Germanium-gated γ–γ fast timing of excited states in fission fragments using the EXILL & FATIMA spectrometer

J.-m. Régis, G.s. Simpson, A. Blanc, G. De France, M. Jentschel, U. Köster, P. Mutti, V. Paziy, N. Saed-samii, T. Soldner, C.a. Ur, W. Urban, A.m. Bruce, F. Drouet, L.m. Fraile, S. Ilieva, J. Jolie, W. Korten, T. Kröll, S. LalkovskiH. Mach, N. Mărginean, G. Pascovici, Zs. Podolyak, P.h. Regan, O.j. Roberts, J.f. Smith, C. Townsley, A. Vancraeyenest, N. Warr

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

A high-granularity mixed spectrometer consisting of high-resolution Ge and very fast LaBr3(Ce)-scintillator detectors has been installed around afission target at the cold-neutron guide PF1B of thehigh-flux reactor of the Institut Laue–Langevin. Lifetimes of excited states in the range of 10 ps to 10 nscan be measured in around 100 exotic neutron-richfission fragments using Ge-gated LaBr3(Ce)–LaBr3(Ce) or Ge–Ge–LaBr3(Ce)–LaBr3(Ce) coincidences. We report on various characteristics of theEXILL&FATIMA spectrometer for the energy range of 40 keV up to 6.8 MeV and present results of ps-lifetime test measurements in afission fragment. The results are discussed with respect to possiblesystematic errors induced by background contributions.
Original languageEnglish
Pages (from-to)210-220
Number of pages11
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume763
Early online date11 Jun 2014
DOIs
Publication statusPublished - 1 Nov 2014

Keywords

  • fast-timing arrays
  • LaBr3(Ce) scintillators
  • Lifetime measurements
  • the GCD method
  • Neutron capture gamma rays
  • Neutron induced fission

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