Penning-trap mass spectrometry: commissioning of PIPERADE and measurements of neutron-rich A = 100-120 nuclei at JYFLTRAP
Julkaistu sarjassa
JYU dissertationsTekijät
Päivämäärä
2023Tekijänoikeudet
© The Author & University of Jyväskylä
Penning-trap mass spectrometry allows to measure masses of atomic nuclei with
a very high precision. Nuclear binding energies, determined from the atomic
masses, are used to study the structure of exotic nuclei, and are also key inputs for
nucleosynthesis models. In this thesis, two Penning traps have been utilized. The
PIPERADE (PIèges de PEnning pour les RAdionucléides à DESIR) double Penning
trap was commissioned at the LP2i Bordeaux. The results from the first trapping
of ions, the implementation of the buffer gas cooling technique, a method
to select the ions of interest, all the way to the results of the first time-of-flight
ion-cyclotron-resonance (TOF-ICR) mass measurement, are reported. PIPERADE
will be dedicated to precision mass measurements and ion of interest selection in
the new research facility DESIR (Désintégration, Excitation et Stockage d’Ions Radioactifs)
at the GANIL (Grand Accélérateur National d’Ions Lourds) Accelerator
laboratory.
The JYFLTRAP double Penning trap was utilized at the Ion Guide Isotope
Separator On-Line (IGISOL) facility of the Accelerator Laboratory of University
of Jyväskylä to perform precision mass measurements of neutron-rich rhodium,
ruthenium, molybdenum, niobium, zirconium and yttrium isotopes in the mass
region A ≈ 100 − 120. In total 15 ground- and eight isomeric-state masses were
measured. Altogether eight masses were determined for the first time, while
for the rest the precision of the atomic mass was improved significantly. The
phase-imaging ion-cyclotron-resonance technique (PI-ICR) allowed for the first
time the separation of the isomeric states from the ground states, and precision
mass measurement of each state independently. The most exotic rhodium,
ruthenium, molybdenum and niobium isotopes were measured using the TOFICR
technique. In addition, the half-lives of the ground and isomeric states of
112Rh were measured. From the measured masses, several observables, such as
the two-neutron separation energies, were extracted and compared to the values
predicted by the Hartree-Fock-Bogoliubov based global mass models BSkG1 and
BSkG2. The impact of the new mass values on the neutron-capture rates needed
for the astrophysical rapid neutron capture process was also studied.
Keywords: Penning trap, PIPERADE, JYFLTRAP, isomers, nuclear structure.
Julkaisija
Jyväskylän yliopistoISBN
978-951-39-9676-5ISSN Hae Julkaisufoorumista
2489-9003Julkaisuun sisältyy osajulkaisuja
- Artikkeli I: Hukkanen, M., Ryssens, W., Ascher, P., Bender, M., Eronen, T., Grévy, S., Kankainen, A., Stryjczyk, M., Al Ayoubi, L., Ayet, S., Beliuskina, O., Delafosse, C., Gins, W., Gerbaux, M., Husson, A., Jokinen, A., Nesterenko, D. A., Pohjalainen, I., Reponen, M., . . . Weaver, A. P. (2023). Odd-odd neutron-rich rhodium isotopes studied with the double Penning trap JYFLTRAP. Physical Review C, 107(1), Article 014306. DOI: 10.1103/PhysRevC.107.014306. JYX: jyx.jyu.fi/handle/123456789/85330
- Artikkeli II: Hukkanen, M., Ryssens, W., Ascher, P., Bender, M., Eronen, T., Grévy, S., Kankainen, A., Stryjczyk, M., Al Ayoubi, L., Ayet, S., Beliuskina, O., Delafosse, C., Ge, Z., Gerbaux, M., Gins, W., Husson, A., Jaries, S. Kujanpää, M. Mougeot, D. A. Nesterenko, A., Nikas, S., Penttilä, H., Pohjalainen, I., Raggio, A., Reponen, M., Rinta-Antila, S., de Roubin, A., Ruotsalainen, J., Virtanen, V. and Weaver, A. P. Binding energies of ground and isomeric states in neutron-rich Ru isotopes: measurements at JYFLTRAP and comparison to theory. Submitted to Physical Review C.
- Artikkeli III: Ascher, P., Daudin, L., Flayol, M., Gerbaux, M., Grévy, S., Hukkanen, M., Husson, A., Roubin, A. D., Alfaurt, P., Blank, B., Blaum, K., Lachacinski, B., Lunney, D., Minaya Ramirez, E., Naimi, S., Perard, S., & Thomas, B. (2021). PIPERADE : A double Penning trap for mass separation and mass spectrometry at DESIR/SPIRAL2. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 1019, Article 165857. DOI: 10.1016/j.nima.2021.165857
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