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Estimation method of planetary fast neutron flux by a Ge gamma-ray spectrometer
https://repo.qst.go.jp/records/47625
https://repo.qst.go.jp/records/47625c27115b8-f2fb-45d1-9d60-c38dde65a938
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-01-30 | |||||
| タイトル | ||||||
| タイトル | Estimation method of planetary fast neutron flux by a Ge gamma-ray spectrometer | |||||
| 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 |
Hareyama, M.
× Hareyama, M.× Fujibayashi, Y.× Yamashita, N.× Karouji, Y.× Nagaoka, H.× Kobayashi, S.× C., Reedy R.× Gasnault, O.× Forni, O.× d'Uston, C.× Kim, K.J.× 小林 進悟 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | An intensity map of lunar fast neutrons (LFNs) and their temporal variation has been estimated by fitting “sawtooth” peaks in the energy spectra of lunar gamma rays observed by the Kaguya (SELENE) Gamma Ray Spectrometer (GRS) consisting of a high-purity germanium (HPGe) detector with a BGO scintillator. While an ordinary peak in the spectrum is produced by only gamma ray lines, the sawtooth peak is produced by gamma ray lines and recoil nuclei in the detector by Ge(n,n′γ)Ge(n,n′γ) reaction. We develop a model for the shape of the sawtooth peak and apply it to fit sawtooth peaks together with ordinary peaks in actual observed spectra on the Moon. The temporal variation of LFNs is synchronous with that of galactic cosmic rays (GCRs), and the global distribution of fast neutrons on the lunar surface agrees well with the past observation reported by the Neutron Spectrometer aboard Lunar Prospector. Based on these results, a new method is established to estimate the flux of fast neutrons by fitting sawtooth peaks on the gamma ray spectrum observed by the HPGe detector. | |||||
| 書誌情報 |
Nuclear Instruments and Methods in Physics Research A 巻 828, p. 145-155, 発行日 2016-08 |
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| 出版者 | ||||||
| 出版者 | Elsevier Science | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0168-9002 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.nima.2016.05.045 | |||||
