TY  - JOUR
A1  - Moreno-Soto, Javier
A1  - Valenta, Stanislav
A1  - Berthoumieux, Eric
A1  - Chebboubi, Abdelaziz
A1  - Diakaki, Maria
A1  - Dridi, Wissem
A1  - Dupont, Emmeric
A1  - Gunsing, Frank
A1  - Krtička, Milan
A1  - Litaize, Olivier
A1  - Serot, Olivier
A1  - Aberle, Oliver
A1  - Alcayne, Victor
A1  - Amaducci, Simone
A1  - Andrzejewski, Józef
A1  - Audouin, Laurent
A1  - Bécares, Vicente
A1  - Babiano Suarez, Victor
A1  - Bacak, Michael
A1  - Barbagallo, Massimo
A1  - Thomas, Benedikt
A1  - Bennett, Samuel
A1  - Billowes, Jonathan
A1  - Bosnar, Damir
A1  - Brown, Adam
A1  - Busso, Maurizio
A1  - Caamano, Manuel
A1  - Caballero Ontanaya, Luis
A1  - Calviño Tavares, Francisco
A1  - Calviani, Marco
A1  - Cano-Ott, Daniel
A1  - Casanovas Hoste, Adrià
A1  - Cerutti, Francesco
A1  - Chiaveri, Enrico
A1  - Colonna, Nicola
A1  - Cortés Rossell, Guillem Pere
A1  - Cortés-Giraldo, Miguel Antonio
A1  - Cosentino, Luigi
A1  - Cristallo, Sergio
A1  - Damone, Lucia Anna
A1  - Davies, Paul John
A1  - Dietz, Mirco
A1  - Domingo-Pardo, César
A1  - Dressler, Rugard
A1  - Ducasse, Quentin
A1  - Durán, Ignacio
A1  - Eleme, Zinovia
A1  - Fernández Domínguez, Beatriz
A1  - Ferrari, Alfredo
A1  - Finocchiaro, Paolo
A1  - Furman, Valter
A1  - Göbel, Kathrin
A1  - Gawlik-Ramiega, Aleksandra
A1  - Gilardoni, Simone
A1  - Gonçalves, Isabel Maria Ferro
A1  - González Romero, Enrique Miguel
A1  - Guerrero Sánchez, Carlos
A1  - Heinitz, Stephan
A1  - Heyse, Jan
A1  - Jenkins, David
A1  - Junghans, Arnd Rudolf
A1  - Käppeler, Franz
A1  - Kadi, Yacine
A1  - Kimura, Atsushi
A1  - Knapova, Ingrid
A1  - Kokkoris, Michael
A1  - Kopatch, Yuri N.
A1  - Kurtulgil, Cem Deniz
A1  - Ladarescu, Ion
A1  - Lampoudis, Christos
A1  - Lederer-Woods, Claudia
A1  - Lonsdale, Sarah Jane
A1  - Macina, Daniela
A1  - Manna, Alice
A1  - Martinez, Trinitario
A1  - Masi, Alessandro
A1  - Massimi, Cristian
A1  - Mastinu, Pierfrancesco
A1  - Mastromarco, Mario
A1  - Maugeri, Emilio Andrea
A1  - Mazzone, Annamaria
A1  - Mendoza Cembranos, Emilio
A1  - Mengoni, Alberto
A1  - Michalopoulou, Veatriki
A1  - Milazzo, Paolo Maria
A1  - Mingrone, Federica
A1  - Musumarra, Agatino
A1  - Negret, Alexandru
A1  - Nolte, Ralf
A1  - Ogállar Ruiz, Francisco
A1  - Oprea, Andreea
A1  - Patronis, Nikolas
A1  - Pavlik, Andreas
A1  - Perkowski, Jarosław
A1  - Piersanti, Luciano
A1  - Petrone, Cristina
A1  - Pirovano, Elisa
A1  - Porras, Ignacio
A1  - Praena, Javier
A1  - Quesada Molina, José Manuel
A1  - Ramos Doval, Diego
A1  - Rauscher, Thomas
A1  - Reifarth, René
A1  - Rochman, Dimitri
A1  - Sabate-Gilarte, Marta
A1  - Saxena, Alok
A1  - Schillebeeckx, Peter
A1  - Schumann, Dorothea
A1  - Sekhar, Adhitya
A1  - Smith, Alastair Gavin
A1  - Sosnin, Nikolay V.
A1  - Sprung, Peter
A1  - Stamatopoulos, Athanasios
A1  - Tagliente, Giuseppe
A1  - Taı́n Enríquez, José Luis
A1  - Tarifeno-Saldivia, Ariel
A1  - Tassan-Got, Laurent
A1  - Torres-Sanchez, Pablo
A1  - Tsinganis, Andrea
A1  - Ulrich, Jiri
A1  - Urlaß, Sebastian
A1  - Vannini, Gianni
A1  - Variale, Vincenzo
A1  - Vaz, Pedro
A1  - Ventura, Alberto
A1  - Vescovi, Diego
A1  - Vlachoudis, Vasilis
A1  - Vlastou, Rosa
A1  - Wallner, Anton
A1  - Woods, Philip John
A1  - Wright, Tobias
A1  - Žugec, Petar
T1  - Constraints on the dipole photon strength for the odd uranium isotopes
T2  - Physical review C
N2  - 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.
KW  - Electromagnetic transitions
KW  - Models & methods for nuclear reactions
KW  - Neutron physics
KW  - Nuclear reactions
KW  - Radiative capture
KW  - Resonance reactions
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62900
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-629006
SN  - 2469-9993
N1  - The work was supported by the MŠMT of the Czech Republic, the Charles University Project No. UNCE/SCI/013, and by the funding agencies of the participating institutes.
VL  - 105
IS  - art. 024618
SP  - 1
EP  - 14
PB  - Inst.
CY  - Woodbury, NY
ER  -