New β-delayed proton lines from 23 Al

We report on a new measurement of the β-delayed proton spectrum of 23Al. Higher statistics compared to previous measurements allow us to identify new proton lines in the energy range 1–2 MeV. A statistical analysis of the observed β strength shows that the B (GT) values are fully consistent with having a Porter-Thomas distribution. This is indicative of chaotic behaviour and implies that only the average β strength carries physical meaning.This work has been supported by the EU 6th Framework Programme “Integrating Infrastructure Initiative—Transnational Access”, Contract No. 506065 (EURONS, JRAs TRAPSPEC and DLEP), by the Academy of Finland under the Finnish Centre of Excellence Programme 2006-2011 (Project No. 213503, Nuclear and Accelerator Based Physics Programme at JYFL), by the Nordic Infrastructure Project (NordForsk Project No. 070315) and by the Spanish Funding Agency MICINN (Contract No. FPA2009-07387).Peer Reviewe

New

We report on a new measurement of the β-delayed proton spectrum of 23Al. Higher statistics compared to previous measurements allow us to identify new proton lines in the energy range 1–2 MeV. A statistical analysis of the observed β strength shows that the B (GT) values are fully consistent with having a Porter-Thomas distribution. This is indicative of chaotic behaviour and implies that only the average β strength carries physical meaning