Evidence for a New Compact Symmetric Fission Mode in Light Thorium Isotopes
Journal article, 2020

Taking benefit of the R3B/SOFIA setup to measure the mass and the nuclear charge of both fission fragments in coincidence with the total prompt-neutron multiplicity, the scission configurations are inferred along the thorium chain, from the asymmetric fission in the heavier isotopes to the symmetric fission in the neutron-deficient thorium. Against all expectations, the symmetric scission in the light thorium isotopes shows a compact configuration, which is in total contrast to what is known in the fission of the heavier thorium isotopes and heavier actinides. This new main symmetric scission mode is characterized by a significant drop in deformation energy of the fission fragments of about 19 MeV, compared to the well-known symmetric scission in the uranium-plutonium region.

Author

A. Chatillon

The French Alternative Energies and Atomic Energy Commission (CEA)

University Paris-Saclay

J. Taieb

The French Alternative Energies and Atomic Energy Commission (CEA)

University Paris-Saclay

H. Alvarez-Pol

Universidade de Santiagode Compostela

L. Audouin

Institut de Physique Nucleaire Orsay

Y. Ayyad

Universidade de Santiagode Compostela

G. Belier

University Paris-Saclay

The French Alternative Energies and Atomic Energy Commission (CEA)

J. Benlliure

Universidade de Santiagode Compostela

G. Boutoux

The French Alternative Energies and Atomic Energy Commission (CEA)

M. Caamano

Universidade de Santiagode Compostela

E. Casarejos

Universidad de Vigo

D. Cortina-Gil

Universidade de Santiagode Compostela

A. Ebran

The French Alternative Energies and Atomic Energy Commission (CEA)

University Paris-Saclay

F. Farget

Grand Accélérateur National d'Ions Lourds (GANIL)

B. Fernandez-Dominguez

Universidade de Santiagode Compostela

T. Gorbinet

The French Alternative Energies and Atomic Energy Commission (CEA)

L. Grente

The French Alternative Energies and Atomic Energy Commission (CEA)

Andreas Martin Heinz

Subatomic, High Energy and Plasma Physics

Håkan T Johansson

Subatomic, High Energy and Plasma Physics

B. Jurado

Centre d'Etudes Nucleaires de Bordeaux Gradignan

A. Kelic-Heil

GSI Helmholtz Centre for Heavy Ion Research

N. Kurz

GSI Helmholtz Centre for Heavy Ion Research

B. Laurent

The French Alternative Energies and Atomic Energy Commission (CEA)

University Paris-Saclay

J. F. Martin

The French Alternative Energies and Atomic Energy Commission (CEA)

C. Nociforo

GSI Helmholtz Centre for Heavy Ion Research

C. Paradela

Universidade de Santiagode Compostela

E. Pellereau

The French Alternative Energies and Atomic Energy Commission (CEA)

S. Pietri

GSI Helmholtz Centre for Heavy Ion Research

A. Prochazka

GSI Helmholtz Centre for Heavy Ion Research

J. L. Rodriguez-Sanchez

Universidade de Santiagode Compostela

D. Rossi

GSI Helmholtz Centre for Heavy Ion Research

H. Simon

GSI Helmholtz Centre for Heavy Ion Research

L. Tassan-Got

Institut de Physique Nucleaire Orsay

J. Vargas

Universidade de Santiagode Compostela

B. Voss

GSI Helmholtz Centre for Heavy Ion Research

H. Weick

GSI Helmholtz Centre for Heavy Ion Research

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 124 20 202502

Subject Categories

Accelerator Physics and Instrumentation

Subatomic Physics

Other Physics Topics

DOI

10.1103/PhysRevLett.124.202502

More information

Latest update

6/30/2020