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Search Publications

NIST Authors in Bold

Displaying 51 - 75 of 73697

Speciation of cesium in a radiocesium-bearing microparticle emitted from Unit 1 during the Fukushima nuclear accident by XANES spectroscopy using transition edge sensor

September 5, 2025
Author(s)
Yoshio Takahashi, Shinya Yamada, Hikaru Miura, Yuichi Kurihara, Oki Sekizawa, Kiyofumi Nitta, Tadashi Hashimoto, Masato Tanaka, Minako Kurisu, Shinji Okada, Takaaki Itai, Hiroki Suga, Teruhiko Kashiwabara, Kohei Sakata, Hideyuki Tatsuno, Ryota Hayakawa, Hirotaka Suda, Takaya Ohashi, Yoshitaka Ishisaki, Takuma Okumura, Yuto Ichinohe, Tasuku Hayashi, Yuki Imai, Hirofumi Noda, Toru Tamagawa, Tadaaki Isobe, Toshiyuki Azuma, William Doriese, Joel Ullom, Daniel Swetz, Malcolm Durkin, Galen O'Neil, Satoshi Kohjiro, Shogo Higaki, Daisuke Tsumune, Masayoshi Yamamoto, Tomoya Uruga
The chemical state of radiocesium (RCs) was determined using X-ray absorption near-edge structure (XANES) in fluorescence mode and microbeam X-ray fluorescence (μ-XRF) mapping for the cesium (Cs) incorporated in a radiocesium-bearing silica microparticle

Dietary Supplement Laboratory Quality Assurance Program: Exercise 3 Final Report

September 4, 2025
Author(s)
Jenna Klingsick, Hugh Hayes, Elena Wood
The National Institute of Standards and Technology (NIST) Dietary Supplement Laboratory Quality Assurance Program (DSQAP) was launched in 2007 as a collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS). The DSQAP

Topology and Kinetic Pathways of Colloidosome Assembly and Disassembly

September 4, 2025
Author(s)
Raymond Adkins, Joanna Robaszewski, Seungwoo Shin, Fridtjof Brauns, Leroy Jia, Ayantika Khanra, Prerna Sharma, Robert Pelcovits, Thomas Powers, Zvonimir Dogic
Liquid shells, such as lipid vesicles, emulsions, and soap bubbles, are ubiquitous throughout biology, engineered matter, and everyday life. Their creation or disintegration is defined by a singularity separating topologically distinct one-boundary

Metrological Near-Room-Temperature Photon-Number-Resolving Detector: a Design Study

September 3, 2025
Author(s)
Zachary Levine, Joshua Bienfang, Alan Migdall, Neil Zimmerman
We describe and model a non-cryogenic optical detector designed to count incident photons with metrological accuracy. Our design consists of a semiconductor device operating at −10 °C and is predicted to resolve pulses of up to 10 photons with an error

Multi-Factor Authentication for Criminal Justice Information Systems: Implementation Considerations for Protecting Criminal Justice Information

September 3, 2025
Author(s)
William Fisher, Jason Ajmo, Sudhindra Umarji, Spike Dog, Mark Russell, Karen Scarfone
Most recent cybersecurity breaches have involved compromised credentials. Migrating from single-factor to multi-factor authentication (MFA) reduces the risk of compromised credentials and unauthorized access. Both criminal and noncriminal justice agencies

Quantitative Analysis of the Crystallinity of CoFeB Layers in Magnetic Random-Access Memory (MRAM) Stacks Using Extended X-ray Absorption Fine Structure Spectroscopy

September 3, 2025
Author(s)
Bruce Ravel, Matthias Gottwald, Christian Lavoie, Jean Jordan-Sweet, Steve Brown, Guohan Hu
Using Extended X-ray Absorption Fine Structure spectroscopy (EXAFS), we demonstrate a quantitative method to evaluate the degree of crystallization of thin CoFeB-based structures used in Spin Transfer Torque Magnetic Random-Access Memory (STT-MRAM). This

Multi-facility comparison of InGaAs trap detector responsivity for optical fiber power

September 1, 2025
Author(s)
Kyle Rogers, Jeanne Houston, Zeus Ruiz Gutierrez, Matthew Spidell, Padraic Aither, Marty Gould, John Lehman
The absolute responsivity of an optical detector in a trap configuration has been investigated in the interest of high-accuracy fiber-coupled measurements for commercial optical fiber power meters and fiber-coupled single-photon detector calibrations. The

Assessing support structures for early career researchers at NIST

August 29, 2025
Author(s)
Justyna Zwolak, Robert Dalka
This report summarizes the findings of the workforce preparation assessment initiative at the National Institute of Standards and Technology (NIST) using the Aspects of Postdoctoral Researcher Experience Scale survey. It provides an assessment of the

Accurate, precise pressure sensing with tethered optomechanics

August 28, 2025
Author(s)
Olivia Green, Yiliang Bao, John R. Lawall, Jason Gorman, Daniel Barker
We show that optomechanical pressure sensors with characterized density and thickness can achieve uncertainty as low as 1.1 % via comparison with a secondary pressure standard. The agreement between the secondary standard and our optomechanical sensors is

Methodology for Characterizing Network Behavior of Internet of Things Devices

August 28, 2025
Author(s)
Paul Watrobski, Murugiah Souppaya, Joshua Klosterman, William C. Barker, Jeffrey Marron, Blaine Mulugeta
This report describes an approach to capturing and documenting the network communication behavior of Internet of Things (IoT) devices. From this information, manufacturers, network administrators, and others can create and use files based on the

Material Needs and Measurement Challenges for Advanced Semiconductor Packaging: Understanding the Soft Side of Science

August 27, 2025
Author(s)
Ran Tao, Polette Centellas, Stian Romberg, Anthony Kotula, Gale Holmes, Amanda Forster, Christopher Soles, Bob Allen, Edvin Cetegen, William Chen, Jeff Gotro, Mark Poliks
This perspective builds upon insights from the National Institute of Standards and Technology (NIST)-organized workshop, "Materials and Metrology Needs for Advanced Semiconductor Packaging Strategies," held at the 35th annual Electronics Packaging

Materials discovery in combinatorial and high-throughput synthesis and processing: A new Frontier for SPM

August 27, 2025
Author(s)
Boris Slautin, Yungtao Liu, Kamyar Barakati, Yu Liu, Reece Emery, Seungbum Hong, Astita Dubey, Vladimir Shvartsman, Doru Lupascu, Sheryl Sanchez, Mahshid Ahmadi, Yunseok Kim, Evgheni Strelcov, Keith Brown, Philip Rack, Sergei Kalinin
For over three decades, scanning probe microscopy (SPM) has been a key method for exploring material structures and functionalities at nanometer and often atomic scales in ambient, liquid, and vacuum environments. Historically, SPM applications have

Rayleigh-Taylor instability in a binary quantum fluid

August 27, 2025
Author(s)
Ian Spielman, Gretchen Campbell, Stephen Eckel, Yanda Geng, Junheng Tao, Mingshu Zhao, Shouvik Mukherjee
We experimentally investigated the Rayleigh-Taylor instability in an immiscible homogeneous Bose-Einstein condensate (BEC) in different spin states. A magnetic field gradient force pushes two BECs together and induces instability of the interface, leading

Certification of 3180 Series Standard Reference Materials(R) Anions in Solution

August 26, 2025
Author(s)
Brian Lang, Thomas Vetter, John Molloy, Antonio Possolo
The 3180 series Standard Reference Materials (SRMs) are single anion solutions intended for use as primary calibration standards for the quantitative determination of a single anion and are a key link in the traceability chain for analysis measurements of

GRANAD - Simulating GRAphene nanoflakes with ADatoms

August 26, 2025
Author(s)
David Dams, Miriam Kosik, Marvin Muller, Abhishek Ghosh, Antton Babaze, Julia Szczuczko, Garnett Bryant, Andres Ayuela, Carsten Rockstuhl, Marta Pelc, Karolina Slowik
GRANAD is a new program based on the tight-binding approximation to simulate optoelectronic properties of graphene nanoflakes and Su–Schrieffer–Heeger (SSH) chains with possible adatom defects under electromagnetic illumination. Its core feature is the

Direct detection of the ? 8.4 eV internal conversion energy of 229mTh embedded in a superconducting nanowire

August 25, 2025
Author(s)
Galen O'Neil, Kjeld Beeks, Eric Hudson, David Ray Leibrandt, Marion Mallweger, Sae Woo Nam, Sayan Patra, Gil Porat, Dileep Venkatarama Reddy, Thorsten Schumm, Stephen Schoun, Benedict Seiferle, Christian Schneider, Lars von der Wense, Peter Thirolf, Varun Verma, Jun Ye, Chuankun Zhang
We report on a direct measurement of the ∼ 8.4 eV nuclear excitation energy of the isomeric first excited state 229mTh via the internal conversion (IC) decay channel. Thermalized and mass-filtered recoiling 229mTh ions from 233U α decay are delivered to
Displaying 51 - 75 of 73697
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