Cross section measurements of Gd-155,Gd-157(n,) induced by thermal and epithermal neutrons

Mastromarco, M. and Manna, A. and Aberle, O. and Andrzejewski, J. and Audouin, L. and Bacak, M. and Balibrea, J. and Barbagallo, M. and Becvar, F. and Berthoumieux, E. and Billowes, J. and Bosnar, D. and Brown, A. and Caamano, M. and Calvino, F. and Calviani, M. and Cano-Ott, D. and Cardella, R. and Casanovas, A. and Castelluccio, D. M. and Cerutti, F. and Chen, Y. H. and Chiaveri, E. and Clai, G. and Colonna, N. and Cortes, G. and Cortes-Giraldo, M. A. and Cosentino, L. and Damone, L. A. and Diakaki, M. and Domingo-Pardo, C. and Dressler, R. and Dupont, E. and Duran, I. and Fernandez-Dominguez, B. and Ferrari, A. and Ferreira, P. and Finocchiaro, P. and Furman, V. and Gobel, K. and Garcia, A. R. and Gawlik, A. and Gilardoni, S. and Glodariu, T. and Goncalves, I. F. and Gonzalez-Romero, E. and Griesmayer, E. and Guerrero, C. and Gunsing, F. and Guglielmelli, A. and Harada, H. and Heinitz, S. and Heyse, J. and Jenkins, D. G. and Jericha, E. and Kappeler, F. and Kadi, Y. and Kalamara, A. and Kavrigin, P. and Kimura, A. and Kivel, N. and Knapova, I. and Kokkoris, M. and Krticka, M. and Kurtulgil, D. and Leal-Cidoncha, E. and Lederer, C. and Leeb, H. and Lerendegui-Marco, J. and Lonsdale, S. J. and Macina, D. and Marganiec, J. and Martinez, T. and Masi, A. and Massimi, C. and Mastinu, P. and Maugeri, E. A. and Mazzone, A. and Mendoza, E. and Mengoni, A. and Milazzo, P. M. and Mingrone, F. and Musumarra, A. and Negret, A. and Nolte, R. and Oprea, A. and Patronis, N. and Pavlik, A. and Perkowski, J. and Porras, I. and Praena, J. and Quesada, J. M. and Radeck, D. and Rauscher, T. and Reifarth, R. and Rocchi, F. and Rubbia, C. and Ryan, J. A. and Sabate-Gilarte, M. and Saxena, A. and Schillebeeckx, P. and Schumann, D. and Sedyshev, P. and Smith, A. G. and Sosnin, N. V. and Stamatopoulos, A. and Tagliente, G. and Tain, J. L. and Tarifeno-Saldivia, A. and Tassan-Got, L. and Valenta, S. and Vannini, G. and Variale, V. and Vaz, P. and Ventura, A. and Vlachoudis, V. and Vlastou, R. and Wallner, A. and Warren, S. and Weiss, C. and Winants, R. and Woods, P. J. and Wright, T. and Zugec, P.. (2019) Cross section measurements of Gd-155,Gd-157(n,) induced by thermal and epithermal neutrons. EUROPEAN PHYSICAL JOURNAL A, 55 (1). ARTN9.

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.Neutron capture cross section measurements on Gd-155 and Gd-157 were performed using the time-of-flight technique at the n_TOF facility at CERN on isotopically enriched samples. The measurements were carried out in the n_TOF experimental area EAR1, at 185 m from the neutron source, with an array of 4 C6D6 liquid scintillation detectors. At a neutron kinetic energy of 0.0253 eV, capture cross sections of 62.2(2.2) and 239.8(8.4) kilobarn have been derived for Gd-155 and Gd-157, respectively, with up to 6% deviation relative to values presently reported in nuclear data libraries, but consistent with those values within 1.6 standard deviations. A resonance shape analysis has been performed in the resolved resonance region up to 181 eV and 307 eV, respectively for Gd-155 and Gd-157, where on average, resonance parameters have been found in good agreement with evaluations. Above these energies and up to 1 keV, the observed resonance-like structure of the cross section has been analysed and characterised. From a statistical analysis of the observed neutron resonances we deduced: neutron strength function of 2.01(28)x10-4 and 2.17(41)x10-4; average total radiative width of 106.8(14) meV and 101.1(20) meV and s-wave resonance spacing 1.6(2) eV and 4.8(5) eV for n + Gd-155 and n + Gd-157 systems, respectively.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:08 Oct 2019 09:32
Deposited On:08 Oct 2019 09:32

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