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1. Energy Dependence of Prompt Fission Neutron Multiplicity in the $^{239}$Pu($n,f$) Reaction

Author

Marini, P., Taieb, J., Neudecker, D., Bélier, G., Chatillon, A., Etasse, D., Laurent, B., Morfouace, P., Morillon, B., Devlin, M., Gomez, J. A., Haight, R. C., Kelly, K. J., and O'Donnell, J. M.

Subjects
Nuclear Experiment
Abstract

Accurate multiplicities of prompt fission neutrons emitted in neutron-induced fission on a large energy range are essential for fundamental and applied nuclear physics. Measuring them to high precision for radioactive fissioning nuclides remains, however, an experimental challenge. In this work, the average prompt-neutron multiplicity emitted in the 239Pu(n,f) reaction was extracted as a function of the incident-neutron energy, over the range 1-700~MeV, with a novel technique, which allowed to minimize and correct for the main sources of bias and thus achieve unprecedented precision. At low energies, our data validate for the first time the ENDF/B-VIII.0 nuclear data evaluation with an independent measurement and reduce the evaluated uncertainty by up to $60\%$. This work opens up the possibility of precisely measuring prompt fission neutron multiplicities on highly radioactive nuclei relevant for an essential component of energy production world-wide., Comment: 6 pages, 4 figures

Published
2021

2. Prompt Fission Neutrons in the $^{239}$Pu($n,f$) Reaction

Author

Marini, P., Taieb, J., Laurent, B., Belier, G., Chatillon, A., Etasse, D., Morfouace, P., Devlin, M., Gomez, J. A., Haight, R. C., Kelly, K. J., O'Donnel, J. M., and Schmitt, K. T.

Subjects
Nuclear Experiment
Abstract

Prompt fission neutron spectra from $^{239}$Pu($n,f$) were measured for incident neutron energies from $0.7$ to $700\,$MeV at the Weapons Neutron Research facility (WNR) of the Los Alamos Neutron Science Center. A newly designed high-efficiency fission chamber was coupled to the highly segmented Chi-Nu array to detect neutrons emitted in fission events. The double time-of-flight technique was used to deduce the incident-neutron energies from the spallation target and the outgoing-neutron energies from the fission chamber. Prompt fission neutron spectra (PFNS) were measured with respect to $^{252}$Cf spontaneous fission down to $200\,$keV and up to about $12\,$MeV for all the incident neutron energies with typical uncertainties well below $2\%$ up to about $10\,$MeV outgoing-neutron energy. The general trend of PFNS is well reproduced by JEFF3.3 and ENDF-B\VIII.0 evaluations. Discrepancies were however observed for the low-energy part of the spectra, where evaluations overestimate the number of emitted neutrons. Neutron multiplicities and average kinetic energies as a function of incident-neutron energy are obtained experimentally with reported uncertainties below $0.4\%$. Neutron multiplicities disagree with some older datasets above $6\,$ MeV, indicating the need of using a high-efficiency fission detector, which does not bias the data. The measured mean kinetic energies agree with the most recent data. Evaluations fairly reproduce the trend, but fail to reproduce the experimental values within their uncertainties., Comment: Version 2, 15 pages, 21 figures

Published
2019
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3. Study of N=50Z=3282 gap evolution around N=50Z=3282: new structure information for N=50Z=3282Ge

Author

Thisse, D., Lebois, M., Verney, D., Wilson, J. N., Jovančević, N., Rudigier, M., Canavan, R., Etasse, D., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Oryńczak, N., Courtin, S., Cortés, M. L., Davies, P., Delafosse, C., Fallot, M., Fornal, B., Fraile, L., Gjestvang, D., Gottardo, A., Guadilla, V., Gerst, R. -B., Häfner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I., Hommet, J., Ibrahim, F., Iskra, Ł. W., Ivanov, P., Jazrawi, S., Korgul, A., Koseoglou, P., Kröll, T., Kurtukian-Nieto, T., Meur, L. Le, Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa-Silkowska, M., Poklepa, W., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Reygadas-Tello, D., Rezynkina, K., Sánchez-Tembleque, V., Siem, S., Schmitt, C., Söderström, P. -A., Solak, K., Sürder, C., Tocabens, G., Vedia, V., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M., Zeiser, F., and Ziliani, S.

Published
2023
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4. Multiplicity of prompt fission neutron in the 239Pu(n,f) reaction and its energy dependence

Author

Marini P., Taieb J., Neudecker D., Bélier G., Chatillon A., Etasse D., Laurent B., Morfouace P., Morillon B., Devlin M., Gomez J. A., Haight R. C., Kelly K. J., and O’Donnell J. M.

Subjects
Physics, QC1-999
Abstract

Accurate multiplicities of prompt fission neutrons emitted in neutron-induced fission on a large energy range are essential for fundamental and applied nuclear physics. Measuring them to high precision for radioactive fissioning nuclides is, however, an experimental challenge. In this work, we extract the average prompt-neutron multiplicity emitted in the 239 Pu (n, f) reaction as a function of the incident-neutron energy, over the range 0.7-700 MeV. We used a novel technique, which allowed us to minimize and correct for the main sources of bias and thus achieve unprecedented precision. At low energies, our data validate, for the first time, the ENDF/B-VIII.0 nuclear data evaluation with an independent measurement and reduce the evaluated uncertainty by up to 60%. This work opens up the possibility of measuring, with high precision, prompt fission neutron multiplicities on highly radioactive nuclei relevant for energy production.

Published
2024
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5. High Precision Measurement of the $^{19}$Ne Half-life using real-time digital acquisition

Author

Fontbonne, C., Ujić, P., Santos, F. de Oliveira, Fléchard, X., Rotaru, F., Achouri, N. L., Alcindor, V. Girard, Bastin, B., Boulay, F., Briand, J. B., Sánchez-Benítez, A. M., Bouzomita, H., Borcea, C., Borcea, R., Blank, B., Carniol, B., Čeliković, I., Delahaye, P., Delaunay, F., Etasse, D., Fremont, G., de France, G., Fontbonne, J. M., Grinyer, G. F., Harang, J., Hommet, J., Jevremović, A., Lewitowicz, M., Martel, I., Mrazek, J., Parlog, M., Poincheval, J., Ramos, D., Spitaels, C., Stanoiu, M., Thomas, J. C., and Toprek, D.

Subjects
Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

The half-life of $^{19}$Ne has been measured using a real-time digital multiparametric acquisition system providing an accurate time-stamp and relevant information on the detectors signals for each decay event. An exhaustive offline analysis of the data gave unique access to experimental effects potentially biasing the measurement. After establishing the influence factors impacting the measurement such as after-pulses, pile-up, gain and base line fluctuations, their effects were accurately estimated and the event selection optimized. The resulting half-life, $17.2569\pm0.0019_{(stat)}\pm0.0009_{(syst)}$~s, is the most precise up to now for $^{19}$Ne. It is found in agreement with two recent precise measurements and not consistent with the most recent one [L.J. Broussard {\it et al.}, Phys. Rev. Lett. {\bf112}, 212301 (2014)] by 3.0 standard deviations. The full potential of the technique for nuclei with half-lives of a few seconds is discussed., Comment: 11 pages, 16 figures

Published
2017
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6. Characterization and performances of DOSION, a dosimetry equipment dedicated to radiobiology experiments taking place at GANIL

Author

Boissonnat, G., Fontbonne, J. -M., Balanzat, E., Boumard, F., Carniol, B., Cassimi, A., Colin, J., Cussol, D., Etasse, D., Fontbonne, C., Frelin, A. -M., Hommet, J., Peronnel, J., and Salvador, S.

Subjects
Physics - Medical Physics, Nuclear Experiment
Abstract

Currently, radiobiology experiments using heavy ions at GANIL(Grand Accelerateur National d Ions Lourds) are conducted under the supervision of the CIMAP (Center for research on Ions, MAterials and Photonics). In this context, a new beam monitoring equipment named DOSION has been developed. It allows to perform measurements of accurate fluence and dose maps in near real time for each biological sample irradiated. In this paper, we present the detection system, its design, performances, calibration protocol and measurements performed during radiobiology experiments. This setup is currently available for any radiobiology experiments if one wishes to correlate one s own sample analysis to state of the art dosimetric references.

Published
2016
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8. Angular momentum generation in nuclear fission

Author

Wilson, J. N., Thisse, D., Lebois, M., Jovancevic, N., Gjestvang, D., Canavan, R., Rudigier, M., Etasse, D., Gerst, R.B., Gaudefroy, L., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., and Benzoni, G.

Subjects
Angular momentum -- Research, Nuclear fission -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

When a heavy atomic nucleus splits (fission), the resulting fragments are observed to emerge spinning.sup.1; this phenomenon has been a mystery in nuclear physics for over 40 years.sup.2,3. The internal generation of typically six or seven units of angular momentum in each fragment is particularly puzzling for systems that start with zero, or almost zero, spin. There are currently no experimental observations that enable decisive discrimination between the many competing theories for the mechanism that generates the angular momentum.sup.4-12. Nevertheless, the consensus is that excitation of collective vibrational modes generates the intrinsic spin before the nucleus splits (pre-scission). Here we show that there is no significant correlation between the spins of the fragment partners, which leads us to conclude that angular momentum in fission is actually generated after the nucleus splits (post-scission). We present comprehensive data showing that the average spin is strongly mass-dependent, varying in saw-tooth distributions. We observe no notable dependence of fragment spin on the mass or charge of the partner nucleus, confirming the uncorrelated post-scission nature of the spin mechanism. To explain these observations, we propose that the collective motion of nucleons in the ruptured neck of the fissioning system generates two independent torques, analogous to the snapping of an elastic band. A parameterization based on occupation of angular momentum states according to statistical theory describes the full range of experimental data well. This insight into the role of spin in nuclear fission is not only important for the fundamental understanding and theoretical description of fission, but also has consequences for the [gamma]-ray heating problem in nuclear reactors.sup.13,14, for the study of the structure of neutron-rich isotopes.sup.15,16, and for the synthesis and stability of super-heavy elements.sup.17,18. [gamma]-ray spectroscopy experiments on the origin of spin in the products of nuclear fission of spin-zero nuclei suggest that the fission fragments acquire their spin after scission, rather than before., Author(s): J. N. Wilson [sup.1] , D. Thisse [sup.1] , M. Lebois [sup.1] , N. Jovancevic [sup.1] , D. Gjestvang [sup.2] , R. Canavan [sup.3] [sup.4] , M. Rudigier [sup.3] [...]

Published
2021
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10. Multiplicity of prompt fission neutron in the 239Pu(n,f) reaction and its energy dependence.

Author

Marini, P., Taieb, J., Neudecker, D., Bélier, G., Chatillon, A., Etasse, D., Laurent, B., Morfouace, P., Morillon, B., Devlin, M., Gomez, J. A., Haight, R. C., Kelly, K. J., and O'Donnell, J. M.

Subjects
NUCLEAR fission, SPONTANEOUS fission, NEUTRON multiplicity, NUCLEAR physics, NUCLEAR energy
Abstract

Accurate multiplicities of prompt fission neutrons emitted in neutron-induced fission on a large energy range are essential for fundamental and applied nuclear physics. Measuring them to high precision for radioactive fissioning nuclides is, however, an experimental challenge. In this work, we extract the average prompt-neutron multiplicity emitted in the 239 Pu (n, f) reaction as a function of the incident-neutron energy, over the range 0.7-700 MeV. We used a novel technique, which allowed us to minimize and correct for the main sources of bias and thus achieve unprecedented precision. At low energies, our data validate, for the first time, the ENDF/B-VIII.0 nuclear data evaluation with an independent measurement and reduce the evaluated uncertainty by up to 60%. This work opens up the possibility of measuring, with high precision, prompt fission neutron multiplicities on highly radioactive nuclei relevant for energy production. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Study of $$N=50$$ gap evolution around $$Z=32$$: new structure information for $${}^{82}$$Ge

Author

Thisse, D., primary, Lebois, M., additional, Verney, D., additional, Wilson, J. N., additional, Jovančević, N., additional, Rudigier, M., additional, Canavan, R., additional, Etasse, D., additional, Adsley, P., additional, Algora, A., additional, Babo, M., additional, Belvedere, K., additional, Benito, J., additional, Benzoni, G., additional, Blazhev, A., additional, Boso, A., additional, Bottoni, S., additional, Bunce, M., additional, Chakma, R., additional, Cieplicka-Oryńczak, N., additional, Courtin, S., additional, Cortés, M. L., additional, Davies, P., additional, Delafosse, C., additional, Fallot, M., additional, Fornal, B., additional, Fraile, L., additional, Gjestvang, D., additional, Gottardo, A., additional, Guadilla, V., additional, Gerst, R. -B., additional, Häfner, G., additional, Hauschild, K., additional, Heine, M., additional, Henrich, C., additional, Homm, I., additional, Hommet, J., additional, Ibrahim, F., additional, Iskra, Ł. W., additional, Ivanov, P., additional, Jazrawi, S., additional, Korgul, A., additional, Koseoglou, P., additional, Kröll, T., additional, Kurtukian-Nieto, T., additional, Meur, L. Le, additional, Leoni, S., additional, Ljungvall, J., additional, Lopez-Martens, A., additional, Lozeva, R., additional, Matea, I., additional, Miernik, K., additional, Nemer, J., additional, Oberstedt, S., additional, Paulsen, W., additional, Piersa-Silkowska, M., additional, Poklepa, W., additional, Popovitch, Y., additional, Porzio, C., additional, Qi, L., additional, Ralet, D., additional, Regan, P. H., additional, Reygadas-Tello, D., additional, Rezynkina, K., additional, Sánchez-Tembleque, V., additional, Siem, S., additional, Schmitt, C., additional, Söderström, P. -A., additional, Solak, K., additional, Sürder, C., additional, Tocabens, G., additional, Vedia, V., additional, Warr, N., additional, Wasilewska, B., additional, Wiederhold, J., additional, Yavahchova, M., additional, Zeiser, F., additional, and Ziliani, S., additional

Published
2023
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14. Energy dependence of prompt fissions neutron multiplicity in the Pu( , ) Reaction

Author

Marini, P., Taieb, J., Neudecker, D., Bélier, G., Chatillon, A., Etasse, D., Laurent, B., Morfouace, P., Morillon, B., Devlin, M., Gomez, J.A., Haight, R.C., Kelly, K.J., and O'Donnell, J.M.

Abstract

Accurate multiplicities of prompt fission neutrons emitted in neutron-induced fission on a large energy range are essential for fundamental and applied nuclear physics. Measuring them to high precision for radioactive fissioning nuclides remains, however, an experimental challenge. In this work, the average prompt-neutron multiplicity emitted in the $^{239}$Pu(n,f) reaction was extracted as a function of the incident-neutron energy, over the range 1-700 MeV, with a novel technique, which allowed to minimize and correct for the main sources of bias and thus achieve unprecedented precision.At low energies, our data validate for the first time the ENDF/B-VIII.0 nuclear data evaluation with an independent measurement and reduce the evaluated uncertainty by up to 60%. This work opens up the possibility of precisely measuring prompt fission neutron multiplicities on highly radioactive nuclei relevant for an essential component of energy production world-wide.

Published
2022

15. Beta spectrum shape studies for the predictions of the antineutrino spectrum from reactors.

Author

Alcalá, G. A., Algora, A., Fallot, M., Estienne, M., Guadilla, V., Gelletly, W., Beloeuvre, A., Stutzmann, J.-S., Bouvier, S., Eronen, T., Agramunt, J., Bonnet, E., Etasse, D., Giot, L., Laureau, A., Porta, A., Victoria, J. A., and Molla, Y.

Subjects
BETA-ray spectrometers, ANTINEUTRINOS, NUCLEAR reactors, PREDICTION models, NUCLEAR fission
Abstract

Nuclear reactors antineutrino measurements at short baselines do not fully agree with model predictions calculated with the Conversion Method. An alternative method to calculate the antineutrino spectra is theSummation Method. Both methods require the shapes of beta spectra as inputs. For that reason a new setup to measure the shape of the beta spectrum of relevant fission products for the calculation of the antineutrino spectra of reactors has been developed. Some preliminary measurements performed at IGISOL with isotopically clean beams are presented in this contribution. [ABSTRACT FROM AUTHOR]

Published
2023
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16. Study of N=50 gap evolution around Z=32: new structure information for 82Ge.

Author

Thisse, D., Lebois, M., Verney, D., Wilson, J. N., Jovančević, N., Rudigier, M., Canavan, R., Etasse, D., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., and Cieplicka-Oryńczak, N.

Subjects
NEUTRON sources, COINCIDENCE, SPECTROMETERS, SPECTROMETRY
Abstract

Medium spin states of light N = 50 isotones have been populated using fast neutron-induced fission of 232 Th. Online prompt γ spectroscopy has been performed using the hybrid γ spectrometer ν - Ball coupled to the LICORNE directional neutron source at the ALTO facility of IJCLab. Medium spin states of the neutron-rich nucleus 82 Ge have been investigated using γ - γ and γ - γ - γ coincidence data to exploit the resolving power of ν - Ball. Two new transitions were assigned to this nucleus and a new level was placed in the level scheme. We tentatively assigned to this new state a ( 7 + ) spin-parity, which is interpreted as a new N = 50 core breaking state. This provides further insight into the energy evolution of the N = 50 shell gap toward 78 Ni. [ABSTRACT FROM AUTHOR]

Published
2023
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17. First lifetime investigations of N>82 iodine isotopes: The quest for collectivity

Author

Häfner, G., primary, Lozeva, R., additional, Naïdja, H., additional, Lebois, M., additional, Jovančević, N., additional, Thisse, D., additional, Etasse, D., additional, Canavan, R. L., additional, Rudigier, M., additional, Wilson, J. N., additional, Adamska, E., additional, Adsley, P., additional, Algora, A., additional, Babo, M., additional, Belvedere, K., additional, Benito, J., additional, Benzoni, G., additional, Blazhev, A., additional, Boso, A., additional, Bottoni, S., additional, Bunce, M., additional, Chakma, R., additional, Cieplicka-Oryńczak, N., additional, Collins, S. M., additional, Cortés, M. L., additional, Davies, P. J., additional, Delafosse, C., additional, Fallot, M., additional, Fraile, L. M., additional, Gerst, R.-B., additional, Gjestvang, D., additional, Guadilla, V., additional, Hauschild, K., additional, Henrich, C., additional, Homm, I., additional, Ibrahim, F., additional, Iskra, Ł. W., additional, Jazwari, S., additional, Korgul, A., additional, Koseoglou, P., additional, Kröll, Th., additional, Kurtukian-Nieto, T., additional, Le-meur, L., additional, Leoni, S., additional, Ljungvall, J., additional, Lopez-Martens, A., additional, Matthieu, L., additional, Miernik, K., additional, Nemer, J., additional, Oberstedt, S., additional, Paulsen, W., additional, Piersa-Siłkowska, M., additional, Popovitch, Y., additional, Porzio, C., additional, Qi, L., additional, Ralet, D., additional, Regan, P. H., additional, Reygadas Tello, D., additional, Rezynkina, K., additional, Sanchez-Tembleque, V., additional, Schmitt, C., additional, Söderström, P.-A., additional, Sürder, C., additional, Tocabens, G., additional, Vedia, V., additional, Verney, D., additional, Warr, N., additional, Wasilewska, B., additional, Wiederhold, J., additional, Yavahchova, M. S., additional, Zeiser, F., additional, and Ziliani, S., additional

Published
2021
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18. Spectroscopy and lifetime measurements in 134,136,138Te isotopes and implications for the nuclear structure beyond N = 82

Author

Häfner, G., Naïdja, H., Lebois, M., Jovancevic, N., Thisse, D., Etasse, D, Canavan, R, Rudigier, M., Wilson, J. N., Adamska, E, Adsley, P, Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Collins, S. M., Cortés, M. L., Davies, P. J., Delafosse, C., Fallot, M., Fornal, B., Fraile, L. M., Gerst, R.-B., Gjestvang, Dorthea, Guadilla, V., Hauschild, K., Henrich, C., Homm, I., Ibrahim, F., Iskra, ŁW, Jazwari, S., Jolie, J., Korgul, A., Koseoglou, P., Kröll, Th., Kurtukian-Nieto, T., Le-meur, L., Ljungvall, J., Lopez-Martens, A., Matea, I., Matthieu, L., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, Wanja, Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Reygadas Tello, D., Rezynkina, K., Sanchez, V., Schmitt, C., Söderström, P.A., Sürder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, Y. S., Zeiser, Fabio, and Ziliani, S.

Abstract

We report on spectroscopic information and lifetime measurements of even-even neutron-rich Te isotopes. Excited states were populated in fast-neutron induced fission of 238U at the ALTO facility of IJCLab with the LICORNE neutron source and detected using the hybrid ν-ball spectrometer. We provide first results on lifetimes of the 6+1 state in 136Te and the (6+1), (4+1), and (2+1) states in 138Te and discuss the results in the context of large-scale shell-model calculations. The level schemes of 136Te and 138Te are revised in terms of lifetimes of their 2+1,4+1 states and updated information on the (4+2) state in 136Te is presented. In addition, previously reported data on spectroscopy and lifetimes in 134Te are reexamined. This work provides new insights into the evolution of collectivity for Te isotopes with N=82,84,86.

Published
2021

19. Spectroscopy and lifetime measurements in $^{134,136,138}$Te isotopes and implications for the nuclear structure beyond $N=82$

Author

Häfner, G., Lozeva, R., Naïdja, H., Lebois, M., Jovančević, N., Thisse, D., Etasse, D., Canavan, R.L., Rudigier, M., Wilson, J.N., Adamska, E., Adsley, P., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Oryńczak, N., Collins, S.M., Cortés, M.L., Davies, P.J., Delafosse, C., Fallot, Muriel, Fornal, B., Fraile, L.M., Gerst, R.B., Gjestvang, D., Guadilla, V., Hauschild, K., Henrich, C., Homm, I., Ibrahim, F., Iskra, Ł. W., Jazwari, S., Jolie, J., Korgul, A., Koseoglou, P., Kröll, Th., Kurtukian-Nieto, T., Le-Meur, L., Ljungvall, J., Lopez-Martens, A., Matea, I., Matthieu, L., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P.H., Reygadas Tello, D., Rezynkina, K., Sanchez, V., Schmitt, C., Söderström, P.A., Sürder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M.S., Zeiser, F., Ziliani, S., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure
Abstract

International audience; We report on spectroscopic information and lifetime measurements of even-even neutron-rich Te isotopes. Excited states were populated in fast-neutron induced fission of U238 at the ALTO facility of IJCLab with the LICORNE neutron source and detected using the hybrid ν-ball spectrometer. We provide first results on lifetimes of the 61+ state in Te136 and the (61+), (41+), and (21+) states in Te138 and discuss the results in the context of large-scale shell-model calculations. The level schemes of Te136 and Te138 are revised in terms of lifetimes of their 21+,41+ states and updated information on the (42+) state in Te136 is presented. In addition, previously reported data on spectroscopy and lifetimes in Te134 are reexamined. This work provides new insights into the evolution of collectivity for Te isotopes with N=82,84,86.

Published
2021

20. Spectroscopy and lifetime measurements in Te-134,Te-136,Te-138 isotopes and implications for the nuclear structure beyond N=82

Author

Hafner, G., Lozeva, R., Naiedja, H., Lebois, M., Jovancevic, N., Thisse, D., Etasse, D., Canavan, R. L., Rudigier, M., Wilson, J. N., Adamska, E., Adsley, P., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Collins, S. M., Cortes, M. L., Davies, P. J., Delafosse, C., Fallot, M., Fornal, B., Fraile, L. M., Gerst, R-B, Gjestvang, D., Guadilla, V, Hauschild, K., Henrich, C., Homm, I, Ibrahim, F., Iskra, L. W., Jazwari, S., Jolie, J., Korgul, A., Koseoglou, P., Kroell, Th, Kurtukian-Nieto, T., Le-meur, L., Ljungvall, J., Lopez-Martens, A., Matea, I, Matthieu, L., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Tello, D. Reygadas, Rezynkina, K., Sanchez, V, Schmitt, C., Soederstroem, P-A, Suerder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M. S., Zeiser, F., Ziliani, S., Hafner, G., Lozeva, R., Naiedja, H., Lebois, M., Jovancevic, N., Thisse, D., Etasse, D., Canavan, R. L., Rudigier, M., Wilson, J. N., Adamska, E., Adsley, P., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Collins, S. M., Cortes, M. L., Davies, P. J., Delafosse, C., Fallot, M., Fornal, B., Fraile, L. M., Gerst, R-B, Gjestvang, D., Guadilla, V, Hauschild, K., Henrich, C., Homm, I, Ibrahim, F., Iskra, L. W., Jazwari, S., Jolie, J., Korgul, A., Koseoglou, P., Kroell, Th, Kurtukian-Nieto, T., Le-meur, L., Ljungvall, J., Lopez-Martens, A., Matea, I, Matthieu, L., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Tello, D. Reygadas, Rezynkina, K., Sanchez, V, Schmitt, C., Soederstroem, P-A, Suerder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M. S., Zeiser, F., and Ziliani, S.

Abstract

We report on spectroscopic information and lifetime measurements of even-even neutron-rich Te isotopes. Excited states were populated in fast-neutron induced fission of U-238 at the ALTO facility of IJCLab with the LICORNE neutron source and detected using the hybrid.-ball spectrometer. We provide first results on lifetimes of the 6(1)(+) state in Te-136 and the (6(1)(+)), (4(1)(+)), and (2(1)(+)) states in Te-138 and discuss the results in the context of large-scale shell-model calculations. The level schemes of Te-136 and Te-138 are revised in terms of lifetimes of their 2(1)(+), 4(1)(+) states and updated information on the (4(2)(+)) state in Te-136 is presented. In addition, previously reported data on spectroscopy and lifetimes in Te-134 are reexamined. This work provides new insights into the evolution of collectivity for Te isotopes with N = 82, 84, 86.

Published
2021

21. First lifetime investigations of N > 82 iodine isotopes: The quest for collectivity

Author

Haefner, G., Lozeva, R., Naidja, H., Lebois, M., Jovancevic, N., Thisse, D., Etasse, D., Canavan, R. L., Rudigier, M., Wilson, J. N., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Collins, S. M., Cortes, M. L., Davies, P. J., Delafosse, C., Fallot, M., Fraile, L. M., Gerst, R-B, Gjestvang, D., Guadilla, V, Hauschild, K., Henrich, C., Homm, I, Ibrahim, F., Iskra, L. W., Jazwari, S., Korgul, A., Koseoglou, P., Kroell, Th, Kurtukian-Nieto, T., Le-meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Matthieu, L., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa-Silkowska, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Tello, D. Reygadas, Rezynkina, K., Sanchez-Tembleque, V, Schmitt, C., Soederstroem, P-A, Suerder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M. S., Zeiser, F., Ziliani, S., Haefner, G., Lozeva, R., Naidja, H., Lebois, M., Jovancevic, N., Thisse, D., Etasse, D., Canavan, R. L., Rudigier, M., Wilson, J. N., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Collins, S. M., Cortes, M. L., Davies, P. J., Delafosse, C., Fallot, M., Fraile, L. M., Gerst, R-B, Gjestvang, D., Guadilla, V, Hauschild, K., Henrich, C., Homm, I, Ibrahim, F., Iskra, L. W., Jazwari, S., Korgul, A., Koseoglou, P., Kroell, Th, Kurtukian-Nieto, T., Le-meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Matthieu, L., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa-Silkowska, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Tello, D. Reygadas, Rezynkina, K., Sanchez-Tembleque, V, Schmitt, C., Soederstroem, P-A, Suerder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M. S., Zeiser, F., and Ziliani, S.

Abstract

We report on spectroscopic information and lifetime measurements in the neutron-rich I-135,I-137,I-139 isotopes. This is the first lifetime data on iodine isotopes beyond N = 82. Excited states were populated in fast neutron-induced fission of U-238 at the ALTO facility of IJCLab with the LICORNE neutron source and detected using the hybrid nu-ball spectrometer. The level schemes of the I-135,I-137,I-139 isotopes are revised in terms of excited states with up to maximum spin-parity of (33/2(+)), populated for the first time in fast neutron-induced fission. We provide first results on the lifetimes of the (9/2(1)(+)) and (13/2(1)(+)) states in I-137 and I-139, and the (17/2(1)(+)) state in 137I. In addition, we give upper lifetime limits for the (11/2(1)(+)) states in I135-139, the (15/2(1)(+)) state in I-137, the (17/2(1)(+)) state in I-139, and reexamine the (29/2(1)(+)) state in I-137. The isomeric data in I-13(5) are reinvestigated, such as the previously known (15/2(1)(+)) and (23/21) isomers with T-1/2 of 1.64(14) and 4.6(7) ns, respectively, as obtained in this work. The new spectroscopic information is compared to that from spontaneous or thermal-neutron induced fission and discussed in the context of large scale shell-model (LSSM) calculations for the region beyond Sn-132, indicating the behavior of collectivity for the three valence-proton iodine chain with N = 82, 84, 86.

Published
2021

22. Prompt and delayed $\gamma$ spectroscopy of neutron-rich $^{94}$Kr and observation of a new isomer

Author

Gerst, R.-B., Blazhev, A., Warr, N., Wilson, J., Lebois, M., Jovančević, N., Thisse, D., Canavan, R., Rudigier, M., Etasse, D., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Oryńczak, N., Courtin, S., Cortés, M., Davies, P., Delafosse, C., Fallot, Muriel, Fornal, B., Fraile, L., Gjestvang, D., Gottardo, A., Guadilla, V., Häfner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I., Ibrahim, F., Iskra, Ł., Ivanov, P., Jazrawi, S., Korgul, A., Koseoglou, P., Kröll, T., Kurtukian-Nieto, T., Le Meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P., Reygadas-Tello, D., Rezynkina, K., Sánchez-Tembleque, V., Schmitt, C., Söderström, P.-A., Sürder, C., Tocabens, G., Vedia, V., Verney, D., Wasilewska, B., Wiederhold, J., Yavachova, M., Zeiser, F., Ziliani, S., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS]Physics [physics], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Physics::Atomic and Molecular Clusters, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; Prompt and delayed γ-ray spectroscopy of the neutron-rich 94Kr was performed, as part of the fission campaign at the ALTO facility of the IPN Orsay, using the fast-neutron-induced fission reaction 238U(n,f) in combination with the ν-Ball array, a novel hybrid γ spectrometer for energy and lifetime measurements. Several new yrast and nonyrast transitions were observed for the first time, extending the previously known level scheme. Additionally, we report on the observation of a new short-lived isomer at 3444 keV with a half-life of 32(3) ns. The analysis of the Nilsson orbitals obtained from Gogny cranked Hartree-Fock-Bogoliubov calculations suggests a (9−) spin and an oblate deformation for this isomer corresponding to a two-quasineutron state, indicating an isomeric structure very similar to that of the neighboring isotones 96Sr and 92Se

Published
2020

24. Spectroscopy and lifetime measurements in Te134,136,138 isotopes and implications for the nuclear structure beyond N=82

Author

Häfner, G., primary, Lozeva, R., additional, Naïdja, H., additional, Lebois, M., additional, Jovančević, N., additional, Thisse, D., additional, Etasse, D., additional, Canavan, R. L., additional, Rudigier, M., additional, Wilson, J. N., additional, Adamska, E., additional, Adsley, P., additional, Babo, M., additional, Belvedere, K., additional, Benito, J., additional, Benzoni, G., additional, Blazhev, A., additional, Boso, A., additional, Bottoni, S., additional, Bunce, M., additional, Chakma, R., additional, Cieplicka-Oryńczak, N., additional, Collins, S. M., additional, Cortés, M. L., additional, Davies, P. J., additional, Delafosse, C., additional, Fallot, M., additional, Fornal, B., additional, Fraile, L. M., additional, Gerst, R.-B., additional, Gjestvang, D., additional, Guadilla, V., additional, Hauschild, K., additional, Henrich, C., additional, Homm, I., additional, Ibrahim, F., additional, Iskra, Ł. W., additional, Jazwari, S., additional, Jolie, J., additional, Korgul, A., additional, Koseoglou, P., additional, Kröll, Th., additional, Kurtukian-Nieto, T., additional, Le-meur, L., additional, Ljungvall, J., additional, Lopez-Martens, A., additional, Matea, I., additional, Matthieu, L., additional, Miernik, K., additional, Nemer, J., additional, Oberstedt, S., additional, Paulsen, W., additional, Piersa, M., additional, Popovitch, Y., additional, Porzio, C., additional, Qi, L., additional, Ralet, D., additional, Regan, P. H., additional, Reygadas Tello, D., additional, Rezynkina, K., additional, Sanchez, V., additional, Schmitt, C., additional, Söderström, P.-A., additional, Sürder, C., additional, Tocabens, G., additional, Vedia, V., additional, Verney, D., additional, Warr, N., additional, Wasilewska, B., additional, Wiederhold, J., additional, Yavahchova, M. S., additional, Zeiser, F., additional, and Ziliani, S., additional

Published
2021
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25. The $\nu$-ball $\gamma$-spectrometer

Author

Lebois, M., Jovančević, N., Thisse, D., Canavan, R., Etasse, D., Rudigier, M., Wilson, J.N., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS]Physics [physics], Hybrid array, LICORNE, γ -spectrometer, FASTER, [formula omitted]-spectrometer, HPGe, Fast neutrons induced reactions, ALTO, LaBr3, LaBr 3
Abstract

International audience; The ν -ballspectrometer is an hybrid array combining high purity co-axial germanium detectors from the french-UK loan pool, clover detectors from the GAMMAPOOL, lanthanum bromide (LaBr 3 :Ce) scintillator detectors belonging to the FATIMA collaboration and phoswitches from the PARIS collaboration. The aim was to couple the excellent energy resolution of germanium detectors to the excellent time resolution of the LaBr 3 detectors. We achieved a total photopeak efficiency of 6.7% at 1.3 MeV, and peak-to-total ratio of 50% for the germanium part of the array. Using the digital acquisition system FASTER, we achieved time resolution of about 250 ps for LaBr 3 . This acquisition system made also possible the use of the calorimetry for reaction selection. It makes ν -ball the first fully digital large fast timing spectrometer with time resolution similar to analogue electronics. The construction began in June 2017 and commissioning was performed in early November 2017. From November 2017 to June 2018, more than 3200 h of beam time were provided by the ALTO facility to perform eight experiments during the campaign. Among them, five weeks of beam time were dedicated to γ spectroscopy of fast neutron induced reactions. In this paper all the technical details about the spectrometer are presented. First steps of the data analysis process are also discussed.

Published
2020

26. gamma-RAY SPECTROSCOPY OF Se-85 PRODUCED IN Th-232 FISSION

Author

Adamska, E, Korgul, A, Fijalkowska, A, Miernik, K, Piersa, M, Canavan, R, Etasse, D, Jovancevic, N, Lebois, M, Rudigier, M, Thisse, D, Wilson, JN, Adsley, P, Algora, A, Babo, M, Belvedere, K, Benito, J, Blazhev, A, Benzoni, G, Boso, A, Bottoni, S, Bunce, M, Chakma, R, Cieplicka-Orynczak, N, Ciemala, M, Collins, S, Cortes, L, Davies, P, Delafosse, C, Fallot, M, Fornal, B, Fraile, LM, Gerst, R-B, Gjestvang, D, Gottardo, A, Guadilla, V, Hafner, G, Hauschild, K, Heine, M, Henrich, C, Homm, I, Ibrahim, F, Iskra, LW, Koseoglou, P, Kroell, T, Kurtukian-Nieto, T, Le-Meur, L, Leoni, S, Ljungvall, J, Lopez-Martens, A, Lozeva, R, Matea, I, Nemer, J, Oberstedt, S, Paulsen, W, Popovitch, Y, Qi, L, Ralet, D, Regan, PH, Tello, D Reygadas, Rezynkina, K, Sanchez-Tembleque, V, Schmitt, C, Soederstroem, P-A, Surder, C, Tocabens, G, Vedia, V, Verney, D, Warr, N, Wasilewska, B, Wiederhold, J, Yavahchova, M, and Zeiser, F

Subjects
Science & Technology, NEUTRON-RICH, Physics, Physical Sciences, Physics, Multidisciplinary
Abstract

ispartof: ACTA PHYSICA POLONICA B vol:51 issue:3 pages:843-848 ispartof: location:POLAND, Piaski status: published

Published
2020

27. Prompt and delayed gamma spectroscopy of neutron-rich Kr94 and observation of a new isomer

Author

Gerst, RB, Blazhev, A., Warr, N., Wilson, J. N., Lebois, M, Jovančević, Nikola, Thisse, D, Canavan, R, Rudigier, M., Etasse, D, Adamska, E, Adsley, P, Algora, A, Babo, M, Belvedere, K, Benito, J, Benzoni, G., Boso, A, Bottoni, S., Bunce, M, Chakma, R, Cieplicka-Oryńczak, N, Courtin, S, Cortés, M. L., Davies, P, Delafosse, C, Fallot, M, Fornal, B., Fraile, L. M., Gjestvang, Dorthea, Gottardo, A, Guadilla, V, Häfner, G., Hauschild, K, Heine, M, Henrich, C., Homm, I, Ibrahim, F, Iskra, ŁW, Ivanov, P, Jazrawi, S, Korgul, A., Koseoglou, P., Kröll, T., Kurtukian-Nieto, T, Le Meur, L, Leoni, S., Ljungvall, J, Lopez-martens, A., Lozeva, R, Matea, I., Miernik, K, Nemer, J, Oberstedt, Stephan, Paulsen, Wanja, Piersa, M, Popovitch, Y, Porzio, C, Qi, L, D, Ralet, Regan, P. H., Reygadas Tello, D, Rezynkina, K., Sánchez-Tembleque, V., Schmitt, Christelle, Söderström, P. A., Sürder, C., Tocabens, G, Vedia, V., Verney, D., Wasilewska, B., Wiederhold, J., Yavachova, M., Zeiser, Fabio, and Ziliani, S.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Physics::Atomic and Molecular Clusters, Nuclear Experiment
Abstract

Prompt and delayed γ-ray spectroscopy of the neutron-rich 94Kr was performed, as part of the fission campaign at the ALTO facility of the IPN Orsay, using the fast-neutron-induced fission reaction 238U(n,f) in combination with the ν-Ball array, a novel hybrid γ spectrometer for energy and lifetime measurements. Several new yrast and nonyrast transitions were observed for the first time, extending the previously known level scheme. Additionally, we report on the observation of a new short-lived isomer at 3444 keV with a half-life of 32(3) ns. The analysis of the Nilsson orbitals obtained from Gogny cranked Hartree-Fock-Bogoliubov calculations suggests a (9−) spin and an oblate deformation for this isomer corresponding to a two-quasineutron state, indicating an isomeric structure very similar to that of the neighboring isotones 96Sr and 92Se.

Published
2020

28. Prompt-fission-neutron spectra in the $^{239}\mathrm{Pu}(\mathit{n},\phantom{\rule{0.28em}{0ex}}\mathit{f})$ reaction

Author

Marini, P., Taieb, J., Laurent, B., Belier, G., Chatillon, A., Etasse, D., Morfouace, P., Devlin, M., Gomez, J.A., Haight, R.C., Kelly, K.J., O'Donnell, J.M., Schmitt, K.T., Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear Reactions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; Prompt-fission-neutron spectra from Pu239 (n,f) were measured with respect to Cf252 spontaneous fission for incident neutron energies from 0.7 to 700MeV at the Weapons Neutron Research facility (WNR) of the Los Alamos Neutron Science Center. A newly designed high-efficiency fission chamber was coupled to the highly segmented Chi-Nu neutron liquid scintillator array to detect neutrons emitted in fission events. The double time-of-flight technique was used to deduce the incident neutron energies from the spallation target and the outgoing-neutron energies from the fission chamber. Prompt-fission-neutron spectra (PFNS) were measured with respect to Cf252 spontaneous fission down to 200keV and up to about 12MeV for all the incident neutron energies with typical total uncertainties well below 2% up to about 7-MeV outgoing-neutron energy. The general trend of PFNS is well reproduced by JEFF3.3 and ENDF evaluations, although a better agreement is found with JEFF3.3. Discrepancies were observed for the low-energy part of the spectra, especially around the opening of the second-, third- and fourth-chance fission. Neutron average kinetic energies as a function of incident neutron energy are obtained experimentally with reported total uncertainties below 0.5%. The measured values agree with the most recent data. The trend is fairly well reproduced by the JEFF3.3 evaluation, although it fails to reproduce the experimental values within their uncertainties.

Published
2020

29. gamma-RAY SPECTROSCOPY OF Se-85 PRODUCED IN Th-232 FISSION

Author

Adamska, E., Korgul, A., Fijalkowska, A., Miernik, K., Piersa, M., Canavan, R., Etasse, D., Jovancevic, N., Lebois, M., Rudigier, M., Thisse, D., Wilson, J. N., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Blazhev, A., Benzoni, G., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Ciemala, M., Collins, S., Cortes, L., Davies, P., Delafosse, C., Fallot, M., Fornal, B., Fraile, L. M., Gerst, R. -B., Gjestvang, D., Gottardo, A., Guadilla, V., Hafner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I., Ibrahim, F., Iskra, L. W., Koseoglou, P., Kroell, T., Kurtukian-Nieto, T., Le-Meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I., Nemer, J., Oberstedt, S., Paulsen, W., Popovitch, Y., Qi, L., Ralet, D., Regan, P. H., Tello, D. Reygadas, Rezynkina, K., Sanchez-Tembleque, V., Schmitt, C., Soederstroem, P. -A., Surder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M., Zeiser, F., Adamska, E., Korgul, A., Fijalkowska, A., Miernik, K., Piersa, M., Canavan, R., Etasse, D., Jovancevic, N., Lebois, M., Rudigier, M., Thisse, D., Wilson, J. N., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Blazhev, A., Benzoni, G., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Ciemala, M., Collins, S., Cortes, L., Davies, P., Delafosse, C., Fallot, M., Fornal, B., Fraile, L. M., Gerst, R. -B., Gjestvang, D., Gottardo, A., Guadilla, V., Hafner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I., Ibrahim, F., Iskra, L. W., Koseoglou, P., Kroell, T., Kurtukian-Nieto, T., Le-Meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I., Nemer, J., Oberstedt, S., Paulsen, W., Popovitch, Y., Qi, L., Ralet, D., Regan, P. H., Tello, D. Reygadas, Rezynkina, K., Sanchez-Tembleque, V., Schmitt, C., Soederstroem, P. -A., Surder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M., and Zeiser, F.

Abstract

Excited states in the neutron-rich Se-85 nucleus have been studied using for the first time a fast neutron-induced fission of Th-232. The experiment was performed at the ALTO facility of the IPN Orsay. Coupling of the LICORNE directional neutron source with the nu-ball high-resolution gamma-ray spectrometer provided unique access to high-spin states in neutron-rich fission fragments from the Th-232(n,f) reaction. A preliminary level scheme of Se-85 was established by the analysis of prompt gamma-gamma-gamma coincidences. Identification of the all known yrast states in Se-85 is the first step towards studies of more neutron-rich Se isotopes.

Published
2020

30. Prompt and delayed gamma spectroscopy of neutron-rich Kr-94 and observation of a new isomer

Author

Gerst, R-B, Blazhev, A., Warr, N., Wilson, J. N., Lebois, M., Jovancevic, N., Thisse, D., Canavan, R., Rudigier, M., Etasse, D., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Courtin, S., Cortes, M. L., Davies, P., Delafosse, C., Fallot, M., Fornal, B., Fraile, L. M., Gjestvang, D., Gottardo, A., Guadilla, V, Haefner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I, Ibrahim, F., Iskra, L. W., Ivanov, P., Jazrawi, S., Korgul, A., Koseoglou, P., Kroell, T., Kurtukian-Nieto, T., Le Meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I, Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Reygadas-Tello, D., Rezynkina, K., Sanchez-Tembleque, V, Schmitt, C., Soederstroem, P-A, Suerder, C., Tocabens, G., Vedia, V., Verney, D., Wasilewska, B., Wiederhold, J., Yavachova, M., Zeiser, F., Ziliani, S., Gerst, R-B, Blazhev, A., Warr, N., Wilson, J. N., Lebois, M., Jovancevic, N., Thisse, D., Canavan, R., Rudigier, M., Etasse, D., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Orynczak, N., Courtin, S., Cortes, M. L., Davies, P., Delafosse, C., Fallot, M., Fornal, B., Fraile, L. M., Gjestvang, D., Gottardo, A., Guadilla, V, Haefner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I, Ibrahim, F., Iskra, L. W., Ivanov, P., Jazrawi, S., Korgul, A., Koseoglou, P., Kroell, T., Kurtukian-Nieto, T., Le Meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I, Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Reygadas-Tello, D., Rezynkina, K., Sanchez-Tembleque, V, Schmitt, C., Soederstroem, P-A, Suerder, C., Tocabens, G., Vedia, V., Verney, D., Wasilewska, B., Wiederhold, J., Yavachova, M., Zeiser, F., and Ziliani, S.

Abstract

Prompt and delayed gamma-ray spectroscopy of the neutron-rich Kr-94 was performed, as part of the fission campaign at the ALTO facility of the IPN Orsay, using the fast-neutron-induced fission reaction U-238(n, f) in combination with the nu-Ball array, a novel hybrid gamma spectrometer for energy and lifetime measurements. Several new yrast and nonyrast transitions were observed for the first time, extending the previously known level scheme. Additionally, we report on the observation of a new short-lived isomer at 3444 keV with a half-life of 32(3) ns. The analysis of the Nilsson orbitals obtained from Gogny cranked Hartree-Fock-Bogoliubov calculations suggests a (9(-)) spin and an oblate deformation for this isomer corresponding to a two-quasineutron state, indicating an isomeric structure very similar to that of the neighboring isotones Sr-96 and Se-92.

Published
2020

31. Lifetime measurement around 132Sn with the ν-Ball array

Author

Häfner, G, primary, Lozeva, R, additional, Blazhev, A, additional, Canavan, R L, additional, Etasse, D, additional, Jolie, J, additional, Jovancevic, N, additional, Gerst, R B, additional, Kröll, Th, additional, Lebois, M, additional, Regan, P H, additional, Rudigier, M, additional, Thisse, D, additional, Warr, N, additional, and Wilson, J N, additional

Published
2020
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32. Prompt-fission-neutron spectra in the Pu239(n,f) reaction

Author

Marini, P., primary, Taieb, J., additional, Laurent, B., additional, Belier, G., additional, Chatillon, A., additional, Etasse, D., additional, Morfouace, P., additional, Devlin, M., additional, Gomez, J. A., additional, Haight, R. C., additional, Kelly, K. J., additional, O'Donnell, J. M., additional, and Schmitt, K. T., additional

Published
2020
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33. \(\gamma \)-ray Spectroscopy of \(^{85}\)Se Produced in \(^{232}\)Th Fission

Author

Adamska, E., primary, Korgul, A., additional, Fijałkowska, A., additional, Miernik, K., additional, Piersa, M., additional, Canavan, R., additional, Etasse, D., additional, Jovančević, N., additional, Lebois, M., additional, Rudigier, M., additional, Thisse, D., additional, Wilson, J.N., additional, Adsley, P., additional, Algora, A., additional, Babo, M., additional, Belvedere, K., additional, Benito, J., additional, Blazhev, A., additional, Benzoni, G., additional, Boso, A., additional, Bottoni, S., additional, Bunce, M., additional, Chakma, R., additional, Cieplicka-Oryńczak, N., additional, Ciemała, M., additional, Collins, S., additional, Cortés, L., additional, Davies, P., additional, Delafosse, C., additional, Fallot, M., additional, Fornal, B., additional, Fraile, L.M., additional, Gerst, R.-B., additional, Gjestvang, D., additional, Gottardo, A., additional, Guadilla, V., additional, Hafner, G., additional, Hauschild, K., additional, Heine, M., additional, Henrich, C., additional, Homm, I., additional, Ibrahim, F., additional, Iskra, Ł.W., additional, Koseoglou, P., additional, Kröll, T., additional, Kurtukian-Nieto, T., additional, Le-meur, L., additional, Leoni, S., additional, Ljungvall, J., additional, Lopez-Martens, A., additional, Lozeva, R., additional, Matea, I., additional, Nemer, J., additional, Oberstedt, S., additional, Paulsen, W., additional, Popovitch, Y., additional, Qi, L., additional, Ralet, D., additional, Regan, P.H., additional, Reygadas Tello, D., additional, Rezynkina, K., additional, Sánchez-Tembleque, V., additional, Schmitt, C., additional, Söderström, P.-A., additional, Surder, C., additional, Tocabens, G., additional, Vedia, V., additional, Verney, D., additional, Warr, N., additional, Wasilewska, B., additional, Wiederhold, J., additional, Yavahchova, M., additional, and Zeiser, F., additional

Published
2020
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34. Characterization and performances of DOSION, a dosimetry equipment dedicated to radiobiology experiments taking place at GANIL

Author

Boissonnat, G., Fontbonne, J. -M., Balanzat, E., Boumard, F., Carniol, B., Cassimi, A., Colin, J., Cussol, D., Etasse, D., Fontbonne, C., Frelin, A. -M., Hommet, J., Peronnel, J., Salvador, S., Laboratoire de physique corpusculaire de Caen ( LPCC ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Ecole Nationale Supérieure d'Ingénieurs de Caen ( ENSICAEN ), Normandie Université ( NU ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de recherche sur les Ions, les MAtériaux et la Photonique ( CIMAP - UMR 6252 ), Normandie Université ( NU ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Centre National de la Recherche Scientifique ( CNRS ), Grand Accélérateur National d'Ions Lourds ( GANIL ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0301 basic medicine, Nuclear and High Energy Physics, medicine.medical_specialty, Radiobiology, Nuclear engineering, medicine.medical_treatment, FOS: Physical sciences, Context (language use), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 03 medical and health sciences, 0302 clinical medicine, [ PHYS.PHYS.PHYS-MED-PH ] Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], Calibration, medicine, Dosimetry, Medical physics, Nuclear Experiment (nucl-ex), [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Instrumentation, Physics, Protocol (science), Particle therapy, Physics - Medical Physics, Characterization (materials science), 030104 developmental biology, 030220 oncology & carcinogenesis, [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], Medical Physics (physics.med-ph)
Abstract

International audience; Currently,radiobiology experiments using heavy ions at GANIL GrandAccélérateurNationald’IonsLourds) are conducted under the supervision of the CIMAP (Center for research on Ions, MAterials and Photonics). In this context, a new beam monitoring equipment named DOSION has been developed. It allows to perform measurements of accurate fluence and dose maps in near real time for each biological sample irradiated. In this paper, we present the detection system, its design, performances, calibration protocol and measurements performed during radiobiology experiments. This setup is currently available for any radiobiology experiments if one wishes to correlate one’s own sample analysis to state of the art dosimetric references.

Published
2017

35. Clusterization and Strong Coulpled-Channels Effects in Deuteron Interaction with 9Be Nuclei

Author

Urazbekov, Bakytzhan, Denikin, A. S., Lukyanov, Sergei, Itaco, N., Janseitov, D., Mendibayev, K., Burjan, Vaclav, Kroha, Vaclav, Mrazek, J., Trzaska, Wlasyslaw, Harakeh, M. N., Etasse, D., Stefan, I., Verney, David, Issatayev, T., Penionzhkevich, YU, Kuterbekov, Kairat, and Zholdybayev, T.

Subjects
double folding, elastic and inelastic scattering, Nuclear Theory, optical model, DWBA, few-nucleon transfer reactions, hiukkasfysiikka, Nuclear Experiment, ydinfysiikka, spectroscopic amplitudes, cluster structure, CRC
Abstract

Angular distributions of protons, deuterons, tritons and alphaparticles emitted in the d + 9Be reaction at Elab=19.5 and 35.0 MeV have been measured. The elastic scattering channel is analysed in the framework of both the Optical Model and the Coupled-Channel approach. The interaction potential of the d + 9Be system is calculated in the framework of the Double-Folding model using the α + α + n three-body wave function of the 9Be nucleus. The (d, p) and (d, t) one-nucleon-transfer reactions are analysed within the coupledreaction-channel approach. The spectroscopic amplitudes for the different nuclear cluster configurations are calculated. Differential cross sections for the reaction channel 9Be(d, α) 7Li are calculated including all possible reaction mechanisms within the coupled-reaction-channel method. Corresponding contributions to the cross sections are analysed. peerReviewed

Published
2019

36. Charge and current-sensitive preamplifiers for pulse shape discrimination techniques with silicon detectors

Author

Hamrita, H., Rauly, E., Blumenfeld, Y., Borderie, B., Chabot, M., Edelbruck, P., Lavergne, L., Le Bris, J., Legou, Th., Le Neindre, N., Richard, A., Rivet, M.F., Scarpaci, J.A., Tillier, J., Barbey, S., Becheva, E., Bocage, F., Bougault, R., Bzyl, R., Grévy, S., Carniol, B., Cussol, D., Désesquelles, P., Etasse, D., Galichet, E., Guinet, D., Lalu, G., Lanzalone, G., Lautesse, Ph., Lopez, O., Martinet, G., Pierre, S., Politi, G., Rosato, E., Tamain, B., and Vient, E.

Published
2004
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37. SPECTROSCOPY OF NEUTRON INDUCED REACTIONS WITH THE nu-BALL SPECTROMETER

Author

Jovanaevic, N., Lebois, M., Wilson, J. N., Thisse, D., Qia, L., Matea, I, Ibrahim, F., Verney, D., Babo, M., Delafosse, C., Adsley, F., Tocabens, G., Gottardo, A., Popovitch, Y., Nemer, J., Canavan, R., Rudigier, M., Belvedere, K., Boso, A., Regan, P., Podolyak, Zs, Shearman, R., Bunce, M., Inavov, P., Oberstedt, S., Lopez-Martens, A., Hauschild, K., Ljungvall, J., Chakma, R., Lozeva, R., Soderstrom, P-A, Oberstedt, A., Etasse, D., Ralet, D., Blazhev, A., Gerst, R-B, Hafner, G., Cieplicka-Orynczak, N., Iskra, L. W., Fornal, B., Benzoni, G., Leoni, S., Bottoni, S., Henrich, C., Koseoglou, P., Wiederhold, J., Homm, I, Surder, C., Kroll, T., Knezevic, D., Dragic, A., Cortes, L., Warr, N., Miernik, K., Adamska, E., Piersa, M., Rezynkina, K., Fraile, L., Garcia, J. Benito, Sanchez, V, Algora, A., Davies, P., Guadilla-Gomez, V, Fallot, M., Kurtukian-Nieto, T., Schmitt, C., Heine, M., Tello, D. Reygadas, Yavachova, M., Diakaki, M., Zeiser, F., Paulson, W., Gestvang, D., Jovanaevic, N., Lebois, M., Wilson, J. N., Thisse, D., Qia, L., Matea, I, Ibrahim, F., Verney, D., Babo, M., Delafosse, C., Adsley, F., Tocabens, G., Gottardo, A., Popovitch, Y., Nemer, J., Canavan, R., Rudigier, M., Belvedere, K., Boso, A., Regan, P., Podolyak, Zs, Shearman, R., Bunce, M., Inavov, P., Oberstedt, S., Lopez-Martens, A., Hauschild, K., Ljungvall, J., Chakma, R., Lozeva, R., Soderstrom, P-A, Oberstedt, A., Etasse, D., Ralet, D., Blazhev, A., Gerst, R-B, Hafner, G., Cieplicka-Orynczak, N., Iskra, L. W., Fornal, B., Benzoni, G., Leoni, S., Bottoni, S., Henrich, C., Koseoglou, P., Wiederhold, J., Homm, I, Surder, C., Kroll, T., Knezevic, D., Dragic, A., Cortes, L., Warr, N., Miernik, K., Adamska, E., Piersa, M., Rezynkina, K., Fraile, L., Garcia, J. Benito, Sanchez, V, Algora, A., Davies, P., Guadilla-Gomez, V, Fallot, M., Kurtukian-Nieto, T., Schmitt, C., Heine, M., Tello, D. Reygadas, Yavachova, M., Diakaki, M., Zeiser, F., Paulson, W., and Gestvang, D.

Abstract

The nu-ball is a high-efficiency hybrid spectrometer which consists of both germanium (Ge) detectors and associated anti-Compton BGO shields, coupled to lanthanum bromide (LaBr3) detectors. The hybrid configuration provides a combination of both excellent energy and timing resolutions. The nu-ball geometry allows the coupling with the LICORNE directional neutron source at the ALTO facility of the IPN, Orsay. This opens the possibility to perform precise spectroscopy of neutron induced reactions and was used for two experiments during the recent experimental campaign. These two experiments are described here: 1. Spectroscopy of the neutron-rich fission fragments produced in the U-238(n, f) and Th-232(n, f) reactions; 2. Spectroscopy above the shape isomer in U-238. The U-238(n, f) and Th-232(n, f) reactions produce hundreds of neutron-rich nuclei on which gamma-ray spectroscopy can be performed. The main goal of the experiment aiming to populate the shape isomer in U-238 is the measurement of the gamma-ray and fission decay branches as well as determination of level scheme in the super-deformed minimum. The shape isomer is populated by U-238(n,n') reaction, which gives a very advantageous population cross section over other reactions. More detailed descriptions of these two nu-ball experiments will be presented here.

Published
2019

38. Neutron and charged particle identification by means of various detectors

Author

Carniol B., Fontbonne C., Orr N.A., Marqués F.M., Ledoux X., Laurent B., Gibelin J., Delaunay F., Achouri N.L., Sénoville M., Chaventré T., Cussol D., Etasse D., Fontbonne J.M., Harang J., Hommet J., Plard H., Poincheval J., Lopez O., Le Neindre N., Borderie B., Rivet M.F., Tassan-Got L., Pawłowski P., Tăbăcaru G., Brauning-Demian A., Perronnel J., Balanzat E., Hamrita H., Randisi G., Dumitriu D., Flueraşu D., Thimont Y., and Pârlog M.

Subjects
Physics, QC1-999
Abstract

Identification methods for photons, neutrons and heavy ions by using scintillator and semiconductor detectors are discussed by stressing the advantages of signal digitization.

Published
2012
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39. New Insight into the Cluster Structure of 9Be by Reactions with Deuteron Beam

Author

Lukyanov, S. M., primary, Urazbekov, B., additional, Janseitov, D. M., additional, Burjan, V., additional, Denikin, A. S., additional, Trzaska, W. H., additional, Harakeh, M., additional, Etasse, D., additional, Issatayev, T., additional, Kroha, V., additional, Maslov, V. A., additional, Mrazek, J., additional, Mendibayev, K., additional, Naumenko, M. A., additional, Siváček, I., additional, Glagolev, V., additional, Piskor, Š., additional, Penionzhkevich, Yu. E., additional, Skobelev, N. K., additional, Stefan, I., additional, Verney, D., additional, Kuterbekov, K., additional, and Zholdybayev, T., additional

Published
2019
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40. Clusterization and strong coupled-channels effects in deuteron interaction with 9Be nuclei

Author

Urazbekov, B A, primary, Denikin, A S, additional, Lukyanov, S M, additional, Itaco, N, additional, Janseitov, D M, additional, Mendibayev, K, additional, Burjan, V, additional, Kroha, V, additional, Mrazek, J, additional, Trzaska, W H, additional, Harakeh, M N, additional, Etasse, D, additional, Stefan, I, additional, Verney, D, additional, Issatayev, T, additional, Penionzhkevich, Yu E, additional, Kuterbekov, K A, additional, and Zholdybayev, T, additional

Published
2019
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41. Spectroscopy of Neutron Induced Reactions with the $\nu $-ball Spectrometer

Author

Jovančević, N., primary, Lebois, M., additional, Wilson, J.N., additional, Thisse, D., additional, Qi, L., additional, Matea, I., additional, Ibrahim, F., additional, Verney, D., additional, Babo, M., additional, Delafosse, C., additional, Adsley, F., additional, Tocabens, G., additional, Gottardo, A., additional, Popovitch, Y., additional, Nemer, J., additional, Canavan, R., additional, Rudigier, M., additional, Belvedere, K., additional, Boso, A., additional, Regan, P., additional, Podolyak, Zs., additional, Shearman, R., additional, Bunce, M., additional, Inavov, P., additional, Oberstedt, S., additional, Lopez-Martens, A., additional, Hauschild, K., additional, Ljungvall, J., additional, Chakma, R., additional, Lozeva, R., additional, Söderström, P.-A., additional, Oberstedt, A., additional, Etasse, D., additional, Ralet, D., additional, Blazhev, A., additional, Gerst, R.-B., additional, Hafner, G., additional, Cieplicka-Oryńczak, N., additional, Iskra, L., additional, Fornal, B., additional, Benzoni, G., additional, Leoni, S., additional, Bottoni, S., additional, Henrich, C., additional, Koseoglou, P., additional, Wiederhold, J., additional, Homm, I., additional, Surder, C., additional, Kroll, T., additional, Knezevic, D., additional, Dragic, A., additional, Cortes, L., additional, Warr, N., additional, Miernik, K., additional, Adamska, E., additional, Piersa, M., additional, Rezynkina, K., additional, Fraile, L., additional, Benito Garcia, J., additional, Sanchez, V., additional, Algora, A., additional, Davies, P., additional, Guadilla-Gomez, V., additional, Fallot, M., additional, Kurtukian-Nieto, T., additional, Schmitt, C., additional, Heine, M., additional, Reygadas Tello, D., additional, Yavachova, M., additional, Diakaki, M., additional, Zeiser, F., additional, Paulson, W., additional, and Gestvang, D., additional

Published
2019
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42. High precision measurement of the $^{19}$Ne $\beta$-decay half-life using real-time digital acquisition

Author

Fontbonne, C., Ujić, P., de Oliveira Santos, F., Fléchard, X., Rotaru, F., Achouri, N.L., Girard Alcindor, V., Bastin, B., Boulay, F., Briand, J.B., Sánchez-Benítez, A.M., Bouzomita, H., Borcea, C., Borcea, R., Blank, B., Carniol, B., Čeliković, I., Delahaye, P., Delaunay, F., Etasse, D., Fremont, G., de France, G., Fontbonne, J.M., Grinyer, G.F., Harang, J., Hommet, J., Jevremović, A., Lewitowicz, M., Martel, I., Mrazek, J., Parlog, M., Poincheval, J., Ramos, D., Spitaels, C., Stanoiu, M., Thomas, J.C., Toprek, D., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de physique corpusculaire de Caen ( LPCC ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Ecole Nationale Supérieure d'Ingénieurs de Caen ( ENSICAEN ), Normandie Université ( NU ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Grand Accélérateur National d'Ions Lourds ( GANIL ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre d'Etudes Nucléaires de Bordeaux Gradignan ( CENBG ), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
12.15.Hh, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], 24.80.+y, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 12.60.-i, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 23.40.-s
Abstract

International audience; The half-life of Ne19 was measured using a real-time digital multiparametric acquisition system, providing an accurate time stamp and relevant information on the detector signals for each decay event. An exhaustive offline analysis of the data gave unique access to experimental effects potentially biasing the measurement. After establishing the influence factors impacting the measurement such as after-pulses, pile-up, gain, and baseline fluctuations, their effects were accurately estimated and the event selection optimized. The resulting half-life, 17.2569±0.0019(stat)±0.0009(syst) s, is the most precise up to now for Ne19. It is found to be in agreement with two recent precise measurements and not consistent with the most recent one [L. J. Broussard , Phys. Rev. Lett. 112, 212301 (2014)PRLTAO0031-900710.1103/PhysRevLett.112.212301] by 3.0 standard deviations. The full potential of the technique for nuclei with half-lives of a few seconds is discussed.

Published
2017

43. γ-RAY SPECTROSCOPY OF 85Se PRODUCEDIN 232Th FISSION.

Author

ADAMSKA, E., KORGUL, A., FIJAŁKOWSKA, A., MIERNIK, K., PIERSA, M., CANAVAN, R., ETASSE, D., JOVANCEVIC, N., LEBOIS, M., RUDIGIER, M., THISSE, D., WILSON, J. N., ADSLEY, P., ALGORA, A., BABO, M., BELVEDERE, K., BENITO, J., BLAZHEV, A., BENZONI, G., and BOSO, A.

Subjects
NEUTRON sources, EXCITED states, RADIOACTIVITY, SPECTROMETRY, ISOTOPES, FAST neutrons
Abstract

Excited states in the neutron-rich85Se nucleus have been studied usingfor the first time a fast neutron-induced fission of 232Th. The experimentwas performed at the ALTO facility of the IPN Orsay. Coupling of the LICORNE directional neutron source with theν-ball high-resolutionγ-rayspectrometer provided unique access to high-spin states in neutron-rich fis-sion fragments from the 232Th (n,f) reaction. A preliminary level scheme of 85Se was established by the analysis of promptγ–γ–γcoincidences. Identi-fication of the all known yrast states in85Se is the first step towards studiesof more neutron-rich Se isotopes. [ABSTRACT FROM AUTHOR]

Published
2020
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44. Cluster Structure of 9Be by Scattering of Deuterons

Author

Lukyanov, S.M., primary, Denikin, A. S., additional, Naumenko, M. A., additional, Burjan, V., additional, Trzaska, W.H., additional, Harakeh, M., additional, Etasse, D., additional, Kroha, V., additional, Mrazek, J., additional, Mendibayev, K., additional, Sivaček, I., additional, Glagolev, V., additional, Piskoř, Š., additional, Penionzhkevich, Yu.E., additional, Skobelev, N.K., additional, Stefan, I., additional, Verney, D., additional, Kuterbekov, K., additional, and Zholdyvayev, T., additional

Published
2018
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45. High precision measurement of the Ne19β -decay half-life using real-time digital acquisition

Author

Fontbonne, C., primary, Ujić, P., additional, de Oliveira Santos, F., additional, Fléchard, X., additional, Rotaru, F., additional, Achouri, N. L., additional, Alcindor, V. Girard, additional, Bastin, B., additional, Boulay, F., additional, Briand, J. B., additional, Sánchez-Benítez, A. M., additional, Bouzomita, H., additional, Borcea, C., additional, Borcea, R., additional, Blank, B., additional, Carniol, B., additional, Čeliković, I., additional, Delahaye, P., additional, Delaunay, F., additional, Etasse, D., additional, Fremont, G., additional, de France, G., additional, Fontbonne, J. M., additional, Grinyer, G. F., additional, Harang, J., additional, Hommet, J., additional, Jevremović, A., additional, Lewitowicz, M., additional, Martel, I., additional, Mrazek, J., additional, Parlog, M., additional, Poincheval, J., additional, Ramos, D., additional, Spitaels, C., additional, Stanoiu, M., additional, Thomas, J. C., additional, and Toprek, D., additional

Published
2017
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46. High precision measurement of the Ne-19 beta-decay half-life using real-time digital acquisition

Author

Fontbonne, C., Ujić, Predrag, de Oliveira Santos, F., Flechard, X., Rotaru, F., Achouri, Lynda N., Girard Alcindor, V., Bastin, B., Boulay, F., Briand, J. B., Sanchez-Benitez, A. M., Bouzomita, H., Borcea, C., Borcea, Ruxandra, Blank, Bertram B., Carniol, B., Čeliković, Igor T., Delahaye, Pierre, Delaunay, F., Etasse, D., Fremont, G., de France, Gilles, Fontbonne, J. M., Grinyer, G. F., Harang, J., Hommet, J., Jevremović, Aleksandar M., Lewitowicz, Marek, Martel, I., Mrazek, Jaromir, Parlog, M., Poincheval, J., Ramos, D., Spitaels, C., Stanoiu, M., Thomas, J. C., Toprek, Dragan, Fontbonne, C., Ujić, Predrag, de Oliveira Santos, F., Flechard, X., Rotaru, F., Achouri, Lynda N., Girard Alcindor, V., Bastin, B., Boulay, F., Briand, J. B., Sanchez-Benitez, A. M., Bouzomita, H., Borcea, C., Borcea, Ruxandra, Blank, Bertram B., Carniol, B., Čeliković, Igor T., Delahaye, Pierre, Delaunay, F., Etasse, D., Fremont, G., de France, Gilles, Fontbonne, J. M., Grinyer, G. F., Harang, J., Hommet, J., Jevremović, Aleksandar M., Lewitowicz, Marek, Martel, I., Mrazek, Jaromir, Parlog, M., Poincheval, J., Ramos, D., Spitaels, C., Stanoiu, M., Thomas, J. C., and Toprek, Dragan

Abstract

The half-life of Ne-19 was measured using a real-time digital multiparametric acquisition system, providing an accurate time stamp and relevant information on the detector signals for each decay event. An exhaustive offline analysis of the data gave unique access to experimental effects potentially biasing the measurement. After establishing the influence factors impacting the measurement such as after-pulses, pile-up, gain, and baseline fluctuations, their effects were accurately estimated and the event selection optimized. The resulting half-life, 17.2569 +/- 0.0019((stat)) +/- 0.0009((syst)) s, is the most precise up to now for Ne-19. It is found to be in agreement with two recent precise measurements and not consistent with the most recent one [L.J. Broussard et al., Phys. Rev. Lett. 112, 212301 (2014)] by 3.0 standard deviations. The full potential of the technique for nuclei with half-lives of a few seconds is discussed.

Published
2017

47. Measurement of thick target neutron yields generated by accelerated heavy ions

Author

Trinh, N.D., Fadil, M., Lewitowicz, M., Delaunay, F., Pârlog, M., Clerc, T., Desmezieres, V., Durand, D., Etasse, D., Grinyer, G., Grinyer, J., Madeline, A., Ledoux, X., Thomas, J.C., Laurent, B., Achouri, N.L., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Lion, Michel

Subjects
ToF technique, Activation foils, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Heavy ion reactions, Thick Target Neutron Yields, Monte-Carlo simulation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; In accelerator facilities, due to their high penetration through matter, neutrons emittedfrom the interaction of high intensity primary beams with thick targets represent a risk ofradiation hazards that needs to be well characterized. The objective of the ongoing TTNY(Thick Target Neutron Yields) experimental program at GANIL is to measure neutron yieldsgenerated by the interaction of heavy ions (12C to 208Pb, from 4 MeV/u to 95 MeV/u)with thick targets (natCu, natNb, natC). Double differential (angular and energy) secondaryneutron spectra are obtained using two techniques: the activation of thin foils and neutronToF measurements. Measurement results are compared to Monte-Carlo transport codes(PHITS and FLUKA) in order to benchmark the physics models implemented in the codesto take into account the wide range of nuclear reactions involved. The data collected duringthe experimental program will also allow improving these physics models. In addition, dataobtained with the niobium target (12C (95MeV/u), natNb) are of high interest for the safetystudies associated with the upgrade of the SPIRAL1 facility at GANIL since this beam andtarget combination is the one considered to evaluate the upper limit of neutron radiationhazards associated with the operation of the facility.

Published
2016

48. Clusterization and strong coupled-channels effects in deuteron interaction with 9Be nuclei.

Author

Urazbekov, B A, Denikin, A S, Lukyanov, S M, Itaco, N, Janseitov, D M, Mendibayev, K, Burjan, V, Kroha, V, Mrazek, J, Trzaska, W H, Harakeh, M N, Etasse, D, Stefan, I, Verney, D, Issatayev, T, Penionzhkevich, Yu E, Kuterbekov, K A, and Zholdybayev, T

Subjects
DEUTERON reactions, ANGULAR distribution (Nuclear physics), DIFFERENTIAL cross sections, DEUTERONS, CLUSTER theory (Nuclear physics), ELASTIC scattering, ALPHA rays
Abstract

Angular distributions of protons, deuterons, tritons and alpha particles emitted in the d + 9Be reaction at Elab = 19.5 and 35.0 MeV have been measured. The elastic scattering channel is analysed in the framework of both the optical model and the coupled-channel approach. The interaction potential of the d + 9Be system is calculated in the framework of the Double-Folding model using the α + α + n three-body wave function of the 9Be nucleus. The (d, p) and (d, t) one-nucleon-transfer reactions are analysed within the coupled-reaction-channel approach. The spectroscopic amplitudes for the different nuclear cluster configurations are calculated. Differential cross sections for the reaction channel 9Be()7Li are calculated including all possible reaction mechanisms within the coupled-reaction-channel method. Corresponding contributions to the cross sections are analysed. [ABSTRACT FROM AUTHOR]

Published
2019
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49. Identification stations

Author

Etasse, D., Guesnon, Sandrine, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics
Published
2010

50. Measurement of the 8Li half-life

Author

Fléchard, X., Liénard, E., Naviliat-Cuncic, O., Rodrıguez, D., Alvarez, M.A.G., Ban, G., Carniol, B., Etasse, D., Fontbonne, J.M., Lallena, A.M., Praena, J., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 21.10.Tg, 27.20.+n
Abstract

We report a newmeasurement of the 8Li half-life using a plastic scintillator and an ultrafastwaveform digitizing module. The result, T1/2 = (838.40 ± 0.36) ms, improves by a factor of 2.5 the most precise result obtained so far and is furthermore deduced with negligible corrections due to dead time.

Published
2010

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