A LaBr3: Ce fast-timing array for DESPEC at FAIR

Abstract

The design of a fast-timing γ-ray detection array aimed at measuring sub-nanosecond half-lives using LaBr 3 :Ce scintillation crystals is presented. This array will complement novel and existing charged particle and neutron detector arrays at the low-energy branch of a fragment separator (Super-FRS), to be built within the NuSTAR collaboration as part of the future Facility for Anti-proton and Ion Research (FAIR). The array will be used in conjunction with the Advanced Implantation Detector Array (AIDA), to measure implant-decay correlations. Monte-Carlo simulations have been performed to determine the design of the proposed fast-timing array around a localised implantation point. In particular, simulations were used to determine the full-energy peak efficiencies for single cylindrical, conical and 'hybrid' detector geometries, as well as complete array configurations of 'hybrid' and ø1.5"x2" cylindrical crystals. Timing precision calculations were then used to determine the timing response for each configuration based on its simulated efficiency. An informed decision based on the simulated efficiencies and timing precision calculations allowed the optimum configuration for the array to be determined.

Perturbed angular distributions withLaBr3detectors: Thegfactor of the first10+state inCdGray1, Stuchbery2, Reed3 et al. 2017Phys. Rev. C63151View full textAdd to dashboardCite

“…LaBr 3 detectors have excellent time resolution (∼300 ps is readily achievable [3][4][5][6][7][8][9][10]), and energy resolution much superior to other commonly used scintillators such as NaI and BaF 2 , making them an excellent choice for fast in-beam time differential perturbed angular distribution (TDPAD) measurements [11]. Thus the new opportunities for application of LaBr 3 detectors include the measurement of g factors of shorter-lived nuclear states in known, intense, static hyperfine magnetic fields in magnetic hosts, satisfying the condition τ T L = π/ω L , where τ is the nuclear mean life, and T L (ω L ) is the Larmor period (frequency) [12].…”

Advances in the Direct Study of Carbon Burning in Massive Stars

“…Charged particles are detected in three annular silicon strip detectors covering 30% of the 4π solid angle. For gamma-ray detection, STELLA employs an array of 36 lanthanum bromide [LaBr 3 ðCeÞ] scintillator detectors from the UK FATIMA Collaboration [30,31], which have high energy resolution (≈3% at 662 keV). The subnanosecond timing of these detectors allows tight time coincidences with charged particles for background reduction as demonstrated in Fig.…”

Fast-timing measurements in the ground-state band of Pd114

“…The experimental setup combined the Gammasphere [28] and FATIMA [29] arrays at the Argonne National Laboratory (USA). This was the first time that Gammasphere was coupled to such a large number of LaBr 3 (Ce) scintillator detectors using a fully digital acquisition setup.…”