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dc.contributor.author | 植村, 吉明 | ja |
dc.contributor.alternative | Uemura, Yoshiaki | en |
dc.contributor.transcription | ウエムラ, ヨシアキ | ja-Kana |
dc.date.accessioned | 2009-05-07T07:30:33Z | - |
dc.date.available | 2009-05-07T07:30:33Z | - |
dc.date.issued | 1950-09-30 | - |
dc.identifier.issn | 0023-6071 | - |
dc.identifier.uri | http://hdl.handle.net/2433/74165 | - |
dc.description.abstract | The γ-ray absorption coefficients of Pb, Sn, Cu, and Al were measured for the 17.6 Mev and 6.1 Mev γ-rays produced at the first proton resonance of the (Li-p) and (F-p) reactions respectively. The experimental arrangement used is shown in Fig. 1. In order to obtain the homogeneity of γ-rays, a filter to absorb the x-rays from the target by proton bombardment was not used near the target and each sample used had a diameter which was enough to cover the outside of the canalizing lead slit. Therefore, to detect the γ-rays, a thick lead plate was used in front of the window of the G-M counter of end-window type. The thickness of the plate was 7.5mm and 5.9mm for the 17.6 Mev and 6.1 Mev γ-rays respectively. To exclude the stray radiation, a set of canalizing lead slit and plug was placed upon the lead counter which was housed in a large lead box. Then the difference of counts with and without the lead plug for each sample is taken to be the true decrement of the γ-rays through the canal due to the absorption by the substance. Furthermore, in order to monitor the γ-ray intensity, a 6.5 mm lead counter shielded by a lead cylinder was placed in such a position that suffers no effect by the conditions of the sample. The absorption coefficients obtained under these conditions are given as follows: [Table omitted] Analysing these experimental data, the absorption due to the creation of electron pairs seems to be proportional to Z2 in the case of the 17.6 Mev γ-rays. However, it is to be noted that the absorption coefficient of Al for the 17.6 Mev γ-rays is found to be larger than the theoretical value. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | jpn | - |
dc.publisher | 京都大学化学研究所 | ja |
dc.publisher.alternative | Institute for Chemical Research, Kyoto University | en |
dc.subject.ndc | 430 | - |
dc.title | 17 Mev 竝に 6.1 Mev γ線の二,三物質による吸收係数の測定 | ja |
dc.title.alternative | Measurements of Absorption Coefficients of 17 Mev and 6.1 Mev γ-Rays in Several Elements | en |
dc.type | departmental bulletin paper | - |
dc.type.niitype | Departmental Bulletin Paper | - |
dc.identifier.ncid | AN00060702 | - |
dc.identifier.jtitle | 京都大学化学研究所報告 | ja |
dc.identifier.volume | 22 | - |
dc.identifier.spage | 18 | - |
dc.identifier.epage | 30 | - |
dc.textversion | publisher | - |
dc.sortkey | 04 | - |
dcterms.accessRights | open access | - |
dcterms.alternative | 17 Mev 並に 6.1 Mev γ線の二, 三物質による吸収係数の測定 | ja |
出現コレクション: | 22集 |
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