Result: Direct measurement of alpha emission probabilities in the decay of $^{226}$Ra

Title:
Direct measurement of alpha emission probabilities in the decay of $^{226}$Ra
Authors:
Marouli, M., Pommé, S., van Ammel, R., García-Toraño, E., Crespo, T., Pierre, Sylvie
Contributors:
European Commission - Joint Research Centre [Geel] (JRC), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Laboratoire National Henri Becquerel (CEA, LIST) (LNHB (CEA, LIST)), Département Métrologie Instrumentation & Information (CEA, LIST) (DM2I (CEA, LIST)), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, European Project: IND57,MetroNORM
Source:
Applied Radiation and Isotopes. 125:196-202
Publisher Information:
CCSD; Elsevier, 2017.
Publication Year:
2017
Collection:
collection:CEA
collection:DRT
collection:CEA-UPSAY
collection:UNIV-PARIS-SACLAY
collection:CEA-UPSAY-SACLAY
collection:LIST
collection:DM2I
collection:GS-COMPUTER-SCIENCE
collection:GS-SPORT-HUMAN-MOVEMENT
collection:DIN
Subject Terms:
radioactivity, ionizing radiation, Alpha spectrometry, $^{226}$Ra, Decay data measurement, Alpha-particle emission probabilities, alpha-rays, spectrometry, alpha spectrometry, electrodeposition, radioactive source, spectrum analysis, alpha spectrum, source preparation, signal processing, deconvolution algorithm, conversion electron, deflection, coincidental detection, emission probabilities, interlaboratory comparison, [PHYS.NEXP]Physics [physics], Nuclear Experiment [nucl-ex]
Original Identifier:
HAL:
Document Type:
Journal article<br />Journal articles
Language:
English
ISSN:
0969-8043
1872-9800
Relation:
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apradiso.2017.04.029; info:eu-repo/grantAgreement//IND57/EU/Metrology for processing materials with high natural radioactivity/MetroNORM
DOI:
10.1016/j.apradiso.2017.04.029
Access URL:
https://cea.hal.science/cea-04550224
https://cea.hal.science/cea-04550224v1/document
https://cea.hal.science/cea-04550224v1/file/article_MMarouli_projet%20MetroNORM.pdf
Rights:
info:eu-repo/semantics/OpenAccess
Accession Number:
edshal.cea.04550224v1
Database:
HAL

Further Information

High-resolution alpha-particle spectrometry was performed to determine the main alpha-particle emission probabilities in the decay of $^{226}$Ra. Thin, homogeneous sources were prepared by electrodeposition on stainless steel disks. Alpha spectra with an energy resolution of 20 keV were obtained in three laboratories and analysed with different deconvolution algorithms. In two set-ups, a magnet system was used to deflect conversion electrons to avoid their coincidental detection with the alpha particles. Spectra taken at close range without a magnet system yielded biased results which cannot be fully compensated by statistical corrections for coincidence summing. The derived emission probabilities of the three main alpha decays are 94.07 (1)%, 5.93 (1)%, and 0.0059 (15)%, respectively. They are in excellent agreement with calculated values derived from the P(γ+ce) decay scheme balance, which solves the existing discrepancy problem with two previous direct measurements published in literature.