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- Title
Advancing Radiation-Detected Resonance Ionization towards Heavier Elements and More Exotic Nuclides.
- Authors
Warbinek, Jessica; Anđelić, Brankica; Block, Michael; Chhetri, Premaditya; Claessens, Arno; Ferrer, Rafael; Giacoppo, Francesca; Kaleja, Oliver; Kieck, Tom; Kim, EunKang; Laatiaoui, Mustapha; Lantis, Jeremy; Mistry, Andrew; Münzberg, Danny; Nothhelfer, Steven; Raeder, Sebastian; Rey-Herme, Emmanuel; Rickert, Elisabeth; Romans, Jekabs; Romero-Romero, Elisa
- Abstract
RAdiation-Detected Resonance Ionization Spectroscopy (RADRIS) is a versatile method for highly sensitive laser spectroscopy studies of the heaviest actinides. Most of these nuclides need to be produced at accelerator facilities in fusion-evaporation reactions and are studied immediately after their production and separation from the primary beam due to their short half-lives and low production rates of only a few atoms per second or less. Only recently, the first laser spectroscopic investigation of nobelium ( Z = 102 ) was performed by applying the RADRIS technique in a buffer-gas-filled stopping cell at the GSI in Darmstadt, Germany. To expand this technique to other nobelium isotopes and for the search for atomic levels in the heaviest actinide element, lawrencium ( Z = 103 ), the sensitivity of the RADRIS setup needed to be further improved. Therefore, a new movable double-detector setup was developed, which enhances the overall efficiency by approximately 65% compared to the previously used single-detector setup. Further development work was performed to enable the study of longer-lived (t 1 / 2 > 1 h) and shorter-lived nuclides (t 1 / 2 < 1 s) with the RADRIS method. With a new rotatable multi-detector design, the long-lived isotope 254 Fm (t 1 / 2 = 3.2 h ) becomes within reach for laser spectroscopy. Upcoming experiments will also tackle the short-lived isotope 251 No (t 1 / 2 = 0.8 s ) by applying a newly implemented short RADRIS measurement cycle.
- Subjects
DARMSTADT (Germany); HEAVY elements; HEAVY ion fusion reactions; NUCLIDES; LASER spectroscopy; RESONANCE ionization spectroscopy; ACTINIDE elements; RESONANCE; ACCELERATOR mass spectrometry
- Publication
Atoms (2218-2004), 2022, Vol 10, Issue 2, p41
- ISSN
2218-2004
- Publication type
Article
- DOI
10.3390/atoms10020041