GammaRayX 2021

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GammaRayX 2021 Webinar

Welcome to the GammaRayX Webinar page of the GammaWiki web. Here you will find information on the upcoming GammaRayX Webinar on gamma spectrometry that will be held 20.-21.10.2021.

The GammaRayX activity involves a webinar covering various aspects of gamma-ray spectrometry. The Roman numeral X in the acronym refers to the tenth event in the series of well-known gamma-ray spectrometry seminars. The scope of the webinar will be broad allowing a range of topics to be considered. For example, the following areas could be included (but are not limited to these):

Laboratory, in-situ and mobile measurements
Whole body measurements
Uncertainty calculations
Efficiency determination
Spectrum analysis and data management
Monte Carlo simulations
Nuclear forensics
Novel/new approaches

International experts have been invited to give presentations on different aspects and new developments in gamma-ray spectrometry. Participants are encouraged to give presentations on subjects of their choice, describing their applications of gamma-ray spectrometry and possible challenges encountered, new developments in detectors, electronics and data analysis. We strongly invite attendees to give “spontaneous” short presentations (5-10 min) on their work. Participation of students and young scientists is highly welcome.

Overview and background

This work is supported by the Nordic Nuclear Safety Research (NKS). GammaWiki is a resource webpage for Nordic users of gamma spectrometry. GammaWiki is a product of the NKS GammaSpec 2016 activity, which is an independent continuation of the GammaUser (2014), GammaTest (2013), GammaWorkshop (2011-2012), and GammaSem (2009) activities.

A page with links to individual information pages for previous workshops can be accessed here.


Please complete and send the completed Registration Form to Raisa Tiililä ( by 8 October 2021. Please see details in the form.


Here is a link to the GammaRay X Webinar Programme

Webinar arrangement and agenda

The webinar will be organized by STUK using MS Teams. Further instructions and webinar link will be sent to the registered participants in due time.

We sincerely hope to see you all there.

Webinar cost

No webinar fee will be charged.

Webinar presentations and material

GammaRay X Webinar Programme (Final)
Opening and practical info


Aleksandr Jermolajev: Radioactive characterization of radioactive waste and clearance of radioactive waste from regulatory control at IgnalinaNPP.pdf
Alexander Mauring: Estimating measurement uncertainties when the traditional GUM approach fails
Anna Banel and Thomas Bandur Aleksandersen: How IFE contributes to handle challenges associated with LSA waste and contamination
Antti Kallio: Measurements supporting NORM-regulation in Finland
Dieter Pauwels: Aegis Field Measurements
Eric Dorval: An overview of gammaspectrometry activities at VTT
Harri Toivonen: Simulation of radiation in-field operations for training, exercises and capability testing
Henrik Ramebäck: Recent work on detection limits in gamma ray spectrometry
Henrik Ramebäck: Interlaboratory comparison (ILC) on simulated air filter + discussion
Hussam Badran: Non-destructive sample analysis using coincidence technique with the upgraded PANDA device
Jani Turunen: Radical improvements to STUK's laboratory analysis capability
Joonas Tikkanen: Measurement of X-ray machine spectra with an HPGe
Julia Puputti: Callio Lab - multidisciplinary underground research centre
Leen Verheyen: GSP liquid nitrogen filling system in the gamma ray spectroscopy lab
Marc Breidenbach: Optimizing the detector model to improve the overall quality for efficiency transfer calculations
Marie-Christine Lépy: Focus on measurements and corrective factors of low-energy X- and gamma-rays
Mark Dowdall: A Wide Spectrum NKS Gamma Spectrometry Activities Over Two Decades
Mark Dowdall: NKS RINFOR Improvement of National Nuclear Forensics Gamma Spectrometric Core Capabilities
Mats Eriksson: On the use of PCA in gamma spectrometry
Matti Kalliokoski: Gamma-ray imaging with a GeGi device
Nicola Markovic: Source homogeneity assumption in object gamma spectrometry
Riina Virta: Passive gamma emission tomography (PGET) for verifying spent nuclear fuel
Roy Pollanen: Efficiency Calibration Renewal
Sakari Ihantola: Novel Detector for Finnish Early Warning Network
Satu Rautio: Gamma measurements at Loviisa Power Plant
Sigurdur Palsson: Using first responder gamma spectrometric software for teaching and emergency response
Sven P. Nielsen: Update on gamma spectormetry at DTU Riso
Timo Hilden: New multi-detector coincidence devices at STUK
Tim Vidmar: Validation of EFFTRAN for TCS corrections

The Organizers

  • Roy Pöllänen (STUK)
  • Jani Turunen (STUK)
  • Henrik Ramebäck (FOI)
  • Sven Nielsen (DTU)
  • Anna Banel (IFE)
  • Thomas Bandur Aleksandersen (IFE)
  • Kjartan Guðnason (IRSA)