Fast timing study of a CeBr3 crystal: Time resolution below 120ps at 60Co energies

Fraile, L. M.; Mach, H.; Vedia, V.; Olaizola, B.; Paziy, V.; Picado, E.; Udı́as, J. M.

doi:10.1016/j.nima.2012.11.009

Cited by 49 publications

(34 citation statements)

References 15 publications

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“…At RIKEN, the half-life of 30 the yrast 2 + state in 104 Zr has been re-measured using βγ coincidences with the β-timing 31 coming from fast plastic scintillators at the front and back of the WAS3ABi (Wide-range…”

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confidence: 99%

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

Roberts

Bruce

Regan

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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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.

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confidence: 99%

“…Traditionally, BaF 2 crystals were used for timing due to their fast 51 response, however they have poor energy resolution (∆E/E ∼ 9 % at 662 keV [31,32] between the two was reached.…”

mentioning

confidence: 99%

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

Roberts

Bruce

Regan

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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“…15,16 In recent years, CeBr 3 scintillators with high energy resolution (4.0% at 662 keV) and fast timing resolution of 119 ps with a self-activity much lower than the LaBr 3 :Ce scintillator have also been developed. [17][18][19] However, the characteristics of CeBr 3 scintillators are slightly inferior to LaBr 3 :Ce scintillators at present. Yet, self-activity of LaBr 3 :Ce crystals is considered to be a serious defect in LaBr 3 :Ce scintillators.…”

Section: Introductionmentioning

confidence: 89%

Feasibility study on signal separation for spontaneous alpha decay in LaBr3: Ce scintillator by signal peak-to-charge discrimination

Ogawara

Ishikawa

2015

Review of Scientific Instruments

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A novel analysis method named peak-to-charge ratio (Vp/Qtotal) discrimination, aiming at background rejection especially for alpha decay self-activity in LaBr3: Ce scintillators has been developed. This method is based on a waveform analysis using the peak-to-charge ratio in the output waveform of a photomultiplier tube. The discrimination of alpha-induced events was achieved by using a threshold function based on the error propagation of the Vp/Qtotal value. The accidental rejection ratio of gamma-induced events was evaluated to be 0.17%. Furthermore, a total absorption peak spectrum processed with the Vp/Qtotal discrimination method for 68Ga 1.883 MeV gamma rays, where the energy was overlapped with background alpha events, reproduced exactly the same result as that of the background subtraction method. The difference in measured peak counts of both methods was 0.716%, and the statistical error in the Vp/Qtotal discrimination method and background subtraction was 4.81% and 8.70%, respectively. Thus a higher-accuracy measurement could be achieved using the Vp/Qtotal discrimination method. The present study demonstrates that the Vp/Qtotal discrimination method is a promising method for background rejection of the spontaneous alpha decay in LaBr3: Ce scintillators.

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“…The energy resolution for the 661.7 keV 137 Cs line is 9.0% for the best crystals and about 10.0% for most of them. In spite of the steady development of inorganic scintillators for γ detection, BaF 2 is still the fastest commercially produced crystal with time resolution of ∼80 ps FWHM for small ∼1-2 cm 3 crystals [9] and 150 ps FWHM for crystals of our Studsvik design at 60 Co energies.…”

Section: Scintillation Crystalsmentioning

confidence: 99%

“…We have performed a detailed study of this type of crystal to assess whether it is a viable alternative to LaBr 3 (Ce) [9]. The time response of a CeBr 3 crystal of 1 in.…”

Section: Scintillation Crystalsmentioning

confidence: 99%

Fast-timing spectroscopy at ISOLDE

Fraile

2017

J. Phys. G: Nucl. Part. Phys.

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View the article online for updates and enhancements. Related contentNuclear-structure studies of exotic nuclei with MINIBALL P A Butler, J Cederkall and P Reiter AbstractThe advanced time-delayed bgg(t) method has been used at ISOLDE since the relocation of the facility from the synchrocyclotron to the CERN proton synchrotron booster, a quarter of a century ago. The method was designed for precision measurements with low-intensity beams, achieving good efficiency and excellent time resolution with a compact setup. Over this time the technique has evolved to cope with the challenge of measuring lifetimes of complex level schemes of increasingly exotic nuclei populated in β decay. The ISOLDE facility provides unsurpassed opportunities to study many regions of the nuclide chart. The physics case encompasses topics of interest across the nuclide chart, including the evolution of shell structure around neutron shell and subshell closures such as N=20, N=40 and N=50, shape coexistence, and octupole correlations in heavy nuclei. The recently commissioned ISOLDE decay station provides enhanced capabilities that will be fully exploited with the increased beam intensities available at the upcoming HIE-ISOLDE facility.

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Fast timing study of a CeBr3 crystal: Time resolution below 120ps at 60Co energies

Cited by 49 publications

References 15 publications

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

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

Feasibility study on signal separation for spontaneous alpha decay in LaBr3: Ce scintillator by signal peak-to-charge discrimination

Fast-timing spectroscopy at ISOLDE

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