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1. Statistical properties and photon strength functions of the ${}^{112,114}$Sn isotopes below the neutron separation threshold

Author

Söderström, P. -A., Markova, M., Tsoneva, N., Xu, Y., Kuşoğlu, A., Aogaki, S., Balabanski, D. L., Ban, S. R., Borcea, R., Brezeanu, M., Camera, F., Ciemała, M., Ciocan, Gh., Clisu, C., Costache, C., Crespi, F. C. L., Cuciuc, M., Dhal, A., Dinescu, I., Florea, N. M., Giaz, A., Kmiecik, M., Lelasseux, V., Lica, R., Mărginean, N. M., Mihai, C., Mihai, R. E., Nichita, D., Pai, H., Pârlea, I. P., Petruse, T., Rotaru, A., Sotty, C. O., Spătaru, A., Stan, L., Testov, D. A., Tofan, D., Toma, S., Tozar, T., Turturică, A., Turturică, G. V., Ujeniuc, S., Ur, C. A., and Wieland, O.

Subjects
Nuclear Experiment
Abstract

Here, we report on the measurements of the $\gamma$-ray strength functions and nuclear level densities of ${}^{112,114}$Sn performed for the first time at the 9~MV Tandem accelerator facilities at IFIN-HH using the Oslo method. We extract thermodynamic properties and gross and fine properties of the pygmy dipole resonance for systematic comparison in the chain of Sn isotopes. The results are compared with microscopic models implemented in the TALYS reaction code and the fully microscopic quasiparticle-phonon model for the underlying nuclear structure of the dipole strength in ${}^{112,114}$Sn. The quasiparticle-phonon model results show the importance of complex configurations to the low-energy dipole response in the pygmy dipole resonance energy region. The experimental data are further included in the cross-section and reaction rate calculations for the $(\mathrm{n},\gamma)$ reaction of the $p$-process nuclei ${}^{112,114}$Sn showing a significant increase in reaction rates at high temperatures compared to existing nuclear databases., Comment: 21 pages, 17 figures

Published
2024

2. Simultaneous $\gamma$-ray and electron spectroscopy of $^{182,184,186}$Hg isotopes

Author

Stryjczyk, M., Andel, B., Cubiss, J. G., Rezynkina, K., Rodríguez, T. R., García-Ramos, J. E., Andreyev, A. N., Pakarinen, J., Van Duppen, P., Antalic, S., Berry, T., Borge, M. J. G., Clisu, C., Cox, D. M., De Witte, H., Fraile, L. M., Fynbo, H. O. U., Gaffney, L. P., Harkness-Brennan, L. J., Huyse, M., Illana, A., Judson, D. S., Konki, J., Kurcewicz, J., Lazarus, I., Lica, R., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mosat, P., Nacher, E., Negret, A., Ojala, J., Ovejas, J. D., Page, R. D., Papadakis, P., Pascu, S., Perea, A., Podolyák, Zs., Próchniak, L., Pucknell, V., Rapisarda, E., Rotaru, F., Sotty, C., Tengblad, O., Vedia, V., Viñals, S., Wadsworth, R., Warr, N., and Wrzosek-Lipska, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Background: The mercury isotopes around $N=104$ are a well-known example of nuclei exhibiting shape coexistence. Mixing of configurations can be studied by measuring the monopole strength $\rho^2(E0)$, however, currently the experimental information is scarce and lacks precision, especially for the $I^\pi \rightarrow I^\pi$ ($I \neq 0$) transitions. Purpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in $^{182,184,186}$Hg and to interpret the results in the framework of shape coexistence using different models. Method: The low-energy structures in $^{182,184,186}$Hg were populated in the $\beta$ decay of $^{182,184,186}$Tl, produced at ISOLDE and purified by laser ionization and mass separation. The $\gamma$-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes. Results: In total, 193, 178 and 156 transitions, including 144, 140 and 108 observed for the first time in a $\beta$-decay experiment, were assigned to $^{182,184,186}$Hg, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an $E0$ component. Extracted branching ratios allowed the sign of the interference term in $^{182}$Hg as well as $\rho^2(E0;0^+_2\rightarrow 0^+_1)$ and $B(E2;0^+_2\rightarrow 2^+_1)$ in $^{184}$Hg to be determined. By means of electron-electron coincidences, the $0^+_3$ state was identified in $^{184}$Hg. The experimental results were qualitatively reproduced by five theoretical approaches, the IBM with configuration mixing with two different parametrizations, the General Bohr Hamiltonian, the BMF model and the SCCM model. However, a quantitative description is lacking., Comment: 21 pages, 30 figures, accepted for publication in Physical Review C

Published
2023
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3. Shape transitions between and within Zr isotopes

Author

Werner V., Witt W., Beck T., Pietralla N., Boromiza M., Clisu C., Costache C., Dinescu I.E., Ionescu A., John P.R., Koseoglou P., Margineăn N., Margineăn R., Mihai C., Mihai R.E., Mitu A., Negret A., Nita C.R., Olacel A., Pascu S., Serban A., Sotty C., Stan L., Suvaila R., Toma S., Turturica A., Ujeniuc S., and Wiederhold J.

Subjects
Physics, QC1-999
Abstract

The Zirconium isotopes across the N=56,58 neutron sub­shell closures have been of special interest since years, sparked by the near doubly-magic features of 96Zr and the subsequent rapid onset of collectivity with a deformed ground-state structure already in 100Zr. Recent state-of-the-art shell model approaches did not only correctly describe this shape-phase transition in the Zr isotopic chain, but alsothe coexistence of non-collective structures and pronounced collectivity especially in 96,98Zr. Theisotope 98Zr is located on the transition from spherical to deformed ground state structures. We summarize recent experimental work to obtain the B(E2) excitation strengths of the first 2+ state of98Zr, including a new experiment employing the recoil-distance Doppler-shift method following a two-neutron transfer reaction.

Published
2019
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4. Shape Coexistence at Zero Spin in 64Ni Driven by the Monopole Tensor Interaction

Author

Mărginean, N., Little, D., Tsunoda, Y., Leoni, S., Janssens, R. V. F., Fornal, B., Otsuka, T., Michelagnoli, C., Stan, L., Crespi, F. C. L., Costache, C., Lica, R., Sferrazza, M., Turturica, A., Ayangeakaa, A. D., Auranen, K., Barani, M., Bender, P. C., Bottoni, S., Boromiza, M., Bracco, A., Călinescu, S., Campbell, C. M., Carpenter, M. P., Chowdhury, P., Ciemała, M., Cieplicka-Orynczak, N., Cline, D., Clisu, C., Crawford, H. L., Dinescu, I. E., Filipescu, D., Florea, N., Forney, A. M., Fracassetti, S., Gade, A., Gheorghe, I., Hayes, A. B., Harca, I., Henderson, J., Ionescu, A., Iskra, Ł. W., Jentschel, M., Kandzia, F., Kim, Y. H., Kondev, F. G., Korschinek, G., Köster, U., Krishichayan, Krzysiek, M., Lauritsen, T., Li, J., Mărginean, R., Maugeri, E. A., Mihai, C., Mihai, R. E., Mitu, A., Mutti, P., Negret, A., Niţă, C. R., Olăcel, A., Oprea, A., Pascu, S., Petrone, C., Porzio, C., Rhodes, D., Seweryniak, D., Schumann, D., Sotty, C., Stolze, S. M., Şuvăilă, R., Toma, S., Ujeniuc, S., Walters, W. B., Wu, C. Y., Wu, J., Zhu, S., and Ziliani, S.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The low-spin structure of the semimagic 64Ni nucleus has been considerably expanded: combining four experiments, several 0+ and 2+ excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes: a prolate 0+ excitation is located at a surprisingly high energy (3463 keV), with a collective 2+ state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N = 40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N.

Published
2020
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5. Decay studies of the long-lived states in $^{186}$Tl

Author

Stryjczyk, M., Andel, B., Andreyev, A. N., Cubiss, J., Pakarinen, J., Rezynkina, K., Van Duppen, P., Antalic, S., Berry, T., Borge, M. J. G., Clisu, C., Cox, D. M., De Witte, H., Fraile, L. M., Fynbo, H. O. U., Gaffney, L. P., Harkness-Brennan, L. J., Huyse, M., Illana, A., Judson, D. S., Konki, J., Kurcewicz, J., Lazarus, I., Lica, R., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mosat, P., Nacher, E., Negret, A., Ojala, J., Ovejas, J. D., Page, R. D., Papadakis, P., Pascu, S., Perea, A., Podolyák, Zs., Pucknell, V., Rapisarda, E., Rotaru, F., Sotty, Ch., Tengblad, O., Vedia, V., Viñals, S., Wadsworth, R., Warr, N., and Wrzosek-Lipska, K.

Subjects
Nuclear Experiment
Abstract

Decay spectroscopy of the long-lived states in $^{186}$Tl has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The $\alpha$ decay from the low-spin $(2^-)$ state in $^{186}$Tl was observed for the first time and a half-life of $3.4^{+0.5}_{-0.4}$ s was determined. Based on the $\alpha$-decay energy, the relative positions of the long-lived states were fixed, with the $(2^-)$ state as the ground state, the $7^{(+)}$ state at 77(56)~keV and the $10^{(-)}$ state at 451(56) keV. The level scheme of the internal decay of the $^{186}$Tl($10^{(-)}$) state ($T_{1/2} = 3.40(9)$ s), which was known to decay solely through emission of 374 keV $\gamma$-ray transition, was extended and a lower-limit for the $\beta$-decay branching $b_\beta > 5.9(3)\%$ was determined. The extracted retardation factors for the $\gamma$ decay of the $10^{(-)}$ state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the $\pi d_{3/2}$ shell in the isomeric decay and significant structure differences between $^{184}$Tl and $^{186}$Tl., Comment: 10 pages, 12 figures

Published
2020
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6. M4 resonnaces in light nuclei studied at CCB

Author

Cieplicka-Oryńczak, N., Fornal, B., Ciemała, M., Kmiecik, Maria, Maj, Adam, Lukasik, J., Pawłowski, P., Sowicki, B., Wasilewska, B., Zieblinski, M., Bednarczyk, P., Ciepal, I., Dhanmeher, K., Grebosz, J, Iskra, L.W, Krzysiek, M., Matejska-Minda, M., Mazurek, Katarzyna, Parol, W., Wloch, B., Boiano, C., Brambilla, S., Million, B., Jaganathen, Y., Ploszajczak, M., Burducea, I., Clisu, C., Florea, N, Iancu, D.A., Mărginean, N., Marginean, R, Stan, L, Harakeh, M.N., Kulessa, P., Matea, I., Sferrazza, Michele, Cieplicka-Oryńczak, N., Fornal, B., Ciemała, M., Kmiecik, Maria, Maj, Adam, Lukasik, J., Pawłowski, P., Sowicki, B., Wasilewska, B., Zieblinski, M., Bednarczyk, P., Ciepal, I., Dhanmeher, K., Grebosz, J, Iskra, L.W, Krzysiek, M., Matejska-Minda, M., Mazurek, Katarzyna, Parol, W., Wloch, B., Boiano, C., Brambilla, S., Million, B., Jaganathen, Y., Ploszajczak, M., Burducea, I., Clisu, C., Florea, N, Iancu, D.A., Mărginean, N., Marginean, R, Stan, L, Harakeh, M.N., Kulessa, P., Matea, I., and Sferrazza, Michele

Abstract

info:eu-repo/semantics/published

Published
2023

7. M4 Resonances in Light Nuclei Studied at CCB

Author

Cieplicka-Oryńczak, N., primary, Fornal, B., additional, Ciemała, M., additional, Kmiecik, M., additional, Maj, A., additional, Łukasik, J., additional, Pawłowski, P., additional, Sowicki, B., additional, Wasilewska, B., additional, Ziębliński, M., additional, Bednarczyk, P., additional, Ciepał, I., additional, Dhanmeher, K., additional, Grębosz, J., additional, Iskra, Ł.W., additional, Krzysiek, M., additional, Matejska-Minda, M., additional, Mazurek, K., additional, Parol, W., additional, Włoch, B., additional, Boiano, C., additional, Brambilla, S., additional, Million, B., additional, Jaganathen, Y., additional, Płoszajczak, M., additional, Burducea, I., additional, Clisu, C., additional, Florea, N., additional, Iancu, D.A., additional, Marginean, N., additional, Marginean, R., additional, Stan, L., additional, Harakeh, M.N., additional, Kulessa, P., additional, Matea, I., additional, and Sferrazza, M., additional

Published
2023
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8. The decay of the 21.47-MeV stretched resonance in ¹³C: A precise probe of the open nuclear quantum system description [The decay of the 21.47-MeV stretched resonance in C-13: A precise probe of the open nuclear quantum system description]

Author

Cieplicka-Orynczak, N., Jaganathen, Y., Fornal, B., Leoni, S., Ploszajczak, M., Ciemala, M., Ziliani, S., Kmiecik, M., Maj, A., Lukasik, J., Pawlowski, P., Sowicki, B., Wasilewska, B., Zieblinski, M., Bednarczyk, P., Boiano, C., Bottoni, S., Bracco, A., Brambilla, S., Burducea, I., Camera, F., Ciepal, I., Clisu, C., Crespi, F., Dhanmeher, K., Florea, N., Gamba, E., Grebosz, J., Harakeh, M., Iancu, D., Iskra, L., Krzysiek, M., Kulessa, P., Marginean, N., Marginean, R., Matea, I., Matejska-Minda, M., Mazurek, K., Million, B., Parol, W., Sferrazza, M., Stan, L., and Wloch, B.

Subjects
C-13, Gamow Shell Model, Nuclear structure, Stretched resonance states, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2022

9. The decay of the 21.47-MeV stretched resonance in C: A precise probe of the open nuclear quantum system description

Author

Cieplicka-Oryńczak, N., Jaganathen, Y., Fornal, B., Leoni, S., Płoszajczak, M., Ciemała, M., Ziliani, S., Kmiecik, M., Maj, A., Łukasik, J., Pawłowski, P., Sowicki, B., Wasilewska, B., Ziębliński, M., Bednarczyk, P., Boiano, C., Bottoni, S., Bracco, A., Brambilla, S., Burducea, I., Camera, F., Ciepał, I., Clisu, C., Crespi, F.C.L., Dhanmeher, K., Florea, N., Gamba, E., Grębosz, J., Harakeh, M.N., Iancu, D.A., Iskra, Ł.W., Krzysiek, M., Kulessa, P., Marginean, N., Marginean, R., Matea, I., Matejska-Minda, M., Mazurek, K., Million, B., Parol, W., Sferrazza, M., Stan, L., and Włoch, B.

Abstract

The decay of the 21.47-MeV stretched resonance in $^{13}$C, arising from p3/2→d5/2 nucleon excitation coupled to maximum spin, was investigated in a (p,p′) experiment at 135 MeV proton bombarding energy, performed at the Cyclotron Centre Bronowice (CCB) at IFJ PAN in Krakow. First experimental information on the proton and neutron decay branches from this state was obtained by using coincidence measurement of protons inelastically scattered on a $^{13}$C target and γ rays from daughter nuclei, namely, $^{12}$B (proton decay) and $^{12}$C (neutron decay). The main branches lead to the Jπ=2+, first-excited state at 0.953 MeV in $^{12}$B, and to the Jπ=1+, T=1 level at 15.110 MeV in $^{12}$C. The results were compared with predictions from the Gamow Shell Model (GSM), which was used to describe the stretched resonance in terms of its energy, width, electromagnetic transition strengths and decay pattern. A very good agreement was obtained between the measured and calculated properties of the 21.47-MeV stretched resonance in $^{13}$C, demonstrating the high-quality and precision of the GSM wave function calculations, which include coupling to the resonant and non-resonant particle continuum.

Published
2022

10. The decay of the 21.47-MeV stretched resonance in 13C: A precise probe of the open nuclear quantum system description

Author

Cieplicka-Oryńczak, N., primary, Jaganathen, Y., additional, Fornal, B., additional, Leoni, S., additional, Płoszajczak, M., additional, Ciemała, M., additional, Ziliani, S., additional, Kmiecik, M., additional, Maj, A., additional, Łukasik, J., additional, Pawłowski, P., additional, Sowicki, B., additional, Wasilewska, B., additional, Ziębliński, M., additional, Bednarczyk, P., additional, Boiano, C., additional, Bottoni, S., additional, Bracco, A., additional, Brambilla, S., additional, Burducea, I., additional, Camera, F., additional, Ciepał, I., additional, Clisu, C., additional, Crespi, F.C.L., additional, Dhanmeher, K., additional, Florea, N., additional, Gamba, E., additional, Grębosz, J., additional, Harakeh, M.N., additional, Iancu, D.A., additional, Iskra, Ł.W., additional, Krzysiek, M., additional, Kulessa, P., additional, Marginean, N., additional, Marginean, R., additional, Matea, I., additional, Matejska-Minda, M., additional, Mazurek, K., additional, Million, B., additional, Parol, W., additional, Sferrazza, M., additional, Stan, L., additional, and Włoch, B., additional

Published
2022
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11. Nucleon-induced inelastic cross sections on Ninat

Author

Olacel, A., Borcea, C., Boromiza, M., Calinescu, S., Clisu, C., Costache, C., Dessagne, Ph., Dinescu, I., Filipescu, D., Florea, N., Harca, I., Henning, G., Ionescu, A., Kerveno, M., Lica, R., Matei, A., Mihai, C., Mihai, R., Mitu, A., Negret, A., Nita, C., Nyman, M., Oprea, A., Petrone, C., Plompen, A. J. M., Sotty, C., Stan, L., Stoica, L., Suliman, G., Turturica, A., and Ujeniuc, S.

Published
2022
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12. Search for isospin-symmetry breaking in the A=62 isovector triplet

Author

Mihai, R. E., primary, Mare, A. S., additional, Mărginean, N., additional, Petrovici, A., additional, Andrei, O., additional, Boromiza, M., additional, Bucurescu, D., additional, Căta-Danil, G., additional, Clisu, C., additional, Costache, C., additional, Dinescu, I., additional, Filipescu, D., additional, Florea, N., additional, Gheorghe, I., additional, Ionescu, A., additional, Lică, R., additional, Mărginean, R., additional, Mihai, C., additional, Mitu, A., additional, Negret, A., additional, Niţă, C. R., additional, Olăcel, A., additional, Oprea, A., additional, Pascu, S., additional, Şerban, A., additional, Sotty, C., additional, Stan, L., additional, Şuvăilă, R., additional, Toma, S., additional, Turturică, A., additional, Ujeniuc, S., additional, and Ur, C. A., additional

Published
2022
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13. The decay of the 21.47-MeV stretched resonance in 13C: a precise probe of the open nuclear quantum system description

Author

Cieplicka-Oryńczak, N., Jaganathen, Y., Fornal, B., Leoni, Silvia, Ploszajczak, Marek, Ciemała, M., Ziliani, S., Kmiecik, Maria, Maj, Adam, Lukasik, J., Pawłowski, P., Sowicki, B., Wasilewska, B., Zieblinski, M., Bednarczyk, P., Boiano, C., Bottoni, S., Bracco, Angela, Brambilla, S., Burducea, I., Camera, F., Ciepal, I., Clisu, C., Crespi, Fabio Celso Luigi, Dhanmeher, K., Florea, N, Gamba, E., Grebosz, J, Harakeh, M.N., Iancu, D.A., Iskra, L.W, Krzysiek, M., Kulessa, P., Mărginean, N., Marginean, R, Matea, I., Matejska-Minda, M., Mazurek, Katarzyna, Million, B., Parol, W., Sferrazza, Michele, Stan, Lucian, Wloch, B., Cieplicka-Oryńczak, N., Jaganathen, Y., Fornal, B., Leoni, Silvia, Ploszajczak, Marek, Ciemała, M., Ziliani, S., Kmiecik, Maria, Maj, Adam, Lukasik, J., Pawłowski, P., Sowicki, B., Wasilewska, B., Zieblinski, M., Bednarczyk, P., Boiano, C., Bottoni, S., Bracco, Angela, Brambilla, S., Burducea, I., Camera, F., Ciepal, I., Clisu, C., Crespi, Fabio Celso Luigi, Dhanmeher, K., Florea, N, Gamba, E., Grebosz, J, Harakeh, M.N., Iancu, D.A., Iskra, L.W, Krzysiek, M., Kulessa, P., Mărginean, N., Marginean, R, Matea, I., Matejska-Minda, M., Mazurek, Katarzyna, Million, B., Parol, W., Sferrazza, Michele, Stan, Lucian, and Wloch, B.

Abstract

info:eu-repo/semantics/published

Published
2022

14. New beta-decaying state in Bi-214

Author

Andel, B, Van Duppen, P, Andreyev, AN, Blazhev, A, Grawe, H, Lica, R, Naidja, H, Stryjczyk, M, Algora, A, Antalic, S, Barzakh, A, Benito, J, Benzoni, G, Berry, T, Borge, MJG, Chrysalidis, K, Clisu, C, Costache, C, Cubiss, JG, De Witte, H, Fedorov, DV, Fedosseev, VN, Fraile, LM, Fynbo, HOU, Greenlees, PT, Harkness-Brennan, LJ, Huyse, M, Illana, A, Jolie, J, Judson, DS, Konki, J, Lazarus, I, Madurga, M, Marginean, N, Marginean, R, Mihai, C, Marsh, BA, Molkanov, P, Mosat, P, Murias, JR, Nacher, E, Negret, A, Page, RD, Pascu, S, Perea, A, Pucknell, V, Rahkila, P, Rapisarda, E, Rezynkina, K, Sanchez-Tembleque, V, Schomacker, K, Seliverstov, MD, Sotty, C, Stan, L, Surder, C, Tengblad, O, Vedia, V, Vinals, S, Wadsworth, R, Warr, N, Collaboration, IDS, Research Foundation - Flanders, KU Leuven, Belgian Science Policy Office, European Commission, Science and Technology Facilities Council (UK), Slovak Research and Development Agency, Russian Foundation for Basic Research, Institute of Atomic Physics (Romania), Agencia Estatal de Investigación (España), Federal Ministry of Education and Research (Germany), and Ministerio de Ciencia e Innovación (España)

Subjects
Physics, Science & Technology, 010308 nuclear & particles physics, State (functional analysis), 01 natural sciences, ISOLDE, 3. Good health, Physics, Nuclear, NUCLEAR-DATA SHEETS, Quantum mechanics, 0103 physical sciences, Physical Sciences, SHELL-MODEL, Física nuclear, 010306 general physics
Abstract

13 pags., 7 figs., 3 tabs., A new β-decaying state in Bi214 has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred Iπ=(8-) assignment was suggested for this state based on the β-decay feeding pattern to levels in Po214 and shell-model calculations. The half-life of the Iπ=(8-) state was deduced to be T1/2=9.39(10) min. The deexcitation of the levels populated in Po214 by the β decay of this state was investigated via γ-γ coincidences and a number of new levels and transitions was identified. Shell-model calculations for excited states in Bi214 and Po214 were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new β-decaying state as an Iπ=8- isomer and allow for tentative assignment of shell-model states to several high-spin states in Po214., This work has been supported by the Research Foundation Flanders (FWO, Belgium), by GOA/2015/010 (BOF KU Leuven), the Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office (BriX network P7/12), by the ENSAR2: European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 654002, by the U.K. Science and Technology Facilities Council, by the Slovak Research and Development Agency (Contract No. APVV-18-0268), by the Slovak grant agency VEGA (Contract No. 1/0651/21), by RFBR according to the research project N 19-02-00005, by the Romanian IFA Grant CERN/ISOLDE, by the Spanish Funding Agency (AEI) under the project PID2019-104390GB-I00, by the German BMBF under Grant No. 05P18PKCIA and by the Spanish Ministerio de Ciencia e Innovación grant PID2019-104714GB-C21. M.S. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 771036 (ERC CoG MAIDEN).

Published
2021

15. New ß-decaying state in 214Bi

Author

Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Licifmmode ăelse ă, R., Naïdja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J. G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D. V., Fedosseev, V. N., Fraile, L. M., Fynbo, H. O. U., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V., Rahkila, P., Rapisarda, E., Seliverstov, M. D., and Wadsworth, R.

Published
2021

16. New β-decaying state in 214Bi

Author

Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Licǎ, R., Naïdja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J.G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D. V., Fedosseev, V. N., Fraile, L. M., Fynbo, Hans Otto Uldall, Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V., Rahkila, P., Rapisarda, E., Rezynkina, K., and Sánchez-Tembleque, V.

Abstract

A new β-decaying state in Bi214 has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred Iπ=(8-) assignment was suggested for this state based on the β-decay feeding pattern to levels in Po214 and shell-model calculations. The half-life of the Iπ=(8-) state was deduced to be T1/2=9.39(10) min. The deexcitation of the levels populated in Po214 by the β decay of this state was investigated via γ-γ coincidences and a number of new levels and transitions was identified. Shell-model calculations for excited states in Bi214 and Po214 were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new β-decaying state as an Iπ=8- isomer and allow for tentative assignment of shell-model states to several high-spin states in Po214.

Published
2021
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17. New evidence for alpha clustering structure in the ground state band of Po

Author

von Tresckow, Ma., Rudigier, M., Shneidman, T.M., Kröll, Th., Boromiza, M., Clisu, C., Costache, C., Filipescu, D., Florea, N.M., Gheorghe, I., Gladnishki, K., Ionescu, A., Kocheva, D., Lică, R., Mărginean, N., Mărginean, R., Mashtakov, K.R., Mihai, C., Mihai, R.E., Negret, A., Nita, C.R., Olacel, A., Oprea, A., Pascu, S., Rainovski, G., Sava, T., Scheck, M., Spagnoletti, P., Sotty, C., Stan, L., Stiru, I., Toma, S., Turturică, A., and Ujeniuc, S.

Abstract

Half-lives of the low-lying yrast states of $^{212}$Po have been measured using the delayed coincidence fast-timing method. We report on the first measurement of the 41+ half-life, as well as a new measurement of the 61+ half-life with improved accuracy compared to previous studies. The extracted lifetime of the 41+ and 61+ state have been determined to be 100(14) ps and 1.66(28) ns respectively. With these measurements, precise values are now available for the reduced transition strengths B(E2) of all ground state band levels in $^{212}$Po up to the first 8+ state, in particular B(E2; 41+→21+) = 9.4(13) W.u. and B(E2;61+→41+) = 8.7(15) W.u. Comparison of the new available data with an α-clustering model calculation provides evidence that the inclusion of the α-cluster degree of freedom significantly improves agreement with experimental data compared to earlier shell model calculations.

Published
2021

18. New evidence for alpha clustering structure in the ground state band of 212Po

Author

von Tresckow, Ma., primary, Rudigier, M., additional, Shneidman, T.M., additional, Kröll, Th., additional, Boromiza, M., additional, Clisu, C., additional, Costache, C., additional, Filipescu, D., additional, Florea, N.M., additional, Gheorghe, I., additional, Gladnishki, K., additional, Ionescu, A., additional, Kocheva, D., additional, Lică, R., additional, Mărginean, N., additional, Mărginean, R., additional, Mashtakov, K.R., additional, Mihai, C., additional, Mihai, R.E., additional, Negret, A., additional, Nita, C.R., additional, Olacel, A., additional, Oprea, A., additional, Pascu, S., additional, Rainovski, G., additional, Sava, T., additional, Scheck, M., additional, Spagnoletti, P., additional, Sotty, C., additional, Stan, L., additional, Stiru, I., additional, Toma, S., additional, Turturică, A., additional, and Ujeniuc, S., additional

Published
2021
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19. New $\beta$-decaying state in $^{214}$Bi

Author

Andel, B., Van Duppen, P., Andreyev, A.N., Blazhev, A., Grawe, H., Lică, R., Naïdja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M.J.G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J.G., De Witte, H., Fedorov, D.V., Fedosseev, V.N., Fraile, L.M., Fynbo, H.O.U., Greenlees, P.T., Harkness-Brennan, L.J., Huyse, M., Illana, A., Jolie, J., Judson, D.S., Konki, J., Lazarus, I., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B.A., Molkanov, P., Mosat, P., Murias, J.R., Nacher, E., Negret, A., Page, R.D., Pascu, S., Perea, A., Pucknell, V., Rahkila, P., Rapisarda, E., Rezynkina, K., Sánchez-Tembleque, V., Schomacker, K., Seliverstov, M.D., Sotty, C., Stan, L., Sürder, C., Tengblad, O., Vedia, V., Viñals, S., Wadsworth, R., Warr, N., Institut Laue-Langevin (ILL), ILL, Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and IDS

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Physics - Theory
Abstract

International audience; A new $\beta$-decaying state in $^{214}$Bi has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred $I^{\pi} = (8^-)$ assignment was suggested for this state based on the β-decay feeding pattern to levels in $^{214}$Po and shell-model calculations. The half-life of the $I^{\pi} = (8^-)$ state was deduced to be $T_{1/2} = 9.39(10)$ min. The deexcitation of the levels populated in $^{214}$Po by the $\beta$ decay of this state was investigated via $\gamma - \gamma$ coincidences and a number of new levels and transitions was identified. Shell-model calculations for excited states in $^{214}$Bi and $^{214}$Po were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new β-decaying state as an $I^{\pi} = 8^-$ isomer and allow for tentative assignment of shell-model states to several high-spin states in $^{214}$Po.

Published
2021
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20. Shape Coexistence at Zero Spin in Ni-64 Driven by the Monopole Tensor Interaction

Author

Marginean, N, Little, D, Tsunoda, Y, Leoni, S, Janssens, RVF, Fornal, B, Otsuka, T, Michelagnoli, C, Stan, L, Crespi, FCL, Costache, C, Lica, R, Sferrazza, M, Turturica, A, Ayangeakaa, AD, Auranen, K, Barani, M, Bender, PC, Bottoni, S, Boromiza, M, Bracco, A, Calinescu, S, Campbell, CM, Carpenter, MP, Chowdhury, P, Ciemala, M, Cieplicka-Orynczak, N, Cline, D, Clisu, C, Crawford, HL, Dinescu, IE, Dudouet, J, Filipescu, D, Florea, N, Forney, AM, Fracassetti, S, Gade, A, Gheorghe, I, Hayes, AB, Harca, I, Henderson, J, Ionescu, A, Iskra, LW, Jentschel, M, Kandzia, F, Kim, YH, Kondev, FG, Korschinek, G, Koster, U, Krishichayan, Krzysiek, M, Lauritsen, T, Li, J, Marginean, R, Maugeri, EA, Mihai, C, Mihai, RE, Mitu, A, Mutti, P, Negret, A, Nita, CR, Olacel, A, Oprea, A, Pascu, S, Petrone, C, Porzio, C, Rhodes, D, Seweryniak, D, Schumann, D, Sotty, C, Stolze, SM, Suvaila, R, Toma, S, Ujeniuc, S, Walters, WB, Wu, CY, Wu, J, Zhu, S, and Ziliani, S

Subjects
Science & Technology, STATES, Physics, Physical Sciences, Physics, Multidisciplinary, TRANSITION
Abstract

The low-spin structure of the semimagic ^{64}Ni nucleus has been considerably expanded: combining four experiments, several 0^{+} and 2^{+} excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes: a prolate 0^{+} excitation is located at a surprisingly high energy (3463 keV), with a collective 2^{+} state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N=40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N. ispartof: PHYSICAL REVIEW LETTERS vol:125 issue:10 ispartof: location:United States status: published

Published
2020

21. Decay studies of the long-lived states in 186Tl

Author

Stryjczyk, M, Andel, B, Andreyev, AN, Cubiss, J, Pakarinen, J, Rezynkina, K, Van Duppen, P, Antalic, S, Berry, T, Borge, MJG, Clisu, C, Cox, DM, De Witte, H, Fraile, LM, Fynbo, HOU, Gaffney, LP, Harkness-Brennan, LJ, Huyse, M, Illana, A, Judson, DS, Konki, J, Kurcewicz, J, Lazarus, I, Lica, R, Madurga, M, Marginean, N, Marginean, R, Mihai, C, Mosat, P, Nacher, E, Negret, A, Ojala, J, Ovejas, JD, Page, RD, Papadakis, P, Pascu, S, Perea, A, Podolyák, Z, Pucknell, V, Rapisarda, E, Rotaru, F, Sotty, C, Tengblad, O, Vedia, V, Viñals, S, Wadsworth, R, Warr, N, Wrzosek-Lipska, K, and IDS Collaboration

Abstract

ispartof: Physical Review C vol:102 issue:2 status: published

Published
2020

22. Decay studies of the long-lived states in 186 Tl

Author

Stryjczyk, M., Andel, B., Andreyev, A.N, Cubiss, J., Pakarinen, J., Rezynkina, K., Van Duppen, P., Antalic, S., Berry, T., Borge, M.J.G, Clisu, C., Cox, D.M, De Witte, H., Fraile, L.M, Fynbo, H.O.U, Gaffney, L.P, Harkness-Brennan, L.J, Huyse, M., Illana, A., Judson, D.S, Konki, J., Kurcewicz, J., Lazarus, I., Lica, R., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mosat, P., Nacher, E., Negret, A., Ojala, J., Ovejas, J.D, Page, R.D, Papadakis, P., Pascu, S., Perea, A., Podolyak, Zsolt, Pucknell, V., Rapisarda, E., Rotaru, F., Sotty, Ch., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., Warr, N., and Wrzosek-Lipska, K.

Subjects
Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Decay spectroscopy of the long-lived states in 186Tl has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The � decay from the low-spin (2

Published
2020

23. New beta-decaying state in Bi-214

Author

Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Lica, R., Naidja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J. G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D., V, Fedosseev, V. N., Fraile, L. M., Fynbo, H. O. U., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I, Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V, Rahkila, P., Rapisarda, E., Rezynkina, K., Sanchez-Tembleque, V, Schomacker, K., Seliverstov, M. D., Sotty, C., Stan, L., Surder, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., Warr, N., Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Lica, R., Naidja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J. G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D., V, Fedosseev, V. N., Fraile, L. M., Fynbo, H. O. U., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I, Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V, Rahkila, P., Rapisarda, E., Rezynkina, K., Sanchez-Tembleque, V, Schomacker, K., Seliverstov, M. D., Sotty, C., Stan, L., Surder, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., and Warr, N.

Abstract

A new beta-decaying state in Bi-214 has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred I-pi = (8(-)) assignment was suggested for this state based on the beta-decay feeding pattern to levels in Po-214 and shell-model calculations. The half-life of the I-pi = (8) state was deduced to be T-1/2 = 9.39(10) min. The deexcitation of the levels populated in Po-214 by the beta decay of this state was investigated via gamma-gamma coincidences and a number of new levels and transitions was identified. Shell-model calculations for excited states in Bi-214 and Po-214 were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new beta-decaying state as an I-pi = 8 - isomer and allow for tentative assignment of shell-model states to several high-spin states in Po-214.

Published
2021

24. Collective properties of neutron-deficient Nd isotopes: Lifetime measurements of the yrast states in Nd136

Author

Turturică, A., primary, Costache, C., additional, Petkov, P., additional, Delaroche, J.-P., additional, Girod, M., additional, Libert, J., additional, Cată-Danil, G., additional, Pascu, S., additional, Mihai, C., additional, Boromiza, M., additional, Bucurescu, D., additional, Clisu, C., additional, Filipescu, D., additional, Florea, N. M., additional, Gheorghe, I., additional, Ionescu, A., additional, Lică, R., additional, Mărginean, N. M., additional, Mărginean, R., additional, Mihai, R. E., additional, Mitu, A., additional, Negret, A., additional, Niţă, C. R., additional, Olăcel, A., additional, Oprea, A., additional, Sava, T., additional, Sotty, C., additional, Stan, L., additional, Ştiru, I., additional, Şuvăilă, R., additional, Toma, S., additional, Turturică, G. V., additional, and Ujeniuc, S., additional

Published
2021
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25. Decay studies of the long-lived states in Tl186

Author

Stryjczyk, M., Andel, B., Andreyev, A. N., Cubiss, J., Pakarinen, J., Rezynkina, K., Van Duppen, P., Antalic, S., Berry, T., Borge, M. J. G., Clisu, C., Cox, D. M., De Witte, H., Fraile, L. M., Fynbo, H. O. U., Gaffney, L. P., Harkness-Brennan, L. J., Huyse, M., Illana, A., Judson, D. S., Konki, J., Kurcewicz, J., Lazarus, I., Lica, R., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mosat, P., Nacher, E., Negret, A., Ojala, J., Ovejas, J. D., Page, R. D., Papadakis, P., Pascu, S., Perea, A., Podolyák, Zs., Pucknell, V., Rapisarda, E., Rotaru, F., Sotty, C., Tengblad, O., Vedia, V., Viñals, S., Wadsworth, R., Warr, N., and Wrzosek-Lipska, K.

Subjects
lifetimes and widths, alpha decay, electromagnetic transitions, High Energy Physics::Experiment, isomer decays, ydinfysiikka, nuclear structure and decays
Abstract

Decay spectroscopy of the long-lived states in 186Tl has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The α decay from the low-spin (2−) state in 186Tl was observed for the first time and a half-life of 3.4+0.5−0.4 s was determined. Based on the α-decay energy, the relative positions of the long-lived states were fixed, with the (2−) state as the ground state, the 7(+) state at 77(56) keV, and the 10(−) state at 451(56) keV. The level scheme of the internal decay of the 186Tl(10(−)) state [T1/2=3.40(9) s], which was known to decay solely through emission of 374-keV γ-ray transition, was extended and a lower limit for the β-decay branching bβ>5.9(3)% was determined. The extracted retardation factors for the γ decay of the 10(−) state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the πd3/2 shell in the isomeric decay and significant structure differences between 184Tl and 186Tl. peerReviewed

Published
2020

26. Shape Coexistence at Zero Spin in Ni64 Driven by the Monopole Tensor Interaction

Author

Mărginean, N., Little, D., Tsunoda, Y., Leoni, S., Janssens, R. V. F., Fornal, B., Otsuka, T., Michelagnoli, C., Stan, L., Crespi, F. C. L., Costache, C., Lica, R., Sferrazza, M., Turturica, A., Ayangeakaa, A. D., Auranen, K., Barani, M., Bender, P. C., Bottoni, S., Boromiza, M., Bracco, A., Călinescu, S., Campbell, C. M., Carpenter, M. P., Chowdhury, P., Ciemała, M., Cieplicka-Oryǹczak, N., Cline, D., Clisu, C., Crawford, H. L., Dinescu, I. E., Dudouet, J., Filipescu, D., Florea, N., Forney, A. M., Fracassetti, S., Gade, A., Gheorghe, I., Hayes, A. B., Harca, I., Henderson, J., Ionescu, A., Iskra, Ł. W., Jentschel, M., Kandzia, F., Kim, Y. H., Kondev, F. G., Korschinek, G., Köster, U., Krishichayan, Krzysiek, M., Lauritsen, T., Li, J., Mărginean, R., Maugeri, E. A., Mihai, C., Mihai, R. E., Mitu, A., Mutti, P., Negret, A., Niţă, C. R., Olăcel, A., Oprea, A., Pascu, S., Petrone, C., Porzio, C., Rhodes, D., Seweryniak, D., Schumann, D., Sotty, C., Stolze, S. M., Şuvăilă, R., Toma, S., Ujeniuc, S., Walters, W. B., Wu, C. Y., Wu, J., Zhu, S., and Ziliani, S.

Subjects
ddc
Published
2019

27. Decay studies of the long-lived states in Tl-186

Author

Stryjczyk, M., Andel, B., Andreyev, A. N., Cubiss, J., Pakarinen, J., Rezynkina, K., Van Duppen, P., Antalic, S., Berry, T., Borge, M. J. G., Clisu, C., Cox, D. M., De Witte, H., Fraile, L. M., Fynbo, H. O. U., Gaffney, L. P., Harkness-Brennan, L. J., Huyse, M., Illana, A., Judson, D. S., Konki, J., Kurcewicz, J., Lazarus, I, Lica, R., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mosat, P., Nacher, E., Negret, A., Ojala, J., Ovejas, J. D., Page, R. D., Papadakis, P., Pascu, S., Perea, A., Podolyak, Zs, Pucknell, V, Rapisarda, E., Rotaru, F., Sotty, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., Warr, N., Wrzosek-Lipska, K., Stryjczyk, M., Andel, B., Andreyev, A. N., Cubiss, J., Pakarinen, J., Rezynkina, K., Van Duppen, P., Antalic, S., Berry, T., Borge, M. J. G., Clisu, C., Cox, D. M., De Witte, H., Fraile, L. M., Fynbo, H. O. U., Gaffney, L. P., Harkness-Brennan, L. J., Huyse, M., Illana, A., Judson, D. S., Konki, J., Kurcewicz, J., Lazarus, I, Lica, R., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mosat, P., Nacher, E., Negret, A., Ojala, J., Ovejas, J. D., Page, R. D., Papadakis, P., Pascu, S., Perea, A., Podolyak, Zs, Pucknell, V, Rapisarda, E., Rotaru, F., Sotty, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., Warr, N., and Wrzosek-Lipska, K.

Abstract

Decay spectroscopy of the long-lived states in Tl-186 has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The a decay from the low-spin (2(-)) state in Tl-186 was observed for the first time and a half-life of 3.4(-0.)(4)(+0.5) s was determined. Based on the alpha-decay energy, the relative positions of the long-lived states were fixed, with the (2(-)) state as the ground state, the 7((+)) state at 77(56) keV, and the 10((-)) state at 451(56) keV. The level scheme of the internal decay of the Tl-186(10((-))) state [T-1/2 = 3.40(9) s], which was known to decay solely through emission of 374-keV gamma-ray transition, was extended and a lower limit for the beta-decay branching b(beta) > 5.9(3)% was determined. The extracted retardation factors for the gamma decay of the 10((-) )state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the pi d(3/2) shell in the isomeric decay and significant structure differences between Tl-184 and Tl-186.

Published
2020

28. Decay of the “Stretched” M4 resonance in 13C

Author

Cieplicka-Oryńczak, N., Fornal, B., Ciemała, M., Kmiecik, Maria, Maj, Adam, Lukasik, J., Pawłowski, P., Sowicki, B., Wasilewska, B., Zieblinski, M., Grebosz, J., Krzysiek, M., Matejska-Minda, M., Mazurek, Katarzyna, Jaganathen, Y., Leoni, S., Boiano, C., Brambilla, S., Ziliani, Serena, Bottoni, S., Bracco, Angela, Camera, F., Iskra, L.W, Harakeh, M.N., Clisu, C., Florea, N, Marginean, N., Marginean, R, Stan, L, Burducea, I., Iancu, D.A., Sferrazza, Michele, Ploszajczak, M., Kulessa, P., Cieplicka-Oryńczak, N., Fornal, B., Ciemała, M., Kmiecik, Maria, Maj, Adam, Lukasik, J., Pawłowski, P., Sowicki, B., Wasilewska, B., Zieblinski, M., Grebosz, J., Krzysiek, M., Matejska-Minda, M., Mazurek, Katarzyna, Jaganathen, Y., Leoni, S., Boiano, C., Brambilla, S., Ziliani, Serena, Bottoni, S., Bracco, Angela, Camera, F., Iskra, L.W, Harakeh, M.N., Clisu, C., Florea, N, Marginean, N., Marginean, R, Stan, L, Burducea, I., Iancu, D.A., Sferrazza, Michele, Ploszajczak, M., and Kulessa, P.

Abstract

info:eu-repo/semantics/published

Published
2020

29. Reviewing Nuclear Structure Properties of Even-Even Yb Isotopes.

Author

Zyriliou, A., Mertzimekis, T. J., Chalil, A., Vasileiou, P., Pelonis, S., Efstathiou, M., Mavrommatis, E., Bonatsos, D., Martinou, A., Peroulis, S., Minkov, N., Stan, L., Turturica, A., Costache, C., Mihai, R., Borcea, R., Ujeniuc, S., Toma, S., Clisu, C., and Oprea, A.

Subjects
NUCLEAR structure, ISOTOPES, YTTERBIUM, ATOMIC mass, COLLECTIVE behavior, QUADRUPOLE moments, PROTON transfer reactions
Abstract

The medium-to-heavy mass ytterbium isotopes (70Yb) in the rare-earth mass region are known to be well-deformed nuclei. Spectroscopic information becomes scarcer as the neutron number increases, impeding the understanding of nuclear structure in this mass region, where interesting phenomena, such as shape coexistence, have been predicted [1]. The lack of any experimental information on the structure of the neutron-rich 178Yb and 180Yb have greatly motivated this study, which can offer useful information for the collective behavior of neutrons and protons, the evolution of shape and shape coexistence. A test run was performed to investigate the population of excited states and a first measurement of the unknown 2+1 lifetime of 178Yb by means of a two neutron-transfer reaction 176Yb(18O,16O)178Yb using the ROSPHERE [2] array at IFIN-HH, Romania. From the theoretical point of view, in this work, the reduced transition probabilities B(E2) and transition quadrupole moments Q have been calculated using the IBM-1 and various other theoretical models, including the recently developed Proxy and Pseudo SU(3) model [3]. Good agreement was found between available adopted data [4] and theoretical predictions for 164-180Yb isotopes. [ABSTRACT FROM AUTHOR]

Published
2021
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30. Decay of the “Stretched” M4 Resonance in \(^{13}\)C

Author

Cieplicka-Oryńczak, N., primary, Fornal, B., additional, Ciemała, M., additional, Kmiecik, M., additional, Maj, A., additional, Łukasik, J., additional, Pawłowski, P., additional, Sowicki, B., additional, Wasilewska, B., additional, Ziębliński, M., additional, Grębosz, J., additional, Krzysiek, M., additional, Matejska-Minda, M., additional, Mazurek, K., additional, Jaganathen, Y., additional, Leoni, S., additional, Boiano, C., additional, Brambilla, S., additional, Ziliani, S., additional, Bottoni, S., additional, Bracco, A., additional, Camera, F., additional, Iskra, Ł.W., additional, Harakeh, M.N., additional, Clisu, C., additional, Florea, N., additional, Marginean, N., additional, Marginean, R., additional, Stan, L., additional, Burducea, I., additional, Iancu, D.A., additional, Sferrazza, M., additional, Płoszajczak, M., additional, and Kulessa, P., additional

Published
2020
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31. Shape transitions between and within Zr isotopes.

Author

de Angelis, G., Corradi, L., Werner, V., Witt, W., Beck, T., Pietralla, N., Boromiza, M., Clisu, C., Costache, C., Dinescu, I.E., Ionescu, A., John, P.R., Koseoglou, P., Margineăn, N., Margineăn, R., Mihai, C., Mihai, R.E., Mitu, A., Negret, A., and Nita, C.R.

Subjects
ZIRCONIUM isotopes, NEUTRONS, NUCLEAR shell theory, GROUND state energy, NUCLEAR structure
Abstract

The Zirconium isotopes across the N=56,58 neutron sub-shell closures have been of special interest since years, sparked by the near doubly-magic features of 96Zr and the subsequent rapid onset of collectivity with a deformed ground-state structure already in 100Zr. Recent state-of-the-art shell model approaches did not only correctly describe this shape-phase transition in the Zr isotopic chain, but alsothe coexistence of non-collective structures and pronounced collectivity especially in 96,98Zr. Theisotope 98Zr is located on the transition from spherical to deformed ground state structures. We summarize recent experimental work to obtain the B(E2) excitation strengths of the first 2+ state of98Zr, including a new experiment employing the recoil-distance Doppler-shift method following a two-neutron transfer reaction. [ABSTRACT FROM AUTHOR]

Published
2019
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32. Cross section measurements of low-energy charged particle induced reactions using moderated neutron counter arrays

Author

Clisu Cristina, Gheorghe Ioana, Filipescu Dan, Renstrøm Therese, Aciksoz Esra, Boromiza Marian, Florea Nicoleta, Gosta Giulia, Ionescu Alina, Krzysiek Mateusz, Maj Adam, Mihai Constantin, Negret Alexandru, Nita Cristina, Olacel Adina, Petrone Cristina, Serban Andreea, Sotty Christophe, Stiru Irina, Stan Lucian, Suvaila Rares, Toma Sebastian, Turturica Andrei, Tveten Gry M., Ujeniuc Sorin, Wieland Oliver, Zeiser Fabio, Camera Franco, and Utsunomiya Hiroaki

Subjects
Physics, QC1-999
Abstract

A high-and-flat efficiency moderated neutron detection array of 3He counters has been recently developed for photoneutron cross section measurements at the future ELI-NP gamma-ray beam source. We have designed a three rings geometry of 31 counters with a ˜37% efficiency flat within 5% in the 10 keV to 5 MeV neutron energy interval. A commissioning experiment was performed using proton beams delivered by the 9 MV Tandem accelerator of IFIN-HH. We measured the neutron production cross sections for proton induced reactions on nat Cu and 27Al. The (p, xn) reactions on nat Cu were investigated in the 4.5 MeV to 14 MeV proton energy range with 250 keV steps, using pulsed and continuous proton beams. The low energy measurements below 10 MeV served to validate the detection efficiency calibration against well-known natCu(p, n) cross sections. The 27Al(p, n) reaction was investigated in the 5.8 MeV to 6.75 MeV energy range with 5 keV steps. Preliminary cross section results are here compared with preceding data.

Published
2023
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