Linearity of the energy scale of a detector based on a LaBr3(Ce) scintillator

Trofimov, Yu. A.; Lupar, E. E.; Yurov, V. N.

doi:10.1134/s0020441213010314

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…A high-purity germanium (HPGe) Clover detector of Canberra was placed directly facing to the LaBr 3 (Ce). The high voltage applied for the LaBr 3 (Ce) detector was set to be 520 V. Higher voltage may cause the electron saturation in the photomultiplier, thus can affect linearity [23] in the energy determination. The Clover consists of four coaxial N-type high-purity Germanium detectors, each with a diameter of 60 mm and length of 60 mm.…”

Section: Methodsmentioning

confidence: 99%

Intrinsic radiation background of LaBr$_3$(Ce) detector via coincidence measurements and simulations

Cheng,

Sun,

Zhu

et al. 2020

Preprint

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The LaBr3(Ce) detector has attracted much attention in recent years for its superior characteristics to other scintillating materials in terms of resolution and efficiency. However, it has relatively high intrinsic radiation background due to the naturally occurring radioisotope in lanthanum, actinium and their daughter nuclei. This limits its applications in low counting rate experiments. In this paper, we identified the radioactive isotopes in the φ3 ′′ ×3 ′′ Saint-Gobain B380 detector by a coincidence measurement using a Clover detector in a low-background shielding system. Moreover, we carried out a Geant4 simulation to the experimental spectra to evaluate the activities of the main internal radiation components. The activity of radiation background of B380 is determined to be 1.480 (69) Bq/cm 3 , the main sources of which include 138 La of 1.425 (59) Bq/cm 3 , 211 Bi of 0.0136 (15) Bq/cm 3 , 219 Rn of 0.0125 (17) Bq/cm 3 , 223 Ra of 0.0127 (14) Bq/cm 3 , and 227 Th of 0.0158 (22) Bq/cm 3 .

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Section: Methodsmentioning

confidence: 99%

Intrinsic radiation background of LaBr$_3$(Ce) detector via coincidence measurements and simulations

Cheng,

Sun,

Zhu

et al. 2020

Preprint

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“…Gamma-lines are produced by radio isotopes ( 137 Cs, 60 Co, Pu-Be) and neutron interactions on hydrogen (2.2 MeV line), iron (7.6 MeV line) and nitrogen (10.8 MeV line) were used for the LES prototype calibration (Trofimov et al, 2013). The HES prototype was calibrated by LED pulser which is similar to one described in Vicic et al (2003).…”

Section: Investigation Tests Of the Gris Detector Prototypesmentioning

confidence: 99%

Solar gamma-ray spectrometer GRIS onboard the International Space Station

Yurov

Trofimov

Lupar

et al. 2015

Advances in Space Research

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“…Therefore, the signal peak-to-charge ratio V p /Q total determined uniquely in all waveforms was noted in this work. Generally, Q total is proportional to V p and for gamma ray events at adequate gamma ray energy region, 23,24 while the V p /Q total value is expected to be a constant. However, we observed different values between alpha and gamma induced events.…”

Section: Introductionmentioning

confidence: 99%

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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Linearity of the energy scale of a detector based on a LaBr3(Ce) scintillator

Abstract: The linearity of a LaBr 3 (Ce) detector response in the energy range of 0.6-11.0 MeV has been investigated using various PMT voltage divider circuits. A tapered voltage divider circuit is proposed to reduce the nonlinearity.

Cited by 4 publications

References 10 publications

Intrinsic radiation background of LaBr$_3$(Ce) detector via coincidence measurements and simulations

Intrinsic radiation background of LaBr$_3$(Ce) detector via coincidence measurements and simulations

Solar gamma-ray spectrometer GRIS onboard the International Space Station

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

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