12C formation: A classical quest in new light
Paper in proceedings, 2011

In this work we have studied the break‐up of 12C following the reactions 10B(3He,pααα) and 11B(3He,dααα). The study was performed at the 5 MV tandem in Madrid. The break‐up gives us information on excited states in 12C from the famous Hoyle state up to an energy of almost 18 MeV. Using a highly segmented experimental set‐up the simultaneous detection of the three alpha particles in coincidence with a proton or deuteron respectively made possible a full kinematic reconstruction of the break‐up. On the basis of the energies of the 3 α particles and their angular correlations it has been possible to determine the spin and parity of states for cases in which the assignment has been doubtful. Some of these levels will also de‐excite via electromagnetic emission. The comparison between the energy of proton that populate a state of 12C and the sum of the energies of the 3α emitted from the same state makes possible to determine the presence of electromagnetic disintegration (γ) to lower states within 12C followed by the 3α break‐up.

12C

tripple alpha process

particle spectroscopy

multi particle break-up

Author

Olof Tengblad

CSIC - Instituto de Estructura de la Materia (IEM)

M. Alcorta

CSIC - Instituto de Estructura de la Materia (IEM)

M. J. G. Borge

CSIC - Instituto de Estructura de la Materia (IEM)

M. Cubero

CSIC - Instituto de Estructura de la Materia (IEM)

University of Costa Rica

M. Madurga

CSIC - Instituto de Estructura de la Materia (IEM)

A. Perea

CSIC - Instituto de Estructura de la Materia (IEM)

H. O. U. Fynbo

Aarhus University

K. Riisager

Aarhus University

O. Kirsebom

Aarhus University

S. Hyldegaard

Aarhus University

Björn Jonson

Chalmers, Applied Physics, Subatomic Physics

Göran Hugo Nyman

Chalmers, Applied Physics, Subatomic Physics

Thomas Nilsson

Chalmers, Applied Physics, Subatomic Physics

D.G. Diget

University of York

B. Fulton

University of York

AIP Conference Proceedings

0094-243X (ISSN) 1551-7616 (eISSN)

Vol. 1377 270-274

Subject Categories

Subatomic Physics

Physical Sciences

Roots

Basic sciences

DOI

10.1063/1.3628391

ISBN

978-073540937-8

More information

Latest update

3/6/2018 7