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Unfolding into cross sections per photon of monochromatic energy k was performed on the measured yields after correction for secondary reactions. Excitation curves were characteristic of (3,3) resonance, and their systematic features with respect of k (and E_0), A_t and x were derived and discussed with references of total photoabsorption cross sections and also of PICA (photon-induced cascade analysis) calculations. Results were consistent with our previous findings from ^\u003c51\u003eV (gamma, pi^+) ^\u003c51\u003eTi, ^\u003c51\u003eV (gamma, pi^-xn) ^\u003c51-x\u003eCr (x=0,2,3), ^\u003c89\u003eY (gamma, pi^-xn) ^\u003c89-x\u003eZr (x=0-3), ^\u003c197\u003eAu (gamma, pi^-xn) ^\u003c197-x\u003eHg (x=0-7) and ^\u003c209\u003eBi (gamma, pi^-xn) ^\u003c209-x\u003ePo (x=2-7).\n(2) The measured yields of 21 to 47 products ranging in 5-10 elements each from the targets of ^\u003c51\u003eV, ^\u003c59\u003eCo, ^\u003c89\u003eY, ^\u003c127\u003eI, ^\u003c133\u003eCs, ^\u003c139\u003eLa, ^\u003c176\u003eLu, ^\u003c197\u003eAu and ^\u003c209\u003eBi were measured as a function of E_0 from thresholds to 1000 MeV. After correction for precursor-decays, isotopic, isobaric and charge distributions and their E_0 and A_t dependences were investigated and a new empirical expression for the product formations were proposed with reference to Rudstam formula for hadron spallation. PICA calculations for bremsstrahlung spallation were performed and found not to reproduce the observed yields especially for medium to heavy targets.\n(3) While the ^\u003c22.24\u003eNa yields from ^\u003c35.37\u003eCl, ^\u003c63.67\u003eCu and ^\u003c89\u003eY were explained by spallation, photofragmentaion was evidenced with high but mass dependent yields of ^\u003c7.10\u003eBe from these targets.", "subitem_description_type": "Abstract"}]}, "item_9_description_22": {"attribute_name": "内容記述", "attribute_value_mlt": [{"subitem_description": "研究課題/領域番号:01470049, 研究期間(年度):1989 – 1990", "subitem_description_type": "Other"}, {"subitem_description": "出典:研究課題「中高エネルギ-光核反応の放射化学的研究」課題番号01470049\n(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) \n(https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-01470049/014700491990kenkyu_seika_hokoku_gaiyo/)を加工して作成", "subitem_description_type": "Other"}]}, "item_9_description_5": {"attribute_name": "提供者所属", "attribute_value_mlt": [{"subitem_description": "金沢大学理学部", 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"open_date", "date": [{"dateType": "Available", "dateValue": "2022-10-21"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "SC-PR-SAKAMOTO-K-kaken 1993-2p.pdf", "filesize": [{"value": "90.0 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_11", "mimetype": "application/pdf", "size": 90000.0, "url": {"label": "SC-PR-SAKAMOTO-K-kaken 1993-2p.pdf", "url": "https://kanazawa-u.repo.nii.ac.jp/record/60928/files/SC-PR-SAKAMOTO-K-kaken 1993-2p.pdf"}, "version_id": "6a8b69b3-0447-43d3-b796-e31d07a5d4b8"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "中高エネルギ-光核反応", "subitem_subject_scheme": "Other"}, {"subitem_subject": "パイ中間子放出反応", "subitem_subject_scheme": "Other"}, {"subitem_subject": "光核破砕", "subitem_subject_scheme": "Other"}, {"subitem_subject": "光フラグメンテ-ション", "subitem_subject_scheme": "Other"}, {"subitem_subject": "残留核収率", "subitem_subject_scheme": "Other"}, {"subitem_subject": "PICA", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Rudstamの経験式", "subitem_subject_scheme": "Other"}, {"subitem_subject": "^7Liー ^\u003c209\u003eBi", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Intermediate Energy", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Photopion", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Photospallation", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Photofragmentation", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "PICA", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Rudstam formula", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "^7Li-^\u003c209\u003eBi", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Cross Sections", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "research report", "resourceuri": "http://purl.org/coar/resource_type/c_18ws"}]}, "item_title": "中高エネルギ-光核反応の放射化学的研究", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "中高エネルギ-光核反応の放射化学的研究"}, {"subitem_title": "Radiochemical Study on Photonuclear Reactions at Intermediate Energies", "subitem_title_language": "en"}]}, "item_type_id": "9", "owner": "18", "path": ["2843"], "permalink_uri": "https://doi.org/10.24517/00067172", "pubdate": {"attribute_name": "公開日", "attribute_value": "2022-10-21"}, "publish_date": "2022-10-21", "publish_status": "0", "recid": "60928", "relation": {}, "relation_version_is_last": true, "title": 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中高エネルギ-光核反応の放射化学的研究
https://doi.org/10.24517/00067172
https://doi.org/10.24517/0006717284fa1f88-e3c1-455a-a70d-cc76da4a1c7e
名前 / ファイル | ライセンス | アクション |
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SC-PR-SAKAMOTO-K-kaken 1993-2p.pdf (90.0 kB)
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Item type | 報告書 / Research Paper(1) | |||||
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公開日 | 2022-10-21 | |||||
タイトル | ||||||
タイトル | 中高エネルギ-光核反応の放射化学的研究 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Radiochemical Study on Photonuclear Reactions at Intermediate Energies | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
ID登録 | ||||||
ID登録 | 10.24517/00067172 | |||||
ID登録タイプ | JaLC | |||||
著者別表示 |
Sakamoto, Koh
× Sakamoto, Koh |
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提供者所属 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 金沢大学理学部 | |||||
書誌情報 |
平成2(1990)年度 科学研究費補助金 一般研究(B) 研究成果報告書概要 en : 1990 Fiscal Year Final Research Report Summary 巻 1989 – 1990, p. 2p., 発行日 1993-08-11 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 40ー1000MeVの最大エネルギ-(E_0)をもつ制動放射線を用い、Li〜Biにわたる標的核のパイ中間子放出反応、核破砕反応、フラグメンテ-ション反応で生成する放射性核種の収率測定を、小さなE_0間隔で行なった。(1) ^7Li, ^<11>B, ^<27>Al, ^<41>K, ^<51>V, ^<59>Co, ^<87>Rb, ^<89>Y, ^<88>Sr, ^<103>Rh, ^<127>I, ^<133>Cs, ^<139>Ba, ^<181>Ta, ^<197>Au及び ^<209>Biは(γ、π^+)あるいは(γ、π^ーxn)反応で ^7Be, ^<11>C, ^<27>Mg, ^<41>Ar, ^<51ーx>Cr(x=0ー3), ^<59>Fe, ^<59ーx>Ni(x=2,3), ^<87>Kr, ^<88>Rb, ^<89ーs>Zr(x=0ー3), ^<103>Ru, ^<103ーx>Pd, ^<127ーx>Xe(x=0ー6), ^<133>Xe, ^<133ーx>Ba(x=0ー9), ^<139>Ba, ^<139ーx>Ce(x=0ー8), ^<181>Hf, ^<197ーx>Hg, ^<209ーx>Bi(γ、π ^ーxn) ^<209ーx>Po(x=2ー7)を生成する。これらは、各標的の核破砕から生成する高エネルギ-中性子の(n,p)、または陽子の(p,x'n)反応で同一核種が作られるが、π放出のしきい値以下のデ-タを基に補正した。その結果、(γ,π^±)反応の収率は標的質量(A_t)の増加と共にわずかに増加する(〓A_t^<1/3>)が、その比は3ー5と異常に大きい。π^ー放出は多数の中性子と共に放出される反応が優勢でA_tの増大と共に急増するが、いずれもA_t≧100〜140でlimitingを示す、等のことが明らかになった。(2)核破砕では、 ^<51>V, ^<59>Co, ^<89>Y, ^<127>I, ^<133>Cs, ^<139>La, ^<176>Lu, ^<197>Auに及び ^<209>Biについて、各々標的核から5〜10元素にわたる各21〜47核種の生成収率のE_0変化を調べた。Rudstamによるハドロン誘起核破砕の経験式に非線型最小二乗fitをさせて経験式が含むパラメ-タを決め、制動放射線の場合の新しい表式を導いた。ここで見い出したハドロン反応との違いを、初期相互作用から核内カスケ-ド・蒸発に至る過程、特に励起エネルギ-の観点から考察した。(1)、(2)ともに光子誘起衝突カスケ-ドの理論計算は、中重核では再現性がよいが、重核でのずれが極めて大きく、励起エネルギ-及び核パラメ-タの再考が必要である。3)A≦20〜30で生成率が急増するハドロン反応と異なり、 ^<35,37>Cl, ^<59>Co, ^<53,55>Cu及び ^<89>Yの光核反応では、 ^<22.24>Naは破砕過程で説明できる。 ^<7,10>Beについてはフラグメンテ-ションを考えなければならないが、同時にα粒子放出も起こっていることが示唆された。そのA_t依存性も大きいが、ハドロン反応とは異なる傾向を示す。(1)〜(3)共に重核での研究が重要で、核分裂と共に不確定性が残った。 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A systematic radiochemical study on bremsstrahlung-induced photopion, photospallation and photofragmentation was performed on targets ranging from ^7Li to ^<207>Bi at end-point energies (E_0) from 40 to 1000 MeV in steps of 100 MeV or less. (1) The yields of ^7Be, ^<11>C, ^<27>Mg, ^<41>Ar, ^<59>Fe, ^<87>Kr, ^<88>Rb, ^<103>Ru, ^<133>Xe, ^<139>Ba and ^<181>Hf from (gamma, pi^<<plus-minus>>) reaction and of ^<59-x>Ni(x=2,3), ^<127-x>Xe(x=0-6), ^<133-x>Ba(x=0-9), ^<139-x>Ce (x=0-8) from (gamma, pi ^-xn reactions were obtained from ^7Li, ^<11>B, ^<27>Al, ^<41>K, ^<59>Co, ^<87>Rb, ^<88>Sr, ^<103>Rh, ^<127>I, ^<133>Cs, ^<139>La and ^<181>Ta. Unfolding into cross sections per photon of monochromatic energy k was performed on the measured yields after correction for secondary reactions. Excitation curves were characteristic of (3,3) resonance, and their systematic features with respect of k (and E_0), A_t and x were derived and discussed with references of total photoabsorption cross sections and also of PICA (photon-induced cascade analysis) calculations. Results were consistent with our previous findings from ^<51>V (gamma, pi^+) ^<51>Ti, ^<51>V (gamma, pi^-xn) ^<51-x>Cr (x=0,2,3), ^<89>Y (gamma, pi^-xn) ^<89-x>Zr (x=0-3), ^<197>Au (gamma, pi^-xn) ^<197-x>Hg (x=0-7) and ^<209>Bi (gamma, pi^-xn) ^<209-x>Po (x=2-7). (2) The measured yields of 21 to 47 products ranging in 5-10 elements each from the targets of ^<51>V, ^<59>Co, ^<89>Y, ^<127>I, ^<133>Cs, ^<139>La, ^<176>Lu, ^<197>Au and ^<209>Bi were measured as a function of E_0 from thresholds to 1000 MeV. After correction for precursor-decays, isotopic, isobaric and charge distributions and their E_0 and A_t dependences were investigated and a new empirical expression for the product formations were proposed with reference to Rudstam formula for hadron spallation. PICA calculations for bremsstrahlung spallation were performed and found not to reproduce the observed yields especially for medium to heavy targets. (3) While the ^<22.24>Na yields from ^<35.37>Cl, ^<63.67>Cu and ^<89>Y were explained by spallation, photofragmentaion was evidenced with high but mass dependent yields of ^<7.10>Be from these targets. |
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内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 研究課題/領域番号:01470049, 研究期間(年度):1989 – 1990 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 出典:研究課題「中高エネルギ-光核反応の放射化学的研究」課題番号01470049 (KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-01470049/014700491990kenkyu_seika_hokoku_gaiyo/)を加工して作成 |
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著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/search/?qm=10013377 | |||||
関連名称 | https://kaken.nii.ac.jp/search/?qm=10013377 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-01470049/ | |||||
関連名称 | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-01470049/ | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-01470049/014700491990kenkyu_seika_hokoku_gaiyo/ | |||||
関連名称 | https://kaken.nii.ac.jp/ja/report/KAKENHI-PROJECT-01470049/014700491990kenkyu_seika_hokoku_gaiyo/ |