Method of producing molybdenum-99

Patent 5784423 Issued on July 21, 1998. Estimated Expiration Date:

September 8, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Tritium target for neutron source
Patent #: 3963934
Issued on: 06/15/1976
Inventor: Ormrod

Layered, multi-element electron-bremsstrahlung photon converter target
Patent #: 3999096
Issued on: 12/21/1976
Inventor: Funk , et al.

Process for the recovery of molybdenum-99 from an irradiated uranium alloy target
Patent #: 4701308
Issued on: 10/20/1987
Inventor: Koehly , et al.

High-flux neutron generator comprising a long-life target
Patent #: 4935194
Issued on: 06/19/1990
Inventor: Verschoore

Apparatus and methods of producing an optimal high intensity x-ray beam Patent #: 5029195
Issued on: 07/02/1991
Inventor: Danos

Inventors

Application

No. 525854 filed on 09/08/1995

US Classes:

376/156NUCLEAR TRANSMUTATION (E.G., BY MEANS OF PARTICLE OR WAVE ENERGY)

Examiners

Primary: Wasil, Daniel D.

Attorney, Agent or Firm

Hamilton, Brook, Smith & Reynolds, P.C.

Foreign Patent References

0 105 032 EP. 04/14/1984

International Class

G21G 001/12

Abstract

An apparatus, and method, are disclosed for producing a high specific activity of a radioisotope in a single increment of target material, or sequentially within in-series increments of target material, by exposing a targeted isotope in the target material to a high energy photon beam to isotopically convert the targeted isotope. In particular, this invention is used to produce a high specific activity of Mo99, of at least 1.0 Ci/gm or preferably at least about 10.0 Ci/gm, from Mo100.

Other References

Davydov, M. G., and Mareskin, S. A., "Preparation of ⁹⁹ Mo and ^99m Tc In Electron Accelerators," Radiokhimiya, 35(5): 91-96 (1993)
Domanov, E. E., et al., "Bremsstrahlung Converter with Increased Quantum Yield at < 100 keV," Pribory i Tekhnika Eksperimenta, 2: 43-46 (1991)
Nordell, B., "Production of ¹¹ C by Photonuclear Reactions," Int. J. Appl. Radiat. Isot., 35(6) :455-458 (1984)
Seltzer, S. M., et al., "Bremsstrahlung Beams From High-Power Electron Accelerators For Use in Radiation Processing," IEEE Transactions on Nuclear Science, NS-30 (2) : 1629-1633 (1983)
Brinkman, G. A., "Isotope Production with Bremsstrahlung Beams in Comparison with Proton Beams," International Journal of Applied Radiation and Isotopes, 31: 85-90 (1980)
Radna, Z. et al., "Possibility of radionuclide production by photonuclear reactions on microtrons," Institute of Electrical Engineers, Stevenage, GB, Abstract, & JAD.ENERG., vol. 34, No. 10, 1988, Czechoslovakia, pp. 365-368
Liuzzi et al., "A comparison of measured primary X-ray spectra from molybdenum and tungsten targets . . . ," Institute of Electrical Engineers, Stevenage, GB, Abstract, & 15th Annual Meeting of the American Associate of Physicist in Medicine, vol. 19, No. 2, Jul. 29, 1973 to Aug. 2, 1973, p. 258
Malinin et al., "Production of radionuclides by photonuclear reactions," Institute of Electrical Engineers, Stevenage, GB, Abstract, & Radiochem. Radioanal. Lett., vol. 53, No. 5-6, 1982, CH, pp. 311-31