Coulomb chronometry to probe the decay mechanism of hot nuclei

Diego Gruyer; J.D. Frankland; E. Bonnet; A. Chbihi; G Ademard; M. Boisjoli; B Borderie; R. Bougault; E Galichet; J Gauthier; D Guinet; P Lautesse; N. Le Neindre; E Legouée; I Lombardo; Olivier Lopez; L. Manduci; P. Marini; K Mazurek; P. Nadtochy; M. Pârlog; M.F. Rivet; R. Roy; E Rosato; G Spadaccini; G Verde; E. Vient; M Vigilante; J.P. Wieleczko

doi:10.1103/PhysRevC.92.064606

Coulomb chronometry to probe the decay mechanism of hot nuclei

Diego Gruyer ¹ J.D. Frankland ¹ E. Bonnet ¹ A. Chbihi ¹ G Ademard ² M. Boisjoli ¹ B Borderie ² R. Bougault ³ E Galichet ^{4, 2} J Gauthier ⁵ D Guinet ⁶ P Lautesse ⁶ N. Le Neindre ³ E Legouée ³ I Lombardo ^{7, 8} Olivier Lopez ³ L. Manduci ⁹ P. Marini ¹ K Mazurek ¹⁰ P. Nadtochy ¹¹ M. Pârlog ³ M.F. Rivet ² R. Roy ⁵ E Rosato ^{8, 7} G Spadaccini ⁸ G Verde ^{12, 2} E. Vient ³ M Vigilante ^{8, 7} J.P. Wieleczko ¹

1 GANIL - Grand Accélérateur National d'Ions Lourds

2 IPNO - Institut de Physique Nucléaire d'Orsay

3 LPCC - Laboratoire de physique corpusculaire de Caen

4 CNAM Paris - Centre d'enseignement Cnam Paris

5 Université Laval

6 IPNL - Institut de Physique Nucléaire de Lyon

7 Università degli studi di Napoli Federico II

8 INFN, Sezione di Napoli - Istituto Nazionale di Fisica Nucleare, Sezione di Napoli

9 EAMEA - Ecole des Applications Militaires de l'Energie Atomique

10 H.Niewodniczanski Institute of Nuclear Physics

11 Omsk State University

12 INFN - Istituto Nazionale di Fisica Nucleare, Sezione di Catania

Abstract : In 129 Xe+ nat Sn central collisions from 8 to 25 MeV/A, the three-fragment exit channel occurs with a significant cross section. We show that these fragments arise from two successive binary splittings of a heavy composite system. The sequence of fragment production is determined. Strong Coulomb proximity effects are observed in the three-fragment final state. A comparison with Coulomb trajec-tory calculations shows that the time scale between the consecutive break-ups decreases with increasing bombarding energy, becoming quasi-simultaneous above excitation energy E * = 4.0±0.5 MeV/A. This transition from sequential to simultaneous break-up was interpreted as the signature of the onset of multifragmentation for the three-fragment exit channel in this system.

Keywords : sequential fission onset of multifragmentation incomplete fusion chronometer time scale low and intermediate energy multifragmentation threshold heavy-ion reactions three-fragment correlations

Type de document :

Article dans une revue

Physical Review C, American Physical Society, 2015, 92, pp.064606. 〈10.1103/PhysRevC.92.064606〉

Domaine :

Physique [physics] / Physique Nucléaire Expérimentale [nucl-ex]

Liste complète des métadonnées

http://hal.in2p3.fr/in2p3-00867220
Contributeur : Diego Gruyer <>
Soumis le : jeudi 19 novembre 2015 - 10:46:38
Dernière modification le : mardi 19 février 2019 - 11:16:01
Document(s) archivé(s) le : vendredi 28 avril 2017 - 15:19:47

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