Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524
Qrcode

Article

J. Korean Phy. Soc. 2011; 59(2(3)): 1510-1513

Published online August 12, 2011     https://doi.org/10.3938/jkps.59.1510

Copyright © The Korean Physical Society.

Study of Photon Strength Function of Actinides: the Case of 235U, 238Np and 241Pu

C. Guerrero, F. Alvarez-Velarde, D. Cano-Ott, T. Martiez, E. Mendoza, D. Villamarin, N. Colonna, M. H. Meaze, S. Marrone, G. Tagliente, R. Terlizzi, F. Belloni, U. Abbondanno, K. Fujii, P. M. Milazzo, C. Moreau, G. Aerts, E. Berthoumieux, W. Dridi, F. Gunsing, J. Pancin, L. Perrot, A. Plukis, H. Alvarez, I. Duran, C. Paradela, S. Andriamonje, M. Calviani, E. Chiaveri, E. Gonzalez-Romero, Y. Kadi, M. C. Vicente, V. Vlachoudis, J. Andrzejewski, J. Marganiec, P. Assimakopoulos, D. Karadimos, D. Karamanis, C. Papachristodoulou, N. Patronis, L. Audouin, S. David, L. Ferrant, S. Isaev, C. Stephan, L. Tassan-Got, G. Badurek, E. Jericha, H. Leeb, H. Oberhummer, M. T. Pigni, P. Baumann, M. Kerveno, S. Lukic, G. Rudolf, F. Becvar, M. Krticka, F. Calvino, R. Capote, A. Carrillo De Albornoz, L. Marques, J. Salgado, L. Tavora, P. Vaz, P. Cennini, M. Dahlfors, A. Ferrari, F. Gramegna, A. Herrera-Martinez, P. Mastinu, J. Praena, L. Sarchiapone, H. Wendler, V. Chepel, R. Ferreira-Marques, I. Goncalves, A. Lindote, I. Lopes, F. Neves, G. Cortes, A. Poch, C. Pretel, A. Couture, J. Cox, S. O'brien, M. Wiescher, I. Dillman, F. Kappeler, M. Mosconi, R. Plag, F. Voss, S. Walter, K. Wisshak, R. Dolfini, C. Rubbia, C. Domingo-Pardo, J. L. Tain, C. Eleftheriadis, I. Savvidis, H. Frais-Koelbl, E. Griesmayer, W. Furman, V. Konovalov, A. Goverdovski, V. Ketlerov, B. Haas, R. Haight, R. Reifarth, M. Heil, M. Igashira, P. Koehler, E. Kossionides, C. Lampoudis, M. Lozano, J. Quesada, C. Massimi, G. Vannini, A. Mengoni, M. Oshima, C. Papadopoulos, R. Vlastou, A. Pavlik, P. Pavlopoulos, A. Plompen, P. Rullhusen, T. Rauscher, M. Rosetti, A. Ventura

Abstract

The decay from excited levels in medium and heavy nuclei can be described in a statisticalapproach by means of Photon Strength Functions and Level Density distributions. The study of electromagnetic cascades following neutron capture based on the use of high eciency detectors has been shown to be well suited for probing the properties of the Photon Strength Function of heavy (high level density) and/or radioactive (high background) nuclei. In this work we have investigated for the first time the validity of the recommended PSF of actinides, in particular 235U, 238Np and 241Pu. Our study includes the search for resonance structures in the PSF below Sn and draws conclusions regarding their existence and their characteristics in terms of energy, width and electromagnetic nature.

Keywords: Photon/Gamma Strength Functions, pygmy, scissor mode, n_TOF, Total Absorption Calorimeter, TAC, neutron capture