Application of PbWO4 crystal scintillators in experiment to search for decay of 116Cd

Danevich, F.A.; Georgadze, A. Sh.; Kobychev, V.; Kropivyansky, B. N.; Nagorny, S.S.; Nikolaǐko, A. S.; Poda, D.V.; Tretyak, V. I.; Vyshnevskyi, I. M.; Yurchenko, Sergei; Grinyov, B.V.; Nagornaya, L.L.; Pirogov, E. N.; Ryzhikov, V. D.; Brudanin, V.; Vylov, Ts.; Fedorov, A.; Korzhik, M.; Лобко, А. С.; Missevitch, O.

doi:10.1016/j.nima.2005.09.049

Cited by 46 publications

(22 citation statements)

References 39 publications

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“…The need of increasing the experimental sensitivity to rare α decays lead to the employment of different and new experimental techniques such as ionizing chambers [12], crystal scintillators [13] and liquid scintillators [14].…”

Section: Introductionmentioning

confidence: 99%

New experimental limits on the α decays of lead isotopes

et al. 2013

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For the first time a PbWO4 crystal was grown using ancient Roman lead and it was run as a cryogenic detector. Thanks to the simultaneous and independent read-out of heat and scintillation light, the detector was able to discriminate β/γ interactions with respect to α particles down to low energies. New more stringent limits on the α decays of the lead isotopes are presented. In particular a limit of T 1/2 > 1.4·10 20 y at a 90% C.L. was evaluated for the α decay of 204 Pb to 200 Hg. PACS. 23.60.+e α decay -29.40.Mc Scintillation detectors -07.20.Mc Cryogenics; low-temperature detectors arXiv:1212.2422v2 [nucl-ex]

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Section: Introductionmentioning

confidence: 99%

New experimental limits on the α decays of lead isotopes

et al. 2013

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“…The values a = 3.40, 4.12, and 3.07 were obtained for the CWO-1, CWO-2, and CWO-3 crystals, respectively. Comparable energy resolution with CdWO 4 crystal scintillators were obtained in [25,12,30,32,13].…”

Section: Measurements and Resultsmentioning

confidence: 88%

“…With 1000 kg of 116 CdWO 4 crystals the neutrino mass limit can be pushed down to m ν ∼ 0.02 eV. An alternative solution should also be mentioned for a sensitive 2β decay experiment with 116 CdWO 4 by using lead tungstate crystal scintillators as a high efficiency 4π active shield [13].…”

Section: Introductionmentioning

confidence: 99%

Further study of CdWO4 crystal scintillators as detectors for high sensitivity experiments: Scintillation properties and pulse-shape discrimination

Bardelli

Bini

Bizzeti

et al. 2006

Nuclear Instruments and Methods in Physics Research Section A:

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Energy resolution, light yield, non-proportionality in the scintillation response, α/β ratio, pulse shape for γ rays and α particles were studied with CdWO 4 crystal scintillators. Some indication for a difference in the emission spectra for γ rays and α particles was observed. No dependence of CdWO 4 pulse shape on emission spectrum wavelengths under laser, α particles and γ ray excitation was observed. Dependence of scintillation pulse shape for γ quanta and α particles and pulse-shape discrimination ability on temperature was measured in the range of 0 − 24 • C.

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“…As pointed out by Danevich et al (2004), PbWO 4 is slightly radioactive. The reason is that natural lead (except for so-called "archeological" or "ancient" lead) contains trace amounts of 210 Pb, which is produced naturally in the 238 U decay chain.…”

Section: Scintillators and Reflector Materialsmentioning

confidence: 79%

“…The electron from the 210 Bi β-decay has a maximum energy of Q = 1.16 MeV. The energy of 210 Po α is 5.35 MeV, but the α/β ratio for PbWO 4 is about 0.21 at 5.35 MeV (Danevich 2004). Therefore, the α peak shows up in the spectrum at about 1.2 MeV.…”

Section: Scintillators and Reflector Materialsmentioning

confidence: 99%

Lead Tungstate and Silicon Photomultipliers for Transmission Z-spectroscopy in Cargo Inspection Systems

Langeveld¹,

Janecek²

2015

Physics Procedia

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The bremsstrahlung X-ray spectrum in high-energy, high-intensity X-ray cargo inspection systems is attenuated and modified by cargo materials depending on the cargo atomic number (Z). Spectroscopy of transmitted x rays is thus useful to measure the approximate Z of the cargo. Due to the broad features of the energy spectrum, excellent energy resolution is not required. Such "Z-Spectroscopy" (Z-SPEC) is possible at low enough count rates. A statistical approach, Z-SCAN (Z-determination by Statistical Count-rate ANalysis), can also be used, complementing Z-SPEC at high count rates. Both approaches require fast Xray detectors and fast digitizers. Z-SPEC, in particular, benefits from very fast scintillators, in order to avoid signal pile-up. Preferentially, Z-SPEC, Z-SCAN and cargo imaging are implemented in a single detector array to reduce system cost, weight, and complexity. To preserve good spatial resolution of the imaging subsystem, dense scintillators are required. Previously, we studied ZnO, BaF 2 and PbWO 4 , as well as suitable photo-detectors, read-out electronics and digitizers. ZnO is not suitable because it self-absorbs its scintillation light. BaF 2 emits in the UV, either requiring fast wavelength shifters or UVsensitive solid state read-out devices, and it also has a long decay time component. PbWO 4 is currently the most attractive choice because it does not have these problems, but it is significantly slower and has low light output. There is thus a need for alternative fast high-density scintillators that emit visible light. Alternatively, there is a need for a fast solid-state read-out device that is sensitive to UV light for use with BaF 2 , or other UV-emitting scintillators. Here, we present results of tests performed with PbWO 4 crystals, reflector materials and silicon photomultipliers.

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Application of PbWO4 crystal scintillators in experiment to search for decay of 116Cd

Cited by 46 publications

References 39 publications

New experimental limits on the α decays of lead isotopes

New experimental limits on the α decays of lead isotopes

Further study of CdWO4 crystal scintillators as detectors for high sensitivity experiments: Scintillation properties and pulse-shape discrimination

Lead Tungstate and Silicon Photomultipliers for Transmission Z-spectroscopy in Cargo Inspection Systems

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