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Physics

Radiation

News and Updates

KICS

Just for KICS!

Sensors capable of detecting individual photons of visible light have become essential for applications ranging from imaging faint galaxies to quantum computing

Projects and Programs

Dosimetry_ResearchandMetrology_PhotonAbsorbedDose_pic_Tosh

Photon Absorbed-Dose-to-Water Primary Standards

Ongoing
Modeling of accumulated-dose dependence in the heat defect of H2/O2 exhibits expected peak behavior in qualitative agreement with experiment, and is being further refined for purposes of reducing the associated relative uncertainty from its present value of 0.3 %. Studies to quantify the possible
Monte-Carlo simulation

Basic Metrology: Primary Standards for Radionuclides

Ongoing
As the National Metrology Institute (NMI) for the US, NIST is responsible for realizing the SI units. The derived SI unit for activity of a radionuclide is the becquerel, Bq. NIST has a proud history of contributing to the development of new and improved primary standardization methods for the Bq to

Publications

NIST Neutron Source Pre-Conceptual Design

Author(s)
David Diamond, Abdullah Weiss, Osman Celikten, Jeremy Cook, Dagistan Sahin, Hubert King, Anil Gurgen, Joy Shen
A pre-conceptual design has been completed for a NIST Neutron Source (NNS). It would replace the existing facility at the NIST Center for Neutron Research (NCNR

A bilateral comparison of 227Th activity standards between NPL and NIST

Author(s)
Andrew Fenwick, Denis Bergeron, Brittany Broder, Emma Bendall, Jeffrey Cessna, Sean Collins, Leticia Pibida, Natasha Ramirez, Elisa Napoli
The National Physical Laboratory (United Kingdom) and the National Institute of Standards and Technology (United States) each determined the massic activity and

Spectroscopic Measurements and Models of Energy Deposition in the Substrate of Quantum Circuits by Natural Ionizing Radiation

Author(s)
Joseph Fowler, Paul Szypryt, Raymond Bunker, Ellen Edwards, Ian Fogarty Florang, JIANSONG GAO, Shannon Hoogerheide, Ben Loer, Hans Mumm, Nathan Nakamura, John Orrell, Elizabeth M. Scott, Jason Stevens, Daniel Swetz, Brent VanDevender, Michael Vissers, Joel Ullom
Naturally occurring background radiation is a potential source of correlated decoherence events in superconducting qubits that will challenge error-correction

Tools and Instruments

Cryogenic detectors

Cryogenic Decay Energy Spectrometry

Cryogenic detectors provide some of the highest energy resolution spectra available, due to their intrinsic low thermal noise. The NIST cryogenic decay energy

Awards