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Observation of gamm...
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Kirsebom, O. S.Århus Universitet,Aarhus University
(author)
Observation of gamma-delayed 3 alpha breakup of the 15.11 and 12.71 MeV states in C-12
- Article/chapterEnglish2009
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LIBRIS-ID:oai:research.chalmers.se:573b24fb-67f7-4a4f-be64-21af46e7062c
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https://research.chalmers.se/publication/103395URI
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https://doi.org/10.1016/j.physletb.2009.08.034DOI
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Language:English
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Summary in:English
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The reactions B-10(He-3, p alpha alpha alpha) at 4.9 MeV and B-11(He-3, d alpha alpha alpha) at 8.5 MeV have been used to investigate the gamma decay of states in C-12. By measuring the four-body final state in complete kinematics we are able to detect gamma transitions indirectly. We find gamma transitions from the 15.11 MeV state in C-12 to the 12.71, 11.83, 10.3 and 7.65 MeV states followed by their breakup into three alpha particles. The relative gamma-ray branching ratios obtained are (1.2 +/- 0.3), (0.32 +/- 0.12), (1.4 +/- 0.2) and (4.4 +/- 0.8)%, respectively, with the remaining (92.7 +/- 1.0)% of the gamma decays going to the bound states. We obtain Gamma(alpha)/Gamma = (2.8 +/- 1.2)% for the isospinforbidden alpha decay of the 15.11 MeV state. From the 12.71 MeV state we find gamma transitions to the 10.3 and 7.65 MeV states. The relative gamma-ray branching ratios are (0.9(-0.5)(+0.6)) and (2.6(-1.2)(+1.6))%, respectively, with the remaining (96.6(-1.3)(+1.7))% of the gamma decays going to the bound states. Finally. we discuss the relation between the beta decay of N-12 and B-12 to states in C-12 and the gamma decay of the 15.11 MeV analog in C-12 to the same states. (C) 2009 Elsevier B.V. All rights reserved.
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Alcorta, M.CSIC - Instituto de Estructura de la Materia (IEM)
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Borge, M. J. G.CSIC - Instituto de Estructura de la Materia (IEM)
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Cubero, M.CSIC - Instituto de Estructura de la Materia (IEM)
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Diget, C. A.University of York
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Dominguez-Reyes, R.CSIC - Instituto de Estructura de la Materia (IEM)
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Fraile, L.CSIC - Instituto de Estructura de la Materia (IEM)
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Fulton, B. R.University of York
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Fynbo, H. O. U.Århus Universitet,Aarhus University
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Galaviz, D.CSIC - Instituto de Estructura de la Materia (IEM)
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Garcia, G.Universidad Autonoma de Madrid (UAM)
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Hyldegaard, S.Århus Universitet,Aarhus University
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Jeppesen, H. B.Århus Universitet,Aarhus University
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Jonson, Björn,1941Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)bjn
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Joshi, P.University of York
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Madurga, M.CSIC - Instituto de Estructura de la Materia (IEM)
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Maria, A.CSIC - Instituto de Estructura de la Materia (IEM)
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Munoz, A.Universidad Autonoma de Madrid (UAM)
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Nilsson, Thomas,1965Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tnilsson
(author)
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Nyman, Göran Hugo,1943Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f2bgn
(author)
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Obradors, D.CSIC - Instituto de Estructura de la Materia (IEM)
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Perea, A.CSIC - Instituto de Estructura de la Materia (IEM)
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Riisager, K.Århus Universitet,Aarhus University
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Tengblad, Olof,1957CSIC - Instituto de Estructura de la Materia (IEM)
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Turrion, M.CSIC - Instituto de Estructura de la Materia (IEM)
(author)
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Århus UniversitetCSIC - Instituto de Estructura de la Materia (IEM)
(creator_code:org_t)
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In:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics: Elsevier BV680:1, s. 44-490370-2693
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Kirsebom, O. S.
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Alcorta, M.
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Borge, M. J. G.
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Cubero, M.
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Diget, C. A.
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Dominguez-Reyes, ...
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Fraile, L.
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Fulton, B. R.
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Fynbo, H. O. U.
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Galaviz, D.
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Garcia, G.
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Hyldegaard, S.
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Jeppesen, H. B.
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Jonson, Björn, 1 ...
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Joshi, P.
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Madurga, M.
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Maria, A.
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Munoz, A.
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Nilsson, Thomas, ...
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Nyman, Göran Hug ...
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Obradors, D.
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Perea, A.
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Riisager, K.
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Tengblad, Olof, ...
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Turrion, M.
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