Patent Number: 
Section: claims

1. An apparatus comprising:a support;a radioactive source on the support, the radioactive source comprising nuclei; andan excitation element coupled to the support,wherein upon activation of the excitation element, radiation emission from the radioactive source is reduced wherein excitation is transferred from at least one decay product nucleus of the radioactive source to one or more nuclei of the support; wherein the one or more nuclei of the support to which the excitation is transferred are of the same isotope as the decay product nucleus. 2. The apparatus of claim 1, wherein the excitation element comprises a vibration source. 3. The apparatus of claim 1, wherein excitation is transferred from nuclei of the radioactive source to nuclei of the support. 4. The apparatus of claim 3, wherein the excitation transfer occurs in bulk from multiple nuclei of the radioactive source. 5. The apparatus of claim 3, the excitation transfer causes emissions from the support. 6. The apparatus of claim 1, wherein the excitation is transferred by a process in which excitation is transferred from the decay product nucleus in an excited state to the one or more nuclei of the support. 7. The apparatus of claim 6, wherein the process by which the excitation is transferred comprises energy being transferred from the decay product nucleus in the excited state to the one or more nuclei of the support. 8. The apparatus of claim 7, wherein the one or more nuclei of the support to which the energy is transferred are each in a ground state of the isotope before the energy is transferred. 9. The apparatus of claim 8, wherein each of the one or more nuclei of the support to which the energy is transferred are temporarily in at least one excited state of the isotope after the energy is transferred. 10. The apparatus of claim 7, wherein the decay product nucleus is in the excited state before the excitation is transferred due to radioactive decay of the radioactive source. 11. The apparatus of claim 6, wherein the process by which the excitation is transferred comprises the energy being transferred from the decay product nucleus in the excited state to the one or more nuclei of the support without being transferred through gamma ray emission and subsequent absorption. 12. The apparatus of claim 11, wherein the process by which the excitation is transferred comprises the energy being transferred from the decay product nucleus in the excited state to the one or more nuclei of the support without any intermediate particle or nucleus carrying the transferred energy. 13. The apparatus of claim 12, wherein the process by which the excitation is transferred comprises the energy being transferred via coupling to off-resonant states where energy is not conserved.