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Search for New Molybdenum‐Based Crystal Scintillators for the Neutrino‐Less Double Beta Decay Search Experiment
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2019-10-22 , DOI: 10.1002/crat.201900079 HongJoo Kim 1 , Indra Raj Pandey 2 , Arshad Khan 1 , Ju-Kyung Son 2 , Moo Hyun Lee 2 , Yeongduk Kim 2
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2019-10-22 , DOI: 10.1002/crat.201900079 HongJoo Kim 1 , Indra Raj Pandey 2 , Arshad Khan 1 , Ju-Kyung Son 2 , Moo Hyun Lee 2 , Yeongduk Kim 2
Affiliation
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Studies of Li2O–MoO3, Cs2MoO4–MoO3, and Na2O–MoO3 phases have helped us to develop several new crystals such as Li2MoO4, Li4Mo5O17, Li2Mo4O13 Cs2MoO4, Cs2Mo2O7, Cs2Mo3O10 Na2Mo2O7, and Na6Mo11O36 grown by a Czochralski method. Syntheses of the polycrystalline materials are discussed based on the thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) analysis and the crystals’ structures are reported based on the X‐ray powder diffraction (XRD) analysis. Luminescence properties of the crystals from room temperature to 10 K are studied by exciting the crystal with a 280 nm light emitting diode (LED). The scintillation light yields of the crystals at different low temperatures are studied by exciting the crystal with strontium‐90 (90Sr) beta source. The developed crystals are not luminescent at room temperature. At cryogenic temperature, however, they become luminescent with longer decay times. This work also reports on the luminescence and scintillation properties of ZnMoO4, PbMoO4, Pb2MoO5, and CaMoO4 crystals which have been grown at other institutes. The newly developed crystals’ results are compared with the result of a standard CaMoO4 crystal. Among the new Mo‐based crystals, the Na2Mo2O7 crystal shows the most promising properties for the neutrino‐less double beta decay (0νββ) search experiments at cryogenic temperature.
中文翻译：
搜索用于中微子双Beta衰变搜索实验的新型钼基晶体闪烁器
Li 2 O–MoO 3，Cs 2 MoO 4 –MoO 3和Na 2 O–MoO 3相的研究帮助我们开发了几种新晶体，例如Li 2 MoO 4，Li 4 Mo 5 O 17，Li 2 Mo 4 O 13 Cs 2 MoO 4，Cs 2 Mo 2 O 7，Cs 2 Mo 3 O 10 Na 2 Mo 2 O 7，和通过切克劳斯基（Czochralski）法生长的Na 6 Mo 11 O 36。基于热重分析（TGA）和差示扫描量热仪（DSC）分析讨论了多晶材料的合成，并基于X射线粉末衍射（XRD）分析报告了晶体的结构。通过用280 nm发光二极管（LED）激发晶体，研究了晶体从室温到10 K的发光特性。通过用锶90（90（90Sr）Beta来源。显影的晶体在室温下不发光。但是，在低温下，它们会随着较长的衰变时间而发光。这项工作还报告了在其他研究所生长的ZnMoO 4，PbMoO 4，Pb 2 MoO 5和CaMoO 4晶体的发光和闪烁特性。将新开发的晶体的结果与标准CaMoO 4晶体的结果进行比较。在新的基于Mo的晶体中，Na 2 Mo 2 O 7晶体在低温下无中微子双β衰变（0νββ）搜索实验中显示出最有希望的性能。
更新日期：2019-10-22
中文翻译：
搜索用于中微子双Beta衰变搜索实验的新型钼基晶体闪烁器
Li 2 O–MoO 3，Cs 2 MoO 4 –MoO 3和Na 2 O–MoO 3相的研究帮助我们开发了几种新晶体，例如Li 2 MoO 4，Li 4 Mo 5 O 17，Li 2 Mo 4 O 13 Cs 2 MoO 4，Cs 2 Mo 2 O 7，Cs 2 Mo 3 O 10 Na 2 Mo 2 O 7，和通过切克劳斯基（Czochralski）法生长的Na 6 Mo 11 O 36。基于热重分析（TGA）和差示扫描量热仪（DSC）分析讨论了多晶材料的合成，并基于X射线粉末衍射（XRD）分析报告了晶体的结构。通过用280 nm发光二极管（LED）激发晶体，研究了晶体从室温到10 K的发光特性。通过用锶90（90（90Sr）Beta来源。显影的晶体在室温下不发光。但是，在低温下，它们会随着较长的衰变时间而发光。这项工作还报告了在其他研究所生长的ZnMoO 4，PbMoO 4，Pb 2 MoO 5和CaMoO 4晶体的发光和闪烁特性。将新开发的晶体的结果与标准CaMoO 4晶体的结果进行比较。在新的基于Mo的晶体中，Na 2 Mo 2 O 7晶体在低温下无中微子双β衰变（0νββ）搜索实验中显示出最有希望的性能。
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