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Math Programs & Projects

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Cell Measurements
Last Updated Date: 07/02/2015

This is the summary for cell measurements.

Radioactivity Standard Reference Material Program
Last Updated Date: 07/01/2015

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

Precision Measurement of the Branching Ratio and Energy Spectrum of Radiative Neutron Decay
Last Updated Date: 07/01/2015

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

Californium Neutron Irradiation Facility
Last Updated Date: 07/01/2015

NIST maintains the Californium Neutron Irradiation Facility (CNIF), which is an exposure facility providing fast neutrons for irradiations … more

Optical and Microwave Waveform Synthesis
Last Updated Date: 06/24/2015

We use femtosecond-laser frequency combs to generate optical and microwave waveforms with unprecedented noise performance.     more

Testing of Radiation Detection Systems
Last Updated Date: 06/22/2015

NIST is working together with the Department of Homeland Security (DHS) Domestic Nuclear Detection Office (DNDO) in testing radiation detection … more

NIST-on-a-Chip in the ADI Group
Last Updated Date: 06/17/2015

We are developing core technology tools to enable chip-scale standards that realize a broad range of base and derived SI units in compact, … more

X-ray Detection with Large Area Avalanche Photodiodes for the Neutron Radiative Decay Experiment
Last Updated Date: 06/12/2015

Operation of the second neutron radiative decay experiment has been completed. In this experiment we observed the emission of photons that … more

Active Interrogation Standards
Last Updated Date: 06/12/2015

Active interrogation involves directing nuclear radiation into a closed container and measuring secondary radiations to gain information about the … more

Pushing and Understanding the Limits of Spin-Exchange Optical Pumping of He-3
Last Updated Date: 06/12/2015

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

Calcium Optical Beam Clock
Last Updated Date: 06/08/2015

A simple, compact alternative to the highest performing optical standards, the Ca clock uses a thermal beam of neutral atoms with one or two … more

Optical Cavities for Laser Stabilization
Last Updated Date: 06/08/2015

Optical cavities are essential elements of optical atomic clocks, as they serve to pre-stabilize the clock laser. Our Group is currently … more

Frequency Comb Spectroscopy
Last Updated Date: 06/08/2015

We use optical frequency combs to perform precision spectroscopy in the visible and, more recently, mid-infrared, domains, for rapid, high … more

Microresonator Device Research
Last Updated Date: 06/08/2015

With micro-resonators (fabricated in house or by collaborators) we are developing microcombs, integrated reference cavities and low-noise laser … more

Frequency Comb Calibration of Astronomical Spectrographs
Last Updated Date: 06/08/2015

We have constructed portable frequency combs that have provided in situ calibration of astronomical spectrographs, to aid in the search for … more

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