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

Greenlees, Paul
Konki, Joonas
Rahkila, Panu

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

OKM-raportointi: Kyllä

Raportointivuosi: 2020

JUFO-taso: 2