Decay study of Be 11 with an optical time-projection chamber
Year: 2024
Type: article
Abstract: The β decay of one-neutron halo nucleus Be 11 was investigated using the Warsaw Optical Time Projection Chamber (OTPC) detector to measure β -delayed charged particles. The results of two experiments are reported. In the first one, carried out in LNS Catania, the absolute branching ratio for β -delayed α emission was measured by counting incoming Be 11 ions stopped in the detector and the observed decays with the emission of α 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 Be 11 ions were implanted into the OTPC detector followed by the detection of decays with the emission of charged particles. The energy spectrum of β -delayed α particles was determined in the full energy range. It was analyzed 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 B 11 are involved in the transition. The search for β -delayed emission of protons was undertaken. Only the upper limit for the branching ratio for this process of ( 2.2 ± 0 . 6 stat ± 0 . 6 sys ) × 10 − 6 could be determined. This value is in conflict with the result published by Ayyad [] but does agree with the limit reported by Riisager []. Published by the American Physical Society 2024
Source: Physical Review C
Authors: N. Sokołowska, V. Guadilla, C. Mazzocchi, R. Ahmed, M. J. G. Borge, G. Cardella, A. A. Ciemny, L. G. Cosentino, E. De Filippo, V. Fedosseev, A. Fijałkowska, L. M. Fraile, E. Geraci, A. Giska, B. Gnoffo, C. Granados, Z. Janas, Ł. Janiak, K. Johnston, G. Kamiński, A. Korgul, A. Kubiela, C. Maiolino, B. Marsh, N. S. Martorana, K. Miernik, P. Molkanov, J. D. Ovejas, E. V. Pagano, S. Pirrone, M. Pomorski, A. M. Quynh, K. Riisager, A. Russo, P. Russotto, A. Świercz, S. Viñals, S. Wilkins, M. Pfützner
Institutions: University of Warsaw, Abdus Salam Centre for Physics, Consejo Superior de Investigaciones Científicas, Instituto de Estructura de la Materia, Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, European Organization for Nuclear Research, Universidad Complutense de Madrid, University of Catania, National Centre for Nuclear Research, Aarhus University, AGH University of Krakow
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4402861685