrology (Archive): Radon Binding to Water-Soluble Cryptophane

Collaboration on investigating the thermodynamics of radon binding with a new and novel class of cryptophane molecules was completed with researchers from the

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Basic Metrology: Design and Construction of a New Cs-137 Gamma-ray Calibration Facility

The construction of a new primary calibration facility for air kerma measurements has been completed. It delivers a collimated 137Cs gamma-ray beam in which

Basic Metrology: Fit-for-purpose liquid scintillators

Liquid scintillators have been at the heart of radiation measurements at NIST for decades. NIST scientists have pushed the limits of liquid scintillation-based

Basic Metrology: High-Dose Dosimetry Uncertainty Tables

The high-dose dosimetry program supports radiation-processing applications by assuring that the absorbed dose to the product, often prescribed or limited by

Basic Metrology: High-Resolution X-Ray Spectroscopy

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

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