Speaker
Description
This study presents an analysis of Nuclear Track Emulsion (NTE) exposed
to an extracted $^{124}$Xe$^{54+}$ beam at around 300 MeV per nucleon at the JINR
Nuclotron, conducted within the framework of the BECQUEREL project[1].
The primary aim was to characterize the beam profile and its uniformity, and
to determine the Bragg peak position, in support of applied research in electronic components and radiation biology. Three stacks, each consisting of 8-10 nuclear emulsion layers with a thickness of 60 µm deposited on a 2 mm thick
glass substrate were exposed transversely to the beam. This configuration enabled the recording of the ion trajectories and their energy deposition along
the penetration depth, including the stopping region and the production of long
range fragments. The area of each emulsion layer was digitally imaged using an
Olympus BX63 intelligent microscope[2]. Owing to the high ionization density
of the incident $^{124}$Xe$^{54+}$ ions, a 4X objective was sufficient for reliable track detection. A Gaussian Mixture Model (GMM) applied to the measured grain area
distributions enabled the classification of tracks into three principal groups corresponding to light fragments, intermediate mass fragments, and heavy residues,
including the primary beam ions.
References
[1] P. I. Zarubin, Lect. Notes Phys. 875, 51-93 (2014) doi:10.1007/978-3-319-
01077-9 3 [arXiv:1309.4881].
[2] J. Ronald Lawrence, JINR START Project Report,(2026). https:
//start.jinr.ru/uploads/report_files/report_student_6639_
project_1144.pdf
