Fine structure in the α decay of 179Hg and 177Au

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Fine structure in the α decay of 179Hg and 177Au

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Fine structure in the α decay of 179Hg and 177Au

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal A, Hadrons and Nuclei

ISSN

1434-6001

e-ISSN

1434-601X

Svazek periodika

61

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

001439401900001

EID výsledku v databázi Scopus

2-s2.0-86000770638