To testify thermal stability of the BNCT neutron target synthesized by
in-situ lithium deposition and ion implantation, laser heating test of the Li
3N/Li/Cu tri-layered target was conducted in high vacuum chamber of 10
−6 Pa and thermal stability of the tri-layered target was characterized by X-ray photoelectron spectroscopy. Following conclusions were derived; (1) The Li
3N/Li/Cu tri-layered target with very low oxide and carbon contamination was synthesized by
in-situ lithium deposition and ion implantation techniques without H
2O and O
2 additions, (2) The starting temperature of evaporation of the Li
3N/Li/Cu tri-layered target increased by 120 K compared to that of the Li/Cu target, and (3) Frequent repair synthesis of the damaged Li
3N/Li/Cu tri-layered target caused by evaporation is possible.
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