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203 results on '"Zieblinski, M."'

1. Characterization of a novel proton-CT scanner based on Silicon and LaBr$_3$(Ce) detectors

Author

Nácher, E., Briz, J. A., Nerio, A. N., Perea, A., Távora, V. G., Tengblad, O., Ciemala, M., Cieplicka-Orynczak, N., Maj, A., Mazurek, K., Olko, P., Zieblinski, M., and Borge, M. J. G.

Subjects
Physics - Medical Physics, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

Treatment planning systems at proton-therapy centres generally use X-ray computed tomography (CT) as primary imaging technique to infer the proton treatment doses to tumour and healthy tissues. However, proton stopping powers in the body, as derived from X-ray images, suffer from important proton-range uncertainties. In order to reduce this uncertainty in range, one could use proton-CT images instead. The main goal of this work is to test the capabilities of a newly-developed proton-CT scanner, based on the use of a set of tracking detectors and a high energy resolution scintillator for the residual energy of the protons. Different custom-made phantoms were positioned at the field of view of the scanner and were irradiated with protons at the CCB proton-therapy center in Krakow. We measured with the phantoms at different angles and produced sinograms that were used to obtain reconstructed images by Filtered Back-Projection (FBP). The obtained images were used to determine the capabilities of our scanner in terms of spatial resolution and proton Relative Stopping Power mapping and validate its use as proton-CT scanner. The results show that the scanner can produce medium-high quality images, with spatial resolution better than 2 mm in radiography, below 3 mm in tomography and resolving power in the RSP comparable to other state of the art pCT cameras.

Published
2023

3. Proton radiographs using position-sensitive silicon detectors and high-resolution scintillators

Author

Briz, J. A., Nerio, A. N., Ballesteros, C., Borge, M. J. G., Martínez, P., Perea, A., Távora, V. G., Tengblad, O., Ciemala, M., Maj, A., Olko, P., Parol, W., Pedracka, A., Sowicki, B., Zieblinski, M., and Nácher, E.

Subjects
Physics - Medical Physics, Physics - Applied Physics, Physics - Instrumentation and Detectors
Abstract

Proton therapy is a cancer treatment technique currently in growth worldwide. It offers advantages with respect to conventional X-ray and $\gamma$-ray radiotherapy, in particular, a better control of the dose deposition allowing to reach a higher conformity in the treatments. Therefore, it causes less damage to the surrounding healthy tissue and less secondary effects. However, in order to take full advantage of its potential, improvements in treatment planning and dose verification are required. A new prototype of proton Computed Tomography scanner is proposed to design more accurate and precise treatment plans for proton therapy. Here, results obtained from an experiment performed using a 100-MeV proton beam at the CCB facility in Krakow (Poland) are presented. Proton radiographs of PMMA samples of 50-mm thickness with spatial patterns in aluminum were taken. Their properties were studied, including reproduction of the dimensions, spatial resolution and sensitivity to different materials. They demonstrate the capabilities of the system to produce images with protons. Structures of up to 2 mm are nicely resolved and the sensitivity of the system was enough to distinguish thicknesses of 10 mm of aluminum or PMMA. This constitutes a first step to validate the device as a proton radiography scanner previous to the future tests as a proton CT scanner., Comment: 7 pages, 11 figures, submitted to IEEE TNS ANIMMA 2021 Conference Proceedings

Published
2021
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4. Complete set of bound negative-parity states in the neutron-rich 18N nucleus

Author

Ziliani, S., Ciemała, 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., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, Ł. 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., Müller-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., and Zielinska, M.

Subjects
Nuclear Experiment
Abstract

High-resolution gamma-ray spectroscopy of 18N is performed with the Advanced GAmma Tracking Array AGATA, following deep-inelastic processes induced by an 18O beam on a 181Ta target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in 18N 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 0^-_1 and 1^-_2 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 16N and 18N, for the first time. Understanding the 18N structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021
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5. Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions

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., 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. -H., 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., and Zielinska, M.

Subjects
Nuclear Experiment
Abstract

A novel Monte Carlo technique has been developed to determine lifetimes of excited states in the tens-to-hundreds femtoseconds range. The method is applied to low-energy heavy-ion binary reactions populating nuclei with complex velocity distributions. Its relevance is demonstrated in connection with the $^{18}$O(7.0 MeV/u) + $^{181}$Ta experiment, performed at GANIL with the AGATA+VAMOS+PARIS setup, to study neutron-rich O, C, N, ... nuclei. Excited states in $^{17}$O and $^{19}$O, with known lifetimes, are used to validate the method over the $\sim$20-400 fs lifetime-sensitivity range. Emphasis is given to the unprecedented position resolution provided by $\gamma$-tracking arrays, which turns out to be essential for reaching the required accuracy in Doppler-shift correction, at the basis of the detailed analysis of $\gamma$-ray lineshape and resulting state lifetime determination. The technique is anticipated to be an important tool for lifetime investigations in exotic neutron-rich nuclei, produced with intense ISOL-type beams.

Published
2020
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6. Testing ab initio nuclear structure in neutron-rich nuclei: lifetime measurements of second 2+ states in 16C and 20O

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., 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, 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., and Simonis, J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

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

Author

Valdré, 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., Mȩczyński, W., Million, B., Montanari, D., Myalski, S., Nicolini, R., Olmi, A., Pasquali, G., Prete, G., Roberts, O. J., Styczeń, J., Szpak, B., Wasilewska, B., Wieland, O., Wieleczko, J. P., and Ziȩbliński, M.

Subjects
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
2015
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8. Energy response and identification efficiency of CsI(Tl) crystals irradiated with energetic protons

Author

Frosin, C., Barlini, S., Poggi, G., Casini, G., Bini, M., Stefanini, A.A., Valdré, S., Gruyer, D., Ciemała, M., Maj, A., Ziebliński, M., Sowicki, B., Mazurek, K., Cieplicka-Oryńczak, N., Matejska-Minda, M., Bonnet, E., Borderie, B., Bougault, R., Bruno, M., Buccola, A., Camaiani, A., Chibhi, A., Cinausero, M., Cicerchia, M., Dueñas, J., Fabris, D., Frankland, J., Gramegna, F., Henri, M., Kordyasz, A., Kozik, T., Le Neindre, N., Lombardo, I., Lopez, O., Mantovani, G., Marchi, T., Olmi, A., Ottanelli, P., Parlog, M., Piantelli, S., Pasquali, G., Upadhyahya, S., Verde, G., and Vient, E.

Published
2020
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9. Nuclear astrophysics with radioactive ions at FAIR

Author

Reifarth, R., Altstadt, S., Göbel, K., Heftrich, T., Heil, M., Koloczek, A., Langer, C., Plag, R., Pohl, M., Sonnabend, K., Weigand, M., Adachi, T., Aksouh, F., Al-Khalili, J., AlGarawi, M., AlGhamdi, S., Alkhazov, G., Alkhomashi, N., Alvarez-Pol, H., Alvarez-Rodriguez, R., Andreev, V., Andrei, B., Atar, L., Aumann, T., Avdeichikov, V., Bacri, C., Bagchi, S., Barbieri, C., Beceiro, S., Beck, C., Beinrucker, C., Belier, G., Bemmerer, D., Bendel, M., Benlliure, J., Benzoni, G., Berjillos, R., Bertini, D., Bertulani, C., Bishop, S., Blasi, N., Bloch, T., Blumenfeld, Y., Bonaccorso, A., Boretzky, K., Botvina, A., Boudard, A., Boutachkov, P., Boztosun, I., Bracco, A., Brambilla, S., Monago, J. Briz, Caamano, M., Caesar, C., Camera, F., Casarejos, E., Catford, W., Cederkall, J., Cederwall, B., Chartier, M., Chatillon, A., Cherciu, M., Chulkov, L., Coleman-Smith, P., Cortina-Gil, D., Crespi, F., Crespo, R., Cresswell, J., Csatlós, M., Déchery, F., Davids, B., Davinson, T., Derya, V., Detistov, P., Fernandez, P. Diaz, DiJulio, D., Dmitry, S., Doré, D., Duenas, J., Dupont, E., Egelhof, P., Egorova, I., Elekes, Z., Enders, J., Endres, J., Ershov, S., Ershova, O., Fernandez-Dominguez, B., Fetisov, A., Fiori, E., Fomichev, A., Fonseca, M., Fraile, L., Freer, M., Friese, J., Borge, M. G., Redondo, D. Galaviz, Gannon, S., Garg, U., Gasparic, I., Gasques, L., Gastineau, B., Geissel, H., Gernhäuser, R., Ghosh, T., Gilbert, M., Glorius, J., Golubev, P., Gorshkov, A., Gourishetty, A., Grigorenko, L., Gulyas, J., Haiduc, M., Hammache, F., Harakeh, M., Hass, M., Heine, M., Hennig, A., Henriques, A., Herzberg, R., Holl, M., Ignatov, A., Ignatyuk, A., Ilieva, S., Ivanov, M., Iwasa, N., Jakobsson, B., Johansson, H., Jonson, B., Joshi, P., Junghans, A., Jurado, B., Körner, G., Kalantar, N., Kanungo, R., Kelic-Heil, A., Kezzar, K., Khan, E., Khanzadeev, A., Kiselev, O., Kogimtzis, M., Körper, D., Kräckmann, S., Kröll, T., Krücken, R., Krasznahorkay, A., Kratz, J., Kresan, D., Krings, T., Krumbholz, A., Krupko, S., Kulessa, R., Kumar, S., Kurz, N., Kuzmin, E., Labiche, M., Langanke, K., Lazarus, I., Bleis, T. Le, Lederer, C., Lemasson, A., Lemmon, R., Liberati, V., Litvinov, Y., Löher, B., Herraiz, J. Lopez, Münzenberg, G., Machado, J., Maev, E., Mahata, K., Mancusi, D., Marganiec, J., Perez, M. Martinez, Marusov, V., Mengoni, D., Million, B., Morcelle, V., Moreno, O., Movsesyan, A., Nacher, E., Najafi, M., Nakamura, T., Naqvi, F., Nikolski, E., Nilsson, T., Nociforo, C., Nolan, P., Novatsky, B., Nyman, G., Ornelas, A., Palit, R., Pandit, S., Panin, V., Paradela, C., Parkar, V., Paschalis, S., Pawłowski, P., Perea, A., Pereira, J., Petrache, C., Petri, M., Pickstone, S., Pietralla, N., Pietri, S., Pivovarov, Y., Potlog, P., Prokofiev, A., Rastrepina, G., Rauscher, T., Ribeiro, G., Ricciardi, M., Richter, A., Rigollet, C., Riisager, K., Rios, A., Ritter, C., Frutos, T. Rodríguez, Vignote, J. Rodriguez, Röder, M., Romig, C., Rossi, D., Roussel-Chomaz, P., Rout, P., Roy, S., Söderström, P., Sarkar, M. Saha, Sakuta, S., Salsac, M., Sampson, J., Saez, J. Sanchez del Rio, Rosado, J. Sanchez, Sanjari, S., Sarriguren, P., Sauerwein, A., Savran, D., Scheidenberger, C., Scheit, H., Schmidt, S., Schmitt, C., Schnorrenberger, L., Schrock, P., Schwengner, R., Seddon, D., Sherrill, B., Shrivastava, A., Sidorchuk, S., Silva, J., Simon, H., Simpson, E., Singh, P., Slobodan, D., Sohler, D., Spieker, M., Stach, D., Stan, E., Stanoiu, M., Stepantsov, S., Stevenson, P., Strieder, F., Stuhl, L., Suda, T., Sümmerer, K., Streicher, B., Taieb, J., Takechi, M., Tanihata, I., Taylor, J., Tengblad, O., Ter-Akopian, G., Terashima, S., Teubig, P., Thies, R., Thoennessen, M., Thomas, T., Thornhill, J., Thungstrom, G., Timar, J., Togano, Y., Tomohiro, U., Tornyi, T., Tostevin, J., Townsley, C., Trautmann, W., Trivedi, T., Typel, S., Uberseder, E., Udias, J., Uesaka, T., Uvarov, L., Vajta, Z., Velho, P., Vikhrov, V., Volknandt, M., Volkov, V., von Neumann-Cosel, P., von Schmid, M., Wagner, A., Wamers, F., Weick, H., Wells, D., Westerberg, L., Wieland, O., Wiescher, M., Wimmer, C., Wimmer, K., Winfield, J. S., Winkel, M., Woods, P., Wyss, R., Yakorev, D., Yavor, M., Cardona, J. Zamora, Zartova, I., Zerguerras, T., Zgura, I., Zhdanov, A., Zhukov, M., Zieblinski, M., Zilges, A., and Zuber, K.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Nuclear Experiment
Abstract

The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-process beta-decay chains. These nuclei are attributed to the p and rp process. For all those processes, current research in nuclear astrophysics addresses the need for more precise reaction data involving radioactive isotopes. Depending on the particular reaction, direct or inverse kinematics, forward or time-reversed direction are investigated to determine or at least to constrain the desired reaction cross sections. The Facility for Antiproton and Ion Research (FAIR) will offer unique, unprecedented opportunities to investigate many of the important reactions. The high yield of radioactive isotopes, even far away from the valley of stability, allows the investigation of isotopes involved in processes as exotic as the r or rp processes., Comment: Invited Talk given at the Conference Nuclear Physice in Astrophysics VI (NPA6), Lisbon, Portugal, May 19-24 2013. To appear in the NPA6 Proceedings in Journal of Physics: Conference Series (JPCS)

Published
2013
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10. Measurement of light charged particles in the decay channels of medium-mass excited compound nuclei

Author

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

Subjects
Nuclear Experiment
Abstract

The 48Ti on 40Ca reactions have been studied at 300 and 600 MeV focusing on the fusion-evaporation (FE) and fusion-fission (FF) exit channels. Energy spectra and multiplicities of the emitted light charged particles have been compared to Monte Carlo simulations based on the statistical model. Indeed, in this mass region (A about 100) models predict that shape transitions can occur at high spin values and relatively scarce data exist in the literature about coincidence measurements between evaporation residues and light charged particles. Signals of shape transitions can be found in the variations of the lineshape of high energy gamma rays emitted from the de-excitation of GDR states gated on different region of angular momenta. For this purpose it is important to keep under control the FE and FF processes, to regulate the statistical model parameters and to control the onset of possible preequilibrium emissions from 300 to 600 MeV bombarding energy., Comment: 4 pages, 3 figures, Contribution to conference proceedings of the 25th International Nuclear Physics Conference (INPC 2013) Journal-ref: 25th International Nuclear Physics Conference (INPC 2013), Firenze : Italy (2013)

Published
2013
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11. AGATA - Advanced Gamma Tracking Array

Author

Akkoyun, S., Algora, A., Alikhani, B., Ameil, F., de Angelis, G., Arnold, L., Astier, A., Ataç, A., Aubert, Y., Aufranc, C., Austin, A., Aydin, S., Azaiez, F., Badoer, S., Balabanski, D. L., Barrientos, D., Baulieu, G., Baumann, R., Bazzacco, D., Beck, F. A., Beck, T., Bednarczyk, P., Bellato, M., Bentley, M. A., Benzoni, G., Berthier, R., Berti, L., Beunard, R., Bianco, G. Lo, Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Blanc, F. Le, Blasco, J. M., Blasi, N., Bloor, D., Boiano, C., Borsato, M., Bortolato, D., Boston, A. J., Boston, H. C., Bourgault, P., Boutachkov, P., Bouty, A., Bracco, A., Brambilla, S., Brawn, I. P., Brondi, A., Broussard, S., Bruyneel, B., Bucurescu, D., Burrows, I., Bürger, A., Cabaret, S., Cahan, B., Calore, E., Camera, F., Capsoni, A., Carrió, F., Casati, G., Castoldi, M., Cederwall, B., Cercus, J. -L., Chambert, V., Chambit, M. El, Chapman, R., Charles, L., Chavas, J., Clément, E., Cocconi, P., Coelli, S., Coleman-Smith, P. J., Colombo, A., Colosimo, S., Commeaux, C., Conventi, D., Cooper, R. J., Corsi, A., Cortesi, A., Costa, L., Crespi, F. C. L., Cresswell, J. R., Cullen, D. M., Curien, D., Czermak, A., Delbourg, D., Depalo, R., Descombes, T., Désesquelles, P., Detistov, P., Diarra, C., Didierjean, F., Dimmock, M. R., Doan, Q. T., Domingo-Pardo, C., Doncel, M., Dorangeville, F., Dosme, N., Drouen, Y., Duchêne, G., Dulny, B., Eberth, J., Edelbruck, P., Egea, J., Engert, T., Erduran, M. N., Ertürk, S., Fanin, C., Fantinel, S., Farnea, E., Faul, T., Filliger, M., Filmer, F., Finck, Ch., de France, G., Gadea, A., Gast, W., Geraci, A., Gerl, J., Gernhäuser, R., Giannatiempo, A., Giaz, A., Gibelin, L., Givechev, A., Goel, N., González, V., Gottardo, A., Grave, X., Grȩbosz, J., Griffiths, R., Grint, A. N., Gros, P., Guevara, L., Gulmini, M., Görgen, A., Ha, H. T. M., Habermann, T., Harkness, L. J., Harroch, H., Hauschild, K., He, C., Hernández-Prieto, A., Hervieu, B., Hess, H., Hüyük, T., Ince, E., Isocrate, R., Jaworski, G., Johnson, A., Jolie, J., Jones, P., Jonson, B., Joshi, P., Judson, D. S., Jungclaus, A., Kaci, M., Karkour, N., Karolak, M., Kaşkaş, A., Kebbiri, M., Kempley, R. S., Khaplanov, A., Klupp, S., Kogimtzis, M., Kojouharov, I., Korichi, A., Korten, W., Kröll, Th., Krücken, R., Kurz, N., Ky, B. Y., Labiche, M., Lafay, X., Lavergne, L., Lazarus, I. H., Leboutelier, S., Lefebvre, F., Legay, E., Legeard, L., Lelli, F., Lenzi, S. M., Leoni, S., Lermitage, A., Lersch, D., Leske, J., Letts, S. C., Lhenoret, S., Lieder, R. M., Linget, D., Ljungvall, J., Lopez-Martens, A., Lotodé, A., Lunardi, S., Maj, A., van der Marel, J., Mariette, Y., Marginean, N., Marginean, R., Maron, G., Mather, A. R., Mȩczyński, W., Mendéz, V., Medina, P., Melon, B., Menegazzo, R., Mengoni, D., Merchan, E., Mihailescu, L., Michelagnoli, C., Mierzejewski, J., Milechina, L., Million, B., Mitev, K., Molini, P., Montanari, D., Moon, S., Morbiducci, F., Moro, R., Morrall, P. S., Möller, O., Nannini, A., Napoli, D. R., Nelson, L., Nespolo, M., Ngo, V. L., Nicoletto, M., Nicolini, R., Noa, Y. Le, Nolan, P. J., Norman, M., Nyberg, J., Obertelli, A., Olariu, A., Orlandi, R., Oxley, D. C., Özben, C., Ozille, M., Oziol, C., Pachoud, E., Palacz, M., Palin, J., Pancin, J., Parisel, C., Pariset, P., Pascovici, G., Peghin, R., Pellegri, L., Perego, A., Perrier, S., Petcu, M., Petkov, P., Petrache, C., Pierre, E., Pietralla, N., Pietri, S., Pignanelli, M., Piqueras, I., Podolyak, Z., Pouhalec, P. Le, Pouthas, J., Pugnére, D., Pucknell, V. F. E., Pullia, A., Quintana, B., Raine, R., Rainovski, G., Ramina, L., Rampazzo, G., La Rana, G., Rebeschini, M., Recchia, F., Redon, N., Reese, M., Reiter, P., Regan, P. H., Riboldi, S., Richer, M., Rigato, M., Rigby, S., Ripamonti, G., Robinson, A. P., Robin, J., Roccaz, J., Ropert, J. -A., Rossé, B., Alvarez, C. Rossi, Rosso, D., Rubio, B., Rudolph, D., Saillant, F., Şahin, E., Salomon, F., Salsac, M. -D., Salt, J., Salvato, G., Sampson, J., Sanchis, E., Santos, C., Schaffner, H., Schlarb, M., Scraggs, D. P., Seddon, D., Şenyiğit, M., Sigward, M. -H., Simpson, G., Simpson, J., Slee, M., Smith, J. F., Sona, P., Sowicki, B., Spolaore, P., Stahl, C., Stanios, T., Stefanova, E., Stézowski, O., Strachan, J., Suliman, G., Söderström, P. -A., Tain, J. L., Tanguy, S., Tashenov, S., Theisen, Ch., Thornhill, J., Tomasi, F., Toniolo, N., Touzery, R., Travers, B., Triossi, A., Tripon, M., Tun-Lanoë, K. M. M., Turcato, M., Unsworth, C., Ur, C. A., Valiente-Dobon, J. J., Vandone, V., Vardaci, E., Venturelli, R., Veronese, F., Veyssiere, Ch., Viscione, E., Wadsworth, R., Walker, P. M., Warr, N., Weber, C., Weisshaar, D., Wells, D., Wieland, O., Wiens, A., Wittwer, G., Wollersheim, H. J., Zocca, F., Zamfir, N. V., Ziȩbliński, M., and Zucchiatti, A.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realization of gamma-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly-segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterization of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximize its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer., Comment: This version contains a correction of a typing error in the caption of Fig. 2. The DOI to the article published in Nucl. Instr. Meth A was also added

Published
2011
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12. Probing the order-to-chaos region in superdeformed 151Tb and 196Pb 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., and Zucchiatti, A.

Subjects
Nuclear Experiment
Abstract

The gamma-decay associated with the warm rotation of the superdeformed (SD) 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 SD 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 at low excitation energy, which may be related to the evidence for octupole vibrations in both mass regions.

Published
2008
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13. Strong Deformation Effects in Hot Rotating 46Ti

Author

Kmiecik, M., Maj, A., Brekiesz, M., Mazurek, K., Bednarczyk, P., Grebosz, J., Meczynski, W., Styczen, J., Zieblinski, M., Zuber, K., Papka, P., Beck, C., Curien, D., Haas, F., Rauch, V., Rousseau, M., Dudek, J., Schunck, N., Bracco, A., Camera, F., Benzoni, G., Wieland, O., Herskind, B., Farnea, E., and De Angelis, G.

Subjects
Nuclear Experiment
Abstract

Exotic-deformation effects in 46Ti nucleus were investigated by analysing the high-energy gamma-ray and the alpha-particle energy spectra. One of the experiments was performed using the charged-particle multi-detector array ICARE together with a large volume (4"x4") BGO detector. The study focused on simultaneous measurement of light charged particles and gamma-rays in coincidence with the evaporation residues. The experimental data show a signature of very large deformations of the compound nucleus in the Jacobi transition region at the highest spins. These results are compared to data from previous experiments performed with the HECTOR array coupled to the EUROBALL array, where it was found that the GDR strength function is highly fragmented, strongly indicating a presence of nuclei with very large deformation., Comment: 10 pages, 6 figures, Proceedings of the Zakopane Conference on Nuclear Physics, to be published in Acta Phys. Pol. B (2007)

Published
2006

14. GDR Feeding of the Highly-Deformed Band in 42Ca

Author

Kmiecik, M., Maj, A., Styczen, J., Bednarczyk, P., Brekiesz, M., Grebosz, J., Lach, M., Meczynski, W., Zieblinski, M., Zuber, K., Bracco, A., Camera, F., Benzoni, G., Million, B., Leoni, S., Wieland, O., Herskind, B., Curien, D., Dubray, N., Dudek, J., Schunck, N., and Mazurek, K.

Subjects
Nuclear Experiment
Abstract

The gamma-ray spectra from the decay of the GDR in the compound nucleus reaction 18O+28Si at bombarding energy of 105 MeV have been measured in an experiment using the EUROBALL IV and HECTOR arrays. The obtained experimental GDR strength function is highly fragmented, with a low energy (10 MeV) component, indicating a presence of a large deformation and Coriolis effects. In addition, the preferential feeding of the highly-deformed band in 42Ca by this GDR low energy component is observed., Comment: 6 pages, 2 figures, Proceedings of the Zakopane2004 Symposium, to be published in Acta Phys. Pol. B36 (2005)

Published
2004

15. Study of Deformation Effects in the Charged Particle Emission from 46Ti

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., and Zuber, K.

Subjects
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

16. Evidence for the Jacobi shape transition in hot 46Ti

Author

Maj, A., Kmiecik, M., Bracco, A., Camera, F., Bednarczyk, P., Herskind, B., Brambilla, S., Benzoni, G., Brekiesz, M., Curien, D., DeAngelis, G., Farnea, E., Grebosz, J., Kicinska-Habior, M., Leoni, S., Meczynski, W., Million, B., Napoli, D. R., Nyberg, J., Petrache, C. M., Styczen, J., Wieland, O., Zieblinski, M., Zuber, K., Dubray, N., Dudek, J., and Pomorski, K.

Subjects
Nuclear Experiment
Abstract

The gamma-rays from the decay of the GDR in 46Ti compound nucleus formed in the 18O+28Si reaction at bombarding energy 105 MeV have been measured in an experiment using a setup consisting of the combined EUROBALL IV, HECTOR and EUCLIDES arrays. A comparison of the extracted GDR lineshape data with the predictions of the thermal shape fluctuation model shows evidence for the Jacobi shape transition in hot 46Ti. In addition to the previously found broad structure in the GDR lineshape region at 18-27 MeV caused by large deformations, the presence of a low energy component (around 10 MeV), due to the Coriolis splitting in prolate well deformed shape, has been identified for the first time., Comment: 8 pages, 4 figures, proceedings of the COMEX1 conference, June 2003, Paris; to be published in Nucl. Phys. A

Published
2003
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17. Search for the Jacobi shape transition in light nuclei

Author

Maj, A., Kmiecik, M., Brekiesz, M., Grebosz, J., Meczynski, W., Styczen, J., Zieblinski, M., Zuber, K., Bracco, A., Camera, F., Benzoni, G., Million, B., Blasi, N., Brambilla, S., Leoni, S., Pignanelli, M., Wieland, O., Nyberg, J., Kicinska-Habior, M., Petrache, C. M., Dudek, J., and Pomorski, K.

Subjects
Nuclear Experiment
Abstract

The gamma-rays following the reaction 105 MeV 18O + 28Si have been measured using the EUROBALL IV, HECTOR and EUCLIDES arrays in order to investigate the predicted Jacobi shape transition. The high-energy gamma-ray spectrum from the GDR decay indicates a presence of large deformations in hot 46Ti nucleus, in agreement with new theoretical calculations based on the Rotating Liquid Drop model., Comment: NS2002 Conference. Legnaro, Sptember 2002; to be published in EPJA

Published
2003
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18. M4 resonnaces in light nuclei studied at CCB

Author

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

Abstract

info:eu-repo/semantics/published

Published
2023

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

Author

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

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

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

Author

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

Published
2022
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22. Proton Radiographs Using Position-Sensitive Silicon Detectors and High-Resolution Scintillators

Author

Comunidad de Madrid, European Commission, Agencia Estatal de Investigación (España), Briz, José Antonio, Nerio, A.N., Ballesteros, C., García Borge, María José, Martínez, P., Perea, Ángel, García Tavora, Vicente, Tengblad, Olof, Clemaia, M., Maj, A., Oiko, P., Parol, W., Pedracka, A., Sowicki, B., Zieblinski, M., Nácher, Enrique, Comunidad de Madrid, European Commission, Agencia Estatal de Investigación (España), Briz, José Antonio, Nerio, A.N., Ballesteros, C., García Borge, María José, Martínez, P., Perea, Ángel, García Tavora, Vicente, Tengblad, Olof, Clemaia, M., Maj, A., Oiko, P., Parol, W., Pedracka, A., Sowicki, B., Zieblinski, M., and Nácher, Enrique

Abstract

Proton therapy is a cancer treatment technique currently in growth since it offers advantages with respect to conventional X-ray and ¿ -ray radiotherapy. In particular, better control of the dose deposition allowing to reach higher conformity in the treatments causing less secondary effects. However, in order to take full advantage of its potential, improvements in treatment planning and dose verification are required. A new prototype of proton computed tomography scanner is proposed to design more accurate and precise treatment plans for proton therapy. Our prototype is formed by double-sided silicon strip detectors and scintillators of LaBr3(Ce) with high energy resolution and fast response. Here, the results obtained from an experiment performed using a 100-MeV proton beam are presented. Proton radiographs of polymethyl methacrylate (PMMA) samples of 50-mm thickness with spatial patterns in aluminum were taken. Their properties were studied, including reproduction of the dimensions, spatial resolution, and sensitivity to different materials. Structures of up to 2 mm are well resolved and the sensitivity of the system was enough to distinguish the thicknesses of 10 mm of aluminum or PMMA. The spatial resolution of the images was 0.3 line pairs per mm (MTF-10%). This constitutes the first step to validate the device as a proton radiography scanner.

Published
2022

23. Complete set of bound negative-parity states in the neutron-rich nucleus

Author

Ziliani S., Ciemala 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., 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 CH., Stanoiu M., Stefan I., Vardaci E., Wasilewska B., Wieland O., Zieblinski M., Zielinska M., Ziliani, S., Ciemala, 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., 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, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., and Zielinska, M.

Abstract

High-resolution -ray spectroscopy of is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an beam on a target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in 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 and 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 and , for the first time. Understanding the structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021

24. Proton radiographs using position-sensitive silicon detectors and high-resolution scintillators

Author

Briz, J.A., primary, Nerio, A.N., additional, Ballesteros, C., additional, Borge, M.J.G., additional, Martinez, P., additional, Perea, A., additional, Tavora, V.G., additional, Tengblad, O., additional, Ciemala, M., additional, Maj, A., additional, Olko, P., additional, Parol, W., additional, Pedracka, A., additional, Sowicki, B., additional, Zieblinski, M., additional, and Nacher, E., additional

Published
2022
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25. Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2+ state in C 16 and O 20

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., 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., 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, Z., Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Stezowski, O., Theisen, C., Valiente-Dobon, J. J., Holt, J. D., Menendez, J., Schwenk, A., Simonis, J., 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., 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., 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, Z., Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Stezowski, O., Theisen, C., Valiente-Dobon, J. J., Holt, J. D., Menendez, J., Schwenk, A., and Simonis, J.

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.

Published
2020

26. 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

27. Complete set of bound negative-parity states in the neutron-rich nucleus N-18

Author

Ziliani, S., Ciemala, 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., 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., Mueller-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., Ziebliska, M., Ziliani, S., Ciemala, 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., 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., Mueller-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., and Ziebliska, M.

Abstract

High-resolution. -ray spectroscopy of N-18 is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an O-18 beam on a Ta-181 target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in N-18 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 0(1)(-) and 1(2)(-) 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 N-16 and N-18, for the first time. Understanding the N-18 structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021

28. Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions

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., 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. -H., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Mueller-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., 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., 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. -H., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Mueller-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., and Zielinska, M.

Abstract

A novel Monte Carlo technique has been developed to determine lifetimes of excited states in the tens-to-hundreds femtoseconds range in products of low-energy heavy-ion binary reactions, with complex velocity distributions. The method is based on a detailed study of Doppler-broadened gamma-ray lineshapes. Its relevance is demonstrated in connection with the 18O(7.0MeV/u)+181Ta experiment, performed at GANIL with the AGATA+VAMOS+PARIS setup, to study neutron-rich O, C, N, ... nuclei. Excited states in O-17 and O-19, with known lifetimes, are used to validate the method over the similar to 20-400fs lifetime-sensitivity range. Emphasis is given to the unprecedented position resolution provided by gamma-tracking arrays, which turns out to be essential for reaching the required accuracy in Doppler-shift correction. The technique is anticipated to be an important tool for lifetime investigations in exotic neutron-rich nuclei, produced with intense ISOL-type beams.

Published
2021

29. Lifetime analysis of short-lived states in N-17

Author

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., Mueller-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., 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., Mueller-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., and Zielinska, M.

Abstract

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 N-17. The reliability of the technique is confirmed by measuring the lifetime of the 5515 keV 3/2(-) state, which is depopulated by two different gamma 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
2021

30. DETERMINATION OF LIFETIMES OF EXCITED STATES IN NEUTRON-RICH O-20 ISOTOPE FROM EXPERIMENT WITH THE AGATA plus PARIS plus VAMOS SETUP

Author

Ciemala, 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-Orynczak, N., Clement, E., Dorvaux, O., Erturk, S., De France, G., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Li, H., Matea, I, Mazurek, K., Michelagnoli, C., Millon, B., Mueller-Gatermann, C., Napiorkowski, P., Nanal, V, Matejska-Minda, M., Rejmund, M., Sowicki, B., Schmitt, Ch, Stanoiu, M., Stefan, I, Wasilewska, B., Zielinska, M., Zieblinski, M., Fornal, Bogdan -- 0000-0002-1142-8067, Ciemala, Michal -- 0000-0001-5328-720X, and [Ciemala, M. -- Fornal, B. -- Maj, A. -- Bednarczyk, P. -- Cieplicka-Orynczak, N. -- Grebosz, J. -- Iskra, L. W. -- Kmiecik, M. -- Mazurek, K. -- Sowicki, B. -- Wasilewska, B. -- Zieblinski, M.] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland -- [Ziliani, S. -- Crespi, F. -- Leoni, S. -- Bracco, A. -- Bottoni, S. -- Brambilla, S. -- Camera, F.] Univ Milan, Via Celoria 16, I-20133 Milan, Italy -- [Ziliani, S. -- Crespi, F. -- Leoni, S. -- Benzoni, G. -- Bracco, A. -- Boiano, C. -- Bottoni, S. -- Camera, F. -- Millon, B.] INFN, Sez Milano, Milan, Italy -- [Bast, M. -- Beckers, M. -- Braunroth, T. -- Goldkuhle, A. -- Mueller-Gatermann, C.] IKP Cologne, Cologne, Germany -- [Clement, E. -- De France, G. -- Jacquot, B. -- Kim, Y. -- Lemasson, A. -- Li, H. -- Rejmund, M.] CEA DSAM, GANIL, Caen 05, France -- [Clement, E. -- De France, G. -- Jacquot, B. -- Kim, Y. -- Lemasson, A. -- Li, H. -- Rejmund, M.] CNRS, IN2P3, Caen 05, France -- [Dorvaux, O. -- Schmitt, Ch] CNRS, IN2P3, IPHC UMR 7178, F-67037 Strasbourg, France -- [Erturk, S.] Nigde Univ, Nigde, Turkey -- [Harakeh, M. N.] KVI Ctr Adv Radiat Technol, Groningen, Netherlands -- [Karpov, A.] JINR, Dubna, Russia -- [Kicinska-Habior, M.] Warsaw Univ, Fac Phys, Warsaw, Poland -- [Matea, I -- Stefan, I] IPN Orsay Lab, Orsay, France -- [Michelagnoli, C.] ILL Grenoble, Grenoble, France -- [Napiorkowski, P. -- Matejska-Minda, M.] Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland -- [Nanal, V] Tata Inst Fundamental Res, Dept Nucl & Atom Phys, Mumbai 400005, Maharashtra, India -- [Stanoiu, M.] IFIN HH, Bucharest, Romania -- [Zielinska, M.] Ctr CEA Saclay, IRFU, CEA DRF, F-91191 Gif Sur Yvette, France

Abstract

Zakopane Conference on Nuclear Physics - Extremes of the Nuclear Landscape -- AUG 26-SEP 02, 2018 -- Zakopane, POLAND, WOS: 000463866500051, An experiment aiming at measuring lifetimes of the second 2(+) excited states in neutron-rich C and O isotopes was recently performed at the GANIL laboratory, in France. In these nuclei, recent ab initio calculations provide a detailed description of the nuclear excited states, predicting a strong sensitivity of the electromagnetic transition probabilities to the details of the nucleon-nucleon interactions, especially in connection with the role played by the three-body (NNN) forces. Thus, the measurement of 2(+) states lifetimes in this region will be a stringent test of the importance of including the NNN forces in describing the electromagnetic properties of selected nuclear states. This contribution reports on the status of the experimental analysis for the case of lifetimes in O-20., European Union's Horizon 2020 through ENSAR2 grant [654002]; National Science Centre, Poland (NCN) [2013/08/M/ST2/00257, 2014/14/M/ST2/00738, 2016/22/M/ST2/00269]; COPININ2P3 collaboration, We acknowledge the important technical contributions of J. Goupil and the GANIL accelerator staff. The authors acknowledge support from the European Union's Horizon 2020 through ENSAR2 grant agreement No. 654002, the National Science Centre, Poland (NCN) Contract No. 2013/08/M/ST2/00257, 2014/14/M/ST2/00738 and 2016/22/M/ST2/00269 and COPININ2P3 collaboration.

Published
2019

31. Probing isospin mixing with the giant dipole resonance in the Zn60 compound nucleus

Author

Gosta, G., primary, Mentana, A., additional, Camera, F., additional, Bracco, A., additional, Ceruti, S., additional, Benzoni, G., additional, Blasi, N., additional, Brambilla, S., additional, Capra, S., additional, Crespi, F. C. L., additional, Giaz, A., additional, Leoni, S., additional, Million, B., additional, Riboldi, S., additional, Porzio, C., additional, Ziliani, S., additional, Wieland, O., additional, Nannini, A., additional, Rocchini, M., additional, Marchini, N., additional, Ciemała, M., additional, Kmiecik, M., additional, Maj, A., additional, Wasilewska, B., additional, Zieblinski, M., additional, Filipescu, D., additional, Kaur, J., additional, Marginean, N., additional, Pascu, S., additional, Glodariu, T., additional, Ghita, D., additional, Zamfir, V., additional, Valiente-Dobón, J. J., additional, de Angelis, G., additional, Galtarossa, F., additional, Goasduff, A., additional, Bayram, T., additional, Gadea, A., additional, Montaner, A., additional, Zanon, I., additional, Brugnara, D., additional, Gozzelino, A., additional, Pasqualato, G., additional, Menegazzo, R., additional, Gottardo, A., additional, Jaworski, G., additional, Lenzi, S., additional, Napoli, D., additional, Testov, D., additional, Siciliano, M., additional, Marchi, T., additional, Mengoni, D., additional, Bazzacco, D., additional, Boso, A., additional, John, P. R., additional, Recchia, F., additional, Raabe, R., additional, Poleshchuk, O., additional, and Yang, J., additional

Published
2021
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32. 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

33. 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

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

Author

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

Abstract

info:eu-repo/semantics/published

Published
2020

36. Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2+ state in C16 and O20

Author

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

Published
2020
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38. Lifetime measurements of short-lived excited states, and shape changes in 69As and 66Ge 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, Meczynski, W, Michelagnoli, C, Palacz, M, Recchia, F, Sahin, Eda, Styczen, J, Szpak, B, Ur, C.A., Wadsworth, R, and Zieblinski, M

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

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 69 As and 66 Ge nuclei to examine the shape evolution in these neutron-deficient nuclei. Methods: Lifetimes of high-spin states in 69 As and 66 Ge 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 32 S ( 95 MeV ) + 0.8 mg / cm 2 40 Ca fusion-evaporation reaction. The strongest reaction channels 3p and α 2 p led to the 69 As and 66 Ge 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 69 As , the extracted lifetimes are τ = 72 ( − 32 , +45 ) fs for the 33 / 2 + state at 7897 keV and τ < 85 fs for the 37 / 2 + state at 9820 keV. For the 66 Ge case, the lifetime of the 11 − state at 7130 keV is τ = 122 ( ± 41 ) fs. Lifetimes in 69 As and 66 Ge reported in this paper have been measured for the first time in the present experiment. Conclusions: The results are discussed in the terms of deformation and shape evolution in 69 As and 66 Ge . The quadrupole moments deduced from the measured lifetimes were compared with the cranked Woods-Saxon-Strutinsky calculations by means of the total Routhian surface method. It turns out that Band 3 in 69 As shows an oblate-prolate shape transition, and above spin 33 / 2 + it corresponds to a prolate collective structure with β 2 ≈ 0.27 and γ ≈ 20 ∘ . In turn, in 66 Ge the negative-parity band built on the 7− state at 4205 keV corresponds to a triaxial shape with β 2 = 0.33 and γ = 31 ∘ . Analysis of the transitional quadrupole moments derived from the experimental and theoretical ones points to a significant change of deformation in the 69 As and 66 Ge nuclei with increasing rotational frequency.

Published
2019

39. Isospin mixing at finite temperature in 80Zr

Author

Ceruti Simone, Giaz A., Camera F., Avigo R., Benzoni G., Blasi N., Bracco A., Brambilla S., Coelli S., Corsi A., Crespi F., Leoni S., Million B., Morales-Lopez A.I., Pellegri L., Nicolini R., Riboldi S., Vandone V., Wieland O., Bortolato D., Fanin C., Gottardo A., Valiente-Dobon J.J., Bellato M., Bazzacco D., Mengoni D., Michelagnoli C., Montanari D., Recchia F., Farnea E., Ur C., Zieblinski M., Ciemala M., Kmiecik M., Maj A., Myalski S., and Styczen J.

Subjects
Physics, QC1-999
Abstract

Isospin mixing induced by the Coulomb interaction has been studied in the compound nucleus 80Zr at T~2 MeV produced in the fusion-evaporation reaction 40Ca+40Ca at Ebeam = 136 MeV. The isospin impurity was measured using the first step of the Giant Dipole Resonance γ decay. The preliminary value of the Coulomb spreading width has been extracted via statistical model analysis of the measured γ spectrum.

Published
2014
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40. Study of the γ decay of high-lying states in 208Pb via inelastic scattering of 17O ions

Author

Crespi F.C.L., Kmiecik M., Bracco A., Leoni S., Maj A., Benzoni G., Blasi N., Boiano C., Bottoni S., Brambilla S., Camera F., Ceruti S., Giaz A., Million B., Morales A.I., Nicolini R., Pellegri L., Riboldi S., 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., Angelis G. De, Farnea E., Gadea A., Görgen A., Gottardo A., Isocrate R., Lenzi S., Lunardi S., Mengoni D., Michelagnoli C., Molini P., Napoli D.R., Recchia F., Sahin E., Siebeck B., Siem S., Ur C., and Dobon J.J. Valiente

Subjects
Physics, QC1-999
Abstract

A measurement of the high-lying states in 208Pb has been made using 17O beams at 20 MeV/u. The gamma decay following inelastic excitation was measured with the detector system AGATA Demonstrator based on segmented HPGe detectors, coupled to an array of large volume LaBr3:Ce scintillators and to an array of Si detectors. Preliminary results in comparison with (γ,γ’) data, for states in the 5-8 MeV energy interval, are presented.

Published
2014
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41. PMT saturation due to large dynamic range

Author

Bruni, G., Díaz Fernández, P., Johansson, H. T., Heinz, A., Nilsson, T., Tengblad, O, Alvarez-Pol, H., Cederkäll, Joakim, Casarejos, E., Cortina-Gil, D., Galaviz Redondo, D., Gernhäuser, R., Heiss, B., Klenze, P., Golubev, Pavel, Hartig, A.-L., Knyazev, Alexander, Kröll, T., Park, J., Perea, A., Rhee, H.-B., Teubig, P., and Zieblinski, M.

Subjects
Subatomic Physics
Published
2018

42. Tests of CALIFA Barrel modules at CCB in Krakow

Author

Park, Joochun, Heiss, B., Hartig, A.-L., Alvarez-Pol, H., Bruni, G., Casarejos, E., Cederkäll, Joakim, Cortina-Gil, D., Díaz Fernández, P., Galaviz, D., Gernhäuser, R., Golubev, Pavel, Heinz, A., Johansson, H. T., Klenze, P., Knyazev, Alexander, Kröll, T., Nilsson, T., Perea, A., Rhee, H. B., Tengblad, O., Teubig, P., Zieblinski, M., and Califa Collaboration

Subjects
Subatomic Physics
Published
2018

43. Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA

Author

Hadynska-Klek, K, Napiorkowski, PJ, Zielinska, M, Srebrny, J, Maj, A, Azaiez, F, Dobon, JJ Valiente, Kicinska-Habior, M, Nowacki, F, Naidja, H, Bounthong, B, Rodriguez, TR, de Angelis, G, Abraham, T, Kumar, G Anil, Bazzacco, D, Bellato, M, Bortolato, D, Bednarczyk, P, Benzoni, G, Berti, L, Birkenbach, B, Bruyneel, B, Brambilla, S, Camera, F, Chavas, J, Cederwall, B, Charles, L, Ciemala, M, Cocconi, P, Coleman-Smith, P, Colombo, A, Corsi, A, Crespi, FCL, Cullen, DM, Czermak, A, Desesquelles, P, Doherty, DT, Dulny, B, Eberth, J, Farnea, E, Fornal, B, Franchoo, S, Gadea, A, Giaz, A, Gottardo, A, Grave, X, Grebosz, J, Gorgen, A, Gulmini, M, Habermann, T, Hess, H, Isocrate, R, Iwanicki, J, Jaworski, G, Judson, DS, Jungclaus, A, Karkour, N, Kmiecik, M, Karpinski, D, Kisielinski, M, Kondratyev, N, Korichi, A, Komorowska, M, Kowalczyk, M, Korten, W, Krzysiek, M, Lehaut, G, Leoni, S, Ljungvall, J, Lopez-Martens, A, Lunardi, S, Maron, G, Mazurek, K, Menegazzo, R, Mengoni, D, Merchan, E, Meczynski, W, Michelagnoli, C, Million, B, Myalski, S, Napoli, DR, Niikura, M, Obertelli, A, Ozmen, SF, Palacz, M, Prochniak, L, Pullia, A, Quintana, B, Rampazzo, G, Recchia, F, Redon, N, Reiter, P, Rosso, D, Rusek, K, Sahin, E, Salsac, M-D, Soderstrom, P-A, Stefan, I, Stezowski, O, Styczen, J, Theisen, Ch, Toniolo, N, Ur, CA, Wadsworth, R, Wasilewska, B, Wiens, A, Wood, JL, Wrzosek-Lipska, K, and Zieblinski, M

Published
2018

44. Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA

Author

Hadynska-Klek, K., Napiorkowski, P. J., Zielinska, M., Srebrny, J., Maj, A., Azaiez, F., Dobon, J. J. Valiente, Kicinska-Habior, M., Nowacki, F., Naidja, H., Bounthong, B., Rodriguez, T. R., de Angelis, G., Abraham, T., Kumar, G. Anil, Bazzacco, D., Bellato, M., Bortolato, D., Bednarczyk, P., Benzoni, G., Berti, L., Birkenbach, B., Bruyneel, B., Brambilla, S., Camera, F., Chavas, J., Cederwall, B., Charles, L., Ciemala, M., Cocconi, P., Coleman-Smith, P., Colombo, A., Corsi, A., Crespi, F. C. L., Cullen, D. M., Czermak, A., Desesquelles, P., Doherty, D. T., Dulny, B., Eberth, J., Farnea, E., Fornal, B., Franchoo, S., Gadea, A., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Gorgen, A., Gulmini, M., Habermann, T., Hess, H., Isocrate, R., Iwanicki, J., Jaworski, G., Judson, D. S., Jungclaus, A., Karkour, N., Kmiecik, M., Karpinski, D., Kisielinski, M., Kondratyev, N., Korichi, A., Komorowska, M., Kowalczyk, M., Korten, W., Krzysiek, M., Lehaut, G., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lunardi, S., Maron, G., Mazurek, K., Menegazzo, R., Mengoni, D., Merchan, E., Meczynski, W., Michelagnoli, C., Million, B., Myalski, S., Napoli, D. R., Niikura, M., Obertelli, A., Ozmen, S. F., Palacz, M., Prochniak, L., Pullia, A., Quintana, B., Rampazzo, G., Recchia, F., Redon, N., Reiter, P., Rosso, D., Rusek, K., Sahin, E., Salsac, M-D, Söderström, Pär-Anders, Stefan, I., Stezowski, O., Styczen, J., Theisen, Ch., Toniolo, N., Ur, C. A., Wadsworth, R., Wasilewska, B., Wiens, A., Wood, J. L., Wrzosek-Lipska, K., Zieblinski, M., Hadynska-Klek, K., Napiorkowski, P. J., Zielinska, M., Srebrny, J., Maj, A., Azaiez, F., Dobon, J. J. Valiente, Kicinska-Habior, M., Nowacki, F., Naidja, H., Bounthong, B., Rodriguez, T. R., de Angelis, G., Abraham, T., Kumar, G. Anil, Bazzacco, D., Bellato, M., Bortolato, D., Bednarczyk, P., Benzoni, G., Berti, L., Birkenbach, B., Bruyneel, B., Brambilla, S., Camera, F., Chavas, J., Cederwall, B., Charles, L., Ciemala, M., Cocconi, P., Coleman-Smith, P., Colombo, A., Corsi, A., Crespi, F. C. L., Cullen, D. M., Czermak, A., Desesquelles, P., Doherty, D. T., Dulny, B., Eberth, J., Farnea, E., Fornal, B., Franchoo, S., Gadea, A., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Gorgen, A., Gulmini, M., Habermann, T., Hess, H., Isocrate, R., Iwanicki, J., Jaworski, G., Judson, D. S., Jungclaus, A., Karkour, N., Kmiecik, M., Karpinski, D., Kisielinski, M., Kondratyev, N., Korichi, A., Komorowska, M., Kowalczyk, M., Korten, W., Krzysiek, M., Lehaut, G., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lunardi, S., Maron, G., Mazurek, K., Menegazzo, R., Mengoni, D., Merchan, E., Meczynski, W., Michelagnoli, C., Million, B., Myalski, S., Napoli, D. R., Niikura, M., Obertelli, A., Ozmen, S. F., Palacz, M., Prochniak, L., Pullia, A., Quintana, B., Rampazzo, G., Recchia, F., Redon, N., Reiter, P., Rosso, D., Rusek, K., Sahin, E., Salsac, M-D, Söderström, Pär-Anders, Stefan, I., Stezowski, O., Styczen, J., Theisen, Ch., Toniolo, N., Ur, C. A., Wadsworth, R., Wasilewska, B., Wiens, A., Wood, J. L., Wrzosek-Lipska, K., and Zieblinski, M.

Abstract

ACoulomb-excitation experiment to study electromagnetic properties of Ca-42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. gamma rays from excited states in Ca-42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca-42, including the diagonal E2 matrix elements of 2(1)(+) and 2(2)(+) states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0(1),(+)(2) and 2(1,2)(+) states, as well as triaxiality for 0(1,2)(+) states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca-42.

Published
2018
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46. Experimental study of the isovector giant dipole resonance in Zr-80 and Rb-81

Author

ceruti, simone, Camera, F, Bracco, A, Mentana, A, Avigo, R, Benzoni, G, Blasi, N, Bocchi, G, Bottoni, S, Brambilla, S, Crespi, FCL, Giaz, A, Leoni, S, Million, B, Morales, AI, Nicolini, R, Pellegri, L, Riboldi, S, Wieland, O, Bazzacco, D, Ciemala, M, Farnea, E, Gottardo, A, Kmiecik, M, Maj, A, Mengoni, D, Michelagnoli, C, Modamio, V, Montanari, D, Napoli, D, Recchia, F, Sahin, E, Ur, C, Valiente-Dobon, JJ, Wasilewska, B, and Zieblinski, M

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The isovector giant dipole resonance (IVGDR) γ decay was measured in the compound nuclei 80Zr and 81Rb at an excitation energy of E∗=54 MeV. The fusion reaction 40Ca+40Ca at Ebeam=136 MeV was used to form the compound nucleus 80Zr, while the reaction 37Cl+44Ca at Ebeam=95 MeV was used to form the compound nucleus 81Rb at the same excitation energy. The IVGDR parameters extracted from the analysis were compared with the ones found at higher excitation energy (E∗=83 MeV). The comparison allows one to observe two different nuclear mechanisms: (i) the IVGDR intrinsic width remains constant with the excitation energy in the nucleus 81Rb; (ii) the isospin-violating spreading width (i.e., Coulomb spreading width) remains constant with the excitation energy in the nucleus 80Zr. The experimental setup used for the γ-ray detection was composed by the AGATA demonstrator array coupled to the large-volume LaBr3:Ce detectors of the HECTOR+ array. ispartof: Physical Review C vol:95 issue:1 status: published

Published
2017

47. Experimental study of the isovector giant dipole resonance in Zr 80 and Rb 81

Author

Ceruti, S., Camera, F., Bracco, A., Mentana, A., Avigo, R., Benzoni, G., Blasi, N., Bocchi, G., Bottoni, S., Brambilla, S., Crespi, F. C. L., Giaz, A., Leoni, S., Million, B., Morales, A. I., Nicolini, R., Pellegri, L., Riboldi, S., Wieland, O., Bazzacco, D., Ciemala, M., Farnea, E., Gottardo, A., Kmiecik, M., Maj, A., Mengoni, D., Michelagnoli, C., Modamio, V., Montanari, D., Napoli, D., Recchia, F., Sahin, E., Ur, C., Valiente-Dobón, J. J., Wasilewska, B., and Zieblinski, M.

Subjects
Nuclear and High Energy Physics
Published
2017

48. 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

49. Pygmy dipole resonance in ^140Ce via inelastic scattering of ^17O

Author

Krzysiek, M., Kmiecik, M., Maj, A., Bednarczyk, P., Bracco, A., Crespi, F. C. L., Lanza, E. G., Litvinova, E., Paar, Nils, Avigo, R., Bazzacco, D., Benzoni, G., Birkenbach, B., Blasi, N., Bottoni, S., Brambilla, S., Camera, F., Ceruti, S., Ciemala, M., de Angelis, G., Désesquelles, P., Eberth, J., Farnea, E., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., Isocarte, R., Jungclaus, A., Leoni, S., Ljungvall, J., Lunardi, S., Mazurek, K., Menegazzo, R., Mengoni, D., Michelagnoli, C., Milion, B., Morales, A. I., Napoli, D. R., Nicolini, R., Pellegri, L., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Salsac, M. D., Siebeck, B., Siem, S., Soderstrom, P.-A., Ur, C., Valiente-Dobon, J. J., Wieland, O., and Zieblinski, M.

Subjects
PRIRODNE ZNANOSTI. Fizika, pygmy resonance, NATURAL SCIENCES. Physics
Abstract

The γ decay from the high-lying states of ^140Ce excited via inelastic scattering of ^17O at a bombarding energy of 340 MeV was measured using the high-resolution AGATA-demonstrator array in coincidence with scattered ions detected in two segmented Δ E-E silicon detectors. Angular distributions of scattered ions and emitted γ rays were measured, as well as their differential cross sections. The excitation of 1^− states below the neutron separation energy is similar to the one obtained in reactions with the α isoscalar probe. The comparison between the experimental differential cross sections and the corresponding predictions using the distorted-wave Born approximation allowed us to extract the isoscalar component of identified 1^− pygmy states. For this analysis the form factor obtained by folding microscopically calculated transition densities and optical potentials was used.

Published
2016

50. Pygmy dipole resonance in Ce-140 via inelastic scattering of O-17

Author

Krzysiek, M., Kmiecik, M., Maj, A., Bednarczyk, P., Bracco, A., Crespi F. C., L., Lanza E., G., Litvinova, E., Paar, N., Avigo, R., Bazzacco, D., Benzoni, G., Birkenbach, B., Blasi, N., Bottoni, S., Brambilla, S., Camera, F., Ceruti, S., Ciemala, M., De Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., Isocarte, R., Jungclaus, A., Leoni, S., Ljungvall, J., Lunardi, S., Mazurek, K., Menegazzo, R., Mengoni, D., Michelagnoli, C., Milion, B., Morales A., I., Napoli D., R., Nicolini, R., Pellegri, L., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Salsac M., D., Siebeck, B., Siem, S., Soderstrom P., -A., Ur, C., Valiente-Dobon, J.J., Wieland, O., Zieblinski, M., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM SNO), and Université Paris-Saclay-Univ. Paris-Sud-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
IONS, [PHYS]Physics [physics], STATES, NUCLEI, EXCITATION, pygmy resonance, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], GAMMA-DECAY
Abstract

International audience; The gamma decay from the high-lying states of Ce-140 excited via inelastic scattering of O-17 at a bombarding energy of 340 MeV was measured using the high-resolution AGATA-demonstrator array in coincidence with scattered ions detected in two segmented Delta E-E silicon detectors. Angular distributions of scattered ions and emitted gamma rays were measured, as well as their differential cross sections. The excitation of 1(-) states below the neutron separation energy is similar to the one obtained in reactions with the alpha isoscalar probe. The comparison between the experimental differential cross sections and the corresponding predictions using the distorted-wave Born approximation allowed us to extract the isoscalar component of identified 1(-) pygmy states. For this analysis the form factor obtained by folding microscopically calculated transition densities and optical potentials was used.

Published
2016

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