摘要
The influence of theα-decay radionuclide layer(the energy ofα-particles are 5.45 Me V)on the radar cross section(RCS)of sphere objects was calculated under different radioactivities,frequencies,and sphere radii.When the sphere radius is smaller than 50 cm,the tendency of the electron densities of the plasma slab is to ascend first and then descend,and the typical maximum electron densities with a radioactivity of 10 Ci/cm2raises from 7.02×1010to 1.76×1011when the sphere radii increases from 10 to 300 cm.The average data of a normalized RCS of a sphere with radius of 12.5 cm,which is coated with a radionuclide layer with different radioactivities are-0.35,-0.50,-0.79 and-1.13 d B when the radioactivity is 1,2,5 and 10 Ci/cm2,respectively.
The influence of the α-decay radionuclide layer （the energy of α-particles are 5.45 MeV） on the radar cross section （RCS） of sphere objects was calculated under different radioactivities, frequencies, and sphere radii. When the sphere radius is smaller than 50cm, the tendency of the electron densities of the plasma slab is to ascend first and then descend, and the typical maximum electron densities with a radioactivity of 10 Ci/cm^2 raises from 7.02 × 10^10 to 1.76 × 10^11 when the sphere radii increases from 10 to 300cm. The average data of a normalized RCS of a sphere with radius of 12.5 cm, which is coated with a radionuclide layer with different radioactivities are -0.35, -0.50, -0.79 and -1.13 dB when the radioactivity is 1, 2, 5 and 10 Ci/cm^2, respectively.
基金
Supported by National Natural Science Foundation of China(Nos.50977042 and 10904061)
the program of Minisity of Science and Technology of China(No.2006AA03Z458)
