Leader: Gadir Ahmadov
Work phone number: +7 (496) 216-36-83
Work E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Scientific problem:
Although nuclear fission was discovered more than 80 years ago, several key aspects of its mechanism, especially in complex fission modes, have been only partially studied. Binary fission, in which a nucleus splits into two main fragments, has been extensively studied. However, ternary fission, a process in which two heavy fragments are emitted along with a light charged particle (LCP), presents unique physical phenomena that provides deeper insights into the dynamics of nuclear fission. These particles carry critical information about the statistical and dynamic properties of the fissile nucleus during fission. Despite the large number of ternary fission experiments, they have primarily focused on heavier LCPs, such as alpha particles. Lighter charged particles (such as, protons, deuterons, tritons) were out of sight due to the specific objectives of previous experiments and limitations in earlier detection systems, especially in terms of position sensitivity, energy resolution and detection threshold. The use of advanced semiconductor position-sensitive detectors , such as Timepix and telescopes based on them, as well as common silicon detectors enables precise measurements of the yield, time, angular and energy distributions of LCPs emitted during ternary fission. By focusing on neutron-induced and spontenous ternary fission, students will be able to contribute to a major area of nuclear physics.
Objective:
To study the emission of light charged particles in ternary spontenous and neutron induced fission, focusing on yield, angular, energy distributions and identification of charged particles.
Tasks:
1. Literature review on ternary fission processes and experimental techniques.
2. Carrying out simulation-based identification of charged particles using specific energy loss (dE) and total energy (E) measurements.
3. Learning operation concepts of semiconductor pixel detectors (Timepix) and conventional silicon detectors.
4. Carrying out energy calibration of the detectors.
5. Implementation of test experiments using ∆E–E telescopes based on Timepix and conventional silicon detectors.
6. Analysis of experimental data to identify and characterize ternary charged particles.
7. Measurment of energy distributions of light charged particles (LCPs) emitted in ternary fission.
8. Preparation and submission of results for publication and reports.
Research facilities:
The paper will be completed under the project “Investigations of neutron nuclear interactions and properties of the neutron” at the IREN facility of FLNP JINR and in the Institute of Nuclear Physics (Kazakhstan).