Refine
Author
- Caamano, Manuel (3) (remove)
Document Type
- Article (3)
Language
- English (3)
Has Fulltext
- yes (3)
Is part of the Bibliography
- no (3)
Keywords
Ribeiro Jimenez, Guillermo ; Nácher González, Enrique ; Tengblad, Olof ; Díaz Fernández, Paloma ; Aksyutina, Yuliya ; Alvarez-Pol, Héctor ; Atar, Leyla ; Aumann, Thomas ; Avdeichikov, Vladimir ; Beceiro-Novo, Saul ; Bemmerer, Daniel ; Benlliure Anaya, Jose Fernando ; Bertulani, Carlos A. ; Boillos Betete, Juan Manuel ; Boretzky, Konstanze ; Garcia Borge, Maria José ; Caamano, Manuel ; Caesar, Christoph ; Casarejos Ruiz, Enrique ; Catford, Wilton N. ; Cederkäll, Joakim ; Chartier, Marielle ; Chulkov, Leonid V. ; Cortina Gil, Dolores ; Cravo, Edgar ; Crespo, Raquel ; Datta Pramanik, Ushasi ; Dillmann, Iris ; Elekes, Zoltán ; Enders, Joachim ; Ershova, Olga ; Estradé Vaz, Alfredo ; Farinon, Fabio ; Fraile Prieto, Luis Mario ; Freer, Martin ; Fynbo, Hans Otto Uldall ; Galaviz Redondo, Daniel ; Geissel, Hans ; Gernhäuser, Roman ; Golubev, Pavel ; Göbel, Kathrin ; Hagdahl, Julius ; Heftrich, Tanja ; Heil, Michael ; Heine, Marcel ; Heinz, Andreas ; Henriques, Ana ; Holl, Matthias ; Hufnagel, A. ; Ignatov, Alexander ; Johansson, Håkan T. ; Jonson, Björn ; Kalantar-Nayestanaki, Nasser ; Kanungo, Rituparna ; Kelic-Heil, Aleksandra ; Kurz, Nikolaus ; Kröll, Thorsten ; Labiche, Marc ; Langer, Christoph ; Le Bleis, Tudi ; Lemmon, Roy Crawford ; Lindberg, Simon ; Machado, Jorge ; Marganiec, Justyna ; Movsesyan, Alina ; Nilsson, Thomas ; Nociforo, Chiara ; Panin, Valerii ; Paschalis, Stefanos ; Perea Martinez, Angel ; Petri, Marina ; Pietri, Stephane ; Plag, Ralf ; Reifarth, René ; Rigollet, Catherine ; Riisager, Karsten ; Rossi, Dominic M. ; Röder, Marko ; Savran, Deniz ; Scheit, Heiko ; Simon, Haik ; Sorlin, Olivier ; Syndikus, Ina ; Taylor, Jonathan Thomas ; Thies, Ronja ; Velho, Paulo ; Wagner, Andreas ; Wamers, Felix ; Vandebrouck, Marine ; Weick, Helmut ; Wheldon, Carl ; Wilson, Gemma Louise ; Wimmer, Christine ; Winfield, John S. ; Woods, Philip John ; Zhukov, Mikhail V. ; Zilges, Andreas ; Zuber, Kai
The neutron-unbound isotope 13Be has been studied in several experiments using different reactions, different projectile energies, and different experimental setups. There is, however, no real consensus in the interpretation of the data, in particular concerning the structure of the low-lying excited states. Gathering new experimental information, which may reveal the 13Be structure, is a challenge, particularly in light of its bridging role between 12Be, where the N = 8 neutron shell breaks down, and the Borromean halo nucleus 14Be. The purpose of the present study is to investigate the role of bound excited states in the reaction product 12Be after proton knockout from 14B, by measuring coincidences between 12Be, neutrons, and γ rays originating from de-excitation of states fed by neutron decay of 13Be. The 13Be isotopes were produced in proton knockout from a 400 MeV/nucleon 14B beam impinging on a CH2 target. The 12 Be-n relative-energy spectrum d σ /d Ef n was obtained from coincidences between 12Be(g.s.) and a neutron, and also as threefold coincidences by adding γ rays, from the de-excitation of excited states in 12Be. Neutron decay from the first 5/2+ state in 13Be to the 2+ state in 12Be at 2.11 MeV is confirmed. An energy independence of the proton-knockout mechanism is found from a comparison with data taken with a 35 MeV/nucleon 14B beam. A low-lying p-wave resonance in 13Be(1/2−) is confirmed by comparing proton- and neutron-knockout data from 14B and 14Be.
Reifarth, René ; Altstadt, Sebastian ; Göbel, Kathrin ; Heftrich, Tanja ; Heil, Michael ; Koloczek, Alexander ; Langer, Christoph ; Plag, Ralf ; Pohl, M. ; Sonnabend, Kerstin ; Weigand, Mario ; Adachi, T. ; Aksouh, Farouk ; Al-Khalili, J. ; AlGarawi, M. ; AlGhamdi, S. ; Alkhazov, G. ; Alkhomashi, N. ; Alvarez-Pol, Héctor ; Alvarez-Rodriguez, R. ; Andreev, V. ; Andrei, B. ; Atar, Leyla ; Aumann, Thomas ; Avdeichikov, Vladimir ; Bacri, C. ; Bagchi, S. ; Barbieri, Carlo ; Beceiro, Saul ; Beck, C. ; Beinrucker, Clemens ; Belier, Gilbert ; Bemmerer, Daniel ; Bendel, M. ; Benlliure Anaya, Jose Fernando ; Benzoni, G. ; Berjillos, R. ; Bertini, D. ; Bertulani, Carlos A. ; Bishop, S. ; Blasi, N. ; Bloch, T. ; Blumenfeld, Y. ; Bonaccorso, A. ; Boretzky, Konstanze ; Botvina, Alexander ; Boudard, A. ; Boutachkov, P. ; Boztosun, I. ; Bracco, A. ; Brambilla, S. ; Monago, J.Briz ; Caamano, Manuel ; Caesar, Christoph ; Camera, F. ; Casarejos Ruiz, Enrique ; Catford, Wilton N. ; Cederkäll, Joakim ; Cederwall, B. ; Chartier, Marielle ; Chatillon, Audrey ; Cherciu, M. ; Chulkov, Leonid V. ; Coleman-Smith, P. ; Cortina Gil, Dolores ; Crespi, F. ; Crespo, Raquel ; Cresswell, J. ; Csatlós, Margit ; Déchery, F. ; Davids, B. ; Davinson, Thomas ; Derya, Vera ; Detistov, P. ; Díaz Fernández, Paloma ; DiJulio, D. ; Dmitry, S. ; Doré, D. ; Dueñas, J. ; Dupont, Emmeric ; Egelhof, Peter ; Egorova, I. ; Elekes, Zoltán ; Enders, Joachim ; Endres, Janis ; Ershov, S. ; Ershova, Olga ; Fernández Domínguez, Beatriz ; Fetisov, A. ; Fiori, Enrico ; Fomichev, A. ; Fonseca, M. ; Fraile, L. ; Freer, Martin ; Friese, Jürgen ; Garcia Borge, Maria José ; Galaviz Redondo, Daniel ; Gannon, S. ; Garg, U. ; Gašparić, Igor ; Gasques, L. ; Gastineau, B. ; Geissel, Hans ; Gernhäuser, Roman ; Ghosh, T. ; Gilbert, M. ; Glorius, Jan ; Golubev, Pavel ; Gorshkov, Alexander ; Gourishetty, A. ; Grigorenko, Leonid V. ; Gulyas, J. ; Haiduc, Maria ; Hammache, F. ; Harakeh, Muhsin N. ; Hass, M. ; Heine, Marcel ; Hennig, Andreas ; Henriques, Ana ; Herzberg, Rolf-Dietmar ; Holl, Matthias ; Ignatov, Alexander ; Ignatyuk, A. ; Ilieva, Stoyanka ; Ivanov, Marian ; Iwasa, N. ; Jakobsson, B. ; Johansson, Håkan T. ; Jonson, Björn ; Joshi, P. ; Junghans, Arnd Rudolf ; Jurado Apruzzese, Beatriz ; Körner, G. ; Kalantar, N. ; Kanungo, Rituparna ; Kelic-Heil, Aleksandra ; Kezzar, K. ; Khan, E. ; Khanzadeev, Alexei ; Kiselev, Oleg A. ; Kogimtzis, M. ; Körper, D. ; Kräckmann, S. ; Kröll, Thorsten ; Krücken, Reiner ; Krasznahorkay, A. ; Kratz, Jens-Volker ; Kresan, Dmytro ; Krings, Thomas ; Krumbholz, A. ; Krupko, S. ; Kulessa, Reinhard ; Kumar, Shyam ; Kurz, Nikolaus ; Kuzmin, E. ; Labiche, Marc ; Langanke, Karlheinz ; Lazarus, I. ; Bleis, T.Le ; Lederer, Claudia ; Lemasson, A. ; Lemmon, Roy Crawford ; Liberati, V. ; Litvinov, Yuri A. ; Löher, Bastian ; Herraiz, J.Lopez ; Münzenberg, G. ; Machado, Jorge ; Maev, E. ; Mahata, Kripamay ; Mancusi, D. ; Marganiec, Justyna ; Perez, M.Martinez ; Marusov, V. ; Mengoni, D. ; Million, B. ; Morcelle, V. ; Moreno, O. ; Movsesyan, Alina ; Nácher González, Enrique ; Najafi, Mohammad Ali ; Nakamura, T. ; Naqvi, F. ; Nikolski, E. ; Nilsson, Thomas ; Nociforo, Chiara ; Nolan, P. ; Novatsky, B. ; Nyman, Göran Hugo ; Ornelas, A. ; Palit, R. ; Pandit, S. ; Panin, Valerii ; Paradela Dobarro, Carlos ; Parkar, V. ; Paschalis, Stefanos ; Pawłowski, P. ; Perea Martinez, Angel ; Pereira, J. ; Petrache, C. ; Petri, Marina ; Pickstone, Simon Glynn ; Pietralla, Norbert ; Pietri, Stephane ; Pivovarov, Y. ; Potlog, P. ; Prokofiev, A. ; Rastrepina, G. ; Rauscher, Thomas ; Ribeiro Jimenez, Guillermo ; Ricciardi, Maria Valentina ; Richter, Achim ; Rigollet, Catherine ; Riisager, Karsten ; Rios, A. ; Ritter, C. ; Rodríguez Frutos, Tomás Raúl ; Rodríguez Vignote, Javier ; Röder, Marko ; Romig, Christopher ; Rossi, Dominic M. ; Roussel-Chomaz, P. ; Rout, Prakash Chandra ; Roy, S. ; Söderström, P. ; Saha Sarkar, Maitreyee ; Sakuta, S. ; Salsac, M. ; Sampson, J. ; Sanchez, J. ; Saez, del Rio ; Rosado, J.Sanchez ; Sanjari, Mohammad Shahab ; Sarriguren, P. ; Sauerwein, Anne ; Savran, Deniz ; Scheidenberger, Christoph ; Scheit, Heiko ; Schmidt, Stefan ; Schmitt, C. ; Schnorrenberger, Linda ; Schrock, P. ; Schwengner, R. ; Seddon, D. ; Sherrill, B. ; Shrivastava, A. ; Sidorchuk, S. ; Silva, Joel ; Simon, Haik ; Simpson, E. ; Singh, P. ; Slobodan, D. ; Sohler, D. ; Spieker, Mark-Christoph ; Stach, D. ; Stan, E. ; Stanoiu, M. ; Stepantsov, S. ; Stevenson, P. ; Strieder, F. ; Stuhl, László ; Suda, T. ; Sümmerer, Klaus ; Streicher, Branislav ; Taieb, Julien ; Takechi, M. ; Tanihata, I. ; Taylor, J. ; Tengblad, Olof ; Ter-Akopian, G. ; Terashima, S. ; Teubig, P. ; Thies, Ronja ; Thoennessen, M. ; Thomas, T. ; Thornhill, J. ; Thungstrom, G. ; Timar, J. ; Togano, Yasuhiro ; Tomohiro, U. ; Tornyi, T. ; Tostevin, J. ; Townsley, C. ; Trautmann, Wolfgang ; Trivedi, T. ; Typel, Stefan ; Uberseder, E. ; Udias, J. ; Uesaka, T. ; Uvarov, L. ; Vajta, Z. ; Velho, Paulo ; Vikhrov, V. ; Volknandt, Meiko ; Volkov, Vasily ; Neumann-Cosel, Peter von ; Schmid, Mirko von ; Wagner, A. ; Wamers, Felix ; Weick, Helmut ; Wells, D. ; Westerberg, L. ; Wieland, Oliver ; Wiescher, Michael ; Wimmer, Christine ; Wimmer, K. ; Winfield, John S. ; Winkel, M. ; Woods, Philip John ; Wyss, R. ; Yakorev, Dmitry ; Yavor, M. ; Zamora Cardona, Juan Carlos ; Zartova, I. ; Zerguerras, T. ; Zgura, M. ; Zhdanov, A. ; Zhukov, Mikhail V. ; Zieblinski, M. ; Zilges, Andreas ; Zuber, Kai
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 β-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.
Moreno-Soto, Javier ; Valenta, Stanislav ; Berthoumieux, Eric ; Chebboubi, Abdelaziz ; Diakaki, Maria ; Dridi, Wissem ; Dupont, Emmeric ; Gunsing, Frank ; Krtička, Milan ; Litaize, Olivier ; Serot, Olivier ; Aberle, Oliver ; Alcayne, Victor ; Amaducci, Simone ; Andrzejewski, Józef ; Audouin, Laurent ; Bécares, Vicente ; Babiano Suarez, Victor ; Bacak, Michael ; Barbagallo, Massimo ; Thomas, Benedikt ; Bennett, Samuel ; Billowes, Jonathan ; Bosnar, Damir ; Brown, Adam ; Busso, Maurizio ; Caamano, Manuel ; Caballero Ontanaya, Luis ; Calviño Tavares, Francisco ; Calviani, Marco ; Cano-Ott, Daniel ; Casanovas Hoste, Adrià ; Cerutti, Francesco ; Chiaveri, Enrico ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Cosentino, Luigi ; Cristallo, Sergio ; Damone, Lucia Anna ; Davies, Paul John ; Dietz, Mirco ; Domingo-Pardo, César ; Dressler, Rugard ; Ducasse, Quentin ; Durán, Ignacio ; Eleme, Zinovia ; Fernández Domínguez, Beatriz ; Ferrari, Alfredo ; Finocchiaro, Paolo ; Furman, Valter ; Göbel, Kathrin ; Gawlik-Ramiega, Aleksandra ; Gilardoni, Simone ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Guerrero Sánchez, Carlos ; Heinitz, Stephan ; Heyse, Jan ; Jenkins, David ; Junghans, Arnd Rudolf ; Käppeler, Franz ; Kadi, Yacine ; Kimura, Atsushi ; Knapova, Ingrid ; Kokkoris, Michael ; Kopatch, Yuri N. ; Kurtulgil, Cem Deniz ; Ladarescu, Ion ; Lampoudis, Christos ; Lederer-Woods, Claudia ; Lonsdale, Sarah Jane ; Macina, Daniela ; Manna, Alice ; Martinez, Trinitario ; Masi, Alessandro ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Maugeri, Emilio Andrea ; Mazzone, Annamaria ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Michalopoulou, Veatriki ; Milazzo, Paolo Maria ; Mingrone, Federica ; Musumarra, Agatino ; Negret, Alexandru ; Nolte, Ralf ; Ogállar Ruiz, Francisco ; Oprea, Andreea ; Patronis, Nikolas ; Pavlik, Andreas ; Perkowski, Jarosław ; Piersanti, Luciano ; Petrone, Cristina ; Pirovano, Elisa ; Porras, Ignacio ; Praena, Javier ; Quesada Molina, José Manuel ; Ramos Doval, Diego ; Rauscher, Thomas ; Reifarth, René ; Rochman, Dimitri ; Sabate-Gilarte, Marta ; Saxena, Alok ; Schillebeeckx, Peter ; Schumann, Dorothea ; Sekhar, Adhitya ; Smith, Alastair Gavin ; Sosnin, Nikolay V. ; Sprung, Peter ; Stamatopoulos, Athanasios ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tarifeno-Saldivia, Ariel ; Tassan-Got, Laurent ; Torres-Sanchez, Pablo ; Tsinganis, Andrea ; Ulrich, Jiri ; Urlaß, Sebastian ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Vescovi, Diego ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Woods, Philip John ; Wright, Tobias ; Žugec, Petar
Background: The photon strength functions (PSFs) and nuclear level density (NLD) are key ingredients for calculation of the photon interaction with nuclei, in particular the reaction cross sections. These cross sections are important especially in nuclear astrophysics and in the development of advanced nuclear technologies.
Purpose: The role of the scissors mode in the M1 PSF of (well-deformed) actinides was investigated by several experimental techniques. The analyses of different experiments result in significant differences, especially on the strength of the mode. The shape of the low-energy tail of the giant electric dipole resonance is uncertain as well. In particular, some works proposed a presence of the E1 pygmy resonance just above 7 MeV. Because of these inconsistencies additional information on PSFs in this region is of great interest.
Methods: The γ-ray spectra from neutron-capture reactions on the 234U, 236 U, and 238 U nuclei have been measured with the total absorption calorimeter of the n_TOF facility at CERN. The background-corrected sum-energy and multi-step-cascade spectra were extracted for several isolated s-wave resonances up to about 140 eV.
Results: The experimental spectra were compared to statistical model predictions coming from a large selection of models of photon strength functions and nuclear level density. No combination of PSF and NLD models from literature is able to globally describe our spectra. After extensive search we were able to find model combinations with modified generalized Lorentzian (MGLO) E1 PSF, which match the experimental spectra as well as the total radiative widths.
Conclusions: The constant temperature energy dependence is favored for a NLD. The tail of giant electric dipole resonance is well described by the MGLO model of the E1 PSF with no hint of pygmy resonance. The M1 PSF must contain a very strong, relatively wide, and likely double-resonance scissors mode. The mode is responsible for about a half of the total radiative width of neutron resonances and significantly affects the radiative cross section.
- 1 to 3