Target unit with ceramic capsule for producing cu-67 radioisotope

Patent metadata

Field	Value
Publication number	US-11049628-B2
Application number	US-201816166441-A
Country	US
Kind code	B2
Filing date	Oct 22, 2018
Priority date	Sep 29, 2011
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A target unit for producing Cu67 radioisotope is described herein, and comprises a cage body releasably coupled to a screw-on cap; and a ceramic capsule containing a solid Zn68 target ingot and having one open end and one closed end and defining an interior chamber for the target ingot. The ceramic capsule is releasably contained between the cage body and the screw-on cap with a lid disposed on the open end of the capsule and a washer positioned between the lid and the screw-on cap. The screw-on cap and the washer provide a water-tight seal between the lid and the capsule. The interior of the capsule is in intimate physical contact with the target ingot; and the Zn68 of the target ingot is free of traces of residual oxygen that interfere with contact of the Zn68 to the capsule.

First claim

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A target unit for producing Cu67 radioisotope comprising:
a cage body releasably coupled to a screw-on cap; and
a ceramic capsule containing a solid Zn68 target ingot and having one open end and one closed end and defining an interior chamber for the target ingot;
wherein the ceramic capsule is releasably contained between the cage body and the screw-on cap with a lid disposed on the open end of the capsule and a washer positioned between the lid and the screw-on cap, wherein the screw-on cap and the washer provide a water-tight seal between the lid and the capsule; the interior of the ceramic capsule is in intimate physical contact with the solid Zn68 target ingot; and the Zn68 of the target ingot is free of traces of residual oxygen that interfere with contact of the Zn68 to the capsule.

2. The target unit of claim 1 , wherein the cage body and the screw-on cap are composed of aluminum.

3. The target unit of claim 1 , wherein the cage body and the screw-on cap are composed of different alloys of aluminum to minimize the possibility of thread galling.

4. The target unit of claim 1 , wherein the cage body and the screw-on cap are each composed of different alloys of aluminum selected from the group consisting of 6061 Al and 2024 Al.

5. The target unit of claim 1 , wherein the cage body includes apertures to allow cooling water to contact the capsule during irradiation thereof to prevent melting or partial melting of the zinc target ingot during the irradiation.

6. The target unit of claim 1 , wherein the ceramic capsule is composed of a material selected from the group consisting of alumina and aluminum nitride.

7. The target unit of claim 1 , wherein the capsule is composed of alumina.

8. A target unit for producing Cu67 radioisotope comprising:
a cylindrical cage body with a threaded open end;
a screw-on cap threaded to mate with the threaded open end of the cage body;
a ceramic capsule having one open end and one closed end, and defining an interior chamber containing a Zn68 target ingot in intimate physical contact with the capsule;
a removable lid covering the open end of the capsule; and
a gasket disposed between the open end of the capsule and the lid;
wherein the ceramic capsule, the lid, and the gasket are arranged within the interior cavity of the cage body with the lid in contact with the screw-on cap when the cage body is mated with the screw-on cap, so that the screw-on cap applies a pressure on the lid and gasket sufficient to form a water-tight seal over the open end of the capsule when the unit is fully assembled for use; and the Zn68 of the target ingot is free of traces of residual oxygen that interfere with contact of the Zn68 to the capsule.

9. The target unit of claim 8 , wherein the cage body and the screw-on cap are composed of aluminum.

10. The target unit of claim 8 , wherein the cage body and the screw-on cap are composed of different alloys of aluminum to minimize the possibility of thread galling.

11. The target unit of claim 8 , wherein the cage body and the screw-on cap are each composed of different alloys of aluminum selected from the group consisting of 6061 Al and 2024 Al.

12. The target unit of claim 8 , wherein the cage body includes apertures to allow cooling water to contact the capsule during irradiation thereof to prevent melting or partial melting of the zinc target ingot during the irradiation.

13. The target unit of claim 8 , wherein the ceramic capsule is composed of a material selected from the group consisting of alumina and aluminum nitride.

14. The target unit of claim 8 , wherein the capsule is composed of alumina.

15. The target unit of claim 8 wherein the gasket is composed of graphite.

Assignees

• Uchicago Argonne Llc

Inventors

• Ehst David A
• Willit James L

Classifications

• G21G2001/0094

  Other isotopes not provided for in the groups listed above · CPC title

• B01D7/00

  Sublimation (B01D8/00 takes precedence; freeze-drying F26) · CPC title

• G21K5/08 Primary

  Holders for targets or for other objects to be irradiated · CPC title

• G21G1/12

  by electromagnetic irradiation, e.g. with gamma or X-rays (applications of radiation G21H5/00; irradiation devices G21K5/00) · CPC title

• H05H6/00

  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