9-13 July 2012
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=11&confId=14"><font color=#ff0000>SAIP2012 PROCEEDINGS AVAILABLE</font></a>

Investigation of the 11.16 MeV state of <sup>12</sup>C

12 Jul 2012, 16:00
Oral Presentation Track B - Nuclear, Particle and Radiation Physics NPRP


Mr fhumulani nemulodi (university of stellenbosch)

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Abstract content <br> &nbsp; (Max 300 words)

For many years there has been a question mark over the existence of the 11.16 MeV state in 12C which is listed in the NNDC database. This state was assumed to be a candidate for the 2+ excited state of the famous Hoyle state (the second 0+ state in 12C). However, this state was only reported once in 1971, with no other measurements supporting the existence of such a state in 12C. Positive identification of the 2+ excited state of the Hoyle state has attracted much interest since the publication of (alpha, alpha') data by Itoh et al. in 2004. This measurement, along with other more recent experiments, show evidence of the existence of a 2+ state in 12C around 10 MeV.

With interest in locating the 2+ alpha cluster state growing rapidly, it was considered important to perform an experiment, with improved equipment and analysis techniques available today, to provide answers regarding the existence of the 11.16 MeV state. An experiment was performed at iThemba LABS with the high energy resolution K600 magnetic spectrometer to investigate the 11B (3He,d) 12C reaction for an incident beam energy of 44 MeV. These experiment conditions mirrors those used in the 1971 study. Measurements were performed at the three spectrometer angles where a clear signature was reported in the previous measurement. The results from the recently completed data analysis will be presented.

Main supervisor (name and email)<br>and his / her institution

Dr. Paul Papka, papka@sun.ac.za, University of Stellembosch

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Primary author

Mr fhumulani nemulodi (university of stellenbosch)


Dr Frederick Smit (iThemba LABS) Dr Iyabo Usman (University of the Witwatersrand) Mr Jacobus Swartz (university of stellenbosch) Mr Joel Mira (university of stellenbosch) Prof. John Carter (University of the Witwatersrand) Prof. Martin Freer (University of Birmingham) Mr Maxwell Jingo (University of the Witwatersrand) Mr Oscar Kureba (University of the Witwatersrand) Dr Paul Papka (university of stellenbosch) Dr Retief Neveling (iThemba LABS) Prof. Roger Fearick (university of Cape Town) Dr Siegfried Fortsch (iThemba LABS) Dr Zinhle Buthelezi (iThemba LABS)

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