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  1. B200 工学部/工学研究科
  2. B200b 紀要
  3. Memoirs of the Faculty of Engineering, Nagoya University
  4. 17(2)

Some properties of naturally occuring radiations and radioactive ions in the atmosphere

https://doi.org/10.18999/memfenu.17.2.125
https://doi.org/10.18999/memfenu.17.2.125
1d937ab9-6557-4c5f-90bb-00bd2f56cb4f
名前 / ファイル ライセンス アクション
17-2-01.pdf 17-2-01.pdf (5.4 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2021-02-04
タイトル
タイトル Some properties of naturally occuring radiations and radioactive ions in the atmosphere
言語 en
著者 Kawano, Minoru

× Kawano, Minoru

WEKO 103199

en Kawano, Minoru

Search repository
Ikebe, Yukimasa

× Ikebe, Yukimasa

WEKO 103200

en Ikebe, Yukimasa

Search repository
Nakashima, Yoshiyuki

× Nakashima, Yoshiyuki

WEKO 103201

en Nakashima, Yoshiyuki

Search repository
Shimizu, Kuniyasu

× Shimizu, Kuniyasu

WEKO 103202

en Shimizu, Kuniyasu

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
抄録
内容記述 This paper is consisted of two parts. Chapter 1 is concerned with the ionizations by the alpha-, beta-, and gamma-radiations from the atmosphere and the ground. The specially designed ionization chamber and the plastic wall ionization chamber are used for measuring the rate of ion pair production by the beta-, and gamma-radiations respectively. The charcoal trapping method is used for measuring the rate of ion pair production by the alpha-radiation. The survey was carried out at 32 points in and around Nagoya City. The beta-radiation plays the largest contribution for the ionization of the air near the ground, and the gamma-radiation including cosmic-ray is the next. The rate of ion pair production due to the alpha-radiation in the atmosphere is almost 1 J on the average. The contribution of the low energy radiation below 40 KeV for the ionization of the air close to the ground is almost the same with that of the alpha-radiation. Chapter 2 is concerned with the properties of the radioactive ions. The energy-spectra of alpha-particles radiated from the radioactive ions in the three ranges of critical mobility were measured. The results showed that the radioactive ions of which critical mobilities being 4.4 cm^2/sec V and 0.7 cm^2/sec V carry only RaA, and those of which critical mobility being 0.2 cm^2/sec V carry not only RaA but also RaB and RaC. The results of simultaneous measurements show that the radioactive ions of which critical mobility being 4.4 cm^2/sec V only are free from any kind of condensation nuclei. The mean life of radioactive ion in the range described above is 23 sec on the mountain top, and is 1.3 sec on the campus inside a big city.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 Faculty of Engineering, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/memfenu.17.2.125
ID登録タイプ JaLC
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0027-7657
書誌情報 en : Memoirs of the Faculty of Engineering, Nagoya University

巻 17, 号 2, p. 125-159, 発行日 1966-03-20
著者版フラグ
値 publisher
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