Fine structure in the α decay of 179Hg and 177Au
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00389265" target="_blank" >RIV/68407700:21670/25:00389265 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1140/epja/s10050-025-01513-9" target="_blank" >https://doi.org/10.1140/epja/s10050-025-01513-9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epja/s10050-025-01513-9" target="_blank" >10.1140/epja/s10050-025-01513-9</a>
Alternative languages
Result language
angličtina
Original language name
Fine structure in the α decay of 179Hg and 177Au
Original language description
The alpha-decay fine structure of 179Hg and 177Au was studied by means of decay spectroscopy. Two experiments were performed at the Accelerator Laboratory of the University of Jyv & auml;skyl & auml; (JYFL), Finland, utilizing the recoil separator RITU and a digital data acquisition system. The heavy-ion induced fusion-evaporation reactions 3682Kr + 44100Ru and 3888Kr + 4292Mo were used to produce the 179Hg and 177Au nuclei, respectively. Studying the evaporation residues (ER, recoils)-alpha 1-alpha 2 correlations and alpha-gamma coincidences, a new alpha decay with E alpha = 6156(10) keV was observed from 179Hg. This decay populates the (9/2-) excited state at an excitation energy of 131.3(5) keV in 175Pt. The internal conversion coefficient for the 131.3(5) keV transition de-exciting this state was measured for the first time. Regarding the 177Au nucleus, a new alpha decay with E alpha = 5998(9) keV was observed to populate the 156.1(6) keV excited state in 173Ir. Two de-excitation paths were observed from this excited state. Moreover, a new 215.7(13) keV transition was observed to depopulate the 424.4(13) keV excited state in 173Ir. Properties of the 179Hg and 177Au alpha decays were examined in a framework of reduced widths and hindrance factors. For clarity and simplicity, the spin and parity assignments (e.g. J pi) are presented without brackets throughout the text.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Physical Journal A, Hadrons and Nuclei
ISSN
1434-6001
e-ISSN
1434-601X
Volume of the periodical
61
Issue of the periodical within the volume
3
Country of publishing house
DE - GERMANY
Number of pages
9
Pages from-to
1-9
UT code for WoS article
001439401900001
EID of the result in the Scopus database
2-s2.0-86000770638