Chemistry Programs & Projects

 Precise knowledge of the fast neutron spectrum and fluence is essential for several experimental endeavors requiring the low-background … more

ANSI N42.35 requires 252 Cf neutron sources encapsulated in 1 cm of steel with a fluence of 2x10 4 n/s ±20%.  more

NIST continues to be deeply involved with measurements and evaluations of neutron cross section standards.   NIST maintains a limited … more

A common topic in energy systems is the need for in situ measurement of the mass transport of light ion species such as hydrogen or lithium. … more

Measuring the through-plane water content in a hydrogen fuel cell is critical to understanding this complicated heat and mass transport … more

Efficiently managing water transport in proton exchange membrane fuel cells (PEMFCs) is critical to the performance, cost, and durability in order … more

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

This program is a collaborative effort between NIST and NC State.   It is designed to measure the neutron beta-decay lifetime t n using a … more

NIST provides the national reference for the calibration of neutron radiation detectors and for neutron personnel dosimeters.  more

A new calibration service for 14 MeV neutron generators is being developed.   The calibrations may be done at NIST or at a customer site, … more

A new free-air ionization chamber has been built to eventually replace the Wyckoff-Attix chamber, which has been used at NIST as a primary x-ray … more

Spectrometry measurements in the x-ray calibration ranges have been undertaken using a high-resolution HPGe detector both in the direct beam and … more

Research is underway to expand the current range (20 Gy to 200 kGy) of alanine dosimetry to include therapy level dosimetry (as low as 1 Gy) for … more

A bilateral comparison was conducted between NIST and the International Atomic Energy Agency (IAEA) to support international efforts for … more

NIST has nearly five decades of experience in the development of critically evaluated, comprehensive databases of cross-section information for … more