• 検索結果がありません。

䠄䠍䠏䠅௵ព䛾≧ែኚ໬䛻ᑐᛂྍ⬟䛺ᮍ⮫⏺ᗘ ᐃᡭἲ䛻㛵䛩䜛◊✲

N/A
N/A
Protected

Academic year: 2021

シェア "䠄䠍䠏䠅௵ព䛾≧ែኚ໬䛻ᑐᛂྍ⬟䛺ᮍ⮫⏺ᗘ ᐃᡭἲ䛻㛵䛩䜛◊✲ "

Copied!
5
0
0

読み込み中.... (全文を見る)

全文

(1)

䠄䠍䠏䠅௵ព䛾≧ែኚ໬䛻ᑐᛂྍ⬟䛺ᮍ⮫⏺ᗘ ᐃᡭἲ䛻㛵䛩䜛◊✲

ྡྂᒇ኱Ꮫ኱Ꮫ㝔㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 ᕤᏛ◊✲⛉

㐲⸨㻌 ▱ᘯ䚸㔝୰㻌 ᮅ᪥䚸௒஭㻌 㡴

㏆␥኱ᏛཎᏊຊ◊✲ᡤ ᕥ㏆㻌 ᩔኈ䚸ᶫᮏ㻌 ᠇࿃

䠍䠍䠊䛿䛨䜑䛻

ᡃ䚻䛾◊✲䜾䝹䞊䝥䛷䛿䚸ᮍ⮫⏺ᗘ ᐃᡭἲ䠄᰾⇞ᩱ䜢ྵ䜣䛰య⣔䛜䛹䜜䛰䛡⮫⏺ᮍ‶䛛ᐃ㔞

ⓗ䛻 ᐃ䛩䜛᪉ἲ䠅䛻㛵䛩䜛◊✲㛤Ⓨ䛻ྲྀ䜚⤌䜣䛷䛔䜛䚹≉䛻䚸 ᐃᑐ㇟䛸䛧䛶䚸ᮾி㟁ຊ㻌 ⚟ᓥ➨

୍ཎᏊຊⓎ㟁ᡤ䛻䛚䛡䜛⇞ᩱ䝕䝤䝸ྲྀฟ䛧సᴗ᫬䜔䚸೵Ṇ୰ཎᏊ⅔䛾⇞ᩱ䝅䝱䝑䝣䝸䞁䜾᫬䛺䛹䛾≧

ἣ䜢᝿ᐃ䛧䚸䛭䜜䜙䛾≧ἣୗ䛷䜒㐺⏝ྍ⬟䛺ᮍ⮫⏺ᗘ ᐃᡭἲ䛻䛴䛔䛶◊✲䜢㐍䜑䛶䛔䜛䚹௨ୖ䛷

㏙䜉䛯≧ἣ䛻䛚䛡䜛ᮍ⮫⏺ᗘ ᐃ䛾ㄢ㢟䛸䛧䛶䚸௨ୗ䛾Ⅼ䜢ᣲ䛢䜛䛣䛸䛜䛷䛝䜛䚹

9 య⣔䛾ヲ⣽᝟ሗ䛜୙᫂䚸䛒䜛䛔䛿୙☜䛛䛥䛜኱䛝䛔䚹ᚑ䛳䛶䚸㐃⥆䜶䝛䝹䜼䞊䝰䞁䝔䜹䝹䝻ィ

⟬䝁䞊䝗➼䛻䜘䜛஦๓䛾ᩘ್ゎᯒ䛻䜘䜚䚸ᮍ⮫⏺ᗘ ᐃ䛻ᚲせ䛺᰾≉ᛶ䝟䝷䝯䞊䝍䠄୰ᛶᏊ⏕

ᡂ᫬㛫Ȧ䚸ᐇຠ㐜Ⓨ୰ᛶᏊ๭ྜߚୣ୤୤䠅䜢ホ౯䛩䜛䛣䛸䛜㞴䛧䛔䚹

9 ⇞ᩱ⿦Ⲵ䞉ᘬᢤ䛾䜘䛖䛺䚸኱䛝䛺య⣔ኚ໬䜢క䛖㐣Ώኚ໬䛾≧ἣ䜢⪃䛘䛯ሙྜ䚸⅔ᚰ䛾ᐇຠቑ ಸ⋡݇ୣ୤୤䛾䜏䛜ኚ໬䛰䛡䛷䛺䛟䚸እ㒊୰ᛶᏊ※ᙉᗘܵ(⇞ᩱෆ䛻ෆᅾ䛩䜛⮬Ⓨ᰾ศ⿣※䜔

ሺߙǡ ሻ※䛾䜘䛖䛺ᅛ᭷୰ᛶᏊ※)䜔୍Ⅼ⅔ື≉ᛶ䝟䝷䝯䞊䝍Ȧǡ ߚୣ୤୤䜒ྠ᫬䛻ኚ໬䛧ᚓ䜛䚹䜎䛯䚸䛭

䜜䜙䛾᫬㛫ኚ໬䜒䝇䝔䝑䝥≧䛸䛿䜏䛺䛫䛪䚸౛䛘䜀䝷䞁䝥≧䛾䜘䛖䛺䚸䛒䜛⛬ᗘ䛾᫬㛫䜢せ䛩䜛 㐣Ώኚ໬䛸䛺䜛䚹

ୖ㏙䛧䛯ㄢ㢟䜢ゎỴ䛩䜛䛯䜑䛻䚸ᡃ䚻◊✲䜾䝹䞊䝥䛷䛿᫬㛫㡿ᇦศ๭✚ศἲ(Time-Domain Decomposition-based Integral method, TDDIἲ)1䛻䜘䜛䝗䝹༢఩ᮍ⮫⏺ᗘ ᐃᡭἲ䜢⪃᱌䛧䚸௬

᝿ⓗ䛺ᩘ್ᐇ㦂䜢㏻䛨䛶ᥦ᱌ᡭἲ䛾᭷ຠᛶ䛻䛴䛔䛶᳨ウ䛧䛶䛝䛯䚹

䛥䜙䛻䚸ヲ⣽᝟ሗ䛜୙᫂䛺య⣔䛻䛚䛔䛶䚸୰ᛶᏊ᳨ฟᩘ䛾᫬⣔ิ䝕䞊䝍䛾䜏䛛䜙ᮍ⮫⏺ᗘ⤯ᑐ್

䜢ᴫ⟬䛩䜛ᡭἲ䛸䛧䛶䚸⅔㞧㡢ゎᯒ䛻ᇶ䛵䛟୕ḟ୰ᛶᏊ┦㛵ἲ2䛻ὀ┠䛧䚸᰾⇞ᩱ䜢ྵ䜎䛺䛔㠀ቑಸ య⣔䛻䛚䛡䜛 ᐃᐇ㦂䛺䛹䛾ᐇドヨ㦂3䜒㐍䜑䛶䛝䛯䚹

2019ᖺᗘඹྠ฼⏝ᐇ㦂䛷䛿䚸㏆␥኱ᏛཎᏊ⅔(UTR-KINKI)䛾ᮍ⮫⏺⅔ᚰ䛻䛚䛔䛶䚸Pu-Be୰

ᛶᏊ⥺※䛸ไᚚᲬ䜢ྠ᫬䛻᧯స䛩䜛䛣䛸䛻䜘䜚䚸ᐇຠቑಸ⋡݇ୣ୤୤䛸እ㒊୰ᛶᏊ※ᙉᗘܵ䛜ྠ᫬䛻ኚ໬

䛩䜛䜘䛖䛺ᮍ⮫⏺㐣Ώኚ໬ᐇ㦂䜢ᐇ᪋䛧䚸TDDIἲ䛻䜘䜛ᮍ⮫⏺ᗘ ᐃἲ䛾᭷ຠᛶ䛻䛴䛔䛶ᐇドヨ 㦂䜢⾜䛳䛯䚹ຍ䛘䛶䚸Pu-Be୰ᛶᏊ⥺※䛾↓䛔ཎᏊ⅔೵Ṇ୰䛾≧ែ䛻䛚䛔䛶䚸୰ᛶᏊ᳨ฟᩘ䛾᫬⣔

ิ䝕䞊䝍䜢 ᐃ䛧⥆䛡䜛䛣䛸䛻䜘䜚䚸೵Ṇ᫬UTR-KINKI䛻䛚䛡䜛୕ḟ୰ᛶᏊ┦㛵ἲᐇ㦂䜢ึ䜑䛶ᐇ

᪋䛧䛯䚹

䠎䠎䠊᫬㛫㡿ᇦ✚ศἲ((TDDIἲἲ))

䜎䛪䚸TDDIἲ䛻䜘䜛䝗䝹༢఩䛾ᮍ⮫⏺ᗘ ᐃἲ䛻䛴䛔䛶ᴫせ䜢㏙䜉䜛䚹ึᮇ≧ែ䛸䛧䛶䚸ᮍ⮫⏺

ᗘെߩൌ ൫ͳ െ ݇ୣ୤୤ǡ଴൯ ݇ൗ ୣ୤୤ǡ଴䚸እ㒊୰ᛶᏊ※ᙉᗘܵ䚸୍Ⅼ⅔ື≉ᛶ䝟䝷䝯䞊䝍Ȧǡ ߚୣ୤୤ǡ଴䛜୍ᐃ䛾᮲௳

ୗ䛷ᐃᖖ≧ែ䛻㐩䛧䛯ᮍ⮫⏺⅔ᚰ䜢⪃䛘䜛䚹䛣䛾ᮍ⮫⏺⅔ᚰ䛾≧ែ䛜䚸᫬㛫ݐ ൑ ݐ ൑ ݐ䛾㛫䛻䚸ึ

ᮇ≧ែ൫െߩǡ ܵǡ Ȧǡ ߚୣ୤୤ǡ଴൯䛛䜙ู䛾≧ែ൫െߩǡ ܵǡ Ȧǡ ߚୣ୤୤ǡଵ൯䛻ኚ໬䛧䛯䛸䛩䜛䚹௨ୖ䛾䜘䛖䛺㐣Ώኚ໬

(2)

䛻䛚䛔䛶 ᐃ䛥䜜䛯୰ᛶᏊィᩘ⋡݊ሺݐሻ䛾᫬㛫ኚ໬䜢ศᯒ䛩䜛䛣䛸䛷䚸TDDIἲ䛷䛿௨ୗ䛾䜘䛖䛻≧ែ

ኚ໬ᚋ䛾䝗䝹༢఩ᮍ⮫⏺ᗘെߩΤߚୣ୤୤ǡଵ䜢᥎ᐃ䛩䜛䛣䛸䛜䛷䛝䜛䚹

െߩ

ߚୣ୤୤ǡଵ

σ ܽ

ߣቀ݊݁ିఒሺ௧ି௧െ ݊൅ ߣ׬ ݊ሺݐሻ݁ ିఒሺ௧ି௧ሻ݀ݐ

௜ୀଵ

׬ ሺ݊ሺݐሻ െ ݊ ሻ݀ݐ

(1)

݊ 䠖㐣Ώኚ໬๓䛾ᐃᖖ≧ែ䛻䛚䛡䜛୰ᛶᏊィᩘ⋡

݊ 䠖㐣Ώኚ໬ᚋ䛾ᐃᖖ≧ែ䛻䛚䛡䜛୰ᛶᏊィᩘ⋡

ܽ 䠖➨݅⩌䛾㐜Ⓨ୰ᛶᏊඛ⾜᰾䛾┦ᑐ཰⋡

ߣ 䠖➨݅⩌䛾㐜Ⓨ୰ᛶᏊඛ⾜᰾䛾ᔂቯᐃᩘ

 ᐃᑐ㇟䛻䛚䛡䜛୺䛺᰾ศ⿣ᛶ᰾✀(౛䠖235U)䛜᪤▱䛷䛒䜜䜀䚸ܽǡ ߣ䛻䛴䛔䛶䛿ᩥ⊩್䜢⏝䛔䜛䛣䛸 䛜䛷䛝䜛䛯䜑䚸(1)ᘧ䛻ᇶ䛵䛟䛣䛸䛷݊ሺݐሻ䛾 ᐃ⤖ᯝ䛾䜏䛛䜙≧ែኚ໬ᚋ䛾െߩΤߚୣ୤୤ǡଵ䜢᥎ᐃ䛩䜛䛣䛸 䛜䛷䛝䜛䚹䛺䛚(1)ᘧ䛻䛚䛔䛶䚸㐣Ώኚ໬䛜䝇䝔䝑䝥≧䛷䛒䜛䛸㏆ఝ䛧ݐൎ ݐ䛸䜏䛺䛩䛸

െߩ ߚୣ୤୤ǡଵ

σ ܽ

ߣሺ݊െ ݊

௜ୀଵ

׬ ሺ݊ሺݐሻ െ ݊ ሻ݀ݐ

(2)

䛸䛺䜚䚸TDDIἲ䛿ᚑ᮶䛾✚ศἲ䛻ᖐ╔䛩䜛䛣䛸䛸䛺䜛䚹

TDDIἲ䛾᭷ຠᛶ䜢☜ㄆ䛩䜛䛯䜑䛾ᐇドヨ㦂䛸䛧䛶䚸UTR-KINKI䛾ᮍ⮫⏺⅔ᚰ䛻䛚䛔䛶䚸Pu-

Be୰ᛶᏊ⥺※䛸ไᚚᲬ䜢ྠ᫬䛻᧯స䛩䜛䛣䛸䛻䜘䜚䚸ᮍ⮫⏺ᗘെߩ䛸እ㒊୰ᛶᏊ※ᙉᗘܵ䛜ྠ᫬䛻ኚ

໬䛩䜛ᮍ⮫⏺㐣Ώኚ໬ᐇ㦂䜢ᐇ᪋䛧䛯䚹ไᚚᲬ䛸୰ᛶᏊ※䛾᧯స䝟䝍䞊䞁䛸䛧䛶௨ୗ䛾4䜿䞊䝇䛻䛴 䛔䛶᳨ウ䛧䛯䚹

1. ㄪᩚᲬᘬᢤ䛻䜘䜛ṇ䛾཯ᛂᗘῧຍ䠇䝋䞊䝇䝗䝻䝑䝥䛻䜘䜛୰ᛶᏊ※ᙉᗘቑຍ→ィᩘ⋡ቑຍ 2. ㄪᩚᲬᤄධ䛻䜘䜛㈇䛾཯ᛂᗘῧຍ䠇䝋䞊䝇䝆䝱䞊䜽䛻䜘䜛୰ᛶᏊ※ᙉᗘῶᑡ→ィᩘ⋡ῶᑡ 3. ㄪᩚᲬᘬᢤ䛻䜘䜛ṇ䛾཯ᛂᗘῧຍ䠇䝋䞊䝇䝆䝱䞊䜽䛻䜘䜛୰ᛶᏊ※ᙉᗘῶᑡ→ィᩘ⋡ῶᑡ 4. ㄪᩚᲬᤄධ䛻䜘䜛㈇䛾཯ᛂᗘῧຍ䠇䝋䞊䝇䝗䝻䝑䝥䛻䜘䜛୰ᛶᏊ※ᙉᗘቑຍ→ィᩘ⋡ቑຍ ௨ୖ䛾4䜿䞊䝇䛻䛴䛔䛶䚸୰ᛶᏊ※఩⨨䛚䜘䜃ไᚚᲬ఩⨨䛛䜙༑ศ㞳䜜䛯㯮㖄཯ᑕయ఩⨨䛻㓄⨨䛧 䛯BF3᳨ฟჾ䛻䜘䜚 ᐃ䛥䜜䛯୰ᛶᏊィᩘ⋡䛾᫬㛫ኚ໬݊ሺݐሻ䛻ᑐ䛧䛶䚸ձ୰ᛶᏊ※ቑಸἲ䚸ղ✚ศ ἲ䚸ճTDDIἲ䛻䜘䜚≧ែኚ໬ᚋ䛾䝗䝹༢఩ᮍ⮫⏺ᗘ䛾᥎ᐃ䜢⾜䛳䛯䚹ྛ䜿䞊䝇䛻䛚䛡䜛ᮍ⮫⏺ᗘ䛾 ཧ↷್䛿䚸ṇ䝨䝸䜸䝗ἲ䛚䜘䜃ⴠୗἲ䛻䜘䛳䛶஦๓䛻 ᐃ䛥䜜䛯వ๫཯ᛂᗘ䛚䜘䜃ไᚚᲬ౯್䛛䜙 ồ䜑䛯䚹䛺䛚䚸ձ୰ᛶᏊ※ቑಸἲ䛻䛴䛔䛶䛿䚸వ๫཯ᛂᗘ䛚䜘䜃ไᚚᲬ౯್䛻ᇶ䛵䛔䛶䚸≧ែኚ໬

๓䛾䝗䝹༢఩ᮍ⮫⏺ᗘ䛾ཧ↷್െߩΤߚୣ୤୤ǡ଴䜢ồ䜑䚸െߩΤߚୣ୤୤ǡ଴䛜᪤▱䛷䛒䜛䛸௬ᐃ䛧䛶≧ែኚ໬๓ᚋ 䛾ィᩘ⋡ẚ݊Τ݊䛛䜙≧ែኚ໬ᚋ䛾ᮍ⮫⏺ᗘെߩΤߚୣ୤୤ǡଵ䜢᥎ᐃ䛧䛯䚹ձ䡚ճ䛾ྛᡭἲ䛷᥎ᐃ䛧䛯ᮍ

⮫⏺ᗘ䛾⤫ィㄗᕪ䛻䛴䛔䛶䛿䚸᫬㛫ᖜȟݐ ൌ ͲǤͳ•ẖ䛻 ᐃ䛧䛯୰ᛶᏊィᩘ⋡݊ሺݐሻ䛾⤫ィㄗᕪ䛜䝫䜰 䝋䞁ศᕸ䛻ᚑ䛖䛸㏆ఝ䛧䚸䝷䞁䝎䝮䝃䞁䝥䝸䞁䜾ἲ䛻ᇶ䛵䛟䛣䛸䛷ホ౯䛧䛯䚹

ձ䡚ճ䛾ྛᡭἲ䛷᥎ᐃ䛥䜜䛯≧ែኚ໬ᚋ䛾െߩΤߚୣ୤୤ǡଵ᥎ᐃ⤖ᯝ䜢⾲1䛻ᩚ⌮䛩䜛䚹⾲1䛻䛚䛔䛶䚸

െߩΤߚୣ୤୤ǡଵ䛾⤫ィㄗᕪ䛿䝷䞁䝎䝮䝃䞁䝥䝸䞁䜾ἲ䛻䜘䜚᥎ᐃ䛥䜜䛯ᶆ‽೫ᕪ(ͳߪ)䜢♧䛧䛶䛔䜛䚹⾲1䛛䜙

ศ䛛䜛䜘䛖䛻䚸ձ୰ᛶᏊ※ቑಸἲ䛾ሙྜ䛻䛿䚸≧ែኚ໬๓ᚋ䛻䛚䛡䜛݊Τ݊䛾ቑῶ䛾䜏䛷ᮍ⮫⏺ᗘ 䛾┦ᑐኚ໬䜢᥎ᐃ䛩䜛䛣䛸䛻䛺䜛䛯䜑䚸െߩ䛸ܵ䛜ྠ᫬䛻ኚ໬䛩䜛䜘䛖䛺㐣Ώኚ໬䛾ሙྜ䛻䛿䚸ཧ↷್

䛛䜙䛾ᕪ␗䛜㠀ᖖ䛻኱䛝䛔䚹≉䛻䚸䜿䞊䝇3, 4䛾䜘䛖䛻䚸≧ែ๓ᚋ䛻䛚䛡䜛ィᩘ⋡䛾ቑῶ䛜ᮍ⮫⏺ᗘ 䛾ኚ໬䛸ᑐᛂ䛧䛶䛔䛺䛔ሙྜ䛻䛿䚸≧ែኚ໬ᚋ䛾െߩΤߚୣ୤୤ǡଵ䛾ᐃᛶⓗ䛺ቑῶഴྥ䛷䛥䛘኱䛝䛟ぢㄗ䜛

(3)

䛣䛸䛸䛺䜛䚹୍᪉䚸ղ✚ศἲ䛚䜘䜃ճTDDIἲ䜢⏝䛔䛯ሙྜ䛻䛿䚸݊ሺݐሻ䛾 ᐃ⤖ᯝ䛾䜏䛛䜙ཧ↷್䛻 ẚ㍑ⓗ㏆䛔᥎ᐃ⤖ᯝ䜢ᚓ䜛䛣䛸䛜ྍ⬟䛷䛒䜚䚸䜿䞊䝇3, 4䛻䛴䛔䛶䜒≧ែኚ໬䛾െߩΤߚୣ୤୤ǡଵ䛾ቑῶ䜢 ṇ䛧䛟᥎ᐃ䛷䛝䜛䚹䛥䜙䛻䚸ղ✚ศἲ䛸ճTDDIἲ䜢ẚ㍑䛧䛯ሙྜ䚸ճTDDIἲ䛾䜋䛖䛜䜘䜚ཧ↷್䛻㏆

䛔െߩΤߚୣ୤୤ǡଵ䜢᥎ᐃྍ⬟䛷䛒䜛䛣䛸䛜ศ䛛䜛䚹䛣䛾⌮⏤䛿䚸ㄪᩚᲬ䛾ᤄධ䛚䜘䜃ᘬᢤ䛻⣙30 [s]䛾᫬㛫

䜢せ䛧䛶䛚䜚䚸ղ✚ศἲ䛻䛚䛡䜛௬ᐃ䛂䝇䝔䝑䝥≧䛾≧ែኚ໬䛃䛜㐺ษ䛷䛿䛺䛔䛯䜑䛷䛒䜛䚹ճTDDI ἲ䛾ሙྜ䛻䛿䚸ݐ൑ ݐ ൑ ݐ䛾᫬㛫⠊ᅖ䛻䜟䛯䛳䛶≧ែኚ໬䛜㉳䛣䛳䛯䛸䛧䛶䜒䚸(1)ᘧ䛷♧䛧䛯䜘䛖䛻 ݐǡ ݐ䛾ຠᯝ䜢⪃៖䛩䜛䛣䛸䛜䛷䛝䚸䝇䝔䝑䝥≧௨እ䛾௵ព䛾≧ែኚ໬䛻ᑐ䛧䛶䜒䜘䜚㐺ษ䛻െߩΤߚୣ୤୤ǡଵ 䜢᥎ᐃ䛷䛝䛯䛸⪃䛘䜙䜜䜛䚹䛯䛰䛧䚸ճTDDIἲ䛾ሙྜ䛻䛿䚸㐣Ώኚ໬䛻せ䛩䜛᫬㛫㛫㝸ሺݐെ ݐሻ䛜 㛗䛟䛺䜛䛻䛴䜜䛶䚸(1)ᘧ䛻䛚䛡䜛ྑ㎶ศẕ䛾✚ศ್׬ ሺ݊ሺݐሻ െ ݊ ሻ݀ݐ

䛜ᑠ䛥䛟䛺䜚䝊䝻䛻㏆䛵䛟䛯䜑䚸

୰ᛶᏊィᩘ䛾⤫ィㄗᕪ䛾ᙳ㡪䛜኱䛝䛟䛺䜚䚸െߩΤߚୣ୤୤ǡଵ䛾⤫ィㄗᕪ䜒኱䛝䛟䛺䜛Ⅼ䛻ὀព䛜ᚲせ䛷䛒 䜛䚹䛩䛺䜟䛱䚸ճTDDIἲ䛻䛚䛔䛶≧ែኚ໬ᚋ䛾᫬้ݐ䛿௵ព䛻タᐃ䛩䜛䛣䛸䛜ྍ⬟䛷䛒䜛䛜䚸

െߩΤߚୣ୤୤ǡଵ䛾⤫ィㄗᕪ䜢ᑠ䛥䛟䛩䜛䛯䜑䛻䛿䚸ᐇ㝿䛾≧ែኚ໬⤊஢᫬้䛻䛷䛝䜛㝈䜚㏆䛟䛺䜛䜘䛖䛻タ

ᐃ䛩䜛䛣䛸䛜㔜せ䛸䛺䜛䚹

௨ୖ䜘䜚䚸UTR-KINKI䛻䛚䛡䜛ไᚚᲬ䛚䜘䜃୰ᛶᏊ※䛾ྠ᫬᧯స䛻䜘䜛ᮍ⮫⏺㐣Ώኚ໬ᐇ㦂䜢

㏻䛨䛶䚸TDDIἲ䛾᭷ຠᛶ䜢ᐇド䛩䜛䛣䛸䛜䛷䛝䛯䚹

⾲1㻌 ྛ ᐃᡭἲ䛻䜘䜛≧ែኚ໬ᚋ䛾െߩΤߚୣ୤୤ǡଵ᥎ᐃ⤖ᯝ

Case ཧ↷್ [$] ձ୰ᛶᏊ※ቑಸἲ [$] ղ✚ศἲ [$] ճTDDIἲ [$]

1 0.463 0.00948 ± 0.00004 0.395 ± 0.002 0.447 ± 0.004 2 0.638 83.9 ± 1.3 0.566 ± 0.002 0.660 ± 0.004 3 0.463 37.3 ± 0.4 0.512 ± 0.002 0.494 ± 0.003 4 0.638 0.0443 ± 0.0002 0.83 ± 0.02 0.74 ± 0.04

䠏䠏䠊୕ḟ୰ᛶᏊ┦㛵ἲ

䜎䛪䚸୕ḟ୰ᛶᏊ┦㛵ἲ䛻䛴䛔䛶ᴫせ䜢㏙䜉䜛䚹ᐃᖖ≧ែ䛻䛚䛡䜛እ㒊୰ᛶᏊ※᭷䜚䛾ᮍ⮫⏺య

⣔䛻䛚䛔䛶䚸䛒䜛᫬㛫ᖜܶ䛤䛸䛻୰ᛶᏊ䜢㐃⥆ⓗ䛻 ᐃ䛧⥆䛡䚸୰ᛶᏊ᳨ฟᩘܥሺܶሻ䛾᫬⣔ิ䝕䞊䝍 䠄⅔㞧㡢䠅䜢ィ 䛧䛯䛸䛩䜛䚹ᚓ䜙䜜䛯ܥሺܶሻ䛻䛴䛔䛶ᖹᆒ䚸஧ḟ䝰䞊䝯䞁䝖䚸୕ḟ䝰䞊䝯䞁䝖䜢ồ䜑䚸௨

ୗ䛾ᐃ⩏ᘧ䛻ᇶ䛵䛔䛶䚸஧ḟ୰ᛶᏊ┦㛵㔞್ܻ䛚䜘䜃୕ḟ୰ᛶᏊ┦㛵㔞್ࣳ䜢ホ౯䛩䜛䚹

ܻ ؠۃሺܥ െ ۃܥۄሻۄ

ۃܥۄ െ ͳ ൌۃܥሺܥ െ ͳሻۄ െ ۃܥۄ

ۃܥۄ ǡ (3)

ؠ ቆۃሺܥ െ ۃܥۄሻۄ

ۃܥۄ െ ͳቇ െ ͵ ቆۃሺܥ െ ۃܥۄሻۄ ۃܥۄ െ ͳቇ

ൌۃܥሺܥ െ ͳሻሺܥ െ ʹሻۄ െ ͵ۃܥሺܥ െ ͳሻۄۃܥۄ ൅ ʹۃܥۄ

ۃܥۄ ǡ

(4)

(3), (4)ᘧ䛻䛚䛔䛶䝤䝷䜿䝑䝖ۃۄ䛿ᮇᚅ್䜢ព࿡䛩䜛䚹ẚ㍑ⓗὸ䛔ᮍ⮫⏺య⣔䜢⪃䛘䛯ሙྜ䛻䛿䚸ᇶ ᮏ䝰䞊䝗ᡂศ䛜ᨭ㓄ⓗ䛷䛒䜛䛸㏆ఝ䛩䜛䛣䛸䛜䛷䛝䚸᳨ฟ᫬㛫ᖜܶ ՜ λ䛾ᴟ㝈䛻䛚䛔䛶୰ᛶᏊ┦㛵 㔞䛾ẚࣳଷǡஶΤܻ䛾್䛿䚸⮫⏺≧ែ䛻䛚䛡䜛ᅛ᭷䛾⤌䜏ྜ䜟䛫ᩘ䛂3䛃䛻ẚ㍑ⓗ㏆䛔್䛸䛺䜛䚹

ଷǡஶ

ܻ ൌ Ž‹

்՜ஶ

ିఘاଵ

ଷǡஶሺܶሻ

൫ܻሺܶሻ൯ ൎ ͵ ൅ ሺെߩሻܭǤ (5)

(4)

䛣䛣䛷ܭ䛿䚸᰾ศ⿣⋡䛚䜘䜃እ㒊୰ᛶᏊ※ᙉᗘ䛾✵㛫ศᕸ䜔᳨ฟჾ䛾୙ឤ᫬㛫߬䛺䛹䛻౫Ꮡ䛧䛯  ᐃᑐ㇟య⣔ᅛ᭷䛾ᐃᩘ䛷䛒䜚䚸䜸䞊䝎䞊䛸䛧䛶䛿ܭ ൎ ͳ䛷䛒䜛䚹ᚑ䛳䛶䚸୰ᛶᏊ┦㛵㔞䛾ẚࣳଷǡஶΤܻ 䛾䛂3䛃䛛䜙䛾ᕪ␗หࣳଷǡஶΤܻെ ͵ห䜢ㄪ䜉䜛䛣䛸䛷䚸ᮍ⮫⏺ᗘሺെߩሻ䛾䜸䞊䝎䞊䜢ᴫ⟬䛩䜛䛣䛸䛜䛷䛝䜛䚹 ゝ䛔᥮䛘䜛䛸䚸⮫⏺≧ែ䛻㏆䛟䛺䜛䜋䛹䚸ࣳଷǡஶΤܻ䛾್䛜⮫⏺≧ែ䛻䛚䛡䜛ᅛ᭷䛾⤌䜏ྜ䜟䛫ᩘ䛂3䛃 䛻䜘䜚㏆䛵䛟䛣䛸䛻䛺䜛䚹

UTR-KINKI䛻䛚䛔䛶୕ḟ୰ᛶᏊ┦㛵ἲ䛾ᐇ㦂䜢⾜䛖䛯䜑䚸೵Ṇ᫬䛾ᮍ⮫⏺⅔ᚰ(݇ୣ୤୤ൎ ͲǤͻͺ)䛻

䛚䛔䛶⅔㞧㡢 ᐃ䜢ᐇ᪋䛧䛯䚹೵Ṇ᫬䛾≧ែ䛷䛿䚸⅔ෆ䛻Pu-Be୰ᛶᏊ⥺※䛺䛹䛾እ㒊୰ᛶᏊ※䛿

୍ษ⿦Ⲵ䛥䜜䛶䛔䛺䛔䚹䛧䛛䛧䚸UTR-KINKI䛾⇞ᩱᯈ䛿U-Alྜ㔠䛷䛒䜚䚸䜴䝷䞁ྠ఩య(≉䛻234U) 䛾ߙᔂቯ䛻䜘䜚Ⓨ⏕䛧䛯ߙ⥺䛸27Al䛜ሺߙǡ ሻ཯ᛂ䜢㉳䛣䛩䛣䛸䛻䜘䛳䛶䚸⇞ᩱෆ䛻ᅛ᭷୰ᛶᏊ※䛜Ꮡᅾ 䛩䜛≧ἣ䛸䛺䛳䛶䛔䜛䚹ᚑ䛳䛶䚸೵Ṇ᫬䛾ᮍ⮫⏺⅔ᚰ䛻䛚䛔䛶䜒䚸ᅛ᭷୰ᛶᏊ※䛻㉳ᅉ䛧䛯ᮍ⮫⏺ቑ ಸ䛜⏕䛨䛶䛚䜚䚸⅔ෆ䛻୰ᛶᏊ᳨ฟჾ䜢㓄⨨䛩䜛䛣䛸䛷పィᩘ⋡䛷䛿䛒䜛䜒䛾䛾୰ᛶᏊ᳨ฟᩘ䛾᫬

⣔ิ䝕䞊䝍䜢 ᐃ䛩䜛䛣䛸䛜䛷䛝䜛䚹ᮏᐇ㦂䛷䛿䚸䛷䛝䜛㝈䜚ィᩘ⋡䜢኱䛝䛟䛷䛝䜛䜘䛖⅔ᚰ୰ኸ䛻BF3

䛾᳨ฟჾ䜢㓄⨨䛧䠄ィᩘ⋡䛿⣙39cps䠅䚸㐠㌿೵Ṇ୰䛾ᮇ㛫䜢᭷ຠά⏝䛩䜛䛣䛸䛻䜘䜚䚸15.8᫬㛫䛻䜟 䛯䜛㛗᫬㛫䛾⅔㞧㡢 ᐃ䜢ᐇ᪋䛧䛯䚹ᚓ䜙䜜䛯୰ᛶᏊ᳨ฟᩘ䛾᫬⣔ิ䝕䞊䝍䛻ᑐ䛧䛶䚸bootstrapἲ 䛚䜘䜃෌ᖐ䝞䞁䝏䞁䜾ἲ䜢฼⏝䛩䜛䛣䛸䛷䚸୰ᛶᏊ┦㛵㔞䛾ẚࣳሺܶሻ ܻΤ ሺܶሻ䛚䜘䜃䛭䛾⤫ィㄗᕪ䜢 ศᯒ䛧䛯䚹

ᅗ1㻌 ᳨ฟ᫬㛫ᖜܶ䛻ᑐ䛩䜛ࣳଷǡஶΤܻ䛾ኚ໬

೵Ṇ᫬䛾UTR-KINKI䛻䛚䛔䛶 ᐃ䛥䜜䛯⅔㞧㡢 ᐃ⤖ᯝ䛻ᑐ䛧䛶䚸᳨ฟ᫬㛫ᖜܶ䛻ᑐ䛩䜛୰ᛶ Ꮚ┦㛵㔞䛾ẚࣳሺܶሻ ܻΤ ሺܶሻ䛾ኚ໬䜢ᅗ1䛻♧䛩䚹ᅗ1䛻䛚䛔䛶䚸䜶䝷䞊䝞䞊䛿bootstrapἲ䛻䜘䜚᥎ ᐃ䛧䛯ࣳሺܶሻ ܻΤ ሺܶሻ䛾95%ಙ㢗༊㛫䜢⾲䛧䛶䛔䜛䚹ᅗ1䛛䜙ศ䛛䜛䜘䛖䛻䚸᳨ฟ᫬㛫ᖜܶ䛜኱䛝䛟䛺䜛䛻 䛴䜜䛶䚸㣬࿴್ࣳଷǡஶΤܻ䛜⮫⏺≧ែ䛻䛚䛡䜛ᅛ᭷䛾⤌䜏ྜ䜟䛫ᩘ䛂3䛃㏆ഐ䛻཰᮰䛩䜛䛣䛸䛜☜ㄆ䛷 䛝䛯䚹㐣ཤ䛻ᡃ䚻䛾◊✲䜾䝹䞊䝥䛷ᐇ᪋䛧䛯䚸᰾⇞ᩱ䜢୍ษྵ䜎䛺䛔㠀ቑಸయ⣔䛻䛚䛡䜛୕ḟ୰ᛶ Ꮚ┦㛵ἲ䛾ᐇ㦂⤖ᯝ3䛷䛿䚸ࣳଷǡஶΤܻ䛜䛂3䛃䛸䛿᭷ព䛻␗䛺䜛್䛷䛒䛳䛯䛯䜑䚸೵Ṇ᫬䛾UTR- KINKI䛻䛚䛡䜛୕ḟ୰ᛶᏊ┦㛵ἲ䛾⤖ᯝ䛿䚸⅔ෆ䛻䛚䛔䛶ᮍ⮫⏺ቑಸ䛻䜘䜛᰾ศ⿣㐃㙐཯ᛂ䛜⏕

䛨䛶䛔䜛䛣䛸䜢ព࿡䛧䛶䛔䜛䚹䛣䛣䛷䚸೵Ṇ᫬䛾UTR-KINKI䛾ᮍ⮫⏺ᗘ䛿⣙2Ψȟ݇ ݇Τ 䛾䜸䞊䝎䞊䛸ẚ

㍑ⓗὸ䛔䛯䜑䚸ࣳଷǡஶΤܻ䛾䛂3䛃䛛䜙䛾ᕪ␗หࣳଷǡஶΤܻെ ͵ห䛾䜸䞊䝎䞊䛸䛧䛶䛿0.02⛬ᗘ䛸䛺䜛䛣䛸䛜ᮇ ᚅ䛥䜜䛯䚹䛧䛛䛧䚸ᮏᐇ㦂䛷ᐇ᪋䛧䛯15.8᫬㛫䛾⅔㞧㡢 ᐃ䛷ᚓ䜙䜜䛯ࣳଷǡஶΤܻ䛾⤫ィㄗᕪ䛿ሺെߩሻ

2.0 2.4 2.8 3.2

0.001 0.01 0.1 1

[s]

[-]

3

(5)

䛾䜸䞊䝎䞊䛸ẚ䜉䛶኱䛝䛟䚸⣙2Ψȟ݇ ݇Τ 䛾ὸ䛔ᮍ⮫⏺య⣔䛻䛚䛔䛶䛿ࣳଷǡஶΤܻ䛾䛂3䛃䛛䜙䛾⤫ィⓗ᭷

ព䛻᳨▱䛩䜛䛣䛸䛿䛷䛝䛺䛛䛳䛯䚹ࣳଷǡஶΤܻ䛾䛂3䛃䛛䜙䛾᭷ព䛺ᕪ䜢 ᐃ䛷䛝䜛䜘䛖䛺ᐇ㦂᪉ἲ䛾ᨵၿ

⟇䛸䛧䛶䛿䚸䛥䜙䛻㛗᫬㛫䠄౛䛘䜀1䞄᭶䜸䞊䝎䞊䛾⅔೵Ṇ᫬≧ែ䠅䛾⅔㞧㡢 ᐃ䜢ᐇ᪋䛩䜛䛛䚸䛒䜛 䛔䛿ᑡ䛺䛔⇞ᩱᯈᯛᩘ䛾῝䛔ᮍ⮫⏺య⣔䠄౛䛘䜀ሺെߩሻ ൏ ͳͲ Ψȟ݇ ݇Τ 䠅䛻䛚䛔䛶୕ḟ୰ᛶᏊ┦㛵ἲ ᐇ㦂䜢ᐇ᪋䛩䜛䛣䛸䛜ᣲ䛢䜙䜜䜛䚹

ᴗᴗ⦼୍ぴ 䠷䠷Ꮫ⾡ㄽᩥ䠹

1. T. Endo, A. Nonaka, S. Imai, A. Yamamoto, A. Sakon, K. Hashimoto, “Subcriticality measurement using time-domain decomposition-based integral method for simultaneous reactivity and source changes,” J. Nucl. Sci. Technol., 57(5), pp. 607–616 (2020), DOI: 10.1080/00223131.2019.1706658

䠷䠷ᅜ㝿఍㆟䝥䝻䝅䞊䝕䜱䞁䜾䠹

2. T. Endo, S. Imai, K. Watanabe, A. Yamamoto, A. Sakon, K. Hashimoto, M. Yamanaka, C.H. Pyeon, “Experiment of unique combination number due to the third-order neutron- correlation,” Proc. PHYSOR2020, Cambridge, United Kingdom, Mar. 29–Apr. 2, 2020.

䠷䠷ᅜෆ఍㆟䠹

3. 㐲⸨ ▱ᘯ, ௒஭ 㡴, Ώ㎶ ㈼୍, ᒣᮏ ❶ኵ, “㠀ቑಸయ⣔䛷䛾୕ḟ୰ᛶᏊ┦㛵ἲᐇ㦂,” ᪥ ᮏཎᏊຊᏛ఍2019ᖺ⛅䛾኱఍, 2J10, 2019ᖺ9᭶11᪥䡚13᪥, ᐩᒣ኱Ꮫ஬⚟䜻䝱䞁䝟䝇.

ᐇᐇ㦂䞉 ᐃ⿵ຓ⪅

㻌 㻌 㻌 㔝୰㻌 ᮅ᪥ ྡྂᒇ኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲⛉㻌 ༤ኈ๓ᮇㄢ⛬2ᖺ 㻌 㻌 㻌 ௒஭㻌 㡴 ྡྂᒇ኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲⛉㻌 ༤ኈ๓ᮇㄢ⛬2ᖺ

㻌 㻌 䠄ィ㻌 㻌2ྡ䠅

参照

関連したドキュメント

ㄢ㢟䛷䛒䜛䚹 E.. The correlation between the change of distal motor latency of the median nerve and the abundant A-waves in Guillain-Barré syndrome.. The correlation between

䠎ḟඖ䜲䞁䝔䞊䜽 䜽䝷䝇䝍ᆺ 䠄⬗⬥㓄⨨䠅 䝁䞁䝁䝹䝗 䝻䝑䜽䜴䜵䝹 㻮㻙㻝 䠄㻭ᆺ䠅 䝒䝫䝺䝣 㼀㼡㻙㻝㻢㻜.

* Faculty of Law, Kyoto Sangyo University Kamigamo Motoyama, Kitaku, Kyoto city, Kyoto, 603-8555 Japan. ** Faculty of Law, Kyoto Sangyo University Kamigamo Motoyama, Kitaku,

* Faculty of Law, Kyoto Sangyo University Kamigamo Motoyama, Kitaku, Kyoto city, Kyoto, 603-8555 Japan. ** Faculty of Law, Kyoto Sangyo University Kamigamo Motoyama, Kitaku,

[r]

㻙㻡㻚㻜㼤㻝㻜 㻙㻤 㻜㻚㻜 㻡㻚㻜㼤㻝㻜 㻙㻤 㻝㻚㻜㼤㻝㻜 㻙㻣 㻝㻚㻡㼤㻝㻜 㻙㻣 㻞㻚㻜㼤㻝㻜 㻙㻣 㻞㻚㻡㼤㻝㻜 㻙㻣 㻟㻚㻜㼤㻝㻜 㻙㻣 㻟㻚㻡㼤㻝㻜 㻙㻣 㻠㻚㻜㼤㻝㻜

[r]

⬊䜢ᅇ཰䛧䚸25 cm 2 䝣䝷䝇䝁䛻 10 4 ಶ䛪䛴᧛✀䛧䚸1 ᪥ᇵ㣴䛩䜛䚹䛭䛾ᚋ䚸䝖䝸䝥䝅䝘䜲䝈䛷䝬䜲䜽䝻䝏 䝳䞊䝤䛻⣽⬊䝨䝺䝑䝖≧ែ䛷ᅇ཰䛧䚸㏆␥኱ᏛཎᏊ⅔䛻䛶୰ᛶᏊ⥺↷ᑕ䜢⾜䛳䛯䚹↷ᑕ⥺㔞䛿 0䚸0.3䚸