Development of methods for the preparation of radiopure Se-82 sources for the SuperNEMO neutrinoless double-beta decay experiment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422152" target="_blank" >RIV/00216208:11320/20:10422152 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21340/20:00336833 RIV/68407700:21670/20:00336833

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=sHprwSEFIU" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=sHprwSEFIU</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/ract-2019-3129" target="_blank" >10.1515/ract-2019-3129</a>

Result language

angličtina

Original language name

Development of methods for the preparation of radiopure Se-82 sources for the SuperNEMO neutrinoless double-beta decay experiment

Original language description

A radiochemical method for producing Se-82 sources with an ultra-low level of contamination of natural radionuclides (K-40, decay products of Th-232 and U-238) has been developed based on cation-exchange chromatographic purification with reverse removal of impurities. It includes chromatographic separation (purification), reduction, conditioning (which includes decantation, centrifugation, washing, grinding, and drying), and 82 Se foil production. The conditioning stage, during which highly dispersed elemental selenium is obtained by the reduction of purified selenious acid (H2SeO3) with sulfur dioxide (SO2) represents the crucial step in the preparation of radiopure Se-82 samples. The natural selenium (600 g) was first produced in this procedure in order to refine the method. The technique developed was then used to produce 2.5 kg of radiopure enriched selenium (Se-82). The produced Se-82 samples were wrapped in polyethylene (12 mu m thick) and radionuclides present in the sample were analyzed with the BiPo-3 detector. The radiopurity of the plastic materials (chromatographic column material and polypropylene chemical vessels), which were used at all stages, was determined by instrumental neutron activation analysis. The radiopurity of the Se-82 foils was checked by measurements with the BiPo-3 spectrometer, which confirmed the high purity of the final product. The measured contamination level for Tl-208 was 8-54 mu Bq/kg, and for Bi-214 the detection limit of 600 mu Bq/kg has been reached.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10303 - Particles and field physics

Project

<a href="/en/project/EF16_013%2F0001733" target="_blank" >EF16_013/0001733: Underground laboratory LSM - Czech participation to European-level research</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Radiochimica Acta

ISSN

0033-8230

e-ISSN

—

Volume of the periodical

108

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

11

Pages from-to

87-97

UT code for WoS article

000509475600001

EID of the result in the Scopus database

2-s2.0-85067975593