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Dynamics of heavy nucleus collisions in the reaction {sup 86}Kr+{sup 165}Ho at 60 MeV/n by means of the DeMoN neutron multi-detector; Etude de la dynamique des collisions entre noyaux lourdes dans la reaction {sup 86}Kr + {sup 165}Ho a 60 MeV/n a l`aide du multidetecteur de neutron DeMoN

Abstract

This work is dedicated to the study of binary dissipative collisions for the system Kr + Ho at 60 AMeV. The first chapter is devoted to the used experimental set-up. In particular, the neutron detector DeMoN and a new parallel plate avalanche counter, achieved for this experiment are described. In the next chapters we analyse the neutron energy spectra. The study is fulfilled through a simulation taking into account two, and then, three sources in order to upraise the excitation energy sharing between the two residual fragments. The final results of the equal excitation energy sharing is compared to the predictions of a statistical model and a participant-spectator one. This study also underlines an intermediate velocity source which has the main characteristics of a neck emission. In the last chapter the neutron energy spectra analysed in the frame of the projectile-like-fragment (PLF) show the existence of the light particle emission component called pre-thermalization. It means that, in a first step of the collision there is a competition between the deposit of energy in the system and its removal. From this analysis we can say that the temperature of the residual fragments is usually overestimated. The resulting temperature of the PLF  More>>
Authors:
Dorvaux, Olivier [1] 
  1. Centre de Recherches Nucleaires de Strasbourg-Cronenbourg, 67 (France)
Publication Date:
Jan 14, 1997
Product Type:
Thesis/Dissertation
Report Number:
CRN-97-19
Reference Number:
SCA: 663450; PA: AIX-30:020263; EDB-99:052788; SN: 99002092591
Resource Relation:
Other Information: DN: 47 refs., 52 figs., 5 tabs.; TH: Theses (Ph.D); PBD: 14 Jan 1997
Subject:
66 PHYSICS; DATA ANALYSIS; ENERGY BALANCE; ENERGY TRANSFER; EXCITATION; HEAVY ION REACTIONS; HOLMIUM 165 TARGET; KRYPTON 86 BEAMS; MEV RANGE 10-100; NEUTRON DETECTORS; THERMALIZATION
OSTI ID:
340769
Research Organizations:
Centre de Recherches Nucleaires de Strasbourg-Cronenbourg, 67 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE99622173; TRN: FR9903068020263
Availability:
INIS; OSTI as DE99622173
Submitting Site:
FRN
Size:
117 p.
Announcement Date:
May 27, 1999

Citation Formats

Dorvaux, Olivier. Dynamics of heavy nucleus collisions in the reaction {sup 86}Kr+{sup 165}Ho at 60 MeV/n by means of the DeMoN neutron multi-detector; Etude de la dynamique des collisions entre noyaux lourdes dans la reaction {sup 86}Kr + {sup 165}Ho a 60 MeV/n a l`aide du multidetecteur de neutron DeMoN. France: N. p., 1997. Web.
Dorvaux, Olivier. Dynamics of heavy nucleus collisions in the reaction {sup 86}Kr+{sup 165}Ho at 60 MeV/n by means of the DeMoN neutron multi-detector; Etude de la dynamique des collisions entre noyaux lourdes dans la reaction {sup 86}Kr + {sup 165}Ho a 60 MeV/n a l`aide du multidetecteur de neutron DeMoN. France.
Dorvaux, Olivier. 1997. "Dynamics of heavy nucleus collisions in the reaction {sup 86}Kr+{sup 165}Ho at 60 MeV/n by means of the DeMoN neutron multi-detector; Etude de la dynamique des collisions entre noyaux lourdes dans la reaction {sup 86}Kr + {sup 165}Ho a 60 MeV/n a l`aide du multidetecteur de neutron DeMoN." France.
@misc{etde_340769,
title = {Dynamics of heavy nucleus collisions in the reaction {sup 86}Kr+{sup 165}Ho at 60 MeV/n by means of the DeMoN neutron multi-detector; Etude de la dynamique des collisions entre noyaux lourdes dans la reaction {sup 86}Kr + {sup 165}Ho a 60 MeV/n a l`aide du multidetecteur de neutron DeMoN}
author = {Dorvaux, Olivier}
abstractNote = {This work is dedicated to the study of binary dissipative collisions for the system Kr + Ho at 60 AMeV. The first chapter is devoted to the used experimental set-up. In particular, the neutron detector DeMoN and a new parallel plate avalanche counter, achieved for this experiment are described. In the next chapters we analyse the neutron energy spectra. The study is fulfilled through a simulation taking into account two, and then, three sources in order to upraise the excitation energy sharing between the two residual fragments. The final results of the equal excitation energy sharing is compared to the predictions of a statistical model and a participant-spectator one. This study also underlines an intermediate velocity source which has the main characteristics of a neck emission. In the last chapter the neutron energy spectra analysed in the frame of the projectile-like-fragment (PLF) show the existence of the light particle emission component called pre-thermalization. It means that, in a first step of the collision there is a competition between the deposit of energy in the system and its removal. From this analysis we can say that the temperature of the residual fragments is usually overestimated. The resulting temperature of the PLF is quite low, and is about 3.5 MeV. (author) 47 refs., 52 figs., 5 tabs.}
place = {France}
year = {1997}
month = {Jan}
}