Simulation of light collection in calcium tungstate scintillation detectors

Danevich, F.A.; Kobychev, V.; Kobychev, R.V.; Kraus, H.; Mikhailik, V.; Mokina, V.M.

doi:10.15407/jnpae2015.04.329

Cited by 3 publications

(7 citation statements)

References 10 publications

(6 reference statements)

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“…The high accuracy of the experiment was achieved thanks to the deeper experimental site, the better discrimination capability between the photomultiplier noise and the scintillation events, the larger exposure, and the lower level of background. In addition, in the experiment [193] the energy resolution was slightly better than that in the Solotvina experiment [242]. A summary of the experiments for the β decay of 113 Cd is given in Table 10.…”

Section: CD β Decaymentioning

confidence: 91%

“…[240,241]. Further improvement of the accuracy was achieved with a CdWO 4 crystal scintillator at the Solotvina underground laboratory [242] and in the experiment [243] with a CdZnTe detector.…”

Section: CD β Decaymentioning

confidence: 99%

“…The most accurate measurement of the 113 Cd β decay was realized in the experiment [193] at the LNGS underground laboratory by using the same CdWO 4 crystal scintillator as in Ref. [242] (to minimize its cosmogenic activation, the crystal has been stored underground at the Solotvina laboratory after the experiment [242], and then was transported in a thick-wall iron container to the LNGS laboratory). The shape of the spectrum was precisely measured, and the half-life of 113 Cd was determined as T 1/2 = (8.04±0.05)×10 15 yr [193].…”

Section: CD β Decaymentioning

confidence: 99%

“…-the cluster decays, where a nuclide decays by emitting nuclides heavier than α particle (from 14 C to 34 Si); about 40 nuclides from 221 Fr to 242 Cm can decay in such a way to isotopes close to 208 Pb ("lead radioactivity") with partial half-lives in the range 10 3 − 10 20 yr [1,2]. The cluster decay was theoretically predicted in 1980 [3] and experimentally observed for the first time in 1984 [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Experimental searches for rare alpha and beta decays

et al. 2019

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The current status of the experimental searches for rare alpha and beta decays is reviewed. Several interesting observations of alpha and beta decays, previously unseen due to their large half-lives (10 15 − 10 20 yr), have been achieved during the last years thanks to the improvements in the experimental techniques and to the underground locations of experiments that allows to suppress backgrounds. In particular, the list includes first observations of alpha decays of 151 Eu, 180 W (both to the ground state of the daughter nuclei), 190 Pt (to excited state of the daughter nucleus), 209 Bi (to the ground and excited states of the daughter nucleus). The isotope 209 Bi has the longest known half-life of T 1/2 ≈ 10 19 yr relatively to alpha decay. The beta decay of 115 In to the first excited state of 115 Sn (Eexc = 497.334 keV), recently observed for the first time, has the Q β value of only (147 ± 10) eV, which is the lowest Q β value known to-date. Searches and investigations of other rare alpha and beta decays ( 48 Ca, 50 V, 96 Zr, 113 Cd, 123 Te, 178m2 Hf, 180m Ta and others) are also discussed.

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Section: CD β Decaymentioning

confidence: 91%

Section: CD β Decaymentioning

confidence: 99%

Section: CD β Decaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental searches for rare alpha and beta decays

et al. 2019

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“…In 2013, the dependence of scintillation yields on the incident direction of α particles was reported in ZnWO 4 crystal, which is an inorganic scintillator containing heavy nuclei [6,7]. In this paper, we evaluated the anisotropic scintillation response of a ZnWO 4 crystal by nuclear recoil using neutrons to examine its performance as a direction-sensitive dark matter detector.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic response measurements of ZnWO4 scintillators to neutrons for developing a direction-sensitive dark matter detector

Pedersen

Sekiya

Ichimura

2020

Progress of Theoretical and Experimental Physics

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The scintillation yields of ZnWO$_4$ crystals change depending on the incident direction of particles. This property can be used as a direction-sensitive dark matter detector, so we investigated the ZnWO$_4$ light yields ratio of neutron-induced nuclear recoils to gamma-ray-induced electron recoils (quenching factor). Two surfaces almost perpendicular to the crystal axis of ZnWO$_4$ were irradiated with a quasi-monochromatic neutron beam of 0.885 MeV, and the quenching factors of both surfaces for the oxygen-nucleus recoil in the ZnWO$_4$ crystal were measured. The obtained quenching factors of the two surfaces were $0.235 \pm 0.026$ and $0.199 \pm 0.020$, respectively, confirming 15.3% anisotropy.

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Particle discrimination in TeO 2 bolometers using light detectors read out by transition edge sensors

Schäffner

Angloher

Bellini

et al. 2015

Astroparticle Physics

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An active discrimination of the dominant α-background is the prerequisite for future neutrinoless double-beta decay experiments based on TeO2 bolometers. We investigate such α-particle rejection in cryogenic TeO2 bolometers by the detection of Cherenkov light. For a setup consisting of a massive TeO2 crystal (285 g) and a separate cryogenic light detector, both using transition edge sensors as temperature sensors operated at around 10 mK, we obtain an event-by-event identification of e/γand α-events. We find in the energy interval ranging from 2400 keV to 2800 keV and covering the Qvalue of the neutrinoless double-beta decay of 130 Te a separation of the means of the two populations of 3.7 times their width.

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Simulation of light collection in calcium tungstate scintillation detectors

Cited by 3 publications

References 10 publications

Experimental searches for rare alpha and beta decays

Experimental searches for rare alpha and beta decays

Anisotropic response measurements of ZnWO4 scintillators to neutrons for developing a direction-sensitive dark matter detector

Particle discrimination in TeO 2 bolometers using light detectors read out by transition edge sensors

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