Conveners
Gamma-ray spectrometry: 2 Oral and 10 Poster contributions
- Marie-Christine Lépy (CEA-LNE-LNHB)
- Octavian Sima (University of Bucharest & IFIN-HH Bucharest)
Gamma-ray spectrometry: 2 Oral contributions, ICRM WG meeting
- Octavian Sima (University of Bucharest & IFIN-HH Bucharest)
- Marie-Christine Lépy (CEA-LNE-LNHB)
Description
Gamma-ray spectrometry
The efficiency calibration of spectrometers is traditionally based on the measurement of radioactive sources calibrated in activity and whose emission intensities are known. However, in the energy range below 60 keV, there is a lack of reliable tabulated emission intensities and some inconsistencies have been highlighted [1]. Furthermore, if one aims to improve the measurement of emission...
Authors: 1. M.W. van Rooy (NMISA, South Africa), 2. M. Herranz (UPV/EHU, SPAIN),
3. R. Idoeta (UPV/EHU, SPAIN), 4. L. Verheyen (SCK CEN, Belgium), 5. M. Bruggeman (SCK CEN, Belgium), 6. M. Lepy (LNE-LNHB, France), 7. S. Pierre (LNE-LNHB, France), 8. P. Saganowski (NCNR RC POLATOM, Poland), 9. A. Luca (IFIN-HH, Romania)
Metrologically sound analyses of radioactivity of samples requires that...
Following a nuclear or radiological event, radiation protection authorities and other decision-makers need rapid and credible information about the affected areas based on reliable radiological data. However, the potentially large areas and risks to people in the vicinity pose difficult measurement challenges.
Therefore, European joint research project “Metrology for Mobile Detection of...
Neutron sources have been in use for quite some time, and the need for accurate account for nuclear material especially Plutonium and Uranium is necessary for IAEA safety and safeguards. Following recent events there has been special need to know how much Plutonium or Americium are present in old sources that are scattered around the world in the form of Pu-Be neutron sources. Isotopic content...
The computation of the FEP efficiency is widely used because the relative method of measurement has severe restrictions. The MC simulation of photon transport is the reference method of computing the FEP efficiency but it is rather complicate, time consuming and requires skilled people for determining optimal detector parameters.Hence, it is not convenient its use for many different source...
Monte Carlo (MC) simulation models implemented as computer codes are widely used for computing the full-energy peak (FEP) efficiency of gamma spectrometry (GS) systems. Their calibration is an important step in obtaining the traceability of GS measurements that employ computed values of the FEP efficiency. The input of MC models consist of model variables (e.g. photon energy) ...
In gamma-ray spectrometry the analysis of low-energy gamma-emitting nuclides like 210Pb, 129I needs special attention because the gamma attenuation in the sample depends on the specific element composition of the sample material. Hence, a material- or sample-specific self-attenuation correction is necessary. For that purpose, attenuation correction procedures have been developed in the past...
Authors: M.-C. Lépy 1, L. Chambon 1, B. Sabot 1, M. Anagnostakis 2, A. De Vismes 3, R. Galea 4, R. Idoeta 5, P. Jodlowski 6, K. Karfopoulos 7, A. Meyer 3, I. Mitsios 2, V. Peyres 8, P. Saganowski 9, N. Salpadimos 7, M.I. Savva 10, O. Sima 11, T.T. Thanh 12, R. Townson 4, Z. Tymiński 9, T. Vasilopoulou 10, L. Verheyen 13, T. Vidmar 13
Affiliations: 1: LNHB, 2: NTUA, 3: IRSN, 4: NRC, 5:...
The detection limit (DL) is the smallest value of the measurand which can be detected with a predefined probability. In terms of the indication, which is in gamma-ray spectrometry the number of counts in a peak occurring at an energy where the analyte radiates, the indication corresponding to the DL, np#, is the solution of the equation [1]
(np#- np)2=k1-β2[ur2(W)+u2(np= np#)] , ()
where...
Authors (affiliation): 1. Rita Plukienė (FTMC), 2. Elena Lagzdina (FTMC), 3. Darius Germanas (FTMC), 4. Kristina Mikalauskienė (FTMC), 5. Marina Konstantinova (FTMC), 6. Artūras Plukis (FTMC), 7. Arūnas Gudelis (FTMC), 8. Vidmantas Remeikis (FTMC)
One of important tasks for smooth and successful nuclear power plant (NPP) decommissioning process is optimization of nuclear facility metallic...
Authors (affiliation): Callum L. Grove (UKAEA, UK), Chantal R. Nobs (UKAEA, UK), Lee W. Packer (UKAEA, UK), Nicola Fonnesu (ENEA, Italy), Ewa Łaszyńska (IPPLM, Poland), Jerzy W. Mietelski (IFJ, Poland), Mario Pillon (ENEA, Italy), Marilia I. Savva (NCSRD, Greece), Ion E. Stamatelatos (NCSRD, Greece), Anthony Turner (UKAEA, UK), Theodora Vasilopoulou (NCSRD, Greece), Rosaria Villari (ENEA,...
Authors: Miroslav Hýža 1, Lenka Dragounová 1, Mahulena Kořistková 1
Affiliation: 1 National Radiation Protection Institute (NRPI), Czech Republic
For atmospheric radioactivity monitoring, the emphasis is on two conflicting requirements: sensitivity, and timeliness of reported results. This paper describes a sensitive method for quick screening measurements of aerosol filters, using a HPGe...
Authors: M.-C. Lépy 1, C. Thiam 1, M. Anagnostakis 2, C. Cosar 3, A. De Blas del Oyo 4, H. Dikmen 5, M.A. Duch 4, R. Galea 6, M.L. Ganea 3, M. Hult 7, S. Hurtado 8, K. Karfopoulos 9, A. Luca 3, G. Lutter 7, I. Mitsios 2, H. Persson 9, C. Potiriadis 10, S. Röttger 11, N. Salpadimos 10 M.I. Savva 12, O. Sima 3,13, T.T. Thanh 14, R. Townson 6, A. Vargas 4, T. Vasilopoulou 12, L. Verheyen 15, T....
Coincidence-summing effects play a significant role in present-day gamma ray spectrometry. The evaluation of the corresponding correction factors (FC) and of the associated uncertainties is an important issue for the Gamma-Ray Spectrometry Working Group (GSWG) of the ICRM, being the subject of several intercomparisons.
In this work the uncertainties and the covariance matrix of the FC...
The recent participation of IFIN-HH/Ionizing Radiation Metrology Laboratory (LMRI) to the CCRI(II)-K2.Cd-109 comparison allowed to test four different installations from LMRI, used to perform absolute and relative activity standardizations: LSC, 4πγ well type Ionization Chamber (IC), HPGe γ-ray spectrometry system and Si(Li) X-ray spectrometry system. The present paper refers to the three...
