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

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Author list: Smit FD, Nemulodi F, Buthelezi Z, Carter J, Fearick RW, Fortsch SV, Freer M, Fujita H, Jingo M, Kureba CO, Mabiala J, Mira J, Neveling R, Papka P, Steyn GF, Swartz JA, Usman IT, van Zyl JJ

Publisher: American Physical Society

Place: COLLEGE PK

Publication year: 2012

Journal acronym: PHYS REV C

Volume number: 86

Issue number: 3

Number of pages: 3

ISSN: 0556-2813

eISSN: 1089-490X

Languages: English-Great Britain (EN-GB)

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Abstract

An experiment using the B-11(He-3,d)C-12 reaction was performed at iThemba LABS at an incident energy of 44 MeV and analyzed with a high energy-resolution magnetic spectrometer, to reinvestigate states in C-12 published in 1971. The original investigation reported the existence of an 11.16 MeV state in C-12 that displays a 2(+) nature. In the present experiment, data were acquired at laboratory angles of 25 degrees, 30 degrees, and 35 degrees, which is part of the center-of-mass (c.m.) angle range in the original measurements where a clear 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 C-12.

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