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Chemical Process and Nuclear Measurements Group

Welcome

The Chemical Process and Nuclear Measurements Group performs systematic assessment and validation of chemical kinetics information available in the open literature. Plays an active role in national and international organizations for the preparation of databases for simulations in relevant areas. Carries out simulations and experimental studies on global and molecular phenomenon using fundamental data. Develops and uses state-of-the-art measurement techniques as well as theoretical calculations to determine: (a) the rate constants, mechanisms, and transport properties of chemical reactions in the gas and liquid phases and at surfaces, with emphasis on species important to the climate and environmental sciences, the chemical and related industries, and relevant to processes such as combustion, alternative fuels, and plasma chemistry, (b) The properties of individual molecules and the characterization of the potential energy surfaces of reactions of materials undergoing chemical change with the focus on their use in simulations of global phenomena, and (c) the thermochemical and thermal properties of industrially and environmentally important chemical species; develops advanced measurement methodologies for detecting and characterizing a wide range of reactive intermediates; and certifies Standard Reference Materials for thermochemical properties of importance to industry and science.

Additionally, the group develops, models, and applies laser methods to advance measurement sciences in emerging areas of nanoscale technologies, spectroscopic monitoring, and characterization of industrial processes and products. Develops experimental methods, theoretical and numerical models, and reference standards pertaining to the use of scattering and absorption spectroscopies in electronic device and sensor fabrication, chemical manufacturing processes, and analytic services; develops spectroscopic methods and disseminates reference data for measuring trace gas concentration in manufacturing processes and in telluric environments; performs experimental and numerical studies to elucidate the mechanisms of thermal reactive processes and aerosol growth and formation, and performs experiments to link electronic and structural properties of molecular aggregates and films to device and sensor performance.

Finally, our group conducts basic and applied research on the science that underpins the identification and quantification of elements and inorganic compounds using nuclear methods, such as instrumental, radiochemical, prompt gamma, and delayed neutron activation analyses. The group maintains facilities and expertise for analysis at ultra-trace concentrations; applies these techniques to maintain and develop Standard Reference Materials and other measurement services, including those related to clinical and food analyses; assist external users in making measurements at the NIST Center for Neutron Research utilizing the Prompt Gamma Activation Analysis and Neutron Depth Profiling user facilities; provides advice and measurement services to industry, other government agencies (federal and state), and other scientific organizations. We interact with standards development organizations and other National Metrology Institutes to establish comparability of measurement capabilities.

Programs/Projects

Measurement Quality in Hydrogen Storage R&D—No existing hydrogen storage material satisfies the Department of Energy (DoE) goal of achieving a commercial hydrogen storage system for competitive hydrogen-powered transportation. Accelerating …

Real Fuels—This programs is aimed at determining the fundamental chemical and physical properties of the large organic compounds in fuels related to their combustion. Such information are necessary inputs for …

Determinations of Boron Deposit Quality by Neutron Depth Profiling—Straw detectors are a new concept in position-sensitive neutron detectors recently developed by Proportion Technology Inc. The detectors are especially valuable in large-area imaging applications …

Advanced Materials Characterization—The Chemical Sciences Division supports the characterization of new, diverse, and technological critical materials. The constant evolution of material science and technology challenge existing …

Instrument Standards for Detection of Hazardous Chemical Vapors—The overarching goal of this project is to develop and disseminate measurement tools to improve the accuracy and reliability of chemical measurements related to homeland security, e.g. measurements …

Spectroscopic Measurements of Atmospheric Gases for Monitoring Greenhouse Gases—Climate scientists are developing a new generation of spectrometers for the NASA-sponsored inventory of atmospheric greenhouse gases, most notably carbon dioxide. This inventory is critical to …

Plasma Process Metrology—Our multifaceted program provides numerous outputs to assist our customers. First, we develop and evaluate a variety of measurement techniques that provide industry and academia with methods to …

Gas and Particulate Concentration Measurements and Standards—The objective is to develop and demonstrate accurate and robust measurement approaches that will establish optical absorption line intensities intrinsic to the species of interest as gas …

Advanced IC Interconnects - Process Metrology and Models—The objective for Advanced IC Interconnects is to provide measurement standards and advanced measurement methods supporting metrology needs of the semiconductor industry. Also to develop in situ …

 
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Contact

Pamela Chu (Group Leader)
phone: (301) 975-2988
fax: (301) 869-4020

100 Bureau Drive, M/S 8320
Gaithersburg, MD 20899-8320