Liquid deposition of salts for impact target preparation

The method addresses salt creep in metal salt deposit preparation by using a target aqueous solution with C2-C4 polyols and hydrophobic coatings, achieving a dense and uniform target layer for improved irradiation efficiency and safety.

JP2026519818APending Publication Date: 2026-06-18NORTHSTAR MEDICAL TECH LLC
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Patent Information

Application Number
JP2025571205
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-07
Filing Date
2024-06-07
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing methods for preparing metal salt deposits for nuclear transmutation targets, such as radium, suffer from salt creep during the drying process, leading to reduced effectiveness and safety issues due to the use of flammable solvents like ethanol, propanol, and acetone, which scatter the target material and reduce irradiation efficiency.

Method used

A method involving the use of a target aqueous solution containing a dissolved metal salt at specific concentrations and C2-C4 polyols, along with controlled heating and hydrophobic coatings, to mitigate salt creep and ensure the target material remains at the bottom of the capsule.

Benefits of technology

The method effectively suppresses salt creep, ensuring a dense and uniform target layer, enhancing irradiation efficiency and safety by maintaining the target material in place.

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Abstract

A target for heavy ion or electron bombardment is intended, and a method for preparing it is also intended. In this method, a) a liquid target aqueous solution of a target metal salt dissolved in water is deposited at the bottom of a metal target capsule having an opening at the top, and b) the capsule is heated to form a crystalline material. Steps a) and b) are repeated until the crystalline material contains a target amount of the target salt. The target capsule is then heated until the mass of the target capsule remains constant. To mitigate the formation of salt creep during preparation, the liquid target aqueous solution may contain about 2 to about 20 percent v / v of C2-C4 polyol, or the inner surface of the target capsule may be coated with a hydrophobic film that gives a water contact angle of about 70 to about 130° prior to liquid deposition.
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