World Metrology Day is an annual celebration of the signature of the Metre Convention on 20 May 1875 by representatives of seventeen nations.

Metrology, the science of measurement, plays a central role in scientific discovery and innovation, industrial manufacturing and international trade, in improving the quality of life and in protecting the global environment.

The theme for World Metrology Day 2026 is: Metrology: Building Trust in Policy Making.

A video message from the Director of the BIPM was recorded for this event.

More information on World Metrology Day website.

Within the framework of the SCINTI+ project (Scintillation Characterization and INtegration for improved Ionizing-radiation metrology), coordinated by B. Sabot and funded by LNE and CEA, this initiative marks the launch of a structured effort to collect, standardize and disseminate reference data on scintillator properties. It represents a first step towards the creation of an open and easily usable library for the community, aimed at facilitating the comparison, selection and use of scintillators for radiation metrology. Further developments will be presented in the near future, in particular around the Compton-TDCR method, which opens promising perspectives for scintillator characterization and application.

The International Initiative on Fundamental Parameters (IIFP) was launched by the LNHB and the PTB to address the need for reliable data to characterise the interactions of X-rays with matter. These data, or “fundamental atomic parameters”, are of paramount importance for the interpretation of X-ray fluorescence-based analytical techniques, in order to provide reliable quantitative results. The fields of applications are many and varied, ranging from fundamental physics to the characterisation of innovative materials at the nanoscale, as well as environment and cultural heritage.

Within this framework, different experiments and theoretical calculations have been carried out through the combined efforts of several national metrology institutes, university laboratories and industrial companies to determine new atomic parameters. These results are expected to benefit a wide community of users.

Meetings are held regularly to review progress and foster collaboration between partners.

More information: http://www.lnhb.fr/home/conferences-publications/iifp_wg/

The LNHB coordinates the European metrology project on radon, RadonNET (23IND07). In compliance with Directive 2013/59/Euratom, member states are required to mitigate ²²²Rn activity concentration in public and private buildings, where levels regularly exceed the reference threshold of 300 Bq·m⁻³. Authorities are mandated to implement mitigation strategies that adhere to basic safety standards, ensuring the protection of citizens from ionising radiation exposure caused by ²²²Rn progenies.

This project addresses the challenge of quantifying ²²²Rn activity concentrations indoors, particularly in large buildings designed for future cities, with an emphasis on connected, low-energy consumption structures. The development of methods and sensors for detecting radon activity concentrations, along with the creation of a quality-assured sensor network, will enhance on-site ²²²Rn metrology and provide essential support to the European radiation protection industry.

• Link to RadonNet website: http://radon-network.eu/
• Link to EURAMET webpage: https://www.euramet.org/research-innovation/search-research-projects/details/project/radon-metrology-sensor-networks-for-large-buildings-and-future-cities

 

The Laboratoire National Henri Becquerel is pleased to have organised the 24th International Conference on Radionuclide Metrology and its Applications in Paris, on 19-23 May 2025.

 

World Metrology Day is an annual celebration of the signature of the Metre Convention on 20 May 1875 by representatives of seventeen nations.

Metrology, the science of measurement, plays a central role in scientific discovery and innovation, industrial manufacturing and international trade, in improving the quality of life and in protecting the global environment.

The theme for World Metrology Day 2022 is: Metrology in the Digital Era. This theme was chosen because digital technology is revolutionizing our community, and is one of the most exciting trends in society today.

More information on World Metrology Day website.