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Conference: Bucharest University Faculty of Physics 2003 Meeting

Section: Nuclear and Elementary Particles Physics

Title:

Identification Method of the Nuclear Fragments in Emulsions

Authors:

Alexandru JIPA*, Florin CONSTANTIN**, Silvia OCHESANU*, Costin CARAMARCU*, Emil STAN***, Marius CALIN*

Affiliation:

* Atomic and Nuclear Physics Department, Faculty of Physics, University of Bucharest, ROMANIA

** Institute of Nuclear Physics and Engineering "Horia Hulubei" Bucharest-Magurele, ROMANIA

*** Institute of SPace Sciences Bucharest-Magurele, ROMANIA

E-mail: jipa@brahms.fizica.unibuc.ro

E-mail

Keywords:

Abstract:

The vizualization detectors have beeen succesfuly used from the begining of the study of the relativistic nuclear collisions. One of these detectors used in such experiments is the nuclear emulsion. To increase the spead of the passage from pictures to experimental data different methods and tools have been proposed during the time. For identifing the nuclear fragments obtained in the relativistic radioactive beams multiple layers of nuclear emulsions have been exposed in experiments performed at the Syncrophasotron from the JINR Dubna (BECQUEREL Collaboration). The nuclear fragments have been idenified using PAVICOM scanning and measuring system. In the present work a identification method based on a real time image processing machine and a reconstruction algorithm based on special conformal transforms is proposed. The results obtained by this method are compared with those obtained using PAVICOM device. Because in this study only pictures have been used, not initial nuclear emulsions, some difficulties in the identification of the nuclear fragments with higher polar angles can appear. Generaly, comparable results have been obtained. The authors thank Dr.Pavel Zarubin from JINR Dubna, Laboratory of High Energy Physics, and Dr.Maria Haiduc, Institute of Space Sciences Bucharest-Magurele, for the pictures of the nuclear emulsons exposed in these experiments.