Investigation of deep inelastic reactions in 238U + 238U at Coulomb barrier energies

C. Golabek; S. Heinz; W. Mittig; F. Rejmund; A.C.C. Villari; S. Bhattacharyva; D. Boilley; G. de France; A. Drouart; L. Gaudefroy; Lydie Giot; V. Maslov; M. Morjean; G. Mukherjee; Yu. Penionzkevich; P. Roussel-Chomaz; C. Stodel

Investigation of deep inelastic reactions in 238U + 238U at Coulomb barrier energies

C. Golabek ¹ S. Heinz ² W. Mittig ¹ F. Rejmund ¹ A.C.C. Villari ¹ S. Bhattacharyva ³ D. Boilley ^{1, 4} G. de France ¹ A. Drouart ⁵ L. Gaudefroy ⁶ Lydie Giot ⁷ V. Maslov ⁸ M. Morjean ¹ G. Mukherjee ³ Yu. Penionzkevich ⁸ P. Roussel-Chomaz ¹ C. Stodel ¹

1 GANIL - Grand Accélérateur National d'Ions Lourds

2 GSI - Helmholtz zentrum für Schwerionenforschung GmbH

3 Variable Energy Cyclotron Centre

4 UNICAEN - Université de Caen Normandie

5 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

6 DPTA - Département de Physique Théorique et Appliquée

DAM/DIF - DAM Île-de-France : DAM/DIF

7 SUBATECH - Laboratoire SUBATECH Nantes

8 FLNR-JINR

Abstract : We investigated deep inelastic reactions in 238U+238U collisions at 6.09, 6.49, 6.91, 7.1 and 7.35×AMeV at the VAMOS spectrometer (GANIL). A large transfer of neutrons and protons was observed at all beam energies. For a transfer of more than 10 nucleons the total kinetic energy of the detected fragments becomes independent of the beam energy and reaches values far below the Coulomb barrier for spherical fragments. This points to the formation of a di-nuclear system in the entrance channel which develops an elongated shape and a strong neck. For such reactions we expect an enhanced lifetime of the di-nuclear system which is significantly longer than the time scale for elastic and quasi-elastic reactions. Different theoretical approaches predict delay times of more than 5 × 10−21 s for a subset of our data.

Document type :

Journal articles

Domain :

Physics [physics] / Nuclear Experiment [nucl-ex]

Complete list of metadatas

http://hal.in2p3.fr/in2p3-00452813
Contributor : Michel Lion <>
Submitted on : Wednesday, February 3, 2010 - 10:18:37 AM
Last modification on : Thursday, March 14, 2019 - 9:24:02 AM

Investigation of deep inelastic reactions in 238U + 238U at Coulomb barrier energies

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Investigation of deep inelastic reactions in 238U + 238U at Coulomb barrier energies

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