The Workshop on Signatures of Man-Made Isotope Production (WOSMIP)

The 8th Workshop on Signature of Man-Made Isotope Production (WOSMIP) will be held in Stockholm, Sweden on June 22-26, 2020. The workshop will be hosted by the Swedish Defence Research Agency (FOI) and supported by Pacific Northwest National Laboratory (PNNL).

Please note- Participants may need a visa to visit Sweden. Please see the Government of Sweden information on visas to determine if a visa is required for your participation at the WOSMIP workshop. If a visa is necessary, you may also use the link to start the application process. Please contact the organizers if you need a letter of invitation. 

Stockholm, Sweden


WOSMIP aims to support the Provisional Secretariat of the Preparatory Commission of the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) and unite experts from radioisotope and nuclear explosion monitoring communities for a 4-day friendly scientific meeting. This provides a unique forum for technical discussions and collaborations, to discuss the impact of radioisotopes released from civil and industrial sources on nuclear explosion monitoring in support of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). As with previous workshops, the focus of WOSMIP VIII will include issues associated with the radioisotopes released from nuclear power plants, research reactors, and medical and industrial isotope production. The radioxenon emission from these sources shall be examined to provide a better understanding of their contribution to the global radioxenon background. This is important because these peaceful uses of nuclear technology have a similar isotopic signature to nuclear explosions and are frequently observed by the International Monitoring System (IMS) of the CTBTO. Due to the strong participation of both communities at WOSMIP, significant progress has been made in identifying approaches to mitigate these effects on the IMS, whilst continuing to support efficient and reliable production of man-made isotopes.

For this collaboration to continue to be successful, it is critical we maintain support for WOSMIP VIII. This relies on increasing participation from both communities, and new participation is strongly encouraged.   

The WOSMIP VII report is now available. We look forward to you joining us at WOSMIP VIII. 

Last Updated: January 2020