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Search Publications

NIST Authors in Bold

Displaying 10876 - 10900 of 73893

Validation of Single Particle ICP-MS for Routine Measurements of Nanoparticle Size and Number Size Distribution

November 25, 2018
Author(s)
Antonio R. Montoro Bustos, Premsagar P. Kavuri, Antonio M. Possolo, Natalia Farkas, Andras Vladar, Karen E. Murphy, Michael R. Winchester
Single particle inductively coupled plasma-mass spectrometry (spICP-MS) is an emerging technique capable of measuring nanoparticle size and number concentration simultaneously, of metal-containing nanoparticles (NPs) at environmentally relevant levels

Approximating vibronic spectroscopy with imperfect quantum optics

November 23, 2018
Author(s)
W.R. Clements, Jelmer Renema, Andreas Eckstein, Antonio A. Valido, Adriana Lita, Thomas Gerrits, Sae Woo Nam, Steven Kolthammer, Joonsuk Huh
We study the impact of experimental imperfections on a recently proposed protocol for performing quantum simulations of vibronic spectroscopy. Specifically, we propose a method for quantifying the impact of these imperfections, optimizing an experiment to

Recommended electron-impact excitation and ionization cross sections for Be I

November 23, 2018
Author(s)
FNU Dipti, Tapasi Das, klaus Bartschat, I Bray, D Fursa, O Zatsarinny, C Ballance, H-K Chung, Yuri Ralchenko
Analytic fits to the recommended electron-impact excitation and ionization cross sections for Be I are presented. The lowest 19 terms of configurations 2snl (n 4) and 2p2 terms below the first ionization limit are considered. The fits are based on the

Determining Carbon Fiber Composite Loading by Flip-Chip on a Coplanar Waveguide to 110GHz

November 22, 2018
Author(s)
Nina P. Basta, Jasper A. Drisko, Aaron M. Hagerstrom, Joshua A. Orlicki, Jennifer M. Sietins, Daniel B. Knorr, Jr., Edward J. Garboczi, Christian J. Long, Nathan D. Orloff
The electrical properties of materials are a necessary part of any circuit design. As applications at millimeter-wave frequen-cies increase, there is a growing need to develop new materials with low loss and multiple functionalities. Unfortunately, many

Thermodynamic analysis of the topologically close packed ? phase in the Co-Cr system

November 22, 2018
Author(s)
Peisheng Wang, Matthew C. Peters, Ursula R. Kattner, Kamal Choudhary, Gregory B. Olson
Density functional theory (DFT) calculations show that a thermodynamic description considering the magnetic contribution to the total energy for the end-members of the σ phase is necessary. A more straightforward method to use the DFT results in a CALPHAD

An energy-resolved atomic scanning probe

November 21, 2018
Author(s)
Daniel S. Gruss, Chih-Chun Chien, Julio T. Barreiro, Massimiliano Di Ventra, Michael P. Zwolak
The density of states is a concept that is ubiquitous in classical and quantum physics, since it quantifies the energy distribution of states available in a system. Spectroscopic means allow its measurement over the entirety of a system's energy spectrum

Quantum Process Fidelity Bounds from Sets of Input States

November 21, 2018
Author(s)
Emanuel H. Knill, Karl H. Mayer
We investigate the problem of bounding the quantum process fidelity given bounds on the fidelities between target states and the action of a process on a set of pure input states. We formulate the problem as a semidefinite program and prove convexity of

Observation of bound state self-interaction in a nano-eV atom collider

November 20, 2018
Author(s)
R Thomas, M. Chilcott, A. Deb, Eite Tiesinga, N. Kjaergaard
Quantum mechanical scattering resonances for colliding particles occur when a continuum scattering state couples to a discrete bound state between them. The coupling also causes the bound state to interact with itself via the continuum and leads to a shift

Utilizing confocal laser scanning microscopy for rapid optical characterization of graphene

November 20, 2018
Author(s)
Vishal Panchal, Yanfei Yang, Guangjun Cheng, Jiuning Hu, Mattias Kruskopf, Chieh-I Liu, Albert Rigosi, Christos Melios, Angela R. Hight Walker, David B. Newell, Olga Kazakova, Randolph Elmquist
Confocal laser scanning microscopy (CLSM) is a non-destructive, highly-efficient optical characterization method for large-area analysis of graphene on different substrates, which can be applied in ambient air, does not require additional sample

Categorical Models for Process Planning

November 19, 2018
Author(s)
Spencer J. Breiner, Eswaran Subrahmanian, Albert W. Jones
Process plans provide a structure for 1) identifying the tasks involved in a given process, 2) the resources needed to accomplish them, and 3) a variety of relationships and constraints between these. This information guides important operational decisions

CYCLE_D: NIST Vapor Compression Cycle Design Program, Version 6.0; User's Guide

November 19, 2018
Author(s)
Piotr A. Domanski, J S. Brown, Eric W. Lemmon
The CYCLE_D package simulates vapor compression refrigeration cycles that use pure refrigerants or blends of refrigerants. The model can simulate a basic subcritical or transcritical refrigeration cycle, both with or without a liquid-line/suction-line heat

Gain Calibration of Current-to-Voltage Converters

November 19, 2018
Author(s)
Thomas C. Larason, Carl C. Miller
Current-to-voltage converters are used in many photometric and radiometric applications. The calibration of current- to-voltage converters at a few input currents is not always sufficient to understand the linearity and the bias of a device. Many devices

Health Assessment Measurements Quality Assurance Program: Exercise 1 Final Report

November 19, 2018
Author(s)
Chuck Barber, Bruce A. Benner Jr., Jeanice M. Brown Thomas, Carolyn Burdette, Johanna Camara, Stephen E. Long, Jacolin Murray, Melissa M. Phillips, Benjamin Place, Kate Rimmer, Laura J. Wood, Susan Tai, Siva K. Chinthalapati, Lee L. Yu
The NIST Health Assessment Measurements Quality Assurance Program (HAMQAP) was launched in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS) in 2017. HAMQAP was established to enable laboratories to improve the

NIST Handbook 150-8, NVLAP Acoustical Testing Services

November 19, 2018
Author(s)
Kari K. Harper
NIST Handbook 150-8 presents technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Acoustical Testing Services program. It is intended for information and use by

AC stark shifts of dark resonances probed with Ramsey spectroscopy

November 16, 2018
Author(s)
James Wesley Y. Pollock, V. I. Yudin, Moshe Shuker, M. Y. Basalaev, A. V. Taichenachev, Xiaochi Liu, John E. Kitching, Elizabeth A. Donley
The off-resonant AC Stark shift for coherent population trapping (CPT) resonances probed with Ramsey spectroscopy is investigated experimentally and theoretically. Measurements with laser- cooled 87Rb atoms show excellent quantitative agreement with a

Spin relaxation of a donor electron coupled to interface states

November 16, 2018
Author(s)
Peihao Huang, Garnett W. Bryant
An electron spin qubit in a silicon donor atom is a promising candidate for quantum information processing because of its long coherence time. To be sensed with a single-electron transistor, the donor atom is usually located near an interface, where the
Displaying 10876 - 10900 of 73893
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