The effects of deuteration-levels in solution and temperature on the segregation coefficient of the deuterium content in rapid-grown K(DxH1−x)2PO4 crystals via Raman spectroscopy

A series of K(DxH1−x)2PO4 (DKDP) crystals with different saturating temperature and deuteration levels were grown via the point-seed rapid growth method. The correlation between the deuterium segregation coefficient and temperature, and deuterium content in a solution was studied via Raman spectroscopy. The intensity of the Raman peak has no obvious linear correlation with the deuterium content or growth temperature of the crystals. A low growth temperature at a lower deuterium content of a solution (30%) or a high temperature at a higher deuterium content of a solution (70%) both can achieve smaller gaps (10.47% and 14.62%, respectively) of the deuteration content between the DKDP crystals and solution. Our results evidence that the segregation coefficient of the deuterium of the point-seed rapid growth method depends on the deuterium content in the solution and temperature.