In-gas-jet laser spectroscopy near the proton dripline (LASOR)
Main funder
Funder's project number: 315179
Funds granted by main funder (€)
- 530 109,00
Funding program
Project timetable
Project start date: 01/09/2018
Project end date: 31/08/2022
Summary
The proposed project is aimed at improving our understanding of the proton-neutron interaction by probing, using optical techniques, proton-rich nuclei with N~Z and mass close to A=100. Such nuclei are ideal laboratories due to a large spatial overlap between the single-particle wave functions arising from the occupation of the same shell-model orbitals. Nevertheless, their experimental study has been hindered due to very low production cross sections and an often overwhelming "hostile" environment of unwanted contaminant reaction products.
In order to study the key nuclei, it is necessary to develop state-of-the-art instrumentation and to combine a large number of experimental techniques in a unique manner. A complex combination of recoil separator, stopping gas cell, mass spectrometer and resonant laser spectroscopy will be employed. By probing atomic hyperfine structures and isotope shifts, fundamental properties of the nucleus may be measured in a model-independent manner. These include a direct determination of the nuclear spin, electromagnetic moments and changes in mean-squared charge radii. These properties will then be tested against a range of state-of-the-art theoretical approaches, from large-scale shell model calculations, to ab-initio and mean field approaches.
In order to study the key nuclei, it is necessary to develop state-of-the-art instrumentation and to combine a large number of experimental techniques in a unique manner. A complex combination of recoil separator, stopping gas cell, mass spectrometer and resonant laser spectroscopy will be employed. By probing atomic hyperfine structures and isotope shifts, fundamental properties of the nucleus may be measured in a model-independent manner. These include a direct determination of the nuclear spin, electromagnetic moments and changes in mean-squared charge radii. These properties will then be tested against a range of state-of-the-art theoretical approaches, from large-scale shell model calculations, to ab-initio and mean field approaches.
Principal Investigator
Primary responsible unit
Follow-up groups
Profiling area: Accelerator and Subatomic Physics (University of Jyväskylä JYU)
Related publications and other outputs
- Direct high-precision measurement of the mass difference of 77As–77Se related to neutrino mass determination (2024) Ge, Z.; et al.; A1; OA
- High-Precision Mass Measurements of Neutron Deficient Silver Isotopes Probe the Robustness of the N=50 Shell Closure (2024) Ge, Zhuang; et al.; A1; OA
- High-precision measurement of the atomic mass of 84Sr and implications to isotope shift studies (2024) Ge, Zhuang; et al.; A1; OA
- High-precision measurements of the atomic mass and electron-capture decay Q value of 95Tc (2024) Ge, Zhuang; et al.; A1; OA
- Nuclear Reaction Studies and Prospects for the New MARA-LEB Facility (2023) Romero, J.; et al.; A4; OA
- Offline commissioning of a new gas cell for the MARA Low-Energy Branch (2023) Zadvornaya, A.; et al.; A1; OA
- β− decay Q-value measurement of 136Cs and its implications for neutrino studies (2023) Ge, Z.; et al.; A1; OA
