| 摘要 |
<p>1,138,310. Utilizing energy of radiations. NORTH AMERICAN AVIATION Inc. 7 June, 1966 [17 June, 1965], No. 25391/66. Heading G6P. In a radio-active power generator, heat, which is produced in an alpha-particle emitter, is transformed to electrical energy by thermoelectric or thermionic elements surrounding the emitter. In one embodiment, the alpha emitter is plutonium oxide, Pu<SP>238</SP>O 2 <SP>16</SP>. The oxygen comprises the 0-16 isotope with only trace amounts of 0-17, 0-18. The alpha-neutron reaction with the 0-16 is less than that with 0-17 and 0-18, hence a smaller number of secondary neutrons is generated, than would be the case with 0-17, 0-18, and a reduced weight of shielding is necessary. The threshold energy of the alpha-neutron reaction of 0-16 is greater than the maximum energy of the emitted alpha particles. In a further embodiment, Po<SP>210</SP>O<SP>16</SP>, is employed where the half life of 138 days is required.</p> |
