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Experimental investigation of the 9.2 and 24.3 keV nuclear transitions in Th-227
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SYSNO ASEP 0547313 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Experimental investigation of the 9.2 and 24.3 keV nuclear transitions in Th-227 Author(s) Kovalík, Alojz (UJF-V) RID, ORCID, SAI
Inoyatov, A. K. (UZ)
Perevoshchikov, L. L. (RU)
Ryšavý, Miloš (UJF-V) RID, ORCID, SAI
Filosofov, D. V. (RU)
Dadakhanov, J. A. (RU)Number of authors 6 Article number 285 Source Title European Physical Journal A. - : Springer - ISSN 1434-6001
Roč. 57, č. 10 (2021)Number of pages 10 s. Publication form Print - P Language eng - English Country US - United States Keywords Th-227 ; Ac-227 ; electron spectroscopy Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics R&D Projects LTT18021 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UJF-V - RVO:61389005 UT WOS 000706748900001 EID SCOPUS 85117265679 DOI 10.1140/epja/s10050-021-00577-7 Annotation The 9.2 and 24.3 keV nuclear transitions in Th-227 were studied in the beta(-) decay of Ac-227 employing the internal conversion electron spectroscopy. Values of (9244.6 +/- 0.8) and (24343.1 +/- 1.1) eV were determined for their energies. The 24.3 keV transition was found to be of the mixed (M1 + E2) multipolarity with the spectroscopic admixture parameter delta(2) (E2/M1)=(0.0116 +/- 0.0004). Energies of (24342.9 +/- 1.2), (28613.3 +/- 1.7), and (37860.2 +/- 2.0) eV were obtained respectively for the 24.3, 28. 6, and 37.8 keV transitions in Th-227 by means of the gamma-ray spectroscopy. Natural atomic-level widths of (14.1 +/- 0.5), (11.4 +/- 0.5), (6.9 +/- 0.4), (11.4 +/- 1.4), (8.6 +/- 1.2), and (6.0 +/- 0.7) eV for the M-1-, M-2-, M-3-, N-1-, N-2-, and N-3-subshells of thorium, respectively, were derived from conversion electron lines. The cross checking of the energy values of the 9.2, 15.1, and 24.3 keV nuclear transitions obtained by the ICES method is also given. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2022 Electronic address https://doi.org/10.1140/epja/s10050-021-00577-7
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