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The X-ray ionizations and atmospheric temporal evolutions of different altitude nuclear explosions at different distances are numerically simulated. The effects of energetic electron impact ionization on radiation ionization process are analyzed in this paper. It is concluded that the energetic electron impact ionization process is important for radiation ionization, and in the case of 1 kt equivalent explosion at 80 km, the electron density at 1.5 km distance from explosion center increases two orders because of the energetic electron impact ionization. In 5 μs the spectral energy distribution of energetic electrons varies with time, and the number density of energetic electrons decaying with electron energy will present an approximately negative exponential distribution. The peak time of electron density and the influence area of ionization increase with explosion altitude increasing. The ionization effect for 1 kt equivalent explosion at 80 km has an important influence on micro-wave communication in a 100 km range.
[1] Wang J G, Niu S L, Zhang D H, Qiao D J 2010 The Parameter Manual Book of High-Altitude Nuclear Explosion Effects (Beijing: Atomic Energy Press) p31 (in Chinese) [王建国, 牛胜利, 张殿辉, 乔登江 2010 高空核爆炸效应参数手册 (北京: 原子能出版社) 第31页]
[2] Tao Y L, Wang J G, Niu S L, Zhu J H, Fan R Y 2010 Acta Phys. Sin. 59 5915 (in Chinese) [陶应龙, 王建国, 牛胜利, 朱金辉, 范如玉 2010 59 5915]
[3] Ouyang J M, Guo W, Wang L, Shao F Q 2004 Chin. Phys. 13 2174
[4] Ouyang J M, Ma Y Y, Shao F Q, Zou D B 2012 Acta Phys. Sin. 61 083201 (in Chinese) [欧阳建明, 马燕云, 邵福球, 邹德滨 2012 61 083201]
[5] Cullcn D E, Hubbell J H, Kissel L 1997 The Evaluated Photon Data Library (Livermore: Lawrence Livermore National Laboratory) UCRL-50400
[6] Hesstwedt E, Hov O, Isaken 1978 Int. J. Chem. Kinet 10 971
[7] Brasseur G, Solomon S 1984 Aeronomy of the Middle Atmosphere (Boston: D. Reidel Publishing Company) p213
[8] Heicklen J 1976 Atmospheric Chemistry (New York: Academic Press) p7
[9] Chen F F 1974 Introduction to Plasma Physics and Controlled Fusion (New York: Springer Science Business Media) p85
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[1] Wang J G, Niu S L, Zhang D H, Qiao D J 2010 The Parameter Manual Book of High-Altitude Nuclear Explosion Effects (Beijing: Atomic Energy Press) p31 (in Chinese) [王建国, 牛胜利, 张殿辉, 乔登江 2010 高空核爆炸效应参数手册 (北京: 原子能出版社) 第31页]
[2] Tao Y L, Wang J G, Niu S L, Zhu J H, Fan R Y 2010 Acta Phys. Sin. 59 5915 (in Chinese) [陶应龙, 王建国, 牛胜利, 朱金辉, 范如玉 2010 59 5915]
[3] Ouyang J M, Guo W, Wang L, Shao F Q 2004 Chin. Phys. 13 2174
[4] Ouyang J M, Ma Y Y, Shao F Q, Zou D B 2012 Acta Phys. Sin. 61 083201 (in Chinese) [欧阳建明, 马燕云, 邵福球, 邹德滨 2012 61 083201]
[5] Cullcn D E, Hubbell J H, Kissel L 1997 The Evaluated Photon Data Library (Livermore: Lawrence Livermore National Laboratory) UCRL-50400
[6] Hesstwedt E, Hov O, Isaken 1978 Int. J. Chem. Kinet 10 971
[7] Brasseur G, Solomon S 1984 Aeronomy of the Middle Atmosphere (Boston: D. Reidel Publishing Company) p213
[8] Heicklen J 1976 Atmospheric Chemistry (New York: Academic Press) p7
[9] Chen F F 1974 Introduction to Plasma Physics and Controlled Fusion (New York: Springer Science Business Media) p85
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