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By means of a Ge(Li) \u03b3-ray detector with high resolution, the photopeaks due to y u Zr 724.3 keV \u03b3-rays and y u Zr 756.8 keV \u03b3-rays were resolved clearly from each other, while those due to y u Zr 756.8 keV \u03b3-rays and y u Nb 765.8 keV \u03b3-rays belonging to the same decay chain (mass=95) were not completely resolved but took the form of complex photopeaks as shown in Fig. 2\uff5eFig. 5. The area of each complex photopeak was resolved into two component peak areas by the two-component seperation procedure. The activities of the \u03b3-rays were measured from the resolved photopeak areas, and the activity ratios Rb, Rc, Rd and Re were calculated, which represent the activity ratios of the \u03b3-rays, [y u Zr 724.3 keV+y u Zr 756.8 keV] /y u Nb 765.8 keV, y u Zr 724.3 keV /y u Nb 765.8 keV, y u Zr 756.8 keV /y u Nb 765.8 keV, and y u Zr 724.3 keV/ [y u Zr 756.8 keV+y u Nb 765.8 keV], respectively. The numerical tables for the activity ratios Rb, Rc, Rd and Re expressed by the functions of the elapsed time after nuclear explosion were obtained by using an electronic computer (Table 4\uff5eTable 7). The experimental values of the elapsed time obtained from highly radioactive fallout particles due to the nuclear explosion in China on December 24, 1967 were in good agreement with the theoretical values obtained from calculation. 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放射性降下物中のy u Zrとy u Nbの放射能比による核爆発後の経過時間の推定について
http://hdl.handle.net/10091/10917
320d329f-cd20-4ebd-b38d-f2942601acb1
名前 / ファイル | ライセンス | アクション | |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2011-01-05 | |||||
タイトル | ||||||
タイトル | 放射性降下物中のy u Zrとy u Nbの放射能比による核爆発後の経過時間の推定について | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
その他(別言語等)のタイトル | ||||||
その他のタイトル | Estimation of the Elapsed Time after Nuclear Explosion by the Activity Ratio of y u Zr to y u Nb in the Radioactive Fallout | |||||
著者 |
帶刀, 正
× 帶刀, 正 |
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出版者 | ||||||
出版者 | 信州大学工学部 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 信州大学工学部紀要 29: 1-18 (1970) | |||||
書誌情報 |
信州大学工学部紀要 巻 29, p. 1-18, 発行日 1970-12-25 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | An estimation of the elapsed time after nuclear explosion was made by measuring the activity ratios of y u Zr to y u Nb in the radioactive fallout. By means of a Ge(Li) γ-ray detector with high resolution, the photopeaks due to y u Zr 724.3 keV γ-rays and y u Zr 756.8 keV γ-rays were resolved clearly from each other, while those due to y u Zr 756.8 keV γ-rays and y u Nb 765.8 keV γ-rays belonging to the same decay chain (mass=95) were not completely resolved but took the form of complex photopeaks as shown in Fig. 2~Fig. 5. The area of each complex photopeak was resolved into two component peak areas by the two-component seperation procedure. The activities of the γ-rays were measured from the resolved photopeak areas, and the activity ratios Rb, Rc, Rd and Re were calculated, which represent the activity ratios of the γ-rays, [y u Zr 724.3 keV+y u Zr 756.8 keV] /y u Nb 765.8 keV, y u Zr 724.3 keV /y u Nb 765.8 keV, y u Zr 756.8 keV /y u Nb 765.8 keV, and y u Zr 724.3 keV/ [y u Zr 756.8 keV+y u Nb 765.8 keV], respectively. The numerical tables for the activity ratios Rb, Rc, Rd and Re expressed by the functions of the elapsed time after nuclear explosion were obtained by using an electronic computer (Table 4~Table 7). The experimental values of the elapsed time obtained from highly radioactive fallout particles due to the nuclear explosion in China on December 24, 1967 were in good agreement with the theoretical values obtained from calculation. It was found that the error of the elapsed time after nuclear explosion estimated from the activity ratio Rb independent of the branching ratio was smaller than those obtained from the other activity ratios Rc, Rd, and Re. | |||||
資源タイプ(コンテンツの種類) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0037-3818 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00121228 |