General Info

Field	Value
Experiment Number	e516a
Title	Isotopic distribution of fission fragment yields in transfer induced fission using inverse kinematics
Spokeperson(s)	Fanny , Farget
Data Manager(s)	Antoine, Lemasson
GANIL Scientific Coordinator
Collection Dates (dd-mm-yy)	Start: 16-07-2011 End: 24-07-2011
End of Embargo	24-07-2014
DOI	10.26143/ganil-2011-e516a
DOI State	findable
Publication Year	2011
Publisher	GANIL, Large Heavy Ion National Accelerator, Caen, France
Data Curator
Hosting Institution
Size	0.263 TB

Experiment details

Abstract

During the fission process, the atomic nucleus deforms and elongates up to the two fragments inception and their final separation at the scission deformation. The evolution of the nucleus energy with deformation defines a potential energy landscape in the multi-dimensional deformation space. It is determined by the macroscopic properties of the nucleus, and is also strongly influenced by the single-particle structure of the nucleus, which modifies the macroscopic energy minima. The fission fragment distribution is a direct consequence of the deformation path the nucleus has encountered, and therefore is the most genuine experimental observation of the potential energy landscape of the deforming nucleus. Very asymmetric fusion-fission reactions at energy close to the Coulomb barrier, produce well-defined conditions of the compound nucleus formation, where processes such as quasi-fission, pre-equilibrium emission and incomplete fusion are negligible. In the same time, the excitation energy is sufficient to reduce significantly structural effects, and mostly the macroscopic part of the potential is responsible for the formation of the fission fragments. We use inverse kinematics combined with a spectrometer to select and identify the fission fragments produced in 238 U+12 C at a bombarding energy close to and well-above the Coulomb barrier. For the first time, the isotopic yields will be measured over the complete atomic-number distribution, between Z=30 and Z=63. In the experimental set-up, it is also possible to identify transfer-induced reactions, which lead to low-energy fission where the nuclear shell structure shows a strong influence on the fission-fragment distributions. The resulting set of data will give the possibility to observe the fission fragment properties over a wide range of excitation energy, and they will reveal the vanishing of the shell effects in the potential energy of the fissioning nucleus, as well as the influence of fission dynamics.

Setup

Beam(s)

Target(s)

Studied reaction(s)

Contributors

Given Name	Family Name	Id.	Affiliation(s)
Diego	Ramos		GANIL, Large Heavy Ion National Accelerator, Caen, France (CEA) Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Paris, France
Manuel	Caamaño		(USC) University of Santiago de Compostela, Santiago de Compostela, Spain
Fanny	Farget		GANIL, Large Heavy Ion National Accelerator, Caen, France (CNRS) French National Centre for Scientific Research, Paris, France Institut National de Physique Nucléaire et de Physique des Particules, Paris, France
Carme	Rodríguez-Tajes		GANIL, Large Heavy Ion National Accelerator, Caen, France
Antoine	Lemasson		GANIL, Large Heavy Ion National Accelerator, Caen, France (CNRS) French National Centre for Scientific Research, Paris, France Institut National de Physique Nucléaire et de Physique des Particules, Paris, France
Maurycy	Rejmund		GANIL, Large Heavy Ion National Accelerator, Caen, France
Christelle	Schmitt		(IPHC) Hubert Curien Pluridisciplinary Institute, Strasbourg, France University of Strasbourg, Strasbourg, France
Emmanuel	Clement		GANIL, Large Heavy Ion National Accelerator, Caen, France (CNRS) French National Centre for Scientific Research, Paris, France Institut National de Physique Nucléaire et de Physique des Particules, Paris, France
Laurent	Audouin		(IJCLAB) Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France University of Paris-Saclay, Gif-sur-Yvette, France
Jose	Benlliure		(USC) University of Santiago de Compostela, Santiago de Compostela, Spain
Enrique	Casarejos		(UVIGO) University of Vigo, Vigo, Spain
Dolores	Cortina		(USC) University of Santiago de Compostela, Santiago de Compostela, Spain
Diane	Doré		CEA Paris-Saclay, Gif-sur-Yvette, France (DRF) Direction de la Recherche Fondamentale, Gif-sur-Yvette, France (IRFU) Institut de Recherche sur les Lois Fondamentales de l'Univers, Gif-sur-Yvette, France
Beatriz	Fernández-Domínguez		(USC) University of Santiago de Compostela, Santiago de Compostela, Spain
Gilles	de France		GANIL, Large Heavy Ion National Accelerator, Caen, France
Andreas	Heinz		Chalmers University of Technology, Gothenburg, Sweden
Bertrand	Jacquot		GANIL, Large Heavy Ion National Accelerator, Caen, France
Carlos	Paradela Dobarro		(USC) University of Santiago de Compostela, Santiago de Compostela, Spain
Thomas	Roger		GANIL, Large Heavy Ion National Accelerator, Caen, France

Institutes

Name	Id.
GANIL, Large Heavy Ion National Accelerator, Caen, France
(CNRS) French National Centre for Scientific Research, Paris, France
Institut National de Physique Nucléaire et de Physique des Particules, Paris, France
(CEA) Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Paris, France
(DRF) Direction de la Recherche Fondamentale, Gif-sur-Yvette, France
(USC) University of Santiago de Compostela, Santiago de Compostela, Spain
(IPHC) Hubert Curien Pluridisciplinary Institute, Strasbourg, France
University of Strasbourg, Strasbourg, France
(IJCLAB) Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
University of Paris-Saclay, Gif-sur-Yvette, France
(UVIGO) University of Vigo, Vigo, Spain
CEA Paris-Saclay, Gif-sur-Yvette, France
Chalmers University of Technology, Gothenburg, Sweden
(IRFU) Institut de Recherche sur les Lois Fondamentales de l'Univers, Gif-sur-Yvette, France