No evidence of an 11.16 MeV 2+ state in 12C

C. O. Kureba; F. D. Smit; F. Nemulodi; G. F. Steyn; H. Fujita; I. T. Usman; J. A. Swartz; J. Carter; J. J. van Zyl; J. Mabiala

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No evidence of an 11.16 MeV 2+ state in 12C

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arxiv 1206.4217 v1 pith:2JSVUKCH submitted 2012-06-19 nucl-ex

No evidence of an 11.16 MeV 2+ state in 12C

F. D. Smit , F. Nemulodi , Z. Buthelezi , J. Carter , R. F. Fearick , S. V. Foertsch , M. Freer , H. Fujita

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M. Jingo C. O. Kureba J. Mabiala J. Mira R. Neveling P. Papka G. F. Steyn J. A. Swartz I. T. Usman J. J. van Zyl

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An experiment using the 11B(3He,d)12C reaction was performed at iThemba LABS at an incident energy of 44 MeV and analyzed with a high energy-resolution magnetic spectrometer, to re-investigate states in 12C published in 1971. The original investigation reported the existence of an 11.16 MeV state in 12C that displays a 2+ nature. In the present experiment data were acquired at laboratory angles of 25-, 30- and 35- degrees, to be as close to the c.m. angles of the original measurements where the clearest signature of such a state was observed. These new low background measurements revealed no evidence of the previously reported state at 11.16 MeV in 12C.

No evidence of an 11.16 MeV 2+ state in 12C

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