Facility for studying nuclear structure / Research of properties of superheavy elements

Flerov Laboratory of Nuclear Reactions

Joint Laboratory Seminar

Date and time: Wednesday, 19 November 2025, at 11:00 AM

Venue: Conference Hall, Flerov Laboratory of Nuclear Reactions

1. Seminar topic: “A facility for studying nuclear structure using laser resonance ionisation and fluorescence method”

   Speaker: Victor Zhemenik

   Abstract:
   

   A new experimental facility for measuring isotope shifts and hyperfine structure in the optical spectra of heavy atoms using multistage laser resonance ionisation is being developed. The facility consists of a laser complex, a laser beam transport system, a thermal evaporation chamber for generating quazi parallel beam of neutral atoms, and an ionisation chamber with a detection system.

   The experimental facility for precision measurements of isotope shifts and hyperfine structure in the optical spectra of refractory and non-volatile elements using laser resonance fluorescence is being modernised. Sample evaporation using focused high-power laser radiation is a key feature of the facility. The vacuum system was improved, the laser evaporation system was modified, a new up-to-date pumping laser was added to the laser system of resonant fluorescence excitation. The new equipment is being adapted and adjusted.

   (In connection with the election for the vacant position of a researcher.)




2. Seminar topic: “Research of the chemical and physical properties of superheavy elements at the SHE Factory”

   Speaker: Eyvaz Teymurov

   Abstract:
   

   This work summaries recent research at the GRAND (SHE Factory) and SHELS Separators, along with their associated detection systems, including GABRIELA, SFiNX, and silicon strip detector modules for gas chemistry. The team took part in several series of experiments, such as the Ca⁴⁸+Pu²⁴² → Fl²⁸⁷ + ³n production reactions at GRAND and the Mg²⁶ + U²³⁸ → Rf²⁶⁰+ ⁴n experiments at SHELS. Despite the short time of the experiments, experience of operating both facilities was gained. Geant4 simulations of the α-decay of Fl²⁸⁷ was performed within a silicon strip chemical detector system.

   (In connection with the election for the vacant position of a junior researcher.)