A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Simultaneous γ-ray and electron spectroscopy of 182,184,186Hg isotopes (2023)
IDS Collaboration. (2023). Simultaneous γ-ray and electron spectroscopy of 182,184,186Hg isotopes. Physical Review C, 108(1), Article 014308. https://doi.org/10.1103/PhysRevC.108.014308
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: IDS Collaboration
Lehti tai sarja: Physical Review C
ISSN: 2469-9985
eISSN: 2469-9993
Julkaisuvuosi: 2023
Ilmestymispäivä: 06.07.2023
Volyymi: 108
Lehden numero: 1
Artikkelinumero: 014308
Kustantaja: American Physical Society (APS)
Julkaisumaa: Yhdysvallat (USA)
Julkaisun kieli: englanti
DOI: https://doi.org/10.1103/PhysRevC.108.014308
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/89152
Tiivistelmä
Purpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in 182,184,186Hg, and to interpret the results in the framework of shape coexistence using different models.
Method: The low-energy structures in 182,184,186Hg were populated in the β decay of 182,184,186Tl, produced at ISOLDE, CERN and purified by laser ionization and mass separation. The γ-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes.
Results: In total, 193, 178, and 156 transitions, including 144, 140, and 108 observed for the first time in a β-decay experiment, were assigned to 182,184,186Hg, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an E0 component. Extracted branching ratios allowed the sign of the interference term in 182Hg as well as ρ2(E0;0+2→0+1) and B(E2;0+2→2+1) in 184Hg to be determined. By means of electron-electron coincidences, the 0+3 state was identified in 184Hg. The experimental results were qualitatively reproduced by five theoretical approaches, the interacting boson model with configuration mixing with two different parametrizations, the general Bohr Hamiltonian, the beyond mean-field model, and the symmetry-conserving configuration-mixing model. However, a quantitative description is lacking.
Conclusions: The presence of shape coexistence in neutron-deficient mercury isotopes was confirmed and evidence for the phenomenon existing at higher energies was found. The new experimental results provide important spectroscopic input for future Coulomb excitation studies.
YSO-asiasanat: ydinfysiikka; isotoopit; elohopea; spektroskopia
Liittyvät organisaatiot
Hankkeet, joissa julkaisu on tehty
- ENSAR2 European Nuclear Science and Application Research 2
- Jokinen, Ari
- Euroopan komissio
- Masses, Isomers and Decay Studies for Elemental Nucleosynthesis
- Kankainen, Anu
- Euroopan komissio
- Intruder-tilojen rakenne raskaissa ytimissä
- Pakarinen, Janne
- Suomen Akatemia
OKM-raportointi: Kyllä
Raportointivuosi: 2023
JUFO-taso: 2