| Article | |
| Report number | CERN-PPE-97-029 |
| Title | The nuclear structure of $^{227}$Fr |
| Author(s) |
Kurcewicz, W ; Grant, I S ; Gulda, K ; Aas, A J ; Billowes, J ; García-Borge, M J ; Burke, D G ; Butler, P A ; Cocks, J F C ; Fogelberg, B ; Freeman, S J ; Jones, G D ; Hagebø, E ; Hoff, P ; Hønsi, J ; Lindroth, A ; Løvhøiden, G ; Mach, H ; Martínez, T ; Naumann, R A ; Nybø, K ; Nyman, G H ; Ravn, H L ; Rubio, B ; Simpson, J ; Smith, A G ; Smith, J F ; Steffensen, K ; Taín, J L ; Tengblad, O ; Thorsteinsen, T F |
| Affiliation | (Univ. Warsaw) ; (CERN) ; (The Schuster Laboratory, Manchester Univ.) ; (Univ. Oslo) ; (Inst. Estruct. Mater., CSIC, Madrid) ; (McMaster Univ. Hamilton) ; (Oliver Lodge Lab., Univ. Liverpool) ; (Univ. Uppsala) ; (Inst. Fis. Corpusc., CSIC-Univ. Valencia Burjassot) ; (Dartmouth Coll. Hanover) ; (Univ. Bergen) ; (Chalmers Univ. Technol. Göteborg) ; (CCLRC Daresbury Lab. Warrington) |
| Publication | 1997 |
| Imprint | 12 Mar 1997 |
| Number of pages | 32 |
| In: | Nucl. Phys. A 621 (1997) 827-852 |
| DOI | 10.1016/S0375-9474(97)00190-5 |
| Subject category | Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN ISOLDE ; IS322 |
| Abstract | The $\gamma$-rays following the $\beta^{-}$-decay of $^{227}$Rn have been investigated by means of $\gamma$-ray singles and $\gamma\gamma$-coincidence measurements using an array of 12 Compton-suppressed Ge detectors. The fast timing $\beta\gamma\gamma$(t) method has been used to measure six level lifetimes. Multipolarities of 32 transitions in $^{227}$Fr have been established by measuring conversion electrons with a mini--orange electron spectrometer. Most of the observed transitions have been placed in a level scheme comprising 38 excited states of $^{227}$Fr. The low-lying levels are interpreted in terms of seven rotational bands. The observed E1 strengths for two transitions connecting the K$^{\pi}$=3/2 bands are consistent with the transitional character of $^{227}$Fr, and confirm the presence of octupole correlations in this nucleus. |
Corresponding record in: Inspire
Notice créée le 1997-04-10, modifiée le 2018-09-24
