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32 results on '"KMIECIK, M."'

1. Lifetime analysis of short-lived states in $^{17}$N

Author

Ziliani, S., Ciemała, M., Crespi, F. C.L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Oryńczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grȩbosz, J., Harakeh, M. N., Iskra, W., Jacquot, B., Karpov, A., Kicińska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Müller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, C., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Ziȩbliński, M., Zielińska, M., 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), 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 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), Institut Laue-Langevin (ILL), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Ziliani, S., Ciemala, M., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clement, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, C., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., and Research unit Nuclear & Hadron Physics

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

International audience; A recent extension of the Doppler-shift attenuation method to measure short lifetimes of states populated in low-energy binary reactions is applied to the case of 17N. The reliability of the technique is confirmed by measuring the lifetime of the 5515 keV 3/2− state, which is depopulated by two different γ rays. The method is used to measure the lifetime of the 5170 keV (9/2+) state in the same nucleus. Comparisons with large-scale shell-model predictions are given as well.

Published
2020

2. Complete set of bound negative-parity states in the neutron-rich $^{18}$N nucleus

Author

Ziliani, S., Ciema��a, M., Crespi, F. C. L., Leoni, S., Fornal, B., Suzuki, T., Otsuka, T., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Cl��ment, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, ��. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kimi, Y. -H., Kmiecik, M., Lemasson, A., Lewitowicz, M., Lenzi, S., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., M��ller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., 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), 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), Institut Laue-Langevin (ILL), 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; High-resolution γ-ray spectroscopy of N18 is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an O18 beam on a Ta181 target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in N18 below the neutron threshold. Spin and parities are proposed for all located states on the basis of decay branchings and comparison with large-scale shell-model calculations performed in the p-sd space, with the YSOX interaction. Of particular interest is the location of the 01− and 12− excitations, which provide strong constrains for cross-shell p-sd matrix elements based on realistic interactions and help to simultaneously reproduce the ground and first-excited states in N16 and N18, for the first time. Understanding the N18 structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021

3. Coulomb and nuclear excitations of $^{70}$Zn and $^{68}$Ni at intermediate energy

Author

Calinescu, S., Sorlin, O., Matea, I., Carstoiu, F., Dao, D., Nowacki, F., de Angelis, G., Astabatyan, R., Bagchi, S., Borcea, C., Borcea, R., C��ceres, L., Ciem��la, M., Cl��ment, E., Dombr��di, Z., Franchoo, S., Gottardo, A., Gr��vy, S., Guerin, H., Harakeh, M. N., Harca, I. M., Kamalou, O., Kmiecik, M., Krasznahorkay, A., Krzysiek, M., Kuti, I., Lepailleur, A., Lukyanov, S., Maj, A., Maslov, V., Mazurek, K., Morfouace, P., Mrazek, J., Negoita, F., Niikura, M., Olivier, L., Penionzhkevich, Y., Perrot, L., Petrone, C., Podoly��k, Z., Rigollet, C, Roger, T., Rotaru, F., Sohler, D., Stanoiu, M., Stefan, I., Stuhl, L., Thomas, J. C., Vajta, Z., Vandebrouck, M., Wieland, O., 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), 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), 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), 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), 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), 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
Nuclear Theory (nucl-th), Nuclear Theory, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; The reduced transition probabilities $B(E2; 0^+_{g.s.}\rightarrow2_1^+,2^+_2)$ in $^{70}$Zn and the full $B(E2; 0^+_{g.s.}\rightarrow2^+)$ strength up to S$_n$=7.79 MeV in $^{68}$Ni have been determined at the LISE/GANIL facility using the Coulomb-excitation technique at intermediate beam energy on a $^{208}$Pb target. The $\gamma$ rays emitted in-flight were detected with an array of 46 BaF$_2$ crystals. The angles of the deflected nuclei were determined in order to disentangle and extract the Coulomb and nuclear contributions to the excitation of the 2$^+$ states. The measured $B(E2; 0^+_{g.s.}\rightarrow2_1^+)$ of 1432(124) e$^2$fm$^4$ for $^{70}$Zn falls in the lower part of the published values which clustered either around 1600 or above 2000 e$^2$fm$^4$, while the $B(E2; 0^+_{g.s.}\rightarrow2^+_2)$ of 53(7) e$^2$fm$^4$ agrees very well with the two published values. The relatively low $B(E2; 0^+_{g.s.}\rightarrow2_1^+)$ of 301(38) e$^2$fm$^4$ for $^{68}$Ni agrees with previous studies and confirms a local magicity at $Z=28, N=40$. Combining the results of the low-energy spectra of $^{68}$Ni and $^{70}$Zn and their shell-model interpretations, it is interesting to notice that four different shapes (spherical, oblate, prolate and triaxial) are present. Finally, a summed $E2$ strength of only about 150 e$^2$fm$^4$ has been found experimentally at high excitation energy, likely due to proton excitations across the $Z=28$ gap. The experimental distribution of this high-energy $E2$ excitation agrees with SM calculations, but its strength is about two times weaker.

Published
2021

4. Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2 + state in C 16 and O 20

Author

Ciemała, M., Ziliani, S., Crespi, F., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Oryńczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grębosz, J., Harakeh, M., Iskra, Ł., Jacquot, B., Karpov, A., Kicińska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Müller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D., Palit, R., Rejmund, M., Schmitt, CH., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielińska, M., Ataç, A., Barrientos, D., Birkenbach, B., Boston, A., Cederwall, B., Charles, L., Collado, J., Cullen, D., Désesquelles, P., Domingo-Pardo, C., Dudouet, J., Eberth, J., González, V., Goupil, J., Harkness-Brennan, L., Hess, H., Judson, D., Jungclaus, A., Korten, W., Labiche, M., Lefevre, A., Menegazzo, R., Mengoni, D., Nyberg, J., Perez-Vidal, R., Podolyak, Zs., Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M., Sanchis, E., Stezowski, O., Theisen, Ch., Valiente-Dobón, J., Holt, J., Menéndez, J., Schwenk, A., Simonis, J., Institut Pluridisciplinaire Hubert Curien (IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

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

International audience

Published
2020

5. Testing $ab initio$ nuclear structure in neutron-rich nuclei: lifetime measurements of second 2$^+$ states in $^{16}$C and $^{20}$O

Author

Ciemala, M., Ziliani, S., Crespi, F.C.L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., de France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M.N., Iskra, L.W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S.M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D.R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., Atac, A., Barrientos, D., Birkenbach, B., Boston, A.J., Cederwall, B., Charles, L., Collado, J., Cullen, D.M., Desesquelles, P., Domingo-Pardo, C., Dudouet, J., Eberth, J., Gonzalez, V., Goupil, J., Harkness-Brennan, L.J., Hess, H., Judson, D.S., Jungclaus, A., Korten, W., Labiche, M., Lefevre, A., Menegazzo, R., Mengoni, D., Nyberg, J., Perez-Vidal, R.M., Podolyak, Zs., Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M.D., Sanchis, E., Stezowski, O., Theisen, Ch., Valiente-Dobon, J.J., Holt, J.D., Menendez, J., Schwenk, A., Simonis, J., 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), 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), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), ILL, 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 National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear Theory (nucl-th), nucl-th, Nuclear Theory, Nuclear Physics - Theory, Starke Wechselwirkung und exotische Kerne – Abteilung Blaum, FOS: Physical sciences, Nuclear Physics - Experiment, ddc:530, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Nuclear Structure, Nuclear Experiment
Abstract

To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2+ state in neutron-rich O20,τ(22+)=150−30+80fs, and an estimate for the lifetime of the second 2+ state in C16 have been obtained for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds of femtoseconds range by analyzing the Doppler-shifted γ-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction O18(7.0MeV/u)+Ta181. The requested sensitivity could only be reached owing to the excellent performances of the Advanced γ-Tracking Array AGATA, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The experimental lifetimes agree with predictions of ab initio calculations using two- and three-nucleon interactions, obtained with the valence-space in-medium similarity renormalization group for O20 and with the no-core shell model for C16. The present measurement shows the power of electromagnetic observables, determined with high-precision γ spectroscopy, to assess the quality of first-principles nuclear structure calculations, complementing common benchmarks based on nuclear energies. The proposed experimental approach will be essential for short lifetime measurements in unexplored regions of the nuclear chart, including r-process nuclei, when intense beams, produced by Isotope Separation On-Line (ISOL) techniques, become available. To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2+ state in neutron-rich 20O, tau(2+_2 ) = 150(+80-30) fs, and an estimate for the lifetime of the second 2+ state in 16C have been obtained, for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds femtoseconds range, by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction 18O (7.0 MeV/u) + 181Ta. The requested sensitivity could only be reached owing to the excellent performances of the AGATA gamma-tracking array, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The experimental lifetimes agree with predictions of ab initio calculations using two- and three-nucleon interactions, obtained with the valence-space in-medium similarity renormalization group for 20O, and with the no-core shell model for 16C. The present measurement shows the power of electromagnetic observables, determined with high-precision gamma spectroscopy, to assess the quality of first-principles nuclear structure calculations, complementing common benchmarks based on nuclear energies. The proposed experimental approach will be essential for short lifetimes measurements in unexplored regions of the nuclear chart, including r-process nuclei, when intense ISOL-type beams become available.

Published
2020

6. Lifetime measurements of short-lived excited states, and shape changes in $^{69}\mathrm{As}$ and $^{66}\mathrm{Ge}$ nuclei

Author

Matejska-Minda, M., Bednarczyk, P., Fornal, B., Xu, F.R., Liang, W.Y., De Angelis, G., Aydin, S., Brambilla, S., Ciemała, M., Farnea, E., Hüyük, T., Jaworski, G., Kmiecik, M., Krzysiek, M., Leoni, S., Maj, A., Menegazzo, R., Męczyński, W., Michelagnoli, C., Palacz, M., Recchia, F., Sahin, E., Styczeń, J., Szpak, B., Ur, C.A., Wadsworth, R., Ziębliński, M., Institut Laue-Langevin (ILL), and ILL

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

International audience; Background: The nuclear shape is a macroscopic feature of an atomic nucleus that is sensitive to the underlying nuclear structure in terms of collectivity and the interaction between nucleons. Therefore, the evolution of nuclear shapes has attracted many theoretical and experimental nuclear structure studies. The structure of the A≈70, N≈Z nuclei, lying far from the stability line, is interesting because a particularly strong proton-neutron correlation may occur here due to the occupation of the same orbits by nucleons of both types. In this region, different particle configurations drive a nucleus towards various deformed shapes: prolate, oblate, octupole, or nonaxial. These nuclear shapes change rapidly with nucleon number and also with angular momentum. This is reflected by a presence of different structures (bands) of excited states which exhibit a broad range of lifetimes. Purpose: The aim of this paper is to determine lifetimes of some high-spin excited states in As69 and Ge66 nuclei to examine the shape evolution in these neutron-deficient nuclei. Methods: Lifetimes of high-spin states in As69 and Ge66 have been measured by using the Doppler-shift attenuation technique with the GASP and recoil filter detector setup at the Laboratori Nazionali di Legnaro. The nuclei of interest were produced in the S32(95MeV)+0.8mg/cm2 Ca40 fusion-evaporation reaction. The strongest reaction channels 3p and α2p led to the As69 and Ge66 final nuclei, respectively. Using γ-γ-recoil coincidences we were able to determine very short lifetimes (in the femtosecond range) in the residual nuclei of interest. Results: In As69, the extracted lifetimes are τ=72 (−32, +45) fs for the 33/2+ state at 7897 keV and τ

Published
2019

7. Charged particle decay of hot and rotating $^{88}$Mo nuclei in fusion-evaporation reactions

Author

Valdre, S., Piantelli, S., Casini, G., Barlini, S., Carboni, S., Ciemała, M., Kmiecik, M., Maj, A., Mazurek, K., Cinausero, M., Gramegna, F., Kravchuk, V.L., Morelli, L., Marchi, T., Baiocco, G., Bardelli, L., Bednarczyk, P., Benzoni, G., Bini, M., Blasi, N., Bracco, A., Brambilla, S., Bruno, M., Camera, F., Chbihi, A., Corsi, A., Crespi, F.C.L., D’Agostino, M., Degerlier, M., Fabris, D., Fornal, B., Giaz, A., Krzysiek, M., Leoni, S., Matejska-Minda, M., Mazumdar, I., Meczynski, W., Million, B., Montanari, D., Myalski, S., Nicolini, R., Olmi, A., Pasquali, G., Prete, G., Roberts, O.J., Styczen, J., Szpak, B., Wasilewska, B., Wieland, O., Wieleczko, J.P., Zieblinski, M., 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), 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
FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

A study of fusion-evaporation and (partly) fusion-fission channels for the $^{88}$Mo compound nucleus, produced at different excitation energies in the reaction $^{48}$Ti + $^{40}$Ca at 300, 450 and 600 MeV beam energies, is presented. Fusion-evaporation and fusion-fission cross sections have been extracted and compared with the existing systematics. Experimental data concerning light charged particles have been compared with the prediction of the statistical model in its implementation in the Gemini++ code, well suited even for high spin systems, in order to tune the main model parameters in a mass region not abundantly covered by exclusive experimental data. Multiplicities for light charged particles emitted in fusion evaporation events are also presented. Some discrepancies with respect to the prediction of the statistical model have been found for forward emitted $\alpha$-particles; they may be due both to pre-equilibrium emission and to reaction channels (such as Deep Inelastic Collisions, QuasiFission/QuasiFusion) different from the compound nucleus formation., Comment: 14 pages, 14 figures

Published
2016

8. 1(-) and 2(+) discrete states in Zr-90 populated via the (O-17, O-17 'gamma) reaction

Author

Crespi, F.C.L., Bracco, A., Nicolini, R., Lanza, E.G., Vitturi, A., Mengoni, D., Leoni, S., Benzoni, G., Blasi, N., Boiano, C., Bottoni, S., Brambilla, S., Camera, F., Corsi, A., Giaz, A., Million, B., Pellegri, L., Vandone, V., Wieland, O., Bednarczyk, P., Ciemala, M., Kmiecik, M., Krzysiek, M., Maj, A., Bazzacco, D., Bellato, M., Birkenbach, B., Bortolato, D., Calore, E., Cederwall, B., De Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Gorgen, A., Gottardo, A., Hess, H., Isocrate, R., Jolie, J., Jungclaus, A., Kempley, R.S., Labiche, M., Menegazzo, R., Michelagnoli, C., Molini, P., Napoli, D.R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Sahin, E., Siem, S., Soderstrom, P.A., Stezowski, O., Theisen, C., Ur, C., Valiente-Dobon, J.J., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
PYGMY DIPOLE RESONANCE, [PHYS]Physics [physics], EXCITATION, SCATTERING, ARRAY, GIANT-RESONANCES, PB-208, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], PHOTON DECAY
Abstract

International audience; 2(+) and 1(-) states in Zr-90 were populated via the (O-17, O-17 'gamma) reaction at 340 MeV. The gamma decay was measured with high resolution using the AGATA (advanced gamma tracking array demonstrator array). Differential cross sections were obtained at few different angles for the scattered particle. The results of the elastic scattering and inelastic excitation of 2(+), 3(,)(-) and 1(-) states are compared with distorted-wave Born approximation (DWBA) calculations, using both the standard collective form factor and a form factor obtained by folding microscopically calculated transition densities. This allowed to extract the isoscalar component of the 1(-) state at 6.424 MeV. The comparison of the present (17O, 17O 'gamma) data with existing (gamma,gamma') and (p, p') data in the corresponding region of the gamma continuum (6-11 MeV), characterized by a large E1 component, shows completely different behaviors of the cross section as a function of the nuclear excitation energy. The comparison of the data with DWBA calculations suggests a decrease of the isoscalar strength in the cross section with increasing excitation energy.

Published
2015

9. Giant dipole resonance built on hot rotating nuclei produced during evaporation of light particlesfrom the $^{88}$Mo compound nucleus

Author

Ciemala, M., Kmiecik, M., Maj, A., Mazurek, K., Bracco, A., Kravchuk, V.L., Casini, G., Barlini, S., Baiocco, G., Bardelli, L., Bednarczyk, P., Benzoni, G., Bini, M., Blasi, N., Brambilla, S., Bruno, M., Camera, F., Carboni, S., Cinausero, M., Chbihi, A., Chiari, M., Corsi, A., Crespi, F.C.L., D’Agostino, M., Degerlier, M., Fornal, B., Giaz, A., Gramegna, F., Krzysiek, M., Leoni, S., Marchi, T., Matejska-Minda, M., Mazumdar, I., Meczynski, W., Million, B., Montanari, D., Morelli, L., Myalski, S., Nannini, A., Nicolini, R., Pasquali, G., Piantelli, S., Prete, G., Roberts, O. J., Schmitt, C., Styczen, J., Szpak, B., Valdre, S., Wasilewska, B., Wieland, O., Wieleczko, J.P., Zieblinski, M., Dudek, J., Dang, N. Dinh, 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 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), 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
Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 21.10.Re, 24.30.Cz, 25.70.Gh, 27.50.+e
Abstract

International audience; High-energy giant dipole resonance (GDR) γ rays were measured following the decay of the hot, rotatingcompound nucleus of 88Mo, produced at excitation energies of 124 and 261 MeV. The reaction 48Ti+ 40Ca at 300and 600 MeV bombarding energies has been used. The data were analyzed using the statistical modelMonte Carlocode GEMINI++. It allowed extracting the giant dipole resonance parameters by fitting the high-energy γ -rayspectra. The extracted GDR widths were compared with the available data at lower excitation energy and withtheoretical predictions based on (i) The Lublin-Strasbourg drop macroscopic model, supplemented with thermalshape fluctuations analysis, and (ii) The phonon damping model. The theoretical predictions were convolutedwiththe population matrices of evaporated nuclei from the statistical model GEMINI++. Also a comparison with theresults of a phenomenological expression based on the existing systematics, mainly for lower temperature data,is presented and discussed. A possible onset of a saturation of the GDR width was observed around T = 3 MeV.

Published
2015

10. 1− and 2+ discrete states in Zr90 populated via the (O17,O′17γ) reaction

Author

Crespi, F.C.L., Bracco, A., Nicolini, R., Lanza, E.G., Vitturi, A., Mengoni, D., Leoni, S., Benzoni, G., Blasi, N., Bottoni, C. Boiano S., Brambilla, S., Camera, F., Corsi, A., Giaz, A., Million, B., Pellegri, L., Vandone, V., Wieland, O., Bednarczyk, P., Ciemała, M., Kmiecik, M., Krzysiek, M., Maj, A., Bazzacco, D., Bellato, M., Birkenbach, B., Bortolato, D., Calore, E., Cederwall, B., Angelis, G. De, Désesquelles, P., Eberth, J., Farnea, E., Gadea, A., Görgen, A., Gottardo, A., Hess, H., Isocrate, R., Jolie, J., Jungclaus, A., Kempley, R.S., Labiche, M., Menegazzo, R., Michelagnoli, C., Molini, P., Napoli, D.R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Sahin, E., Siem, S., Söderström, P.-A., Stezowski, O., Theisen, Ch., Ur, C., Valiente-Dobón, J.J., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, SCATTERING, ARRAY, PYGMY DIPOLE RESONANCE, GIANT-RESONANCES, PHOTON DECAY, EXCITATION, PB-208, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; 2+ and 1− states in Zr90 were populated via the (O17,O′17γ) reaction at 340 MeV. The γ decay was measured with high resolution using the AGATA (advanced γ tracking array demonstrator array). Differential cross sections were obtained at few different angles for the scattered particle. The results of the elastic scattering and inelastic excitation of 2+,3−, and 1− states are compared with distorted-wave Born approximation (DWBA) calculations, using both the standard collective form factor and a form factor obtained by folding microscopically calculated transition densities. This allowed to extract the isoscalar component of the 1− state at 6.424 MeV. The comparison of the present (O17,O′17γ) data with existing (γ,γ′) and (p,p′) data in the corresponding region of the γ continuum (6–11 MeV), characterized by a large E1 component, shows completely different behaviors of the cross section as a function of the nuclear excitation energy. The comparison of the data with DWBA calculations suggests a decrease of the isoscalar strength in the cross section with increasing excitation energy.

Published
2015

11. Pygmy dipole resonance in Sn-124 populated by inelastic scattering of O-17

Author

Pellegri, L., Bracco, A., Crespi, F. C. L., Leoni, S., Camera, F., Lanza, E. G., Kmiecik, M., Maj, A., Avigo, R., Benzoni, G., Blasi, N. a, Boiano, C., Bottoni, S., Brambilla, S., Ceruti, S., Giaz, A., Million, B., Morales, A. I., Nicolini, R., Vandone, V., Wieland, O., Bazzacco, D., Bednarczyk, P., Bellato, M., Birkenbach, B., Bortolato, D., Cederwall, B., Charles, L., Ciemala, M., De Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Gernhaeuser, R., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., Isocrate, R., Jolie, J., Judson, D., Jungclaus, A., Karkour, N., Krzysiek, M., Litvinova, E., Lunardi, S., Mazurek, K., Mengoni, D., Michelagnoli, C., Menegazzo, R., Molini, P., Napoli, D. R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Salsac, M. D., Siebeck, B., Siem, S., Simpson, J., Söderström, P. -A, Stezowski, O., Theisen, Ch., Ur, C., Dobon, J. J. Valiente, Zieblinski, M., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], NUCLEI, Low-lying electric dipole excitations Sn-124, Astrophysics::High Energy Astrophysical Phenomena, Physical Sciences, STRENGTH, Fysik, ARRAY, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Isospin character
Abstract

International audience; The gamma decay from the high-lying states of Sn-124 was measured using the inelastic scattering of O-17 at 340 MeV. The emitted gamma rays were detected with high resolution with the AGATA demonstrator array and the scattered ions were detected in two segmented Delta E-E silicon telescopes. The angular distribution was measured both for the gamma rays and the scattered O-17 ions. An accumulation of E1 strength below the particle threshold was found and compared with previous data obtained with (gamma,gamma') and (alpha,alpha'gamma) reactions. The present results of elastic scattering, and excitation of E2 and E1 states were analysed using the DWBA approach. From this comprehensive description the isoscalar component of the 1-excited states was extracted. The obtained values are based on the comparison of the data with DWBA calculations including a form factor deduced using a microscopic transition density. (C) 2014 The Authors. Published by Elsevier B.V.

Published
2014

12. Isospin Character of Low-Lying Pygmy Dipole States in Pb208 via Inelastic Scattering of O17 Ions

Author

Crespi, F. C. L., Bracco, A., Nicolini, R., Mengoni, D., Pellegri, L., Lanza, E. G., Leoni, S., Maj, A., Kmiecik, M., Avigo, R., Benzoni, G., Blasi, N., Boiano, C., Bottoni, S., Brambilla, S., Camera, F., Ceruti, S., Giaz, A., Million, B., Morales, A. I., Vandone, V., Wieland, O., Bednarczyk, P., Ciemala, M., Grebosz, J., Krzysiek, M., Mazurek, K., Zieblinski, M., Bazzacco, D., Bellato, M., Birkenbach, B., Bortolato, D., Calore, E., Cederwall, B., Charles, L., Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Gorgen, A., Gottardo, A., Isocrate, R., Jolie, J., Jungclaus, A., Karkour, N., Wolfram KORTEN, Menegazzo, R., Michelagnoli, C., Molini, P., Napoli, D. R., Pullia, A., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M. D., Siebeck, B., Siem, S., Simpson, J., Soderstrom, P. A., Stezowski, O., Theisen, Ch, Ur, C., Valiente-Dobon, J. J., Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania = University of Catania (Unict), 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), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM ELEC, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Università degli studi di Catania [Catania], Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 24.30.Cz, 24.10.Eq, 25.55.Ci, 27.80.+w
Abstract

The properties of pygmy dipole states in Pb208 were investigated using the Pb208(O17, O17'γ) reaction at 340 MeV and measuring the γ decay with high resolution with the AGATA demonstrator array. Cross sections and angular distributions of the emitted γ rays and of the scattered particles were measured. The results are compared with (γ, γ′) and (p, p′) data. The data analysis with the distorted wave Born approximation approach gives a good description of the elastic scattering and of the inelastic excitation of the 2+ and 3− states. For the dipole transitions a form factor obtained by folding a microscopically calculated transition density was used for the first time. This has allowed us to extract the isoscalar component of the 1− excited states from 4 to 8 MeV.

Published
2014

13. Measurement of light charged particles in the decay channels of medium-mass excited compound nuclei

Author

Valdré, S., Bardelli, L., Barlini, S., Bini, M., Carboni, S., Casini, G., Nannini, A., Pasquali, G., Piantelli, S., Poggi, G., Cinausero, M., Degerlier, M., Gramegna, F., L. Kravchuk, V., Marchi, T., Montanari, D., Baiocco, G., Bruno, M., d'Agostino, M., Morelli, L., Vannini, G., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Camera, F., Corsi, A., Crespi, F., Leoni, S., Million, B., Nicolini, R., Wieland, O., Bednarczyk, P., Ciemała, M., Fornal, B., Kmiecik, M., Maj, A., Matejska, M., Mazurek, K., Meczynski, W., Myalski, S., Styczen, J., Zieblinski, M., Dudek, J., Wieleczko, J.P., 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), 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), and Lion, Michel

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

The 48Ti on 40Ca reactions have been studied at 300 and 600 MeV using the Tandem-ALPI accelerator complex at Laboratori Nazionali di Legnaro. The reactions have been analyzed focusing on the fusion-evaporation (FE) and fusion-fission (FF) exit channels, which dominates in symmetric entrance channel collision at moderate bombarding energies. In particular, the energy spectra, angular distributions, and multiplicities of the emitted light charged particles in the two reaction channels FE and FF will be discussed. An estimation of the absolute cross sections for both channels will be also given. The experimental results will be then compared to Monte Carlo simulations based on the statistical model. The comparison between the results obtained from the same system populated at two excitation energies is important to evidence the possible growing of non-equilibrium effects. At the lower energy complete fusion is expected to exhaust almost the whole central collision cross section, with a consequent negligible non-equilibrium emission. This reaction may therefore be used to keep under control the statistical code parameters. Results on the comparison between the two reactions energies will be discussed. Indeed, very few data exist in literature which are coming from coincidence measurements between evaporation residues and light charged particles for compound nuclei with mass A < 150. That is why statistical model parameters are not completely tested in this mass region. The present work, which deals with the de-excitation of 88Mo, is therefore very interesting because experimental results will help in refining the statistical description of the decay of hot and rotating nuclei with moderate size.

Published
2013

14. Global properties of K hindrance probed by the gamma decay of the warm rotating W-174 nucleus

Author

Vandone, V., Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Boiano, C., Bottoni, S., Camera, F., Corsi, A., Crespi, F.C.L., Giaz, A., Million, B., Nicolini, R., Pellegri, L., Pullia, A., Wieland, O., Bortolato, D., De Angelis, G., Calore, E., Gottardo, A., Maron, G., R. Napoli, D., Rosso, D., Sahin, E., Valiente-Dobon, J.J., Bazzacco, D., Bellato, M., Farnea, E., Lunardi, S., Menegazzo, R., Mengoni, D., Molini, P., Michelagnoli, C., Montanari, D., Recchia, F., Ur, C.A., Gadea, A., Huyuk, T., Cieplicka, N., Maj, A., Kmiecik, M., Atac, A., Akkoyun, S., Kaskas, A., Soederstroem, P.A., Birkenbach, B., Cederwall, B., J. Coleman-Smith, P., M. Cullen, D., Desesquelles, P., Eberth, J., Gorgen, A., Grebosz, J., Hess, H., Judson, D., Jungclaus, A., Karkour, N., Nolan, P., Obertelli, A., Reiter, P., D. Salsac, M., Stezowski, O., Theisen, C., Matsuo, M., Vigezzi, E., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
ATOMIC-NUCLEI, [PACS] γ transitions and level energies, RAYS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ISOMERS, REGION, FLUCTUATION, ALIGNMENT, STATES, [PACS] Collective levels, SPECTRA, [PACS] Collective models, QUANTUM NUMBER
Abstract

The K hindrance to the gamma decay is studied in the warm rotating W-174 nucleus, focusing on the weakening of the selection rules of the K quantum number with increasing excitation energy. W-174 was populated by the fusion reaction of Ti-50 (at 217 MeV) on a Te-128 target, and its gamma decay was detected by the AGATA Demonstrator array coupled to a BaF2 multiplicity filter at Laboratori Nazionali di Legnaro of INFN. A fluctuation analysis of gamma coincidence matrices gives a similar number of low-K and high-K discrete excited bands. The results are compared to simulations of the gamma-decay flow based on a microscopic cranked shell model at finite temperature in which the K mixing is governed by the interplay of Coriolis force with the residual interaction. Agreement between simulations and experiment is obtained only by hindering the E1 decay between low-K and high-K bands by an amount compatible with that determined by spectroscopic studies of K isomers in the same mass region, with a similar trend with excitation energy. The work indicates that K mixing due to temperature effects may play a leading role for the entire body of discrete excited bands, which probes the onset region of K weakening. ©2013 American Physical Society, Support was also given by the Generalitat Valenciana (Spain) under Grant No. PROMETEO/2010/101, by MINECO (Spain) under Grants No. AIC-D-2011-0746 and No. FPA2011-29854, by the Polish National Center of Science (Grant No. 2011/03/B/ST2/01894), and by the Polish Ministry of Science and Higher Education (Grant No. DPN/N190/AGATA/2009).

Published
2013

15. Testing of the PARIS LaBr3-NaI phowich detector with high energy gamma-rays

Author

Ziębliński, M., Jastrząb, M., Dokania, Neha, Nanal, V., Brambilla, S., Bednarczyk, P., Ciemała, M., Dutkiewicz, E., Kmiecik, M., Krzysiek, M., Lekki, J., Maj, A., Szklarz, Z., Wasilewska, B., Dudeło, M., Hadyńska-Klęk, K., Napiorkowski, P., Genolini, B., Schmitt, C., Catford, W., Nakhostin, M., Yavuzkanat, N., Dorvaux, O., Pillay, R.G., Pose, M.S., Mishra, S., Mathimalar, S., Singh, V., Katyan, N., Chakrabarty, D.R., Datar, V.M., Kumar, Suresh, Mishra, G., Mukhopadhyay, S., Pandit, D., Erturk, S., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-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), 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), 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), and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 29.40.Mc, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; We report on tests of LaBr3:Ce-NaI:Tl phoswich detectors with $\gamma$-rays at various $\gamma$-ray energies, up to 22.56 MeV, using radioactive sources and nuclear reactions induced by proton beams delivered by accelerators at IFJ PAN Kraków and PLF Mumbai. Two-dimensional analysis of complex waveforms recorded with digital electronics is compared to analog discrimination methods. Both approaches allow to resolve the LaBr3:Ce and NaI:Tl signal components, and to construct clean associated $\gamma$-ray spectra. A digital algorithm to be implemented for the PARIS scintillator array is investigated.

Published
2012

16. Study of Isomer Production Rates for A=142-152 and Z=62-67 in Fragmentation of a Relativistic 208Pb Beam

Author

Podolyák, Zs., Steer, S.J., Piétri, S., Werner-Malento, E., Regan, P.H., Rudolph, D., Garnsworthy, A.B., Hoischen, R., Górska, M., Gerl, J., Wollersheim, H.J., Kurtukian Nieto, T., Benzoni, G., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Geissel, H., Grebosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tashenov, S., Heinz, A., Pfützner, M., Hellström, M., Jungclaus, A., Andersson, L.-L., Atanasova, L., Balabanski, D.L., Bentley, M.A., Blank, Bertram, Blazhev, A., Brandau, C., Brown, J., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombrádi, Zs., Estevez, E., Fahlander, C., Gelletly, W., Ilie, G., Johansson, E.K., Jolie, J., Jones, G.A., Kmiecik, M., Kondev, F.G., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Shizuma, T., Simons, A.J., Schwertel, S., Walker, P.M., Wieland, O., Brown, B.A., Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and 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)-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)

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

NUCLEAR REACTIONS 9Be(208Pb, X)195Pb/196Pb/192Tl/202Po/188Hg/200Po/192Pb/194Pb/198Po/200Po/195Bi/197Bi/193Pb/206Pb/203Tl/205Tl/205Pb/211Bi/204Tl/142Sm/143Eu/145Eu/144Eu/144Gd/152Ho/153Ho/147Gd/148Tb/177Ta/136Sm/138Gd/174Hf/175Hf/176Hf/175Ta/177Ta/179W/181W/181Re/185Re/176Ta/180W/206Hg/182W/200Pt/179Ta/180Ta/203Hg/203Au, E=1 GeV/nucleon; measured reaction products; deduced J, π, isomeric states and ratios. Comparison with theoretical predictions.

Published
2012

17. Towards the Determination of Superdeformation in 42Ca

Author

Hadyńska-Klęk, K., Napiorkowski, P.J., Maj, A., Azaiez, F., Kicińska-Habior, M., Valiente-Dobón, J.J., de Angelis, G., Abraham, T., Anil Kumar, G., Arnés, B.-Q., Bazzacco, D., Bellato, M., Bortolato, D., Bednarczyk, P., Benzoni, G., Berti, L., Birkenbach, B., Bruyneel, B., Brambilla, S., Camera, F., Chavas, J., Ciemała, M., Cocconi, P., Coleman-Smith, P., Colombo, A., Corsi, A., Crespi, F.C.L., Cullen, D.M., Czermak, A., Désesquelles, P., Dulny, B., Eberth, J., Farnea, E., Fornal, B., Franchoo, S., Gadea, A., Giaz, A., Gottardo, A., Grave, X., Grębosz, J., Gulmini, M., Habermann, T., Isocrate, R., Iwanicki, J., Jaworski, G., Jungclaus, A., Karkour, N., Kmiecik, M., Karpiński, D., Kisieliński, M., Kondratyev, N., Korichi, A., Komorowska, M., Kowalczyk, M., Korten, W., Krzysiek, M., Lehaut, G., Leoni, S., Lopez-Martens, A., Lunardi, S., Maron, G., Mazurek, K., Menegazzo, R., Mengoni, D., Merchán, E., Męczyński, W., Michelagnoli, C., Mierzejewski, J., Million, B., Molini, P., Myalski, S., Napoli, D.R., Nicolini, R., Niikura, M., Obertelli, A., Özmen, S.F., Palacz, M., Pullia, A., Rampazzo, G., Recchia, F., Redon, N., Reiter, P., Rosso, D., Rusek, K., Sahin, E., Salsac, M.-D., Söderström, P.-A., Srebrny, J., Stefan, I., Stézowski, O., Styczeń, J., Theisen, Ch., Toniolo, N., Ur, C.A., Vandone, V., Wadsworth, R., Wasilewska, B., Wiens, A., Wrzosek-Lipska, K., Zielińska, M., Ziębliński, M., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM ELEC, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 25.70.De, 29.30.Kv, 21.10.Re, 21.10.Ky
Abstract

International audience; The Coulomb excitation experiment to study electromagnetic structure of low-lying states in Ca-42 with a focus on a possible superdeformation in this nucleus was performed at the Laboratori Nazionali di Legnaro in Italy. Preliminary values of the determined quadrupole deformation parameters for both the ground state band and the presumed superdeformed band are presented. DOI:10.5506/APhysPolB.44.617

Published
2012

18. Lifetime measurement of $2^+_1$ state in $^{74}$Zn with differential Plunger technique

Author

Niikura, M., Mouginot, B., Azaiez, F., de Angelis, G., Assié, M., Bednarczyk, P., Borcea, C., Burger, A., Burgunder, G., Buta, A., Caceres, L., Clément, E., Coquard, L., de France, G., de Oliveira Santos, Francois, Dewald, A., Dijon, A., Dombradi, Z., Fiori, E., Franchoo, S., Fransen, C., Friessner, G., Gaudefroy, L., Georgiev, G., Grévy, S., Hackstein, M., Harakeh, M.N., Ibrahim, F., Kmiecik, M., Lozeva, Radomira, Maj, A., Matea, I., Mihai, C., Möller, O., Myalski, S., Negoita, F., Pantelica, D., Perrot, L., Pissula, T., Rotaru, F., Rother, W., Scarpaci, J.A., Stefan, I., Stodel, C., Thomas, J.C., Ujic, P., Verney, D., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-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
21.10.Tg, 23.20.Lv, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; We have measured the lifetime of the $2^+_1$ state in $^{74}$Zn by the recoil distance Doppler-shift method at GANIL. It resulted to be of 27.6(43) ps and is consistent with previously measured values of transition rates from Coulomb excitation measurements.

Published
2010

19. g-factor measurements at RISING: The cases of 127Sn and 128Sn

Author

Atanasova, L., Balabanski, D. L., Chamoli, S. K., Hass, M., Simpson, G., Bazzacco, D., Becker, F., Bednarczyk, P., Benzoni, G., Blasi, N., Blazhev, A., Bracco, A., Brandau, C., Caceres, L., Camera, F., Crespi, F. C. L., Detistov, P., Doornenbal, P., Fahlander, C., Farnea, E., Georgiev, G., Gerl, J., Gladnishki, K. A., Gorska, M., Grebosz, J., Hoischen, R., Ilie, G., Ionescu-Bujor, M., Iordachescu, A., Jungclaus, A., Lo Bianco, G., Kmiecik, M., Kojouharov, I., Kurz, N., Lakshmi, S., Lozeva, R., Maj, A., Montanari, D., Neyens, G., Pfutzner, M., Pietri, S., Podolyak, Z., Prokopowicz, W., Rudolph, D., Rusev, G., Saito, T. R., Saltarelli, A., Schaffner, H., Schwengner, R., Tashenov, S., Valiente-Dobon, J. J., Vermeulen, N., Walker, J., Werner-Malento, E., Wieland, O., Wollersheim, H. J., Grawe, H., Hjorth-Jensen, M., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and RISING

Subjects
nuclear spectroscopy, time-differential perturbed angular distribution, shell model, g-factors, Nuclear structure, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

We report g-factor measurements for the 19/2+ T1/2 = 4.5(3) µs isomer in 127 Sn and the 10+ T1/2 = 2.69(23) µs isomer in 128 Sn. The experiment was carried out on isomers which were produced and spin-aligned in relativistic heavy-ion fragmentation at GSI and were selected and separated by the GSI fragment separator (FRS). The gamma-rays of the isomer decay were detected by the RISING array. The method of time-differential perturbed angular distribution was utilized. The measured g factors, g(19/2+ ;127 Sn) = -0.17(2) and g(10+ ;128 Sn) = -0.20(4), are compared with shell model calculations. The results demonstrate the feasibility of the method for similar measurements in exotic neutron-rich nuclei.

Published
2010

20. Isomeric states in neutron-deficient A ∼ 80–90 nuclei populated in the fragmentation of 107Ag

Author

Garnsworthy, A.B., Regan, P.H., Piétri, S., Sun, Y., Xu, F.R., Rudolph, D., Gorska, M., Caceres, L., Podolyak, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grebosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopwicz, W., Saito, T., Schaffner, H., Tachenov, S., Werner-Malento, E., Wollersheim, H.J., Benzoni, G., Blank, Bertram, Brandau, C., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombradi, Z., Estevez, E., Gelletly, W., Ilie, G., Jolie, J., Jones, G.A., Jungclaus, A., Kmiecik, M., Kondev, F.G., Kurtukian Nieto, T., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Pfutzner, M., Schwertel, S., Shizuma, T., Walker, Pm., Wieland, O., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and 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)

Subjects
Nuclear Theory, 29.30.Kv, 23.20.Lv, 23.35.+g, 27.50.+e, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The relativistic projectile fragmentation of a 750 MeV per nucleon beam of 107Agwas used to populate isomeric states in neutron-deficient nuclei around A = 80–90. Reaction products were separated and unambiguously identified using the GSI FRagment Separator (FRS) and its ancillary detectors. At the final focal plane, the fragments were slowed from relativistic energies by means of an aluminium degrader and implanted in a passive stopper in the center of the high-efficiency, high-granularity Stopped Rare Isotope Spectroscopic INvestigation at GSI (RISING) germanium array. This allowed the identification of excited states in the N = Z nuclei 86 43Tc and, for the first time, 82 41Nb. Isomeric states have also been identified for the first time in 87,88Tc, and a previously unreported isomer was observed in 84Nb. Experimental results are presented along with a discussion on the structure of these nuclei based on interpretations provided by several theoretical models.

Published
2009

21. Measurements of high-energy g-rayswithLaBr3 : Ce detectors

Author

Ciemała, M., Balabanski, D., Csatlós, M., Daugas, J.M., Georgiev, G., Gulyás, J., Kmiecik, M., Krasznahorkay, A., Lalkovski, S., Lefebvre-Schuhl, A., Lozeva, Radomira, Maj, A., Vitez, A., Niewodniczanski Institute of Nuclear Physics, Polska Akademia Nauk = Polish Academy of Sciences (PAN), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institute for Nuclear Research [Budapest] (ATOMKI), Hungarian Academy of Sciences (MTA), Faculty of Physics, University of Sofia, and Софийски университет = Sofia University

Subjects
[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Astrophysics::High Energy Astrophysical Phenomena, Computer Science::Computer Vision and Pattern Recognition, Gamma-raydetection Scintillation detectors LaBr3 : Ce crysta, Nuclear Experiment, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

The full-energy peak efficiency calibration and the energy resolution measurements of the image LaBr3 γ-ray detector are presented for γ-ray energies in the 700 keV–17.6 MeV range. Measurements were done using a combination of proton-capture nuclear reactions on image, image, image, image and image for high-energy γ-rays, and radioactive sources such as image and image for the lowest energies. At high energies, two γ-rays in a cascade from proton resonance capture were employed using Al, Na2WO4, K2SO4 and LiBO2 targets. The obtained results were compared to the simulations performed using a GEANT4 code.

Published
2009

22. Rotation and shape changes in 151Tb and 196Pb: Probes of nuclear structure and tunneling process in warm nuclei. II. Microscopic Monte Carlo simulation

Author

Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Camera, F., Corsi, A., C. L. Crespi, F., Mason, P., Million, B., Montanari, D., Pignanelli, M., Vigezzi, E., Wieland, O., Matsuo, M., R. Shimizu, Y., Curien, D., Duchêne, G., Robin, J., Bednarczyk, P., Castoldi, M., Herskind, B., Kmiecik, M., Maj, A., Meczynski, W., Styczen, J., Zieblinski, M., Zuber, K., Zucchiatti, A., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (INFN, Sezione di Genova), Istituto Nazionale di Fisica Nucleare (INFN), and National Institute for Nuclear Physics (INFN)

Subjects
21.10.Re, 23.20.Lv, 25.70.Gh, 27.70.+q, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

A Monte Carlo simulation of the $\gamma$ decay of superdeformed nuclei has been developed. It is based on microscopic calculations for the energy levels, E2 decay probabilities, collective mass parameters, and potential energy barriers. The use of microscopically calculated quantities largely reduces the parameters of the simulation, allowing one to focus on the basic ingredients of the physical processes. Calculations are performed for the warm rotating superdeformed nuclei 151Tb and 196Pb, for which high statistics Euroball IV data are available. The dependence on the simulation parameters is investigated, together with the basic features of the microscopic calculations

Published
2009

23. Rotation and shape changes in 151Tb and 196Pb: Probes of nuclear structure and tunneling process in warm nuclei. I. Experimental analysis

Author

Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Camera, F., Corsi, A., C. L. Crespi, F., Mason, P., Million, B., Montanari, D., Pignanelli, M., Vigezzi, E., Wieland, O., Matsuo, M., R. Shimizu, Y., Curien, D., Duchêne, G., Robin, J., Bednarczyk, P., Castoldi, M., Herskind, B., Kmiecik, M., Maj, A., Meczynski, W., Styczen, J., Zieblinski, M., Zuber, K., Zucchiatti, A., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (INFN, Sezione di Genova), Istituto Nazionale di Fisica Nucleare (INFN), and National Institute for Nuclear Physics (INFN)

Subjects
21.10.Re, 23.20.Lv, 25.70.Gh, 27.70.+q, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

The $\gamma$ decay associated with the warm rotation of the superdeformed nuclei 151Tb and 196Pb has been measured with the Euroball IV array. Several experimental quantities are presented, putting strong constraints on the decay dynamics in the superdeformed well. The data are successfully reproduced using a Monte Carlo simulation of the $\gamma$ decay based on microscopically calculated energy levels, E2 decay probabilities, collective mass parameters, and potential energy barriers between the wells associated with normal and super deformation. This allows one to test the basic ingredients of the physical process, such as the strength of the two-body residual interaction and the potential barriers as a function of spin and excitation energy. We also show that the data probe the E1 strength function, indicating an enhancement around 1–2 MeV $\gamma$ rays, which might be related to octupole vibrations

Published
2009

24. PARIS: a novel gamma calorimeter

Author

Maj, A., Azaiez, F., Balabanski, D., Bednarczyk, P., Chakrabarty, D., Ciemala, M., Sandrine Courtin, Dombradi, Z., Dorvaux, O., Dudek, J., Harissopulos, S., Jenkins, D., Kicinska-Habior, M., Kmiecik, M., Kumar, S., Mazumdar, I., Napiokowski, P., Pouthas, J., Roberts, O., Scarpaci, J. A., Schmitt, C., Stezowski, O., Wieleczko, J. P., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-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 Louis Pasteur - Strasbourg I-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), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Lion, Michel

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2008

25. Neutron–proton pairing competition in N = Z nuclei: Metastable state decays in the proton dripline nuclei NB-82(41) and Tc-86(43)

Author

Garnsworthy, AB, Regan, PH, Caceres, L, Pietri, S, Sun, Y, Rudolph, D, Gorska, M, Podolyak, Z, Steer, SJ, Hoischen, R, Heinz, A, Becker, F, Bednarczyk, P, Doornenbal, P, Geissel, H, Gerl, J, Grawe, H, Grebosz, J, Kelic, A, Kojouharov, I, Kurz, N, Montes, F, Prokopowicz, W, Saito, T, Schaffner, H, Tachenov, S, Werner-Malento, E, Wollersheim, HJ, Benzoni, G, Blank, BB, Brandau, C, Bruce, AM, Camera, F, Catford, WN, Cullen, IJ, Dombradi, Z, Estevez, E, Gelletly, W, Ilie, G, Jolie, J, Jones, GA, Jungclaus, A, Kmiecik, M, Kondev, FG, Kurtukian-Nieto, T, Lalkovski, S, Liu, Z, Maj, A, Myalski, S, Pfutzner, M, Schwertel, S, Shizuma, T, Simons, AJ, Walker, PM, Wielandi, O, Xu, FR, 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), Universidad de Santiago de Compostela, and Universidad de Santiago de Compostela [Spain] (USC)

Subjects
Nuclear Theory, 29.30.Kv, 23.20.Lv, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The low-lying structures of the self-conjugate (N = Z) nuclei Nb-82(41)41 andTc-86(43)43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a Ag-107 beam. These represent the heaviest odd–odd N = Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N = Z line between the doubly-magic systems Ni-56(28) and Sn-100(50) and support a preference for T = 1 states in Tz = 0 odd–odd nuclei at low excitation energies associated with a T = 1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in Nb-82 may be interpreted as an isospin-changing K isomer.

Published
2008

26. Probing the Order-to-Chaos Region in Superdeformed $^{151}$Tb and $^{196}$Pb Nuclei with Continuum $\gamma$ Transitions

Author

Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Camera, F., Corsi, A., Crespi, F. C. L., Mason, P., Million, B., Montanari, D., Pignanelli, M., Vigezzi, E., Wieland, O., Matsuo, M., Shimizu, Y. R., Bednarczyk, P., Castoldi, M., Curien, D., Duchene, G., Herskind, B., Kmiecik, M., Maj, A., Meczynski, W., Robin, J., Styczen, J., Zieblinski, M., Zuber, K., Zucchiatti, A., Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Laboratori Nazionali di Legnaro (LNL), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (INFN, Sezione di Genova), Istituto Nazionale di Fisica Nucleare [Milano] (INFN), and National Institute for Nuclear Physics (INFN)

Subjects
Nuclear Theory, 21.10.Re, 23.20.Lv, 27.70.+q, 27.80.+w, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The $\gamma$ decay associated with the warm rotation of the superdeformed nuclei 151Tb and 196Pb has been measured with the EUROBALL IV array. Several independent quantities provide a stringent test of the population and decay dynamics in the superdeformed well. A Monte Carlo simulation of the $\gamma$ decay based on microscopic calculations gives remarkable agreement with the data only assuming a large enhancement of the B(E1) strength for 1–2 MeV $\gamma$ rays, which may be related to the evidence for octupole vibrations in both mass regions.

Published
2008

27. New sub-mus isomers in 125,127,129Sn and isomer systematics of 124-130Sn

Author

Lozeva, Radomira, Simpson, G.S., Grawe, H., Neyens, G., Atanasova, L.A., L. Balabanski, D., Bazzacco, D., Becker, F., Bednarczyk, P., Benzoni, G., Blasi, N., Blazhev, A., Bracco, A., Brandau, C., Caceres, L., Camera, F., K. Chamoli, S., C. L. Crespi, F., Daugas, J.-M., Detistov, P., De Rydt, M., Doornenbal, P., Fahlander, C., Farnea, E., Georgiev, G., Gerl, J., A. Gladnishki, K., Gorska, M., Grebosz, J., Hass, M., Hoischen, R., Ilie, G., Ionescu-Bujor, M., Iordachescu, A., Jolie, J., Jungclaus, A., Kmiecik, M., Kojouharov, I., Kurz, N., P. Lakshmi, S., Lo Bianco, G., Mallion, S., Maj, A., Montanari, D., Perru, O., Pfutzner, M., Piétri, S., Pinston, J.A., Podolyak, Zs., Prokopowicz, W., Rudolph, D., Rusev, G., R. Saitoh, T., Saltarelli, A., Schaffner, H., Schwengner, R., Tashenov, S., Turzo, K., Valiente-Dobon, J.J., Vermeulen, N., Walker, J., Werner-Malento, E., Wieland, O., Wollersheim, H.-J., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-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 de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Département de Physique Théorique et Appliquée (DPTA), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and ILL

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 21.10.Tg, 21.60.Cs, 23.20.Lv, 27.60.+j
Abstract

Newsub-μs isomers have been observed in the neutron-rich Sn isotopes. 125,127,129Sn nuclei have been produced in a relativistic fission reaction of 238U on a 9Be target at 750 A·MeV and by the fragmentation of 136Xe at 600 A·MeV populating high-spin yrast states. In addition to the already known μs isomers, three new ones with sub-μs half-lives have been observed. These yrast isomers are the high-spin members of the ν(d−1 3/2h−2 11/2) and νh−n 11/2, seniority v = 3 multiplets leading to isomeric (23/2+) and (27/2−) states, respectively. Added to the already known 19/2+μs isomers in this region the current work completes the systematic information of neutron-hole excitations toward the filling of the last h11/2 orbital at N = 82. The results are discussed in the framework of state-of-the-art shell-model calculations using realistic interactions.

Published
2008

28. Observation of isomeric decays in the $r$-Process waiting-point nucleus $^{130}Cd_{82}$

Author

Jungclaus, A., Caceres, L., Gorska, M., Pfützner, M., Piétri, S., Werner-Malento, E., Grawe, H., Langanke, K., Martínez-Pinedo, G., Nowacki, F., Poves, A., Cuenca-García, J.J., Rudolph, D., Podolyak, Z., H. Regan, P., Detistov, P., Lalkovski, S., Modamio, V., Walker, J., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grebosz, J., Kojouharov, I., Kurz, N., Prokopowicz, W., Schaffner, H., J. Wollersheim, H., Andgren, K., Benlliure, J., Benzoni, G., M. Bruce, A., Casarejos, E., Cederwall, B., C. L. Crespi, F., Hadinia, B., Hellström, M., Hoischen, R., Ilie, G., Jolie, J., Khaplanov, A., Kmiecik, M., Kumar, R., Maj, A., Mandal, S., Montes, F., Myalski, S., Simpson, G.S., J. Steer, S., Tashenov, S., Wieland, O., Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)

Subjects
21.60.Cs, 23.20.Lv, 26.30.+k, 27.60.+j, Nuclear Theory, Physics::Atomic and Molecular Clusters, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The gamma decay of excited states in the waiting-point nucleus (130)Cd(82) has been observed for the first time. An 8(+) two-quasiparticle isomer has been populated both in the fragmentation of a (136)Xe beam as well as in projectile fission of 238U, making (130)Cd the most neutron-rich N = 82 isotone for which information about excited states is available. The results, interpreted using state-of-the-art nuclear shell-model calculations, show no evidence of an N = 82 shell quenching at Z = 48. They allow us to follow nuclear isomerism throughout a full major neutron shell from (98)Cd(50) to (130)Cd(82) and reveal, in comparison with (76)Ni(48) one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.

Published
2007

29. Effective GDR Width of $^{132}$Ce at High Spins and Temperatures from the LSD Model

Author

Mazurek, K., Kmiecik, M., Maj, A., Dudek, J., Schunck, N., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Forrler, Béatrice

Subjects
[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, 21.60.--n, Nuclear Experiment
Abstract

International audience; The Lublin--Strasbourg Drop (LSD) model, which reproduces quite satisfactorily the nuclear fission barriers, has been used as a basis for the thermal shape fluctuation method in order to compute effective GDR shapes of hot nuclei in particular at the regime of Jacobi shape transitions. In particular, the effective GDR width of $^{132}$Ce evolution as a function of angular momentum and temperature was calculated and compared to the existing experimental results. The need of including the effect of compound nucleus lifetime for temperatures higher than 2 MeV is discussed.

Published
2006

30. Damping mechanisms and order-to-chaos transition in the warm rotating $^{163}$Er nucleus

Author

Leoni, S., Benzoni, G., Bracco, A., Blasi, N., Camera, F., Grassi, C., Mason, P., Million, B., Paleni, A., Pignanelli, M., Vigezzi, E., Wieland, O., Matsuo, M., Døssing, T., Herskind, B., B. Hagemann, G., Wilson, J., Maj, A., Kmiecik, M., Lo Bianco, G., M. Petrache, C., Castoldi, M., Zucchiatti, A., De Angelis, G., R. Napoli, D., Bednarczyk, P., Curien, D., Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
nuclear spin, yrast states, nuclear shell model, nuclear energy level transitions, 21.10.Re, 21.60.Ka, 23.20.Lv, 27.70.+q, statistical models (nuclear), nuclei with mass number 150 to 189, gamma-ray spectra, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear cranking model, nuclear rotational states
Abstract

The $\gamma$ decay in the quasicontinuum is used to study the order-to-chaos transition in the thermally excited $^{163}$Er nucleus. The experimental analysis is performed on high-statistics EUROBALL data, focusing on the spin region I$\approx (20–40) \hbar$, and internal excitation energy up of $\approx$ 2.5 MeV. The results are compared to cranked shell model calculations for this nucleus, taking into account the dependence on the K quantum number. Two main topics are investigated. First, the validity of the selection rules associated with the K quantum number are studied as a function of the internal energy U above yrast. K-selection rules are found to be obeyed in the decay along discrete unresolved rotational bands up to U $\approx$ 1.2 MeV, whereas in the interval U $\approx$ 1.2–2.5 MeV, where the order-to-chaos transition is expected to take place, selection rules are found to be only partially valid. Second, the line-shape analysis of $\gamma-\gamma$ coincidence spectra provides a direct experimental measurement of the rotational and compound damping widths ($\Gamma_{rot}$ and $\Gamma\mu$), yielding values of 200 and 20 keV, respectively, in good agreement with theory.

Published
2005

31. Study of deformation effects in the charged particle emission from $^{46}$Ti

Author

Brekiesz, M., Papka, P., Maj, A., Kmiecik, M., Beck, C., Bednarczyk, P., Grebosz, J., Haas, F., Meczynski, W., Rauch, V., Rousseau, M., Zafra, A. Sanchez i, Styczen, J., Thummerer, S., Zieblinski, M., Zuber, K., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
25.70.Gh, 25.70.Jj, 25.70.mn, 24.60.Dr, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The 46Ti compound nucleus, as populated by the fusion-evaporation reaction 27Al + 19F at the bombarding energy of 144 MeV, has been investigated by charged particle spectroscopy using the multidetector array ICARE at the VIVITRON tandem facility of the IReS (Strasbourg). The light charged particles have been measured in coincidence with evaporation residues. The CACARIZO code, a Monte Carlo implementation of the statistical-model code CASCADE, has been used to calculate the spectral shapes of evaporated alpha-particles which are compared with the experimental spectra. This comparison indicates the possible signature of large deformations of the compound nucleus., Comment: 6 pages, 4 figures, Proceedings od the Zakopane 20004 Symposium, to be published in Acta Phys. Pol. B36 (2005)

Published
2004

32. Hyperdeformed shapes and Jacobi Transitions in $^{126}$Ba

Author

Herskind, B., Hagemann, G. B., Sletten, G., Th. Dossing, Ronn Hansen, C., Odegard, S., Huebel, H., Bringel, P., Buerger, A., Neusser, A., Singh, A. K., Al-Khatib, A., Patel, S. B., Bracco, A., Leoni, S., Camera, F., Benzoni, G., Mason, P., Paleni, A., Million, B., Wieland, O., Bednarczyk, P., Azaiez, F., Byrski, T., Dominique Curien, Dakov, O., Duchene, G., Khalfallah, F., Gall, B. J. P., Piqueras, I., Robin, J., Dudek, J., Rowley, N., Redon, N., Hannachi, F., Scheurer, J. N., Wilson, J. N., Lopez-Martens, A., Korichi, A., Hauschild, K., Roccaz, J., Siem, S., Fallon, P., Y Lee, L., Goergen, A., Nyako, B. M., Algora, A., Zs. Dombradi, Gai, J., Kalinka, G., Sohler, D., Molnar, J., Timar, J., Zolnai, L., Juhasz, K., Maj, A., Kmiecik, M., Brekiesz, M., Styczen, J., Zuber, K., Lisle, J. C., Cederwall, B., Langergren, K., Evans, A. O., Rainovski, G., Angelis, G., La Rana, G., Moro, R., Gast, W., Lieder, R. M., Podsvirova, E., Jaeger, H., Petrache, C. M., Petrache, D., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), EUROBALL, Heyd, Yvette, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), B., Herskind, G. B., Hagemann, G., Sletten, Døssing, T. h., C., Rønn Hansen, N., Schunck, S., Ødegard, H., Hübel, P., Bringel, A., Bürger, A., Neusser, A. K. Singh A., Al Khatib, S. B., Patel, A., Bracco, S., Leoni, F., Camera, G., Benzoni, P., Mason, A., Paleni, B., Million, O., Wieland, P., Bednarczyk, F., Azaiev, Byrski, T. h., D., Curien, O., Dakov, G., Duchene, F., Khalfallah, B., Gall, L., Piqera, J., Robin, J., Dudek, N., Rowley, B. M., Nyakø, A., Algora, Z., Dombradi, J., Gal, G., Kalinka, D., Sohler, J., Molnár, J., Timár, L., Zolnai, K., Juhász, N., Redon, F., Hannachi, J. N., Scheurer, J. N., Wilson, A., Lopez Marten, A., Korichi, K., Hauschild, J., Roccaz, S., Siem, P., Fallon, I. Y., Lee, A., Görgen, A., Maj, M., Kmiecik, M., Brekiesz, J., Styczen, K., Zuber, J. C., Lisle, B., Cederwall, K., Lagergren, A. O., Evan, G., Rainovski, G., De Angeli, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, W., Gast, R. M., Lieder, E., Podsvirova, H., Jäger, C. M., Petrache, and D. P. e. t. r. a. c. h., E.

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

Matière Nucléaire

Published
2003

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