ᩍ㸸ዟすࡳࡉࡁ㻌

ຓ ᩍ㸸⚟⃝ᏹᐉ

≉௵ ຓᩍ㸸 Xiaojing Liu

⏘Ꮫᐁ㐃ᦠ◊✲ဨ㸸ᮏᮧᖾ἞

኱Ꮫ 㝔⏕㸸ᆏ஭೺ኴ㑻㸦'࣭኱ෆᏕ㞝㸦0㸧࣭ᒣ⏣⥤Ꮚ㸦0㸧 ᐈဨ◊✲ဨ㸸 Dejun Ding (1-2 ᭶ ) ࣭ Lutz Faucar (2-4 ᭶ ) ࣭᪂಴ᘯ㐨 (4-12 ᭶ )

஺᥮␃Ꮫ⏕㸸 Chuncheng Wang 㸦 1-8 ᭶㸧࣭ Kim Vizins 㸦 1-8 ᭶㸧

㻌

ᮏ◊✲ศ㔝࡛ࡣࠊᏙ❧ཎᏊศᏊ࡟࠾ࡅࡿ㔞Ꮚ㐣⛬ࡢゎᯒ࡜ไᚚ࡟㛵ࡍࡿ◊✲άືࢆ⾜ࡗ࡚࠸ࡿࠋ㻌 㻞㻜㻜㻥ᖺࡢ◊✲άືࢆᢤ⢋ࡋ࡚௨ୗ࡟⤂௓ࡍࡿࠋ㻌

㻌

㸯㸬࣮ࣞࢨ࣮ບ㉳㟁Ꮚ෌ᩓ஘࡟⌧ࢀࡿ㓟⣲ศᏊࡢࣖࣥࢢࡢ㸰㔜ࢫࣜࢵࢺᖸ΅

≀㉁ࡢᵓ㐀ࢆỴᐃࡍࡿࡓࡵ࡟ࠊཎᏊ㛫㊥㞳࡜ྠ⛬ᗘࡢἼ㛗ࡢ༢Ⰽ㹖⥺ࢆ⏝࠸ࡓX⥺ᅇᢡࡀࡼࡃ⏝࠸ࡽ

ࢀࡿࠋ㏆ᖺࠊᵓ㐀ኚ໬࣭┦㌿⛣ࢆ㉳ࡇࡋࡘࡘ࠶ࡿ⣔ࡢX⥺ᅇᢡ᫬ศ๭ ᐃ࡟ከ኱࡞㛵ᚰࡀᐤࡏࡽࢀ࡚࠸

ࡿࠋᡃࠎࡣࠊX⥺ࡢ௦ࢃࡾ࡟ࠊ㧗ᙉᗘࡢ࣮ࣞࢨ࣮࡛ㄏ㉳ࡋࡓ෌⾪✺㟁Ꮚࢆ⏝࠸ࡓ㟁Ꮚᩓ஘ᐇ㦂ࢆ⾜࠺ࡇ

࡜࡛ࠊศᏊࡢᵓ㐀ኚ໬ࢆࣇ࢙࣒ࢺ⛊ࡢ᫬㛫ࢫࢣ࣮࡛ࣝᤊ࠼ࡿࡇ࡜ࢆ┠ᶆ࡟◊✲ࢆ⾜ࡗ࡚࠸ࡿࠋ 㓟⣲ศᏊࡣࠊHOMO㌶㐨(Jࡢᑐ⛠ᛶ࠿ࡽࠊ┤⥺೫ගࡋࡓᙉ࠸࣮ࣞࢨ࣮ሙ୰࡛ࡣࠊගࡢ೫ග᪉ྥࡀ୺

࡟ศᏊ㍈࡟ᑐࡋ࡚45᪉ྥ࡟ྥ࠸ࡓሙྜ࡟ᙉࡃ࢖࢜ࣥ໬ࡉࢀࡿࠋࡋࡓࡀࡗ࡚ࠊศᏊࡀ✵㛫࡟ᑐࡋ࡚ࣛࣥ

ࢲ࣒࡟㓄ྥࡋ࡚࠸ࡿሙྜ࡛ࡶࠊ㸰ಶࡢ㓟⣲ཎᏊ࡟ࡼࡿ㟁Ꮚ ᩓ஘࡟ᖸ΅ࡢほ ࡀᮇᚅ࡛ࡁࡿࠋᡃࠎࡣ᭱㏆ࣃࣝࢫᖜ100ࣇ

࢙ ࣒ ࢺ ⛊ ࠊ Ἴ 㛗800nmࡢ ࣞ ࣮ ࢨ ࣮ ࢆ ⏝ ࠸ ࡚ ࠊ ᙉ ᗘ ࡀ 7x10¹³Wcm^-2௜㏆࡛ࡢ㓟⣲ศᏊࡢゅᗘศゎ෌ᩓ஘㟁Ꮚࢫ࣌ࢡ ࢺࣝࡢᚋ᪉ᩓ஘ᡂศ࡟┦ẅⓗ࡞ᖸ΅࡟ࡼࡿᙉᗘࡢῶᑡࢆほ

 ࡋࡓ[1.1]ࠋ௒ᅇࡼࡾ▷ࣃࣝࢫࡢ࣮ࣞࢨ࣮ගࢆ⏝࠸࡚࢖࢜

ࣥ໬ࡢ㣬࿴ࢆᢲࡉ࠼ࡿࡇ࡜࡟ࡼࡾࠊࡼࡾ㧗࠸ගᙉᗘ࡛ࡢ㟁 Ꮚᩓ஘࡟࠾ࡅࡿ┦ẅⓗ࡞ᖸ΅ࢆほ ࡍࡿࡇ࡜࡟ᡂຌࡋࡓࠋ ྑᅗࡣ㸰ࡘࡢ␗࡞ࡿᙉᗘ࡛ ᐃࡋࡓ㓟⣲ศᏊࡢ෌ᩓ஘㟁 Ꮚࡢ㸰ḟඖ㐠ື㔞ศᕸ࡛࠶ࡿࠋୖᅗࡀࣃࣝࢫᖜ10 fsec ᙉᗘ 1x10¹⁵W cm^-2ࠊୗᅗࡀࣃࣝࢫᖜ30 fsec ᙉᗘ4x10¹⁴W cm^-2࡛  ᐃࡋࡓ⤖ᯝ࡛࠶ࡾࠊୖᅗࡢ᭱ࡶ㐠ື㔞ࡢ㧗࠸㡿ᇦ࡟࣮ࣞࢨ

࣮ࡢ೫ග᪉ྥ(z-᪉ྥ)࡛ࡢ㟁Ꮚᙉᗘࡢ❑ࡳࡀほ ࡉࢀࡿࠋࡇ ࡢ❑ࡳࡀ㸰ࡘࡢ㓟⣲ཎᏊ࡟ࡼࡗ࡚ᩓ஘ࡉࢀࡓ㟁ᏊἼࡢ┦ẅ

ⓗᖸ΅࡟ࡼࡿࡶࡢ࡜⪃࠼ࡽࢀࡿࠋ୍᪉ୗᅗ࡛ࡣࡇࡢ❑ࡳࡣ ほ ࡉࢀ࡞࠸ࠋ㟁Ꮚࡢ෌⾪✺࢚ࢿࣝࢠ࣮ࡣ࣮ࣞࢨ࣮ᙉᗘ࡟

ẚ౛ࡍࡿࡢ࡛ࠊࡇࡢ⌧㇟ࡣ෌⾪✺㟁Ꮚࡢ㐠ື㔞ࡢ್࡟ᛂࡌ

࡚ࠊ┦ẅⓗ࡞ᖸ΅࡜┦ຍⓗ࡞ᖸ΅ࡀ஺஫࡟ኚ໬ࡋ࡚࠸ࡃࡇ

࡜࡟⏤᮶ࡋ࡚࠸ࡿࠋ௨๓⾜ࡗࡓ100fsࡢ࣮ࣞࢨ࣮࡛ࡢࡼࡾᙅ

࠸ᙉᗘ࡛ࡢ┦ẅⓗᖸ΅ࡢ⤖ᯝ[1.1]࡜ేࡏ࡚ࠊᡃࠎࡣ㟁Ꮚ㐠

ື㔞࡟ࡼࡿᖸ΅ࣃࢱ࣮ࣥࡢኚ໬ࡢ1࿘ᮇࢆᤊ࠼ࡿࡇ࡜࡟ᡂ

ຌࡋࡓ࡜࠸࠼ࡿ [1.2]ࠋ

[1.1] M. Okunishi et al. Phys. Rev. Lett. 103, 043001 (2009).

[1.2] M. Okunishi et al. to be submitted.

㸰

㸰㸬ᙉගᏊሙ୰࡛ࡢศᏊࡢ࢖࢜ࣥ໬࡟࠾ࡅࡿẁ㝵ⓗ࠾ࡼࡧ㠀ẁ㝵ⓗ2㔜࢖࢜ࣥ໬㐣⛬

ศᏊࡢග2㔜࢖࢜ࣥ໬㐣⛬ࡣࠊ㏻ᖖࡣࠊ࢚ࢿࣝࢠ࣮ࡢ㧗࠸EUVࡸ㌾X⥺㡿ᇦࡢග྾཰࡟ࡼࡗ࡚㉳ࡇࡿ

㐣⛬࡛࠶ࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊศᏊ࡟㧗ᙉᗘ࣭▷ࣃࣝࢫࡢ࣮ࣞࢨ࣮ගࢆ㞟ගࡍࡿ࡜࢚ࢿࣝࢠ࣮ࡢᑠࡉ࡞

㉥እ࣭ྍど㡿ᇦࡢග࡛࠶ࡗ࡚ࡶࠊᐜ᫆࡟㸰㔜࢖࢜ࣥ໬㐣⛬ࡀほ ࡉࢀࡿࠋࡇࡢ2㔜࢖࢜ࣥ໬㐣⛬࡟ࡣḟ ࡢ2✀㢮ࡢᶵᵓࡀ⪃࠼ࡽࢀ࡚࠸ࡿࠋ(i)ẁ㝵ⓗ2㔜࢖࢜ࣥ໬㸸୍ࡘࡢ࣮ࣞࢨ࣮ࣃࣝࢫෆ࡟ศᏊࡢ࢖࢜ࣥ໬

࡜ࡑࢀ࡟ࡼࡗ࡚⏕ᡂࡋࡓศᏊ࢖࢜ࣥࡢ࢖࢜ࣥ໬ࡀᘬࡁ⥆࠸࡚㉳ࡇࡿ⌧㇟ࠋ(ii)㠀ẁ㝵ⓗ࢖࢜ࣥ໬㸸࢖࢜

ࣥ໬࡟ࡼࡗ࡚ᨺฟࡉࢀࡓ㟁Ꮚࡀࡑࡢ㟁ᏊࢆᨺฟࡋࡓศᏊ࢖࢜ࣥ࡟෌⾪✺ࢆ㉳ࡇࡋ࡚㸰౯࢖࢜ࣥࡀ⏕ᡂ ࡉࢀࡿᶵᵓࠋࡇࡢෆࠊ㧗࠸࣮ࣞࢨ࣮ᙉᗘୗ࡛ࡣ(i)ࡢᶵᵓࡀ୺࡟㉳ࡇࡿࡢ࡟ᑐࡋ࡚ࠊ2㔜࢖࢜ࣥ໬㜈್௜

㏆ࡢ࣮ࣞࢨ࣮ᙉᗘ࡛ࡣࠊ(ii)ࡢ㐣⛬ࡀᙉࡃ⌧ࢀࡿྍ⬟ᛶࡀ࠶ࡿ࡜ࡉࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊࢧ࢖ࢬࡢᑠ ࡉ࡞2✀㢮ࡢศᏊ(CO2࠾ࡼࡧHCOOH)ࡢᙉගᏊሙ୰࡛ࡢග2㔜࢖࢜ࣥ໬㐣⛬࡟ࡘ࠸࡚ࠊࣃࣝࢫᖜ100fs Ἴ

㛗800nm ࡢ࣮ࣞࢨ࣮ࣃࣝࢫࢆ⏝࠸࡚ࠊ⏕ᡂࡍࡿ2౯࢖࢜ࣥ࠾ࡼࡧ2౯࢖࢜ࣥ࠿ࡽゎ㞳ࡋ࡚⏕ᡂࡋࡓ࢖࢜

ࣥᑐࢆほ ࡍࡿࡇ࡜࡛ࠊࡑࡢ⏕ᡂᶵᵓ࡟ࡘ࠸࡚ࡢ⪃ᐹࢆ⾜ࡗࡓࠋࡑࡢ⤖ᯝࠊ2㔜࢖࢜ࣥ໬㜈ᙉᗘ௜㏆࡛

ࡣࠊCO2ศᏊࡣ㠀ẁ㝵ⓗ2㔜࢖࢜ࣥ໬ࡀ୺㐣⛬࡛࠶ࡿ[2.1]ࡢ࡟ᑐࡋࠊHCOOHศᏊ࡛ࡣ᪤࡟㜈ᙉᗘ௜㏆࡛

ẁ㝵ⓗ2㔜࢖࢜ࣥ໬ࡀ୺࡟㉳ࡇࡗ࡚࠸ࡿࡇ࡜ࡀุࡗࡓ [2.2]ࠋ

ྑᅗࡣHCOOHศᏊ࡟90TWcm^-2ࡢᙉᗘࡢ࣮ࣞࢨ࣮ග

ࢆ㞟ගࡋࡓ࡜ࡁ࡟2㔜࢖࢜ࣥ໬࡟ࡼࡗ࡚⏕ᡂࡋࡓ2౯࢖

࢜ࣥ࠿ࡽゎ㞳ࡋࡓ࢖࢜ࣥᑐ(CO(H)⁺ + O(H)⁺)ࡢ࢖࣭࢜ࣥ

࢖࢜ࣥྠ᫬ィ ࣐ࢵࣉ࡛࠶ࡿࠋᡃࠎࡣࡇࡢྠ᫬ィ ἲ࡟

ࡼࡗ࡚2㔜࢖࢜ࣥ໬⏕ᡂ≀࡛࠶ࡿ࢖࢜ࣥᑐࢆ2㔜࢖࢜ࣥ

໬㜈್௜㏆࡛┤⥺೫ග࠾ࡼࡧ෇೫ගࡢ࣮ࣞࢨ࣮ගࢆ⏝

࠸࡚ ᐃࡋࠊࡑࡢ㐪࠸ࢆẚ㍑ࡋࡓࠋࡑࡢ⤖ᯝࡇࡢศᏊ࡛

ࡣ෇೫ග࡜┤⥺೫ගୗ࡛࡯ࡰྠᵝࡢ㐠ື࢚ࢿࣝࢠ࣮ࢆ

ᣢࡘࠊ2౯࢖࢜ࣥ⏕ᡂࡀ㉳ࡇࡗ࡚࠸ࡿࡇ࡜࠿ࡽࠊ(ii)ࡢ෌

⾪✺࡟ࡼࡿ㠀ẁ㝵ⓗ2㔜࢖࢜ࣥ໬㐣⛬࡛ࡣ࡞ࡃࠊ(i)ࡢẁ 㝵ⓗ࢖࢜ࣥ໬㐣⛬ࡀ2㔜࢖࢜ࣥ໬㜈ᙉᗘ௜㏆࡛ࡶ୺࡟㉳

ࡇࡗ࡚࠸ࡿࡇ࡜ࡀุࡿࠋ

ྠᵝࡢᐇ㦂ࢆCO2ศᏊ࡟ࡘ࠸࡚ࡶ⾜ࡗࡓ࡜ࡇࢁ෇೫ග

ୗ࡛ࡣ඲ࡃࢩࢢࢼࣝࡀほ ࡉࢀࡎࠊ┤⥺೫ග࡛ࡢࡳ㸰㔜࢖࢜ࣥ໬㐣⛬ࡀほ ࡉࢀࡓࠋᚑࡗ࡚ࠊCO2ศᏊ

࡛ࡣ㸰㔜࢖࢜ࣥ໬㜈ᙉᗘ௜㏆࡛ࡣ(ii)ࡢ㠀ẁ㝵ⓗ2㔜࢖

࢜ࣥ໬ࡀ୺࡟㉳ࡇࡗ࡚࠸ࡿࡇ࡜ࡀุࡿࠋࡲࡓྑᅗࡣ CO2ศᏊࡢ2㔜࢖࢜ࣥ໬཰㔞࡜୍౯࢖࢜ࣥࡢ⏕ᡂ㔞ࡢ ẚࢆ♧ࡋ࡚࠸ࡿࠋ2㔜࢖࢜ࣥ໬㐣⛬࡟ࡣ2౯࢖࢜ࣥ⏕ᡂ

࡜࢖࢜ࣥᑐ(O⁺+CO⁺)ࡢ2✀㢮ࡀほ ࡉࢀࡓࡀࠊᅗࡣࡑ

ࢀࡒࢀࡢẚࢆ♧ࡋ࡚࠸ࡿࠋᅗ࠿ࡽุࡿࡼ࠺࡟2㔜࢖࢜

ࣥ໬ࡢ㜈್ࡣ3-4x10¹³Wcm^-2⛬ᗘ࡛࠶ࡾࠊࡇࡢ᫬ࡢ෌⾪

✺࢚ࢿࣝࢠ࣮ࡣ⣙6eV࡛2㔜࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ࡼࡾ

㐭࠿࡟ᑠࡉ࠸ࡇ࡜ࡀุࡿࠋᚑࡗ࡚ࡇࡢᙉᗘ㡿ᇦ࡛ࡢ2 㔜࢖࢜ࣥ໬㐣⛬ࡣ୍౯࢖࢜ࣥࡢບ㉳≧ែ࡜㟁Ꮚࡢ෌

⾪✺࡟ࡼࡗ࡚⏕ࡌࡿ≀࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ

ᮏ◊✲ࡣ୰ᅜ࣭ྜྷᯘ኱Ꮫࠊࢻ࢖ࢶ࣭ࣇࣛࣥࢡࣇࣝࢺ

኱Ꮫ࡜ࡢᅜ㝿ඹྠ◊✲࡛࠶ࡿࠋ [2.1] N. Neumann et al. to be submitted.

[2.2] C. Wang et al. to be submitted.

22+

2

&2+

&2

㸱

㸱㸬ᴟ⣸እ⮬⏤㟁Ꮚ࣮ࣞࢨ࣮㸦EUVFEL㸧

࡟ࡼࡿཎᏊࡢẁ㝵ⓗከගᏊከ㔜࢖࢜ࣥ໬

ཎ Ꮚ ࡟ ᴟ ⣸ እ ⮬ ⏤ 㟁 Ꮚ ࣞ ࣮ ࢨ ࣮

㸦EUVFEL㸧ࢆ㞟ගࡋ↷ᑕࡍࡿ࡜ࠊ㸯ಶࡢ

ཎᏊෆࡢ」ᩘࡢ㟁Ꮚࡀ๤ࡂྲྀࡽࢀཎᏊࡣ ከ㔜࡟࢖࢜ࣥ໬ࡉࢀࡿࡇ࡜ࡀண᝿ࡉࢀࡿࠋ ᮏ◊✲࡛ࡣࠊ⌮◊᧛☻◊✲ᡤࡢ SCSS ヨ㦂 ຍ㏿ჾ࠿ࡽⓎ⏕ࡍࡿ EUVFEL ࢆ⏝࠸࡚ࠊ ᕼ࢞ࢫཎᏊࡢከ㔜࢖࢜ࣥ໬ࢆほ ࡋࡓ [3.1,3.2]ࠋ

ᅗ3.1࡟ArཎᏊ࡟ගᏊ࢚ࢿࣝࢠ࣮20 eVࡢ FELࢆ↷ᑕࡋࡓ㝿ࡢ࢖࢜ࣥ㣕⾜᫬㛫ࢫ࣌ࢡ ࢺࣝࢆ♧ࡍࠋ᭱኱㸴౯ࡢArཎᏊ࢖࢜ࣥࡀほ  ࡉࢀ࡚࠸ࡿࡇ࡜ࡀศࡿࠋ୰ᛶࡢArཎᏊࢆ

6౯ࡲ࡛࢖࢜ࣥ໬ࡍࡿࡓࡵ࡟ࡣࠊ⣙310 eV ࡢ࢚ࢿࣝࢠ࣮ࡀせồࡉࢀࠊᑡ࡞ࡃ࡜ࡶ15ಶ ௨ୖࡢගᏊࢆ྾཰ࡍࡿࡇ࡜ࡀᚲせ࡛࠶ࡿࠋ

ཎᏊࡢ࢖࢜ࣥ໬㐣⛬ࢆヲ⣽࡟ㄪ࡭ࡿࡓ

ࡵ࡟ࠊ࢖࢜ࣥ཰㔞ࡢධᑕගᙉᗘ౫Ꮡᛶࢆ 

ࡿࡇ࡜ࡀ᭷ຠ࡛࠶ࡿࠋᅗ3.2࡟ほ ࡉࢀࡓ Arཎ Ꮚ ࢖ ࢜ ࣥ ཰ 㔞 ࡢFELᙉ ᗘ ౫ Ꮡ ᛶ ࢆ log-logࣉࣟࢵࢺ࡛♧ࡍࠋ1౯࢖࢜ࣥAr⁺ࡢ཰

㔞ࡣFELᙉᗘ࡟౫Ꮡࡋ࡚࠾ࡽࡎࠊ1౯࢖࢜ࣥ

໬㐣⛬ࡀ㣬࿴ࡋ࡚࠸ࡿࡇ࡜ࢆ♧ࡋ࡚࠸ࡿࠋ ከ౯࢖࢜ࣥࡢ཰㔞᭤⥺ࡢഴࡁࡣࠊ୰ᛶཎᏊ

࠿ࡽከ౯࢖࢜ࣥࢆ⏕ᡂࡍࡿࡓࡵ࡟ᚲせ࡞

ගᏊᩘࡼࡾࡶᑠࡉ࠸್ࢆ♧ࡋ࡚࠸ࡿࠋࡇࡇ

࡛ (n+1) ౯࢖࢜ࣥ཰㔞࡜ n ౯࢖࢜ࣥ཰㔞 ࡢᕪࢆྲྀࡿ࡜ࠊࡑࡢ್ࡣࠊn ౯࢖࢜ࣥ㟁㞳 ࡍࡿ㝿࡟ᚲせ࡞ගᏊᩘ࡜୍⮴ࡋ࡚࠸ࡿࠋࡇ ࡢࡇ࡜ࡣࠊከ౯࢖࢜ࣥ໬ࡍࡿ㝿࡟ࠊ୰ᛶཎ Ꮚࡀᚲせ࡞ගᏊࢆྠ᫬࡟྾཰ࡋ୍࡚ᅇ࡛

ከ౯࢖࢜ࣥ໬ࡍࡿࡢ࡛ࡣ࡞ࡃࠊ㟁Ꮚࢆ1ಶ ࡎࡘᨺฟࡋ࡚࠸ࡿࠊࡍ࡞ࢃࡕ࢖࢜ࣥ໬ࡀẁ 㝵ⓗ࡟㐍⾜ࡋ࡚࠸ࡿࡇ࡜ࢆ♧ࡋ࡚࠸ࡿࠋ

ᮏ◊✲ࡣࠊ⏘ᴗᢏ⾡⥲ྜ◊✲ᡤࠊி㒔኱

Ꮫࠊ⌮໬Ꮫ◊✲ᡤࠊ㧗㍤ᗘග⛉Ꮫ◊✲ࢭࣥ

ࢱ࣮ࠊࢻ࢖ࢶ࣭ࣇࣛࣥࢡࣇࣝࢺ኱Ꮫࠊ࢔࣓

࣭࣮ࣜ࢝ࣟࣞࣥࢫࣂ࣮ࢡ࣮ࣞᅜ❧◊✲ᡤ➼

࡜ࡢᅜ㝿ඹྠ◊✲࡛࠶ࡿࠋ

[3.1] K. Motomura et al. J. Phys. B 42, 221003 (2009).

[3.2] M. Kurka et al. to be submitted.

Fig. 3.1: Ion time-of-flight mass spectrum of Ar.

Fig. 3.2: (a) FEL power dependence of the ion yields for the individual charge states Arⁿ⁺ and (b) blow-up in the high FEL intensity region.

㸲

㸲㸬ྠ᫬ィ ἲ࡛ほ ࡍࡿEUVFEL࡟ࡼࡿศᏊ ࡢẁ㝵ⓗከගᏊከ㔜࢖࢜ࣥ໬

EUVFELࢆ㞟ගࡋ࡚ศᏊ࡟↷ᑕࡍࡿ࡜ࠊศᏊ

ࡣከ㔜࡟࢖࢜ࣥ໬ࡋࠊ」ᩘࡢゎ㞳࢖࢜ࣥࡀ⏕ᡂ ࡍࡿࡇ࡜ࡀண ࡉࢀࡿࠋᮏ◊✲࡛ࡣࠊ㸰ཎᏊศ Ꮚ㸦N2ࠊ O2㸧ࡸ㸱ཎᏊศᏊ㸦CO2㸧࡟EUVFEL

ࢆ↷ᑕࡋࠊ⏕ᡂࡍࡿゎ㞳࢖࢜ࣥᑐࢆ㐠ື㔞ከ㔜 ィ ⿦⨨࡟ࡼࡗ࡚ほ ࡋࡓ [4.1-4.3]ࠋ ᅗ4.1࡟N2ศᏊࡢග࢖࢜ࣥ-ග࢖࢜ࣥྠ᫬ィ  㸦PIPICO㸧࣐ࢵࣉࢆ♧ࡍࠋ༢୍ࡢN2ศᏊ࠿

ࡽᨺฟࡉࢀࡓ࢖࢜ࣥᑐࡣᅗ4ࠋ1ୖ࡛ࡣ┤⥺࡜࡞

ࡗ࡚⌧ࢀࡿࠋᅗ4.1ࡣ N⁺-N⁺ࠊN⁺-N²⁺ࠊN²⁺-N²⁺ࠊ N²⁺-N³⁺ ࢖࢜ࣥᑐࡀほ ࡉࢀ࡚࠸ࡿࡇ࡜ࢆ♧

ࡋ࡚࠾ࡾࠊ᭱኱࡛㸳౯ࡢ N2 ศᏊ࢖࢜ࣥࡀ⏕

ᡂࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿࠋ

ᅗ4.2࡟ࡣࠊほ ࡉࢀࡓ࢖࢜ࣥᑐࡢ㐠ື࢚ࢿ

ࣝࢠ࣮ᨺฟ (KER) ศᕸࢆ♧ࡋ࡚࠸ࡿࠋᶓ㍈ࡣ KERࢆ࢖࢜ࣥᑐࡢ㟁Ⲵࡢ✚ (Q) ࡛つ᱁໬ࡋ࡚

࠾ࡾࠊࡇࢀࡣ➼ࡋ࠸᰾㛫㊥㞳࡟࠾ࡅࡿࢡ࣮ࣟࣥ

཯Ⓨ࢚ࢿࣝࢠ࣮࡛つ᱁໬ࡋ࡚࠸ࡿࡇ࡜࡟┦ᙜ ࡍࡿࠋୖ㒊࡟ࡣࡑࡢ࢚ࢿࣝࢠ࣮࡟┦ᙜࡍࡿ᰾㛫

㊥㞳ࢆ♧ࡋ࡚࠾ࡾࠊ୰ᛶ N2 ศᏊࡢᇶᗏ≧ែ

࡟࠾ࡅࡿᖹ⾮᰾㛫㊥㞳ࢆ◚⥺࡛♧ࡋ࡚࠸ࡿࠋ౯

ᩘࡀ኱ࡁࡃ࡞ࡿ࡯࡝ KER/Q ࡀᑠࡉ࠸᪉ྥ㸦᰾

㛫㊥㞳ࡀᘏࡧࡿ᪉ྥ㸧࡟ศᕸࡀࢩࣇࢺࡋ࡚࠸ࡿ

ࡇ࡜ࡀศࡿࠋࡇࢀࡣ୰ᛶศᏊࡀ⣙ 100 fs ࡢ FELࣃࣝࢫࡢ᫬㛫ᖜࡢ㛫࡟ẁ㝵ⓗ࢖࢜ࣥ໬ࡍ

ࡿ᭱୰࡟ࠊཎᏊ㛫㊥㞳ࡀᘏࡧ࡚࠸ࡿࡇ࡜ࢆ♧ࡍ

ࡶࡢ࡛࠶ࡿࠋྠࡌࡃ㸰ཎᏊศᏊ࡛࠶ࡿ O2 ศ Ꮚ࡟ࡘ࠸࡚ࡶྠᵝ࡞⤖ᯝࡀᚓࡽࢀࡓࠋ┤⥺㸱ཎ ᏊศᏊ࡛࠶ࡿ CO2 ศᏊ࡟ࡘ࠸࡚ࡣග࢖࢜ࣥ -ග࢖࢜ࣥ-ග࢖࢜ࣥ㸱㔜ྠ᫬ィ ࢆ⾜࠸ࠊ᭱኱

㸴౯ࡢศᏊ࢖࢜ࣥࡀ⏕ᡂࡋ࡚࠸ࡿࡇ࡜ࡀ☜ㄆ ࡉࢀࠊከ㔜࢖࢜ࣥ໬ࡢ᭱୰࡟ศᏊࡀᒅ᭤ࡍࡿ㐣

⛬ࡢᏑᅾࡀ᫂ࡽ࠿࡜࡞ࡗࡓࠋ

ᮏ◊✲ࡣࠊᩥ㒊⛉Ꮫ┬࠿ࡽࡢ᥼ຓࢆᚓ࡚ࠊ⏘

ᴗᢏ⾡⥲ྜ◊✲ᡤࠊி㒔኱Ꮫࠊ⌮໬Ꮫ◊✲ᡤࠊ 㧗㍤ᗘග⛉Ꮫ◊✲ࢭࣥࢱ࣮ࠊࢻ࢖ࢶ࣭࣐ࢵࢡࢫ

ࣉࣛࣥࢡ◊✲ᡤࠊࢻ࢖ࢶ࣭ࣇࣛࣥࢡࣇࣝࢺ኱Ꮫ

➼࡜ࡢᅜ㝿ඹྠ◊✲࡜ࡋ࡚㐙⾜ࡋࡓࠋ

[4.1] H. Fukuzawa et al. J. Phys. B 42, 181001 (2009).

[4.2] A. Yamada et al. submitted.

[4.3] K. Motomura et al. to be submitted.

Fig. 4.1. Photoion-photoion coincidence (PIPICO) map for N2 irradiated by 24 eV FEL.

Fig. 4.2. Kinetic energy release (KER) distributions for ion-pair formations from N2 irradiated by 24 eV FEL.

㸳

㸳㸬EUVFELບ㉳ࡋࡓᕧ኱

࢟ࢭࣀࣥࢡࣛࢫࢱ࣮࠿ࡽࡢ ከ౯࢖࢜ࣥ⏕ᡂ

㏆ᖺࡢ⮬⏤㟁Ꮚ࣮ࣞࢨ࣮

ࡢⓎᒎ࡟ࡼࡾࠊᴟ⣸እග㡿 ᇦ࡟࠾ࡅࡿ㧗ᙉᗘ࣮ࣞࢨ࣮

ග࡜≀㉁࡜ࡢ┦஫స⏝ࡀά

Ⓨ࡟◊✲ࡉࢀጞࡵࡓࠋᕼ࢞

ࢫࢡࣛࢫࢱ࣮ࡣࠊࢡࣛࢫࢱ

࣮ࢧ࢖ࢬࢆᖜᗈࡃኚ࠼ࡽࢀ

ࡿࡓࡵࠊࢧ࢖ࢬ౫Ꮡᛶࢆࡳ

ࡿᐇ㦂࡟㐺ࡋ࡚࠸ࡿࠋᕼ࢞

ࢫࢡࣛࢫࢱ࣮࡟EUVFELࢆ 㞟ගࡋ࡚↷ᑕࡍࡿ࡜ࢡࣛࢫ

ࢱ࣮ෆࡢከࡃࡢཎᏊࡀྠ᫬࡟ບ㉳ࡲࡓࡣ࢖࢜

ࣥ໬ࡉࢀࢡ࣮ࣟࣥ⇿Ⓨࡍࡿࡇ࡜ぢฟࡉࢀ࡚࠸

ࡿࠋᮏ◊✲࡛ࡣࠊ⌮◊᧛☻◊✲ᡤࡢ㹖⥺⮬⏤㟁 Ꮚ࣮ࣞࢨ࣮ヨ㦂ຍ㏿ჾ࠿ࡽⓎ⏕ࡍࡿ52nmࡢ

EUV-FELࣃࣝࢫගࢆᕧ኱࢟ࢭࣀࣥࢡࣛࢫࢱ࣮

࡟↷ᑕࡋࡑࡢග྾཰ཬࡧゎ㞳㐣⛬࡟ࡘ࠸࡚◊

✲ࡋࡓ [5.1,5.2]ࠋ

ᮏᐇ㦂࡛ࡣࠊ㉸㡢㏿ࢪ࢙ࢵࢺἲࢆ⏝࠸࡚࢟ࢭ

ࣀࣥࢡࣛࢫࢱ࣮XeN (<N> ~ 2000ࠊ 10000ࠊ 50000)ࢆసᡂࡋࠊ2™10¹³ W/cm²⛬ᗘ࠿ࡑࢀ௨

ୗࡢFELᙉᗘ࡛㐠ື㔞࢖࣓࣮ࢪࣥࢢ ᐃࢆ⾜

ࡗࡓࠋࡑࡢ⤖ᯝࠊࢡࣛࢫࢱ࣮ࡣ㠀ᖖ࡟ከᩘࡢ ගᏊࢆ྾཰ࡋࠊࢡ࣮ࣟࣥ⇿Ⓨ࡟ࡼࡗ࡚ከᩘࡢ ゎ㞳࢖࢜ࣥ࡟ゎ㞳ࡋ࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋ

ࡲࡓ㸯ཎᏊศᏊ࡛ࡣከගᏊ྾཰࡟ࡼࡗ࡚ከ౯

࢖࢜ࣥࡀほ ࡉࢀࡓࡀࠊࢡࣛࢫࢱ࣮ࢧ࢖ࢬ<N>~2000࡛ࡣ୍౯࢖࢜ࣥࡢゎ㞳࢖࢜ࣥXe⁺ࠊ Xe2+➼ࡋ࠿ほ  ࡉࢀ࡞࠿ࡗࡓࠋࢧ࢖ࢬࢆ኱ࡁࡃࡍࡿ(<N>~10000ࠊ 50000)࡜ࠊ஧౯࢖࢜ࣥXe²⁺ࡀࢡࣛࢫࢱ࣮࠿ࡽ⏕

ࡌ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ<N>~50000࡛ほ ࡉࢀࡓࢫ࣌ࢡࢺࣝࢆᅗ5.1࡟ࠊࡇࡢࡼ࠺࡞ࢫ࣌ࢡࢺࣝ࠿ࡽ

ồࡵࡓゎ㞳⏕ᡂ࢖࢜ࣥXe2+ࠊ Xe⁺ࠊ Xe²⁺ࡢ࢚ࢿࣝࢠ࣮ศᕸࢆᅗ5.2࡟♧ࡍࠋ2౯࢖࢜ࣥXe²⁺ࡀ㧗࠸࢚ࢿ

ࣝࢠ࣮ࢆࡶࡗ࡚⏕ᡂࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿࠋࡇࡢࡼ࠺࡞≉␗ⓗ࡞㐠ື࢚ࢿࣝࢠ࣮ศᕸࡣXe²⁺ࡀࢡࣛࢫ ࢱ࣮⾲㠃࠿ࡽ⏕ᡂࡍࡿࡇ࡜ࢆ♧၀ࡍࡿࡶࡢ࡛࠶ࡿࠋᕧ኱Neࢡࣛࢫࢱ࣮࡟ࡘ࠸࡚ࡶྠᵝ࡞⤖ᯝࡀᚓࡽࢀ

࡚࠸ࡿ [5.3]ࠋ

ᮏ◊✲ࡣࠊᩥ㒊⛉Ꮫ┬࠿ࡽࡢ᥼ຓࢆᚓ࡚ࠊி㒔኱Ꮫࠊ⏘ᴗᢏ⾡⥲ྜ◊✲ᡤࠊ⌮໬Ꮫ◊✲ᡤࠊ㧗㍤ᗘ ග⛉Ꮫ◊✲ࢭࣥࢱ࣮࡜ࡢඹྠ◊✲࡜ࡋ࡚㐙⾜ࡋࡓࠋ

[5.1] H. Iwayama et al. submitted to Phys. Rev. Lett.

[5.2] K. Nagaya et al. submitted to J. Electr. Spectrosc. Relat. Phenom.

[5.3] K. Nagaya et al. submitted to J. Phys. Conf. Ser.

Fig. 5.1. Time-of-flight (TOF) spectrum (upper) and TOF vs position Y map (lower) for Xe clusters of <n>~50000, irradiated by FEL pulses (52 nm, ~100 fs, ~ 2 x 10¹³ W/cm²).

Fig. 5.2. Kinetic energy distributions of fragment ions from Xe clusters for <N> ~50000.

㸴

㸴㸬ࢥ࢔ࢩ࢙ࣝᆺNeArΰྜࢡࣛࢫࢱ࣮ࡢEUVFEL࡟ࡼࡿከ㔜࢖࢜ࣥ໬

ᮏ◊✲࡛ࡣࠊ61nmࡢEUVFELࣃࣝࢫගࢆArࢥ࢔Neࢩ࢙ࣝࢡࣛࢫࢱ࣮࡟↷ᑕࡋࡑࡢග྾཰ཬࡧゎ㞳㐣

⛬࡟ࡘ࠸࡚◊✲ࡋࡓ [6.1]ࠋ61nmࡢEUVFELࣃࣝࢫග࡟ᑐࡋ࡚Neࢩ࢙ࣝࡣ࡯࡜ࢇ࡝㏱࡛᫂࠶ࡿࡓࡵࠊ୺

࡟Arࢥ࢔ࡢከ㔜࢖࢜ࣥ໬ࡀಁ㐍ࡉࢀࡿ࡜ᮇᚅࡉࢀࡿࠋᮏ◊✲ࡢ┠ⓗࡣArࢥ࢔࠿ࡽNeࢩ࢙ࣝ࡬ࡢ㟁Ⲵ⛣

ື➼ࡢ㟁Ⲵࡢ⦆࿴ࢲ࢖ࢼ࣑ࢡࢫࢆ᳨ドࡍࡿࡇ࡜࡛࠶ࡿࠋᮏᐇ㦂࡛ࡣࠊAr࡜Neࡢΰྜ࢞ࢫࢆ⏝࠸ࡓ㉸㡢

㏿ࢪ࢙ࢵࢺἲ࡟ࡼࡾᖹᆒࢧ࢖ࢬࡀ<N> ~ 1000ࡢArࢥ࢔Neΰྜࢩ࢙ࣝࢡࣛࢫࢱ࣮ࢆసᡂࡋࠊ10¹⁴ W/cm²

⛬ᗘࡢFELᙉᗘ࡛㐠ື㔞࢖࣓࣮ࢪࣥࢢ ᐃࢆ⾜ࡗࡓࠋᅗ6.1࡟61 nm ࡢEUVFELࢆࠊࣆࣗ࢔࣮Neࢡࣛࢫ ࢱ࣮ࠊAr⃰ᗘࡀ㸯㸣࠾ࡼࡧ3㸣ࡢArࢥ࢔Neΰྜࢡࣛࢫࢱ࣮࡟↷ᑕࡋࡓ㝿࡟⏕ᡂࡉࢀࡿ࢖࢜ࣥࡢ㣕⾜᫬㛫 ࢫ࣌ࢡࢺࣝࢆࠊᅗ6.2࡟ࡇࢀࡽࡢࢫ࣌ࢡࢺࣝࢆゎᯒࡋ࡚ᚓࡽࢀࡓNe⁺࢖࢜ࣥ࡜Ar⁺࢖࢜ࣥࡢ㐠ື࢚ࢿࣝࢠ

࣮ศᕸࢆ♧ࡍࠋAr⁺ࡢ㐠ື࢚ࢿࣝࢠ࣮ࡣNe⁺ࡢ㐠ື࢚ࢿࣝࢠ࣮࡟ẚ࡭࡚ᑠࡉ࠸ࠋࡇࡢࡇ࡜ࡣసᡂࡋࡓΰ

ྜࢡࣛࢫࢱ࣮ࡀ୺࡟Arࢥ࢔Neࢩ࢙ࣝࡢᵓ㐀ࢆᣢࡗ࡚࠸ࡿࡇ࡜ࢆ♧၀ࡍࡿࠋAr⃰ᗘࡀ㸯㸣࠿ࡽ3㸣࡟ቑຍ ࡍࡿ࡜Ne⁺཰㔞ࡀⴭࡋࡃቑຍࡋࠊ㐠ື࢚ࢿࣝࢠ࣮ศᕸࡶⴭࡋࡃ㧗࢚ࢿࣝࢠ࣮ഃ࡟ࢩࣇࢺࡍࡿࠋࡇࢀࡽࡢ

⤖ᯝࡣArࢥ࢔࠿ࡽNeࢩ࢙ࣝ࡬ࡢ㟁Ⲵ⛣ືࡀ㉳ࡁ࡚࠸ࡿࡇ࡜ࢆ♧၀ࡍࡿࡶࡢ࡛࠶ࡿࠋ

ᮏ◊✲ࡣࠊᩥ㒊⛉Ꮫ┬࠿ࡽࡢ᥼ຓࢆᚓ࡚ࠊ⏘ᴗᢏ⾡⥲ྜ◊✲ᡤࠊி㒔኱Ꮫࠊ⌮໬Ꮫ◊✲ᡤࠊ㧗㍤ᗘ ග⛉Ꮫ◊✲ࢭࣥࢱ࣮ࠊࢻ࢖ࢶ࣭࣐ࢵࢡࢫࣉࣛࣥࢡ◊✲ᡤࠊࢻ࢖ࢶ࣭ࣇࣛࣥࢡࣇࣝࢺ኱Ꮫ➼࡜ࡢᅜ㝿ඹ

ྠ◊✲࡜ࡋ࡚㐙⾜ࡋࡓࠋ

[6.1] A. Sugishima et al. to be submitted.

Fig. 6.1. Ion TOF spectra for Ar-core Ne-shell mixed clusters of <n>~1000, with Ar contents of 0, 1, and 3 % irradiated by FEL pulses (61 nm, ~100 fs, ~ 2 x 10¹³ W/cm²).

Fig. 6.2. Kinetic energy distributions of Ne⁺ and Ar⁺ fragments from pure Ne and Ar-core Ne-shell mixed clusters

㸵

㸵㸬Neࢡࣛࢫࢱ࣮ࡢෆẆග࢖࢜ࣥ໬࡜ཎᏊ㛫ࢡ࣮ࣟࣥ⦆࿴ࠊࢡ࣮ࣟࣥゎ㞳

ࣇ࢓ࣥࢹ࣮ࣝ࣡ࣝࢫࢡࣛࢫࢱ࣮ෆࡢศᏊࢆෆẆග࢖࢜ࣥ໬ࡉࡏࡿ࡜ࠊ࣮࢜ࢪ࢙㐣⛬࡟ࡼࡿ⬺ບ㉳ࡀ

㉳ࡁࡿࠋ࣮࢜ࢪ࢙㐣⛬ᚋࠊࡑࡢศᏊࡀບ㉳≧ែ࡛࠶ࡿሙྜࠊࡉࡽ࡟⥆࠸࡚ཎᏊ㛫ࢡ࣮ࣟࣥ⬺ບ㉳㸦ICD;

Intermolecular Coulombic Decay㸧㐣⛬ࡀ㉳ࡁࠊ㞄᥋ࡋࡓศᏊ࠿ࡽ㟁Ꮚ㸦ICD㟁Ꮚ㸧ࡀᨺฟࡉࢀࠊ⬺ບ㉳

ࡍࡿࠋࡇࢀࡽࡢ㟁Ꮚ⦆࿴ࢆ⤒࡚ࢡࣛࢫࢱ࣮ࡣከ౯ࢡࣛࢫࢱ࣮࢖࢜ࣥ࡜࡞ࡾࠊࢡ࣮ࣟࣥ⇿Ⓨ࡟ࡼࡗ࡚ゎ 㞳ࡋࠊ࢖࢜ࣥࢆᨺฟࡍࡿࠋࡇࡢ୍㐃ࡢ㐣⛬࡛ᨺฟࡉࢀࡿ㟁Ꮚ࠾ࡼࡧ࢖࢜ࣥࢆྠ᫬ィ ࡍࡿ࡜ࠊࡇࢀࡽ

㐣⛬ࡢࢲ࢖ࢼ࣑ࢡࢫࡢヲ⣽࡞᝟ሗࢆᚓࡽࢀࡿࠋᮏ◊✲࡛ࡣࠊᕼ࢞ࢫࢡࣛࢫࢱ࣮ࡢග࢖࢜ࣥ໬࡜ࠊᚋ⥆

㐣⛬࡛࠶ࡿICD㐣⛬࠾ࡼࡧゎ㞳ࡢࢲ࢖ࢼ࣑ࢡࢫࡢ▱ぢࢆᚓࡿࡓࡵ࡟ࠊ890 eV ࡢ㌾X⥺ࢆNeࢡࣛࢫࢱ

࣮࡟↷ᑕࡋࠊᖹᆒࢧ࢖ࢬࡀ24ಶ⛬ᗘࡢNeࢡࣛࢫࢱ࣮⢏Ꮚ࠿ࡽNe 1s ග࢖࢜ࣥ໬ᚋ࡟⏕ᡂࡉࢀࡿ」ᩘ

ࡢ㟁Ꮚ࡜࢖࢜ࣥࢆྠ᫬ィ ࡋࡓ [7.1]ࠋ ᐇ㦂ࡣ SPring-8 ࡢ BL27SU࡛⾜ࡗࡓࠋᐇ 㦂⿦⨨ࡣࠊග※ࠊࢡࣛࢫࢱ࣮※࠾ࡼࡧ 2 ḟ ඖ᳨ฟჾࢆഛ࠼ࡓ 2 ྎࡢ㣕⾜᫬㛫ᆺ㐠ື㔞 ศගィ࠿ࡽᡂࡗ࡚࠾ࡾࠊ」ᩘࡢ㟁Ꮚ࡜࢖࢜

ࣥࡢ㐠ື㔞ࢆྠ᫬࡟ィ ࡛ࡁࡿࠋࢡࣛࢫࢱ

࣮ࣅ࣮࣒ࡣ30 mࠊ 110 K ࡢࣀࢬཱྀࣝ࠿ࡽ

ୖ᪉ࡼࡾ㖄┤᪉ྥ࡟ᑟධࡉࢀࠊࢡࣛࢫࢱ࣮

ࢧ࢖ࢬࡣ⫼ᅽ࡟ࡼࡗ࡚ไᚚࡉࢀࡿࠋග※ࡣ

┤⥺೫ගࡢࢩࣥࢡࣟࢺࣟࣥᨺᑕග࡛࠶ࡾࠊ

㌾X⥺ࡣࢡࣛࢫࢱ࣮ࣅ࣮࣒࡟ᆶ┤࡞᪉ྥࡼ

ࡾධᑕࡉࢀࡿࠋ㌾X⥺ࢆ྾཰ࡋࡓࢡࣛࢫࢱ

࣮࠿ࡽ⏕ᡂࡉࢀࡓ㟁Ꮚࡣࠊ㟁ሙ࡟ࡼࡗ࡚Ỉ ᖹ᪉ྥ࡟ࠊ࢖࢜ࣥࡣ㟁Ꮚ࡜ṇ཯ᑐࡢ᪉ྥ࡟

ຍ㏿ࡉࢀࠊ2ḟඖ᳨ฟჾ᳨࡛ฟࡉࢀࡿࠋィ  ࡉࢀࡓ᫬㛫࡜᳨ฟ఩⨨࠿ࡽࠊ㟁Ꮚ࡜࢖࢜ࣥ

ࡢ3ḟඖࡢ㐠ື㔞ࢆ⟬ฟࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋ ᅗ7.1 ࡟ࠊ1ಶࡢࢡࣛࢫࢱ࣮⢏Ꮚ࠿ࡽ⏕ᡂࡋ 2ࡘࡢ Ne⁺ ࡜ྠ᫬࡟ィ ࡉࢀࡿග㟁Ꮚࡢᨺ ฟゅᗘศᕸࢆ♧ࡍࠋගᏊ࢚ࢿࣝࢠ࣮ h ࡣ 890 eV ࡛࠶ࡾࠊNeࢡࣛࢫࢱ࣮ࡢᖹᆒࢡࣛࢫ ࢱ࣮ࢧ࢖ࢬ n ࡣ 24 ಶ࡛࠶ࡿࠋග㟁Ꮚࡢ ᨺฟゅᗘศᕸࡣࠊNe⁺ ࡢᨺฟ᪉ྥ࡟౫ࡽࡎ 㟁Ẽ࣋ࢡࢺࣝ࡟ࡢࡳ౫Ꮡࡍࡿࡇ࡜ࠊ㟁Ẽ࣋

ࢡࢺࣝ࡟ᑐࡍࡿゅᗘศᕸࡣ Ne ཎᏊ࡟ẚ࡭

࡚␗᪉ᛶࡀῶᑡࡋ࡚࠸ࡿࡇ࡜ࡀぢฟࡉࢀࡿࠋ ࡇࢀࡣග㟁Ꮚࡀ࿘ᅖ࡟ቑຍࡋࡓཎᏊ࡜⾪✺

ࡋࠊᩓ஘ࡉࢀࡿࡓࡵ࡜⪃࠼ࡽࢀࡿࠋᅗ7.2࡟ࠊ 2ࡘࡢ Ne⁺ ࡜ྠ᫬࡟ィ ࡉࢀࡓICD㟁Ꮚࡢ ᨺฟゅᗘศᕸࢆ♧ࡍࠋNe⁺ ࡢᨺฟ᪉ྥࡣỈ ᖹྑྥࡁ࡛࠶ࡾࠊᕥ࠿ࡽ㡰࡟ࠊ㟁Ẽ࣋ࢡࢺ

ࣝ࡜ Ne⁺ ࡢᨺฟ᪉ྥ࡜ࡢ࡞ࡍゅᗘࡣ0ᗘࠊ45ᗘࠊ90ᗘ࡛࠶ࡿࠋICD㟁Ꮚࡣ➼᪉ⓗ࡟ᨺฟࡉࢀࡿࡇ࡜

ࡀศ࠿ࡿࠋ

ᮏ◊✲ࡣࠊᏛ᣺࠿ࡽࡢ᥼ຓࢆᚓ࡚ࠊி㒔኱Ꮫࠊ⏘ᴗᢏ⾡⥲ྜ◊✲ᡤࠊ㧗㍤ᗘග⛉Ꮫ◊✲ࢭࣥࢱ࣮

࡜ࡢඹྠ◊✲࡜ࡋ࡚㐙⾜ࡋࡓࠋ [7.1] K. Sakai et al. to be submitted

-2 0 2 -2 0 2 -2 0 2

E

Ne

⁺

Ne

⁺

Ne

⁺

-2 0 2

-2 0 2 -2-2 00 22 -2-2 00 22

E

Ne

⁺

Ne

⁺

Ne

⁺

Fig. 7.1. Angular distributions of Ne 1s photoelectrons emitted from Ne_n (<n> ~ 24). Directions of the ion emission are at 0, 45, and 90 degrees with respect to the direction of the polarization vector E, which is horizon-tal in the figure.

-1 0 1 -1 0 1

Ne

⁺

E E

E

-1 0 1 -1 0 1

-1 0 1 -1-1 0 10 1

Ne

⁺

E E

E

-1 0 1 -1 0 1

Fig.7.2. Angular distributions of ICD electrons emitted from Ne_n(n24). Directions of the polarization vector E are at 0, 45, and 90 degrees with respect to the ion emis-sion direction, which is horizontal in the figure.

㸶

㸶㸬NeArࢲ࢖࣐࣮࡟࠾ࡅࡿཎᏊ㛫ࢡ࣮ࣟࣥ⦆࿴

࢖࢜ࣥ໬ࡉࢀࡓບ㉳ཎᏊ࡟࠾࠸࡚ࠊཎᏊෆ࡛ࡢ⬺ບ㉳ࡀ࢚ࢿࣝࢠ࣮ⓗ࡟୙ྍ⬟࡞ሙྜ࡛ࡶࠊ㏆᥋ཎ Ꮚࡀ㟁Ꮚࢆᨺฟࡋ࡚⬺ບ㉳ࡍࡿࡇ࡜ࡀ࠶ࡿࠋࡇࡢ㐣⛬ࢆཎᏊ㛫ࢡ࣮ࣟࣥ⬺ບ㉳㸦 㸧㐣⛬࡜࠸࠺ࠋࡇࡢ㐣⛬ࡣࡽࡀࢡࣛࢫࢱ࣮ࢆ⏝࠸࡚ᐇ㦂ⓗ࡟ド᫂ࡋ

࡚௨᮶ࠊᩘࠎࡢᐇ㦂ࡀᡂࡉࢀ࡚࠾ࡾࠊᙜ◊✲ࢢ࣮ࣝࣉࡶ㟁Ꮚ࢖࢜ࣥ୕ḟඖ㐠ື㔞ྠ᫬ィ ἲࢆ⏝࠸࡚

◊✲ࢆ⾜ࡗ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊࢲ࢖࣐࣮࡟ࡘ࠸࡚ෆẆග࢖࢜ࣥ໬ࢆ⾜࠸ࠊࡇࡢࡼ࠺࡞㟁Ꮚ⦆࿴

ࡢほ ࢆヨࡳࡓࠋ

ᮏᐇ㦂ࡣࠊࡢ┤⥺೫ග㌾⥺ࣅ࣮࣒ࣛ࢖ࣥ!࡛⾜ࢃࢀࡓࠋගᏊ࢚ࢿࣝࢠ࣮ࡣ "

࡟タᐃࡋ࡚ࠊ#$㌶㐨ࡢ࢖࢜ࣥ໬࣏ࢸࣥࢩࣕࣝࡼࡾ⣙#&"㧗ࡃ࡞ࡿࡼ࠺࡟ࡋࡓࠋ ΰྜ࢞ࢫ ࡢ㉸㡢㏿ࢡࣛࢫࢱ࣮ࣅ࣮࣒ࡣ㌾⥺࡜ᆶ┤࡟஺ࢃࡾࠊࡑࡢ஺Ⅼࢆᣳࢇ࡛ྥ࠿࠸ྜࡗ࡚࢖࢜ࣥ࡜㟁Ꮚࡢ

஧ḟඖ᳨ฟჾࡀタ⨨ࡉࢀ࡚࠸ࡿࠋ᳨ฟჾ࡟฿㐩ࡋࡓ㟁Ꮚ࡜࢖࢜ࣥࡢ఩⨨࡜᫬㛫ࢆィ ࡍࡿࡇ࡜࡟ࡼࡾࠊ 㟁Ꮚ࡜࢖࢜ࣥࡢ୕ḟඖ㐠ື㔞ࢆྠ᫬ィ ࡋࡓࠋ

ゎ㞳ࡋࡓ࢖࢜ࣥࡢ㣕⾜᫬㛫ࡼࡾ ^''ࠊ^''࡞࡝ࡢ➼᰾ࢲ࢖࣐࣮ࡔࡅ࡛࡞ࡃ ^''ࠊ ^''࡞࡝ࡢ␗᰾ࢲ࢖࣐࣮࠿ࡽࡢ࢖࢜ࣥᑐ⏕ᡂࡀ☜ㄆࡉࢀࡓࠋ^''࢖࢜ࣥᑐ⏕ᡂ࡜ྠ᫬࡟⏕ᡂ ࡍࡿప࢚ࢿࣝࢠ࣮㟁Ꮚࡢ࢚ࢿࣝࢠ࣮ࢆゎᯒࡋ࡚ࠊ㛫࡛㉳ࡇࡿ 㐣⛬ࢆྠᐃࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋ ᅗ*#࡟ほ ࡉࢀࡓ㐣⛬ࢆᅗ♧ࡋࠊᅗ*࡟ࡇࡢ࡜ࡁ⏕ᡂࡍࡿ^'࡜^'ࡢ㐠ື࢚ࢿࣝࢠ࣮ࡢ࿴

㸦;<>? $㸧࡜㟁Ꮚࡢ࢚ࢿࣝࢠ࣮࡜ࡢ┦㛵ᅗࢆ♧ࡋࡓࠋ

ᮏ◊✲ࡣࠊᏛ᣺࠿ࡽࡢ᥼ຓࢆᚓ࡚ࠊி㒔኱Ꮫࠊ⏘ᴗᢏ⾡⥲ྜ◊✲ᡤࠊ㧗㍤ᗘග⛉Ꮫ◊✲ࢭࣥࢱ࣮࡜

ࡢඹྠ◊✲࡜ࡋ࡚㐙⾜ࡋࡓࠋ

[8.1] T. Ouchi et al. to be submitted.

䢳䢶䢲 䢳䢴䢲 䢳䢲䢲 䢺䢲 䢸䢲 䢶䢲 䢴䢲 䢲

䣅䣱䣷䣰䣶䣵

䢳䢸 䢳䢶 䢳䢴 䢳䢲 䢺 䢸 䢶 䢴

䢲 䣍䣇䣔䢢䢪䣧䣘䢫

_䢹䢲

䢸䢲 䢷䢲 䢶䢲 䢵䢲 䢴䢲

䣅䣱䣷䣰䣶䣵

䢴䢲 䢳䢷

䢳䢲 䢷

䢲 䣇䣮䣧䣥䣶䣴䣱䣰䢢䣧䣰䣧䣴䣩䣻䢢䢪䣧䣘䢫 Fig. 8.2. (a) KER distribution for Ne²⁺-Ar⁺ pair coincident formation at the photon energy of 889 eV;

(b) Electron kinetic energy spectrum coincident with Ne²⁺-Ar⁺ pair at the photon energy of 889 eV.

(a) (b)

Ne 1s Photoe -2s^-12p^{-1 1}P

ICD 2s^-12p^{-1 3}P ICD

Fig. 8.1. Schematic energy diagram for the states involved in the interatomic Coulombic decay in NeAr.

Fig. 1. UV-Vis transmittance spectra of various compounds

࠙

࠙◊✲άືሗ࿌ࠚ ↓ᶵ⣔ᇶ┙ࢩࢫࢸ࣒◊✲ศ㔝

^{㸦2009㸬1㹼2009㸬12㸧}

ᩍ ᤵ

㸸బ⸨ḟ㞝

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