Charged particles identification with a CsI(Tl) scintillator

Alarja, J.; Dauchy, A.; Giorni, A.; Morand, C.; Pollaco, E.; Stassi, P.; Billerey, R.; Chambon, B.; Cheynis, B.; Drain, D.; Pastor, C.

doi:10.1016/0168-9002(86)90232-9

Cited by 100 publications

(20 citation statements)

References 6 publications

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“…Heavily ionizing events due to α-particles and nuclear recoils have faster decays than those from e/γ's − opposite to the response in liquid scintillator [12]. This characteristic property makes particle identification possible with this scintillator [13].…”

Section: Pulse Shape Discriminationmentioning

confidence: 99%

Near threshold pulse shape discrimination techniques in scintillating CsI(Tl) crystals

Yue

Lai

et al. 2004

Nuclear Instruments and Methods in Physics Research Section A:

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There are recent interests with CsI(Tl) scintillating crystals for Dark Matter experiments. The key merit is the capability to differentiate nuclear recoil (nr) signatures from the background β/γ-events due to ambient radioactivity on the basis of their different pulse shapes. One of the major experimental challenges is to perform such pulse shape analysis in the statistics-limited domain where the light output is close to the detection threshold. Using data derived from measurements with low energy γ's and nuclear recoils due to neutron elastic scatterings, it was verified that the pulse shapes between β/γ-events are different. Several methods of pulse shape discrimination are studied, and their relative merits are compared. Full digitization of the pulse shapes is crucial to achieve good discrimination. Advanced software techniques with mean time, neural network and likelihood ratios give rise to satisfactory performance, and are superior to the conventional Double Charge method commonly applied at higher energies. Pulse shape discrimination becomes effective starting at a light yield of about 20 photo-electrons. This corresponds to a detection threshold of about 5 keV electron-equivalence energy, or 40−50 keV recoil kinetic energy, in realistic experiments.

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Section: Pulse Shape Discriminationmentioning

confidence: 99%

Near threshold pulse shape discrimination techniques in scintillating CsI(Tl) crystals

Yue

Lai

et al. 2004

Nuclear Instruments and Methods in Physics Research Section A:

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“…The average pulse shapes for both categories are depicted in Figures 3, where t=0 is defined by the trigger instant. This characteristic property makes particle identification possible with this scintillator [22].…”

Section: Pulse Shape Discrimination In Csi(tl) Crystalsmentioning

confidence: 98%

Measurement of the intrinsic radiopurity of 137Cs/235U/238U/232Th in CsI(Tl) crystal scintillators

Zhu¹,

Lin²,

Singh³

et al. 2006

Nuclear Instruments and Methods in Physics Research Section A:

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The inorganic crystal scintillator CsI(Tl) has been used for low energy neutrino and Dark Matter experiments, where the intrinsic radiopurity is an issue of major importance. Low-background data were taken with a CsI(Tl) crystal array at the Kuo-Sheng Reactor Neutrino Laboratory. The pulse shape discrimination capabilities of the crystal, as well as the temporal and spatial correlations of the events, provide powerful means of measuring the intrinsic radiopurity of 137 Cs as well as the 235 U, 238 U and 232 Th series. The event selection algorithms are described, with which the decay half-lives of 218 Po, 214 Po, 220 Rn, 216 Po and 212 Po were derived. The measurements of the contamination levels, their concentration gradients with the crystal growth axis, and the uniformity among different crystal samples, are reported. The radiopurity in the 238 U and 232 Th series are comparable to those of the best reported in other crystal scintillators. Significant improvements in measurement sensitivities were achieved, similar to those from dedicated massive liquid scintillator detector. This analysis also provides in situ measurements of the detector performance parameters, such as spatial resolution, quenching factors, and data acquisition dead time.

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“…6, has a clear peak indicating the detection of tritons, which is the signature of a neutron capture in the converter. Unfortunately the alpha peak is hidden inside the exponential gamma contribution, due to the lower light yield for heavier particles, intrinsic of the scintillators [12]. By building a 3D spectrum having the 02002-p.4 left and right light output from the strip on the X and Y axis, under the condition that the total light were under the triton peak, one can immediately see the effect of the neutron converter strips placed on the scintillator (Fig.…”

Section: Scintillators For Neutron Detectionmentioning

confidence: 99%

HELNED: Helium-3-free low-cost neutron detectors

Barbagallo

Coséntino

Marchetta

et al. 2014

EPJ Web of Conferences

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Abstract. We developed a technique for thermal neutron detection not making use of 3 He, also suitable for online real time monitoring of CASTOR spent fuel containers. As a neutron converter we used 6 LiF, being the neutron capture cross section of 6 Li very well known and with only an alpha and a triton in the exit channel. We can deposit thin layers of converter onto several different substrates, to be placed on top of solid state detectors or scintillators capable of efficiently detecting the decay products.

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Charged particles identification with a CsI(Tl) scintillator

Cited by 100 publications

References 6 publications

Near threshold pulse shape discrimination techniques in scintillating CsI(Tl) crystals

Near threshold pulse shape discrimination techniques in scintillating CsI(Tl) crystals

Measurement of the intrinsic radiopurity of 137Cs/235U/238U/232Th in CsI(Tl) crystal scintillators

HELNED: Helium-3-free low-cost neutron detectors

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