Abstract: A radioactive isotope liquid targeting apparatus having a functional thermosiphon internal flow channel according to the present invention includes a cavity member having a cavity for accommodating a concentrate for a nuclear reaction. The cavity member includes: a front thin film having a front opening and a rear opening; a front cooling member which is coupled to the cavity member; a thermosiphon induction member which is connected to the rear opening and which has a thermosiphon flow channel connected to the cavity so as to enable the concentrate accommodated in the cavity to flow by means of a thermosiphon phenomenon; and a rear cooling member which is coupled to the rear surface of the thermosiphon induction member and which has a cooling water supply space.

Abstract: A target apparatus for producing a radioisotope having improved cooling performance including a cavity member including a cavity accommodating H218O concentrate and producing 18F through a nuclear reaction between the H218O concentrate and protons irradiated onto the H218O concentrate, wherein the cavity member includes a front aperture and a rear aperture disposed in opposite directions on a path in which the protons are irradiated and connected to the cavity so that the cavity has openings. wherein a thermo-chemically stable layer plated with titanium or niobium is formed in an inner circumference of the cavity.