著者

河合 広 本田 嘉秀 森嶋 弥重 古賀 妙子 木村 雄一郎 西脇 安

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.3, no.2, pp.273-279, 1968 (Released:2010-03-15)

参考文献数

13

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We have observed properties of radioactive fallout originated from the first, the second, the third, the fourth and the fifth Chinese nuclear explosions. The differences in gross beta-activities, activities per unit volume and their particle sizes of highly radioactive particles are discussed with relation to the differences in burst conditions among the five explosions from which they originated.It was found that radioactivities of the highly radioactive particles were roughly proportional to their volumes. The differences in the radioactive decay rates of highly radioactive fallout particles were found in connection with their colors.From the results of decay characteristics of gross beta-activities and γ-ray spectra of fallout samples, it was found that the contribution of radioactivities of 239Np in samples from the fifth Chinese explosion was larger than that from the third Chinese explosion.In comparison between the γ-ray spectra of highly radioactive fallout particles from the third and the fifth Chinese explosions, the particles from the third Chinese explosion were enriched in 95Zr+95Nb and impoverished in 103Ru, while on the particles from the fifth Chinese explosion, the reverse of phenomenon above mentioned was observed.

著者

中村 敏 上野 陽里 河合 広

出版者

公益社団法人 日本アイソトープ協会

雑誌

RADIOISOTOPES (ISSN:00338303)

巻号頁・発行日

vol.27, no.3, pp.143-145, 1978-03-15 (Released:2010-07-21)

参考文献数

9

著者

河合 広 カワイ ヒロシ Kawai Hiroshi 本田 嘉秀 ホンダ ヨシヒデ Honda Yoshihide 森嶋 弥重 モリシマ ヒロシゲ Morishima Hiroshige 古賀 妙子 コガ タエコ Koga Taeko 木村 雄一郎 キムラ ユウイチロウ Kimura Yuichiro 西脇 安 ニシワキ ヤスシ Nishiwaki Yasushi

出版者

近畿大学原子力研究所

雑誌

近畿大学原子力研究所年報 (ISSN:03748715)

巻号頁・発行日

pp.39-43, 1965

著者

西脇 安 河合 広 本田 嘉秀

出版者

近畿大学

雑誌

近畿大学原子力研究所年報 (ISSN:03748715)

巻号頁・発行日

vol.3, pp.43-49, 1964