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Registration Number

0215U003028, 0113U005119 , R & D reports

Title

Cryogenic detector to search for neutrinoless double beta decay of molybdenum

Head

Danevich Feodor,

Registration Date

15-01-2015

Organization

Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine

Description

Zinc molybdate (ZnMoO4) crystals with mass up to 1 kg of high optical quality with low levels of radioactive contamination were developed and tested (including at temperatures of 15-30 mK). The improved quality of the detectors has been achieved thanks to a new method of molybdenum purification and application of low-thermal-gradient Czochralski method to grow the crystals. For the first time the refractive index and the Debye temperature were measured with high precision. It is shown that the developed crystals are very promising material for scintillation bolometers to study neutrinoless double beta decay of isotope 100-Mo in the case of inverted neutrino mass hierarchy, and allow to develop a large-scale experiment to test the hierarchy of neutrino mass in a case of normal mass scheme.

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Бойко Роман Сергійович
Даневич Федір Анатолійович
Кобичев Владислав Валерійович
Мокіна Валентина Михайлівна
Пода Денис Валентинович
Поліщук Оксана Григорівна, к.ф.-м.н.
Третяк Володимир Ілліч
Черняк Дмитро Миколайович