Article
Instruments & Instrumentation
A. Zadvornaya, J. Romero, T. Eronen, W. Gins, A. Kankainen, I. D. Moore, P. Papadakis, I. Pohjalainen, M. Reponen, S. Rinta-Antila, J. Saren, D. Simonovski, J. Uusitalo
Summary: Results of offline commissioning tests for a new dedicated gas cell for the Mass Analyzing Recoil Apparatus (MARA) Low-Energy Branch are reported. The tests characterized the evacuation time, ion survival, and transport efficiency in helium buffer gas using a radioactive 223Ra α-recoil source. The suitability of the gas cell for future in-gas laser spectroscopy studies of exotic nuclei was demonstrated.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Multidisciplinary Sciences
Piet Van Isacker, Alejandro Algora, Andras Vitez-Sveiczer, Gabor Gyula Kiss, Sonja Elena Agata Orrigo, Berta Rubio, Pablo Aguilera
Summary: This study reports on recent experimental results on beta decay into self-conjugate nuclei with mass number 58 <= A <= 70. The restoration of pseudo-SU(4) symmetry is observed when A = 70.
Proceedings Paper
Nuclear Science & Technology
Zhihao Gao, Andreas Solders, Ali Al-Adili, Simone Cannarozzo, Mattias Lantz, Heikki Penttila, Stephan Pomp
Summary: Measurements of independent fission yields in neutron-induced fission are crucial for our understanding of the fission process and reactor physics. A simulation model was developed and benchmarked to investigate the low yield of fission products in the current measurement setup. The simulation results suggested changes to the ion guide design, resulting in a five-fold increase in yield. However, further improvements are needed to achieve sufficient intensity for reasonable measurement times.
15TH INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, ND2022
(2023)
Article
Physics, Nuclear
E. Rey-herme, A. Raggio, M. Vandebrouck, I. Moore, I. Pohjalainen, C. Delafosse, R. de Groote, S. Geldhof, Z. Ge, M. Hukkanen, A. Kankainen, A. Koszorus, D. Nesterenko, J. Saren, B. Sulignano, Ch. Theisen, D. Thisse, A. P. Weaver
Summary: 225Pa and 221Ac were produced and studied at the IGISOL facility using different spectroscopic techniques. The level scheme of 221Ac and its daughter nucleus 217Fr were reconstructed. The interpretation of 221Ac levels as parity-doublet bands suggests a static reflection asymmetric shape for this nucleus.
Article
Physics, Nuclear
Z. Gao, A. Solders, A. Al-Adili, O. Beliuskina, T. Eronen, A. Kankainen, M. Lantz, I. D. Moore, D. A. Nesterenko, H. Penttila, S. Pomp, H. Sjostrand, IGISOL Team
Summary: The Phase-Imaging Ion-Cyclotron-Resonance technique was used to measure isomeric yield-ratios in fission by projecting ion motions onto a position-sensitive micro channel plate detector. A new analysis procedure was developed to determine the number of detected ions in each state, and corrections for detector efficiency and decay losses were applied. A Bayesian Gaussian Mixture model was implemented to calculate the population of states with small mass differences. The efficiency of the detector was calibrated and an efficiency function was constructed to correct the recorded distributions.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Physics, Nuclear
M. Hukkanen, W. Ryssens, P. Ascher, M. Bender, T. Eronen, S. Grevy, A. Kankainen, M. Stryjczyk, L. Al Ayoubi, S. Ayet, O. Beliuskina, C. Delafosse, W. Gins, M. Gerbaux, A. Husson, A. Jokinen, D. A. Nesterenko, I. Pohjalainen, M. Reponen, S. Rinta-Antila, A. De Roubin, A. P. Weaver
Summary: Precision mass measurements of neutron-rich rhodium isotopes have been conducted at the JYFLTRAP Penning trap mass spectrometer at the IGISOL facility. The study reports on the masses of ground and isomeric states in Rh-110, Rh-112, Rh-114, Rh-116, Rh-118, and Rh-120. The phase-imaging ion-cyclotron-resonance (PI-ICR) technique was used to separate and measure the isomeric states for the first time.
Proceedings Paper
Physics, Multidisciplinary
V. Guadilla, A. Algora, M. Fallot, J. L. Tain, J. Agramunt, J. Aysto, J. A. Briz, A. Cucoanes, T. Eronen, M. Estienne, L. M. Fraile, E. Ganioglu, W. Gelletly, D. Gorelov, J. Hakala, A. Jokinen, D. Jordan, A. Kankainen, V. Kolhinen, J. Koponen, M. Lebois, L. Le Meur, T. Martinez, M. Monserrate, A. Montaner-Piza, I. Moore, E. Nacher, S. E. A. Orrigo, H. Penttila, I. Pohjalainen, A. Porta, J. Reinikainen, M. Reponen, S. Rinta-Antila, B. Rubio, K. Rytkonen, T. Shiba, V. Sonnenschein, A. A. Sonzogni, E. Valencia, V. Vedia, A. Voss, J. N. Wilson, A. -A. Zakari-Issoufou
Summary: This paper summarizes the experimental results of measuring the super-radiation decay of fission fragments using the Decay Total Absorption-ray Spectrometer, and introduces the advanced methods used in this study.
ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT
(2023)
Article
Astronomy & Astrophysics
K. Wimmer, P. Ruotsalainen, S. M. Lenzi, A. Poves, T. Huyuk, F. Browne, P. Doornenbal, T. Koiwai, T. Arici, K. Auranen, M. A. Bentley, M. L. Cortes, C. Delafosse, T. Eronen, Z. Ge, T. Grahn, P. T. Greenlees, A. Illana, N. Imai, H. Joukainen, R. Julin, A. Jungclaus, H. Jutila, A. Kankainen, N. Kitamura, B. Longfellow, J. Louko, R. Lozeva, M. Luoma, B. Mauss, D. R. Napoli, M. Niikura, J. Ojala, J. Pakarinen, X. Pereira-Lopez, P. Rahkila, F. Recchia, M. Sandzelius, J. Saren, R. Taniuchi, H. Tann, S. Uthayakumaar, J. Uusitalo, V. Vaquero, R. Wadsworth, G. Zimba, R. Yajzey
Summary: Excited states in Ga-62 and Ge-62 nuclei with Tz = 0, -1 were studied using direct reactions and fusion-evaporation reactions. New excited states were discovered and compared with theoretical predictions. In addition, the relationship between mirror and triplet energy differences was analyzed.
Article
Physics, Nuclear
D. A. Nesterenko, J. Ruotsalainen, M. Stryjczyk, A. Kankainen, L. Al Ayoubi, O. Beliuskina, P. Delahaye, T. Eronen, M. Flayol, Z. Ge, W. Gins, M. Hukkanen, A. Jaries, D. Kahl, D. Kumar, S. Nikas, A. Ortiz-Cortes, H. Penttilae, D. Pitman-Weymouth, A. Raggio, M. Ramalho, M. Reponen, S. Rinta-Antila, J. Romero, A. de Roubin, P. C. Srivastava, J. Suhonen, V. Virtanen, A. Zadvornaya
Summary: Neutron-rich 120-124In isotopes were studied to explore different states and excitation energies. Experimental results were compared with theoretical calculations.
