| Article | |
| Report number | arXiv:2407.09846 |
| Title | Decay study of with an optical time-projection chamber Decay study of $^{11}$Be with an Optical TPC detector |
| Author(s) |
Sokołowska, N. (Warsaw U.) ; Guadilla, V. (Warsaw U.) ; Mazzocchi, C. (Warsaw U.) ; Ahmed, R. (NCP, Islamabad) ; Borge, M.J.G. (Madrid, Inst. Estructura Materia) ; Cardella, G. (INFN, Catania) ; Ciemny, A.A. (Warsaw U.) ; Cosentino, L.G. (INFN, Catania) ; De Filippo, E. (Messina U. ; INFN, Catania) ; Fedosseev, V. (CERN) ; Fijałkowska, A. (Warsaw U.) ; Fraile, L.M. (Madrid U.) ; Geraci, E. (INFN, Catania ; Catania U.) ; Giska, A. (Warsaw U.) ; Gnoffo, B. (INFN, Catania ; Catania U.) ; Granados, C. (CERN) ; Janas, Z. (Warsaw U.) ; Janiak, Ł. (Warsaw U. ; Soltan Inst., Swierk) ; Johnston, K. (CERN) ; Kamiński, G. (Warsaw U., Heavy Ion Lab) ; Korgul, A. (Warsaw U.) ; Kubiela, A. (Warsaw U.) ; Maiolino, C. (INFN, Catania) ; Marsh, B. (CERN) ; Martorana, N.S. (Messina U. ; INFN, Catania) ; Miernik, K. (Warsaw U.) ; Molkanov, P. (Unlisted) ; Ovejas, J.D. (Madrid, Inst. Estructura Materia) ; Pagano, E.V. (INFN, Catania) ; Pirrone, S. (INFN, Catania) ; Pomorski, M. (Warsaw U.) ; Quynh, A.M. (Dalat U.) ; Riisager, K. (Aarhus U.) ; Russo, A. (INFN, Catania) ; Russotto, P. (INFN, Catania) ; Świercz, A. (AGH-UST, Cracow) ; Viñals, S. (Madrid, Inst. Estructura Materia) ; Wilkins, S. (CERN) ; Pfützner, M. (Warsaw U.) |
| Publication | 2024-09-26 |
| Imprint | 2024-07-13 |
| Number of pages | 16 |
| In: | Phys. Rev. C 110 (2024) 034328 |
| DOI | 10.1103/PhysRevC.110.034328 (publication) |
| Subject category | nucl-ex ; Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN ISOLDE |
| Abstract | The $\beta$ decay of one-neutron halo nucleus $^{11}$Be was investigated using the Warsaw Optical Time Projection Chamber (OTPC) detector to measure $\beta$-delayed charged particles. The results of two experiments are reported. In the first one, carried out in LNS Catania, the absolute branching ratio for $\beta$-delayed $\alpha$ emission was measured by counting incoming $^{11}$Be ions stopped in the detector and the observed decays with the emission of $\alpha$ particle. The result of 3.27(46)% is in good agreement with the literature value. In the second experiment, performed at the HIE-ISOLDE facility at CERN, bunches containing several hundreds of $^{11}$Be ions were implanted into the OTPC detector followed by the detection of decays with the emission of charged particles. The energy spectrum of $\beta$-delayed $\alpha$ particles was determined in the full energy range. It was analysed in the R-matrix framework and was found to be consistent with the literature. The best description of the spectrum was obtained assuming that the two $3/2^+$ and one $1/2^+$ states in $^{11}$B are involved in the transition. The search for $\beta$-delayed emission of protons was undertaken. Only the upper limit for the branching ratio for this process of $(2.2 \pm 0.6_{\rm stat} \pm 0.6_{\rm sys}) \times 10^{-6}$ could be determined. This value is in conflict with the result published in [Ayyad et al. Phys. Rev. Lett. 123, 082501 (2019)] but does agree with the limit reported in [Riisager et al., Eur. Phys. J. A (2020) 56:100] |
| Copyright/License | publication: © 2024 authors (License: CC BY 4.0) preprint: (License: CC BY 4.0) |
Corresponding record in: Inspire
Record created 2024-07-18, last modified 2024-10-24