University of Groningen
Direct mass measurements of No, Lr and Rf isotopes with SHIPTRAP and developments for
chemical isobaric separation
Anđelić, Brankica
DOI:
10.33612/diss.173546003
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Publication date: 2021
Link to publication in University of Groningen/UMCG research database
Citation for published version (APA):
Anđelić, B. (2021). Direct mass measurements of No, Lr and Rf isotopes with SHIPTRAP and developments for chemical isobaric separation. University of Groningen.
https://doi.org/10.33612/diss.173546003
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Propositions
belonging to the Ph.D. thesisDirect mass measurements of No, Lr and Rf isotopes with SHIPTRAP
and developments for chemical isobaric separation
Brankica Anđelić
1. The mass of the atomic nucleus is one of its basic properties which must be known in the investigation of nuclear shell structure and astrophysical processes related e.g., to nucleosynthesis processes.
2. The most important requirements for high-precision Penning-trap mass measurements of radioisotopes with low yields are high overall efficiency, low background and stable operation over long measurement times.
3. Nuclear models predict different locations for the center of the island of stability. High-precision mass measurements of the heaviest elements provide key parameters, such as the two-neutron shell gap, which allow us to benchmark these models.
4. Due to its high mass-resolving power, high precision and high accuracy, the Phase-Imaging Ion-Cyclotron Resonance Technique (PI-ICR) enables us to determine the excitation energy of long-lived, low-lying isomeric states by mass spectrometry, which makes it a powerful and complementary tool to decay spectroscopy.
5. Presently, the main challenge for a high-precision mass measurements of 100Sn at SHIPTRAP is the separation from isobaric contaminants. A potential solution is to employ a novel ion-chemical separation technique within a gas catcher.
6. It is up to scientists to ensure that benefits of their research outweigh used resources in the long run.
7. Studies have established a high percentage of mental health problems among Ph.D. students. The academic community must not ignore such a serious problem. 8. The majority of Ph.D. students develop their careers outside academia. Ph.D. students should be encouraged to explore different fields and to develop skills that are not strictly related to their Ph.D. project during their graduate studies.
9. Decision-making based on reliable statistics is often crucial for proper social, economic and environmental development.
