Radiation

News and Updates

The Big Quantum Chill: NIST Scientists Modify Common Lab Refrigerator to Cool Faster With Less Energy

April 23, 2024

By modifying a refrigerator commonly used in both research and industry, researchers at the National Institute of Standards and Technology (NIST) have

Bullseye! NIST Devises a Method to Accurately Center Quantum Dots Within Photonic Chips

March 18, 2024

Devices that capture the brilliant light from millions of quantum dots, including chip-scale lasers and optical amplifiers, have made the transition from

Microwave Detectors and Multiplexing: NIST Researchers Help Astronomers Examine the Early Universe

January 24, 2024

Perched atop a high plateau in Chile’s Atacama Desert, a long-awaited observatory is beginning to take shape: the largest suite of ground-based telescopes

Projects and Programs

Carrier Dynamics Measured by Ultrafast Time-Resolved Terahertz Spectroscopy

Ongoing

Non-contact far-infrared (or THz, 25 to 300 micron wavelength) femtosecond laser methods are employed to measure 2D, bulk semiconductors, photovoltaic (PV)

Ultrafast Molecular Switch Dynamics Examined by Mid-Infrared Femtosecond Spectroscopy (Archived)

Completed

Ultrashort mid-infrared laser pulses are used to observe fast molecular and photochemical reaction processes occurring in the condensed phase. We have developed

Imaging: Toward a Neutron Microscope

Ongoing

A novel neutron lens based on reflection has recently been developed that could greatly benefit neutron imaging and other neutron scattering techniques.

Fundamental Physics: Search for Time Reversal Violation in Polarized Neutron Decay (emiT)

Completed

The "emiT" experiment searched for time-reversal symmetry violation term in neutron beta decay. It did so by measuring electron-proton coincidence events from

Publications

Activity standard and calibrations for 227Th with ingrowing progeny

April 20, 2024

Author(s)

Denis E. Bergeron, Jeffrey T. Cessna, Brittany Broder, Leticia Pibida, Ryan P. Fitzgerald, Morgan DiGiorgio, Elisa Napoli, Brian E. Zimmerman

Thorium-227 was separated from its progeny and standardized for activity by the triple-to-double coincidence ratio (TDCR) method of liquid scintillation

Efficient Synthesis and HPLC-Based Characterization for Developing Vanadium-48-Labeled Vanadyl Acetylacetonate as a Novel Cancer Radiotracer for PET Imaging

February 9, 2024

Author(s)

Brittany Broder, Mohammed Bhuiyan, Richard Freifelder, David Rotsch, Satish Chitneni, Marvin William Makinen, Chin-Tu Chen

Bis(acetylacetonato)oxidovanadium(IV) [(VO(acac)2], generally known as vanadyl acetylacetonate, has been shown to be preferentially sequestered in malignant

Nanoscale X-ray Tomography of Integrated Circuits using a Hybrid Electron/X-ray Microscope: Results and Prospects

November 20, 2023

Author(s)

Nathan Nakamura, Paul Szypryt, Joseph Fowler, Zachary H. Levine, Daniel Swetz

Accurate characterization of subsurface features in integrated circuits (ICs) is essential for defect detection, quality assurance, and supply chain security

Comparison of Calibration coefficients for Vinten Ionization Chamber Simulated Using Four Monte Carlo Methods

October 17, 2023

Author(s)

Brittany Broder, Denis E. Bergeron, Ryan P. Fitzgerald, Brian E. Zimmerman

The Vinten 671 ionization chamber (VIC) was modelled using four Monte Carlo (MC) programs: EGS++, EGSnrc, Penelope, and TOPAS. VICs with well-characterized

Tools and Instruments

Synchrotron Ultraviolet Radiation Facility SURF III

Awards

Brian Simonds, Kyle Rogers, Ivan Ryger, Joshua Hadler, Paul Williams, Alexandra Artusio-Glimpse, John Lehman, Nathan Tomlin, and Ari Feldman

R&D 100 Award - PhotoForce Project

For the development of a Radiation Pressure Power Meter that enables extremely high continuous laser powers to be measured as the force

Radiation

News and Updates

The Big Quantum Chill: NIST Scientists Modify Common Lab Refrigerator to Cool Faster With Less Energy

Bullseye! NIST Devises a Method to Accurately Center Quantum Dots Within Photonic Chips

Microwave Detectors and Multiplexing: NIST Researchers Help Astronomers Examine the Early Universe

Projects and Programs

Carrier Dynamics Measured by Ultrafast Time-Resolved Terahertz Spectroscopy

Ultrafast Molecular Switch Dynamics Examined by Mid-Infrared Femtosecond Spectroscopy (Archived)

Imaging: Toward a Neutron Microscope

Fundamental Physics: Search for Time Reversal Violation in Polarized Neutron Decay (emiT)

Publications

Activity standard and calibrations for 227Th with ingrowing progeny

Efficient Synthesis and HPLC-Based Characterization for Developing Vanadium-48-Labeled Vanadyl Acetylacetonate as a Novel Cancer Radiotracer for PET Imaging

Nanoscale X-ray Tomography of Integrated Circuits using a Hybrid Electron/X-ray Microscope: Results and Prospects

Comparison of Calibration coefficients for Vinten Ionization Chamber Simulated Using Four Monte Carlo Methods

Tools and Instruments

Synchrotron Ultraviolet Radiation Facility SURF III

The Parallel Beam Diffractometer (PBD) Laboratory

Neutron Interferometry and Optics Facilities

Time-resolved infrared spectroscopy (TRIR)

Awards

R&D 100 Award - PhotoForce Project