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Measurement of cosmic-ray origin neutrons using a scintillation detector at the summit of Mt. Fuji
https://repo.qst.go.jp/records/46297
https://repo.qst.go.jp/records/4629782a90c8c-22bf-497e-bdc5-5075f92a28ff
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2012-04-17 | |||||
| タイトル | ||||||
| タイトル | Measurement of cosmic-ray origin neutrons using a scintillation detector at the summit of Mt. Fuji | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Yajima, Kazuaki
× Yajima, Kazuaki× Yasuda, Hiroshi× 矢島 千秋× 保田 浩志 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Cosmic-ray origin neutrons were measured with a scintillation detector at the summit of Mt. Fuji at an altitude of 3776 m during the summer of 2008. The averaged neutron ambient dose equivalent rate converted from the count rates of the detector was 0.47 (+/-) 0.001 micro Sv/h, which is approximately four times greater than the calculated value of 0.11 (+/-) 0.01 micro Sv/h. It is postulated that the discrepancy between the measured and calculated neutron ambient dose equivalent rates is on account of the additional charged particle component of the mixed radiation field. To examine the characteristics of the detector at high altitude, a simple model equation which relates the count rates of the detector to the calculated fluence rates of cosmic radiation has been supposed. Based on the model equation it is estimated that the neutron ambient dose equivalent rate would be 0.14 (+/-) 0.04 micro Sv/h, and the proton contribution would be 0.28 (+/-) 0.03 micro Sv/h converted as neutron ambient dose equivalent rate. The results agree to the values of the measured and calculated neutron dose equivalent rates, and the discrepancy between them within the errors. | |||||
| 書誌情報 |
Radiation Measurements 巻 46, 号 12, p. 1724-1727, 発行日 2011-12 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1350-4487 | |||||
