Clarification of the Three-Body Decay of 12C (12.71 MeV)

Using β decays of a clean source of 12 N produced at the IGISOL facility, we have measured the breakup of the 12 C (12.71 MeV) state into three α particles with a segmented particle detector setup. The high quality of the data permits solving the question of the breakup mechanism of the 12.71 MeV state, a longstanding problem in few-body nuclear physics. Among existing models, a modified sequential model fits the data best, but systematic deviations indicate that a three-body description is needed

Study of β-delayed charged particle emission of 11Li: Evidence of new decay channels

5 pags., 3 figs. -- 9th International Conference on Clustering Aspects of Nuclear Structure and Dynamics (CLUSTERS'07) 3–7 September 2007, Stratford upon Avon, UKThe break-up of the 18.2 MeV state in 11Be was studied in a 11Li β-decay experiment. We report here on the study of the dominating breakup channels involving na6He or 3n2α in the final state, with special emphasis dedicated in this contribution to the three-particle channel. The two emitted charged particles were detected in coincidence using a highly segmented experimental set-up. The observed experimental energy-vs-energy scatter plot indicates a sequential breakup where nuclei of mass 4, alpha particles, and mass 7, 7He, are involved. A Monte-Carlo simulation of the sequential channel, 11Be* → α + 7He → nα6He was performed and compared to the experimental data and to a simulation of the direct break-up of the 18.2 MeV state nα6He by phase space energy distribution. The energy-versus-energy plot are explained by the sequential simulation but not by the phase space simulation. © 2008 IOP Publishing Ltd

Research Overview -- Mistree and Allen Students Part II

Presentation given for SRL meeting Summer 200

Clarification of the three-body decay of C-12 (12.71 MeV)

4 pages, 2 figures.--PACS nrs.: 21.45.+v; 23.40.–s; 27.20.+n.Using beta decays of a clean source of N-13 produced at the IGISOL facility, we have measured the breakup of the C-12 (12.71 MeV) state into three alpha particles with a segmented particle detector setup. The high quality of the data permits solving the question of the breakup mechanism of the 12.71 MeV state, a longstanding problem in few-body nuclear physics. Among existing models, a modified sequential model fits the data best, but systematic deviations indicate that a three-body description is needed.This research was supported by the Academy of Finland under the Finnish Centre of Excellence Programme 2000-2005 (Project No. 44875, Nuclear and Condensed Matter Physics Programme at JYFL), by the Spanish Agency CICYT under Contract No. AEN99-1046-C02-02, and by the European Union Fifth Framework Programme ‘‘Improving Human Potential–Access to Research Infrastructure.’’Peer reviewe

Clarification of the Three-Body Decay of ¹²C (12.71 MeV)

A study was performed on clarification of the three-body decay of 12C (12.71 MeV). The breakup of the 12C state into three α particles with a segmented particle detector setup was measured. It was shown that the high quality of the data permitted solving the question of the breakup mechanism of the 12.71 MeV state.</p

Clarification of the Three-Body Decay of ¹²C (12.71 MeV)

A study was performed on clarification of the three-body decay of 12C (12.71 MeV). The breakup of the 12C state into three α particles with a segmented particle detector setup was measured. It was shown that the high quality of the data permitted solving the question of the breakup mechanism of the 12.71 MeV state.</p

Clarification of the Three-Body Decay of ¹²C (12.71 MeV)

A study was performed on clarification of the three-body decay of 12C (12.71 MeV). The breakup of the 12C state into three α particles with a segmented particle detector setup was measured. It was shown that the high quality of the data permitted solving the question of the breakup mechanism of the 12.71 MeV state.</p

Clarification of the Three-Body Decay of ¹²C (12.71 MeV)

A study was performed on clarification of the three-body decay of 12C (12.71 MeV). The breakup of the 12C state into three α particles with a segmented particle detector setup was measured. It was shown that the high quality of the data permitted solving the question of the breakup mechanism of the 12.71 MeV state.</p