A. Ignatov

Performance of timing resistive plate chambers with relativistic neutrons from 300 to 1500 MeV

A prototype composed of four resistive plate chamber layers has been exposed to quasi-monoenergetic neutrons produced from a deuteron beam of varying energy (300 to 1500 AMeV) in experiment S406 at GSI, Darmstad, Germany. Each layer, with an active area of about 2000 × 500 mm2, is made of modules containing the active gaps, all in multigap construction. Each gap is defined by 0.3 mm nylon mono-filaments positioned between 2.85 mm thick float glass electrodes. The modules are operated in avalanche mode with a non-flammable gas mixture composed of 90% C2H2F4 and 10% SF6. The signals are readout by a pick-up electrode formed by 15 copper strips (per layer), spaced at a pitch of 30 mm, connected at both sides to timing front end electronics. Measurements of the time of flight jitter of neutrons, in the mentioned energy range, point to a contribution of the resistive plate chamber in the order of 150 ps, independent of the neutron energy.

Lifetime Measurements in Neutron-rich Xe Isotopes - Evolution of Quadrupole Collectivity Beyond

Picosecond lifetimes of excited states in neutron-rich Xe isotopes were measured at the Institut Laue- Langevin via

^{132}

\gamma

Sn

-ray spectroscopy of fission fragments from neutron-induced fission of 235U and 241Pu targets. The data collected with the recently installed fast timing array FATIMA in combination with the EXOGAM Ge array were analysed using the new generalized centroid difference method. Our aim is to study the quadrupole and octupole collectivity, arising in the mass region beyond the doubly magic 132Sn, by means of transition probabilities. These can be calculated from the directly measured lifetimes.

The CALIFA endcap

D. Cortina-Gil ∗1, H. Alvarez-Pol 1, T. Aumann13, V. Avdeichikov 4, M. Bendel†7, J. Benlliure1, D. Bertini5, A. Bezbakh 11, T. Bloch13, M. Böhmer7, M.J.G. Borge2, J.A. Briz2, P. Cabanelas 1, E. Casarejos 8, M. Carmona Gallardo2, J. Cederk̈all4, L. Chulkov12, M. Dierigl7, D. Di Julio4, G. Ferńandez Maŕ ınez13, E. Fiori10, A. Fomichev 11, D. Galaviz9, R. Gernḧauser7, J. Gerl5, P. Golubev4, M. Golovkov11, D. Gonźalez1, A. Gorshkov 11, A.L. Hartig13, A. Heinz3, M. Heil5, B. Heiss7, A. Ignatov13, B. Jakobsson 4, H.T. Johansson 3, P. Klenze7, D. Köeper5, Th. Kröll13, R. Krücken‡7, S. Krupko11, F. Kurz7, T. Le Bleis7, B. Löher10, E. Nacher 2, T. Nilsson3, A. Perea2, C. Pfeffer7, B. Pietras1, R. Reifarth6, P. Remmels 7, H.B. Rhee13, J. Sanchez del Rio 2, D. Savran10, H. Scheit 13, S. Sidorchuk 11, H. Simon5, O. Tengblad2, P. Teubig9, R. Thies3, J.A. Viĺan8, M. von Schmid13, M. Winkel§7, S. Winkler 7, F. Wamers13, P. Yãnez8, and the RB collaboration. 1Universidad de Santiago de Compostela; 2Instituto Estructura de la Materia, CSIC Madrid; 3Chalmers University of Technology, Göteborg; 4Lund University; 5Helmholtzzentrum für Schwerionenforschung, Darmstadt; 6Goethe University Frankfurt am Main;7Technische Universität München; 8Universidad de Vigo;9Centro de Fı́sica Nuclear da Universidade de Lisboa; 10Extreme Matter Institute and Research Division, GSI; 11Joint Institute for Nuclear Research, Dubna; 12Nuclear Reseach Center, Kurchatov Institute Moscow; 13Technische Universität Darmstadt

First results of the (n,γ) EXILL campaigns at the Institut Laue Langevin using EXOGAM and FATIMA

At the PF1B cold neutron beam line at the Institut Laue Langevin the EXILL array consisting of EXOGAM, GASP and LOHENGRIN detectors was used to perform (n,γ) measurements under very high coincidence rates. About ten different reactions were then measured in autumn 2012. In spring 2013 the EXOGAM array was combined with 16 LaBr3(Ce) scintillators in the FATIMA@EXILL campaign for the measurement of lifetimes using the generalised centroid difference method. We report on the properties of both set-ups and present first results on Pt isotopes from both campaigns.

Progress report of the CALIFA/

D. Cortina-Gil †1, H. Alvarez-Pol1, T. Aumann13, V. Avdeichikov4, M. Bendel7, J. Benlliure1, D. Bertini5, A. Bezbakh11, T. Bloch13, M. Böhmer7, M.J.G. Borge2, J.A. Briz2, P. Cabanelas1, E. Casarejos8, M. Carmona Gallardo2, J. Cederkäll4, L. Chulkov12, M. Dierigl7, D. Di Julio4, I. Durán1, E. Fiori10, A. Fomichev11, D. Galaviz9, M. Gascón1, R. Gernhäuser7, J. Gerl5, P. Golubev4, M. Golovkov11, D. González1, A. Gorshkov11, A. Heinz3, M. Heil5, B. Heiss7, W. Henning7, G. Ickert5, A. Ignatov13, B. Jakobsson4, H.T. Johansson3, M. Kmiecik14, Th. Kröll13, R. Krücken ‡ 7, S. Krupko11, F. Kurz7, T. Le Bleis7, B. Löher10, A. Maj14, E. Nacher2, T. Nilsson3, A. Perea2, C. Pfeffer7, N. Pietralla13, B. Pietras1, R. Reifarth6, J. Sanchez del Rio2, D. Savran10, S. Sidorchuk11, H. Simon5, L. Schnorrenberger13, O. Tengblad2, P. Teubig9, R. Thies3, J.A. Vilán8, M. von Schmid13, M. Winkel7, S. Winkler7, F. Wamers13, P. Yañez8, and M. Zieblinski14 1Universidad de Santiago de Compostela; 2Instituto Estructura de la Materia, CSIC Madrid; 3Chalmers University of Technology, Göteborg; 4Lund University; 5Helmholtzzentrum für Schwerionenforschung, Darmstadt; 6Goethe University Frankfurt am Main; 7Technische Universität München; 8Universidad de Vigo; 9Centro de Física Nuclear da Universidade de Lisboa; 10Extreme Matter Institute and Research Division, GSI; 11Joint Institute for Nuclear Research, Dubna; 12Nuclear Reseach Center, Kurchatov Institute Moscow; 13Technische Universität Darmstadt; 14Institute of Nuclear Physics PAN, Krakow, Poland