A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Octupole states in 207Tl studied through β decay (2020)
Berry, T. A., Podolyák, Zs., Carroll, R. J., Lica, R., Brown, B. A., Grawe, H., Sotty, Ch., Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Cresswell, J. R., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gamba, E., Gelletly, W., . . . De Witte, H. (2020). Octupole states in 207Tl studied through β decay. Physical Review C, 101(5), Article 054311. https://doi.org/10.1103/PhysRevC.101.054311
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Berry, T. A.; Podolyák, Zs.; Carroll, R. J.; Lica, R.; Brown, B. A.; Grawe, H.; Sotty, Ch.; Timofeyuk, N. K.; Alexander, T.; Andreyev, A. N.; et al.
Lehti tai sarja: Physical Review C
ISSN: 2469-9985
eISSN: 2469-9993
Julkaisuvuosi: 2020
Volyymi: 101
Lehden numero: 5
Artikkelinumero: 054311
Kustantaja: American Physical Society
Julkaisumaa: Yhdysvallat (USA)
Julkaisun kieli: englanti
DOI: https://doi.org/10.1103/PhysRevC.101.054311
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/69111
Tiivistelmä
The β decay of 207Hg into the single-proton-hole nucleus 207Tl has been studied through γ-ray spectroscopy at the ISOLDE Decay Station (IDS) with the aim of identifying states resulting from coupling of the πs−11/2, πd−13/2, and πh−111/2 shell model orbitals to the collective octupole vibration. Twenty-two states were observed lying between 2.6 and 4.0 MeV, eleven of which were observed for the first time, and 78 new transitions were placed. Two octupole states (s1/2-coupled) are identified and three more states (d3/2-coupled) are tentatively assigned using spin-parity inferences, while further h11/2-coupled states may also have been observed for the first time. Comparisons are made with state-of-the-art large-scale shell model calculations and previous observations made in this region, and systematic underestimation of the energy of the octupole vibrational states is noted. We suggest that in order to resolve the difference in predicted energies for collective and noncollective t=1 states (t is the number of nucleons breaking the 208Pb core), the effect of t=2 mixing may be reduced for octupole-coupled states. The inclusion of mixing with t=0,2,3 excitations is necessary to replicate all t=1 state energies accurately.
YSO-asiasanat: ydinfysiikka
Vapaat asiasanat: beta decay; collective levels; nuclear structure and decays; nucleon distribution
Liittyvät organisaatiot
Hankkeet, joissa julkaisu on tehty
- ENSAR2 European Nuclear Science and Application Research 2
- Jokinen, Ari
- Euroopan komissio
OKM-raportointi: Kyllä
Raportointivuosi: 2020
JUFO-taso: 2