Na2Mo2O7 scintillating crystals: Growth, morphology and optical properties

The Structural, Lattice Dynamic, Thermodynamic, and Mechanical Characterization of Na2Mo2O7 Crystal by First‐Principles

“…The bandgap estimated from absorption spectra for Na 2 Mo 2 O 7 plate 100 μm thick is about 3.687 and 3.77 eV at 300 and 80 K, respectively. [ 8 ] Compared with this estimation, the present calculation bandgap, = 2.87 eV, is reasonable. It is known from previous studies [ 33 ] that the bandgap calculated by DFT is generally smaller than the experimental value.…”

“…The present calculation results are in good agreement with the available observed vibrational data. [ 8,36,37 ] . Some phonon frequency and LO‐TO splitting in different directions for the title compound are predicted for the first time, these results are expected to provide more references for further research on this material in the future.…”

“…[6,7] So, this is the reason why researchers are very interested in it. Until now, researchers had explored some of its properties including optical, scintillation, and luminescence properties as well as thermodynamic properties at high temperature, however, there are few data on heat capacity below 53 K theoretically and experimentally, and most of the data are between 53 and 296 K. [8][9][10][11][12] However, for special applications, it is of great significance to study the heat capacity in a wide temperature range, especially below 53 K, namely, the lowtemperature heat capacity data obtained in the experiment are beneficial to determine the thermodynamic function (entropy, enthalpy, etc. ), and obtain the phase transition information and the nature of the interaction between atoms, and calculate the phonon state density and determine the zero-point energy.…”

Na-based crystal scintillators for next-generation rare event searches

“…Standard market 4N purity grade Na 2 CO 3 and WO 3 powders were used as starting materials for the growth of Na 2 W 2 O 7 as described in details in [27]. A high optical quality, colorless Na 2 Mo 2 O 7 single crystal was obtained [30] and is presented in Fig. 1…”

Правило Урбаха И Оценка Ширины Запрещенной Зоны В Молибдатах

“…Проблема наличия радиоактивных изотопов характерна и для других катионов в молибдатах, например свинца, стронция, кадмия. Молибдаты с легкими катионами (Li, Na, Mg) лишены этого недостатка, однако молибдаты лития и магния характеризуются низкими значениями светового выхода, а монокристаллы молибдатов натрия и лития достаточно сложны в обработке [10][11][12][13]. Таким образом, проблема выбора наиболее подходящего кристалла до сих пор остается актуальной.…”