Target for neutron generation

Patent metadata

Field	Value
Publication number	US-2016270202-A1
Application number	US-201415035508-A
Country	US
Kind code	A1
Filing date	Nov 10, 2014
Priority date	Nov 12, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

The present invention is a target for neutron generation, including a substrate coated with a palladium layer and a lithium layer such that a surface of the lithium layer is irradiated with charged particles to generate neutrons, and further including, between the palladium layer and the lithium layer, a barrier layer made of a metal that does not form a eutectic alloy with either palladium or lithium. As constituent metals for the barrier layer, specifically, copper, iron, nickel, cobalt, titanium, and zirconium are preferable. The target for neutron generation of the present invention does not degrade in performance even through long-term operation, and can also prevent lithium layer separation.

First claim

1 . A target for neutron generation, comprising a substrate coated with a palladium layer and a lithium layer such that a surface of the lithium layer is irradiated with charged particles to generate neutrons,
the target for neutron generation further comprising, between the palladium layer and the lithium layer, a barrier layer made of a metal that does not form a eutectic alloy with either palladium or lithium.

2 . The target for neutron generation according to claim 1 , wherein the barrier layer is made of a metal selected from copper, iron, nickel, cobalt, titanium, and zirconium or an alloy containing any of these metals.

3 . The target for neutron generation according to claim 1 , wherein the barrier layer has a thickness of 0.5 to 5 μm.

4 . A structure to be used for the target for neutron generation defined in claim 1 ,
the structure comprising a substrate, a palladium layer formed on the substrate, and a barrier layer formed on the palladium layer and made of a metal that does not form a eutectic alloy with either palladium or lithium.

5 . The target for neutron generation according to claim 2 , wherein the barrier layer has a thickness of 0.5 to 5 μm.

6 . A structure to be used for the target for neutron generation defined in claim 2 ,
the structure comprising a substrate, a palladium layer formed on the substrate, and a barrier layer formed on the palladium layer and made of a metal that does not form a eutectic alloy with either palladium or lithium.

7 . A structure to be used for the target for neutron generation defined in claim 3 ,
the structure comprising a substrate, a palladium layer formed on the substrate, and a barrier layer formed on the palladium layer and made of a metal that does not form a eutectic alloy with either palladium or lithium.

Assignees

• Tanaka Precious Metal Ind
• Cancer Intelligence Care Sys Inc

Inventors

• Shioda Shigeo
• Nakamura Masaru

Classifications

• H05H6/00 Primary

  Targets for producing nuclear reactions (supports for targets or objects to be irradiated G21K5/08 {; preparation of tritium C01B4/00; targets, e.g. pellets for fusion reactions by laser or charged particles beam injection H05H1/22}) · CPC title

• A61N2005/109

  Neutrons · CPC title

• A61N5/10

  X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy (A61N5/01 takes precedence) · CPC title

• H05H2277/10

  Medical devices · CPC title