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Ion yields in HIGISOL experiments based on JYFLTRAP data and PACE4 simulations : based on JYFLTRAP data and PACE4 simulations
The purpose of this thesis was to calculate ion yields in the neutron-deficient mass region A=78-111 in heavy-ion ion-guide experiments at the Ion Guide Isotope Separator On-Line (IGISOL) facility in the Accelerator Laboratory of the University of Jyväskylä. The biggest challenge was that the experiments were not designed for yield calculations but for precision mass measurements. Therefore, only a small fraction of the available data could be used. The results were compared to theoretical cross sections calculated with PACE4 code. Ion yields agreed roughly with the cross-section calculations: On the one hand, the ions with the highest cross sections were detected. On the other hand, ratios between calculated cross sections and measured ion rates differed in some cases even within the same file. Cross sections for measured isotopes were in general more than 1 mb. Stable isotopes, which are used for calibration and reference purposes, were detected although no calculated cross section existed. Finally, some cross-section calculations were performed in order to find reasonable beam, target and energy combinations for future measurements. Main focus was on extending the JYFLTRAP measurements in the neutron-deficient A=78-111 region. Masses of some nuclei are already known with a precision which will be difficult to beat. For many of the nuclei of interest the calculated cross sections were found to be too small in order to safely evaluate whether measuring would succeed or not. Based on PACE4 calculations, the most promising candidates for future measurements are for example 79Y, 81Zr, 82Zr, 83Nb, 84Nb, 96-98Ag, 100In and 101In. ...
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Nuclear fission studies with the IGISOL method and JYFLTRAP Gorelov, Dmitry (University of Jyväskylä, 2015)there is no unique model or theory which describes all aspects of this phenomenon. Experimental measurements of nuclear fission product distributions still remains quite a challenging task for modern technologies. In ...
Fission studies at IGISOL/JYFLTRAP: Simulations of the ion guide for neutron-induced fission and comparison with experimental data Gao, Z.; Solders, A.; Al-Adili, A.; Canete, Laetitia; Eronen, Tommi; Jokinen, A.; Kankainen, Anu; Lantz, M.; Mattera, A.; Moore, Iain; Nesterenko, Dmitrii; Penttilä, Heikki; Pohjalainen, Ilkka; Rakopoulos, V.; Rinta-Antila, Sami; Vilén, Markus; Pomp, S. (EDP Sciences, 2020)For the production of exotic nuclei at the IGISOL facility, an ion guide for neutron-induced fission has been developed and tested in experiments. Fission fragments are produced inside the ion guide and collected using a ...
A neutron source for IGISOL-JYFLTRAP : Design and characterisation Mattera, A.; Pomp, S.; Lantz, M.; Rakopoulos, V.; Solders, A.; Al-Adili, A.; Passoth, E.; Prokofiev, A. V.; Andersson, P.; Hjalmarsson, A.; Bedogni, R.; Bortot, D.; Esposito, A.; Gentile, A.; Gómez-Ros, J. M.; Introini, M. V.; Pola, A.; Gorelov, Dmitry; Penttilä, Heikki; Moore, Iain; Rinta-Antila, Sami; Kolhinen, Veli; Eronen, Tommi (Springer Berlin Heidelberg, 2017)A white neutron source based on the Be(p, nx) reaction for fission studies at the IGISOL-JYFLTRAP facility has been designed and tested. 30MeV protons impinge on a 5mm thick water-cooled beryllium disc. The source was ...
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First experiment with the NUSTAR/FAIR Decay Total Absorption γ-Ray Spectrometer (DTAS) at the IGISOL IV facility Guadilla, V.; Algora, A.; Tain, J.L.; Agramunt, J.; Äystö, Juha; Briz, A.; Cano-Ott, D.; Cucoanes, A.; Eronen, Tommi; Estienne, M.; Faillot, M.; Fraile, L.M.; Ganioglu, E.; Gelletly, W.; Gorelov, Dmitry; Hakala, Jani; Jokinen, Ari; Jordan, D.; Kankainen, Anu; Kolhinen, Veli; Koponen, Jukka; Lebois, M.; Martinez, T.; Monserrate, M.; Montaner-Pizá, A.; Moore, Iain; Nácher, E.; Orrigo, S.; Penttilä, Heikki; Podolyak, Zs.; Pohjalainen, Ilkka; Porta, A.; Regan, P.; Reinikainen, Juuso; Reponen, Mikael; Rinta-Antila, Sami; Rubio, B.; Rytkönen, Kari; Shiba, T.; Sonnenschein, Volker; Sonzogni, A.A.; Valencia, E.; Vedia, V.; Voss, Annika; Wilson, J.N.; Zakari-Issoufou, A.-A. (Elsevier B.V., 2016)The new Decay Total Absorption Spectrometer (DTAS) has been commissioned with low energy radioactive beams at the upgraded IGISOL IV facility. The DTAS is a segmented detector composed of up to 18 NaI(Tl) crystals and ...