SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟
2015A1725                 Section B        BL19B2㓟໬ࡋࡓ㧗⣧ᗘ㕲⟩ࡢ࢞ࢫᾐⅣ࡟࠾ࡅࡿ཯ᛂᣲືࡢࠊX ⥺ᅇᢡἲ࡟ࡼࡿ
ࡑࡢሙศᯒ
In-Situ Analysis of Property at Carburizing from Oxidized High Purity FeFoil with X-ray Diffraction Image኱ஂಖ ⥲୍㑻, 㣤ཎ 㡰ḟ, ୖᮧ 㔜᫂, ᪥᪉ ጾ, ㇂ᒸ ኱㍜, ୰஭ 㱟㈨Soichiro Okubo, Junji Iihara, Shigeaki Uemura, Takeshi Hikata, Daisuke Tanioka, Ryusuke Nakaiఫ཭㟁Ẽᕤᴗᰴᘧ఍♫ Sumitomo Electric Industries, Ltd.
 㕲⟩ࢆ኱Ẽ㓟໬ࡋࡓᚋ࡟ࠊ㧗 ࡢ࢔ࢭࢳࣞࣥ࢞ࢫ㞺ᅖẼ୰࡛ฎ⌮ࡍࡿ࡜ࠊ⇕ட⿣ࡢෆ㒊࡟ࢧࣈ࣑ࢡࣟࣥࡢᖜࢆᣢࡘⅣ⣲⧄⥔㸦ࢳ࣮ࣗࣈࡸࢩ࣮ࢺ㸧ࡀட⿣ࡢ୧ഃࢆࣈࣜࢵࢪࡍࡿࡼ࠺࡟ᡂ㛗ࡍࡿ⌧㇟ࢆⓎぢࡋࡓࠋࡇࡢ⌧㇟ࢆ฼⏝ࡍࢀࡤࠊ┤⥺ⓗ࡞ࢼࣀ࣮࢝࣎ࣥࡀᡂ㛗࡛ࡁࠊ᪂つࢹࣂ࢖ࢫసᡂᡭἲ࡟ᛂ⏝࡛ࡁࡿࠋⅣ⣲ࡀᘬࡁฟࡉࢀࡿ࣓࢝ࢽࢬ࣒ࢆゎ᫂ࡍࡿࡓࡵࠊຍ⇕࣭࢞ࢫᾐⅣᕤ⛬୰࡟㏱
㐣 X ⥺ᅇᢡീࢆࡑࡢሙほᐹࡍࡿࡇ࡜ࢆヨࡳࡓࠋ࣮࣮࢟࣡ࢻ㸸 ࣮࢝࣎ࣥࢼࣀࢳ࣮ࣗࣈࠊ㧗⣧ᗘ㕲⟩ࠊ㏱㐣 X ⥺ᅇᢡἲࠊ㓟໬㕲ࠊ࢞ࢫᾐⅣ⫼ᬒ࡜◊✲┠ⓗ㸸࣮࢝࣎ࣥࢼࣀࢳ࣮ࣗࣈ㸦௨ୗ CNT㸧ࡣ㸯ḟඖᵓ㐀࡟ࡼࡿ㧗࠸ᑟ㟁ᛶࢆᣢࡕࠊḟୡ௦ࡢᑟ㟁ᮦᩱ࡜ࡋ࡚ᮇᚅࡉࢀ࡚࠸ࡿࠋᙜ♫࡛ࡣࠊᑗ᮶ࠊ㈨※ࡢᯤῬࡢྍ⬟ᛶࡀ࠶ࡾࠊ౯᱁ࡢ஘㧗ୗ࡟ࡼࡿཎᩱࡢ౪⤥୙Ᏻᐃࡢᚰ㓄ࡀ⥆ࡃ㖡࡟ኚࢃࡿḟୡ௦ࡢ㟁⥺ᮦᩱ࡜ࡋ࡚ࠊCNT ࢆ⏝࠸ࡓ㟁⥺ࡢ〇ရ໬ࢆ┠ᣦࡋ࡚◊✲㛤Ⓨࢆ㐍ࡵ࡚࠸ࡿࠋࡋ࠿ࡋࠊ⌧ᅾࡢ CNT ᡂ㛗᪉ἲ࡟࠾࠸࡚ࡣࠊ1 ᮏࡢ㛗ࡉࡀ᭱኱࡛ࡶ㸯ࢭࣥࢳ⛬ᗘ࡛࠶ࡾࠊ㏻ᖖࡢ኱㔞⏕⏘᪉ᘧ࡛ࡣᩘ༑ ȝP ⛬ᗘ࡛࠶ࡿࠋ㛗ᑻ⥺ᮦ࡜ࡋ࡚ࡣࠊ▷࠸ CNT⧄⥔ࢆ⣳࠸ࡔ౛ࡀ࠶ࡿࡀࠊ⧄⥔㛫ࡢ᥋ゐ᢬ᢠ࡟ࡼࡾ⣳⣒⥺඲యࡢ㟁Ẽ≉ᛶࡀᨭ㓄ࡉࢀࠊCNT ᮏ᮶ࡢ㟁Ẽ≉ᛶࢆᐇ⌧࡛ࡁ࡚࠸࡞࠸ࠋ ୍⯡ⓗ࡟ CNT ࢆᡂ㛗ࡉࡏࡿᡭἲ࡜ࡋ࡚ࡣࠊFe ࡸ Ni ࡞࡝ࠊゐ፹࡜࡞ࡿ㔠ᒓࡢࢼࣀ⢏Ꮚ࡟Ⅳ໬Ỉ⣲࢞ࢫࢆ㧗 ࡛స⏝ࡉࡏ࡚ࠊ㣬࿴ࡋࡓᅛ⁐Ⅳ⣲ࡀ⢏Ꮚ⾲㠃࠿ࡽᯒฟࡍࡿࡶࡢ࡛࠶ࡾࠊ┤⥺ᛶࡀᝏࡃࠊ✵㛫ไᚚᛶࡀ㠀ᖖ࡟ᝏ࠿ࡗࡓࠋ ᙜ♫࡟࠾࠸࡚ࡣࠊCNT ⧄⥔ 1 ᮏࢆ㐃⥆ⓗ࣭㛗ᑻᡂ㛗᪉ἲࢆ◊✲ࡍࡿ୰࡛ࠊ⣧㕲⟩ࢆ㓟໬ࡋࡓᚋ࡟㧗 ࡢⅣ໬Ỉ⣲࢞ࢫ୰࡛ᾐⅣࢆ⾜࠺࡜ࠊ⾲㠃࡟Ⓨ⏕ࡋࡓட⿣ࡢ㛫࡟ࠊ࠶ࡓ࠿ࡶ⣡㇋ࡀ⣒ࢆᘬࡃࡼ࠺࡟࣮࢝࣎ࣥࢼࣀ⧄⥔ࡀᘬࡁฟࡉࢀࡿࡇ࡜ࢆぢ࠸ࡔࡋࡓࠋ[1]ᮏ⌧㇟ࢆᛂ⏝ࡍࡿ࡜ࠊⅣ⣲ࢆ㐣๫࡟ᅛ⁐ࡋࡓࣂࣝࢡࡢ㔠ᒓయ࠿ࡽᘬࡁฟࡉࢀࡿࡓࡵࠊᘬࡗᙇࡾ᪉ྥ࡟ᩚิࡋࠊ఩⨨ไᚚࡀᐜ᫆࡜࡞ࡾࠊ㟁Ꮚࢹࣂ࢖ࢫࡸᑟ㟁యࠊᵓ㐀ᮦᩱ࡜ࡋ࡚ࡢ⏘ᴗ฼⏝ࡀྍ⬟࡜࡞ࡿࠋ㐃⥆ᡂ㛗ࡋࡓ㛗ᑻࡢ CNT ࢆ౑⏝ࡍࡿࡇ࡜࡛ࠊࡑࡢ⧄⥔ࡢ 1 ᮏࡢ㛗ࡉࡀ㛗ࡃ࡞ࡿ࡯࡝ࠊ⧄⥔ྠኈࡢ᥋ゐⅬࡀᑡ࡞ࡃ࡞ࡾ㟁⥺඲య࡛ࡢ᥋ゐ᢬ᢠࡀ⧄⥔㛗ࡉ࡟཯ẚ౛ࡋ࡚పῶࡉࢀࠊ✵㛫ไᚚᛶⰋࡃᡂ㛗ࡉࡏࡿࡇ࡜࡛Ᏻᐃࡋ࡚᧍ࡾྜࢃࡏࡿࡇ࡜ࡶ࡛ࡁࡿࡓࡵࠊ㖡࡜ྠ➼௨ୖࡢ㧗࠸ᑟ㟁ᛶࢆᣢࡗࡓ CNT ༢⧄⥔ᮏ᮶ࡢ≉ᛶࢆᣢࡘ㟁⥺ࢆᐇ⌧࡛ࡁࡿࠋࡲࡓࠊ఩⨨ไᚚࡢᐜ᫆ࡉࢆ฼⏝ࡋ࡚㟁Ꮚࢹࣂ࢖ࢫ࡬ࡢᛂ⏝ࡶ㐍ࡴ࡜⪃࠼ࡽࢀࡿࠋࡉࡽ࡟ࠊ㛗ᑻ⧄⥔໬ࡍࡿࡇ࡜࡛ࠊ㗰㕲⥺ࢆ෽㥙ࡍࡿࠊ
CNT ༢⧄⥔ࡢᘬࡗᙇࡾᙉᗘࢆᣢࡘᵓ㐀ᮦᩱ࡜ࡋ࡚ࡢ⏘ᴗ฼⏝ࡀྍ⬟࡜࡞ࡿࠋⅣ⣲ཎᩱࡢ౪⤥ࢆ⥆ࡅࡿࡇ࡜࡛ࠊ㐃⥆ⓗ࡟㛗ᑻࡢ CNT ࢆ㔞⏘࡛ࡁࡿྍ⬟ᛶࡀ࠶ࡿࠋ ᮏ⌧㇟࡟ࡘ࠸࡚ࡣࠊ㧗⣧ᗘ㕲⏤᮶ࡢ㓟໬㕲࠿ࡽ㧗 Ⅳ໬Ỉ⣲࢞ࢫ࡛ᾐⅣࡋࡓሙྜ࡟ࡢࡳほᐹࡉࢀࡿࡀࠊࡑࡢᡂ㛗࣓࢝ࢽࢬ࣒ࡣࡲࡔ᫂ࡽ࠿࡜࡞ࡗ࡚࠸࡞࠸ࠋᐇ㦂ᐊ࡛ࡣ㧗 ࣭࢔ࢭࢳࣞࣥ㞺ᅖẼ࡛ࡢ཯ᑕ X ⥺ᅇᢡἲ࡛ࡢศᯒࢆᐇ᪋ࡋࡓࡀࠊ㧗 ฎ⌮࡛ࡢ཯ᑕ X ⥺ᅇᢡ࡛ࡣฎ⌮୰ࡢ Fe ࡢኚᙧࡀ኱ࡁࡃ⌧㇟ࡢゎ᫂࡟⮳ࡗ࡚࠸࡞࠸ࠋࡲࡓࠊࡇࡢ ᐃ⣔࡛ࡣゅᗘࢫ࢟ࣕࣥࡀᚲせ࡛࠶ࡾ 1 ᅇࡢ䠉㻞㻞㻠䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟

Section Bᐃ࡟ 20 ศ࠿ࡽ 40 ศ࠿࠿ࡿࡓࡵࠊ௒ᅇࡢࡼ࠺࡞᪩࠸཯ᛂ࡟࠾ࡅࡿ⤖ᬗ⣔ࡢࡑࡢሙ࣭㐃⥆ほᐹࡣ኱ኚᅔ㞴࡛࠶ࡗࡓࠋ ୖグ⫼ᬒࡢࡶ࡜ࠊ㓟໬ࠊᾐⅣࠊ෭༷㐣⛬࡛ࡢ㕲࠾ࡼࡧⅣ⣲ࡢ⤖ᬗᵓ㐀ኚ໬ࢆゎᯒࡋࠊCNT ᡂ㛗ࡢᶵᵓࢆ᫂ࡽ࠿࡟ࡍࡿࡓࡵ࡟ࡣࠊᕤ⛬୰ࡢ㞺ᅖẼไᚚࢆ⾜࠸࡞ࡀࡽ▼ⱥ࢞ࣛࢫᐜჾෆ࡟⨨࠸ࡓࢧࣥࣉࣝࢆほᐹࡋࠊࡉࡽ࡟ᕤ⛬୰ࡢࢧࣥࣉࣝࡢ኱ࡁ࡞ኚᙧ࡟ࡶᑐᛂࡍࡿࡓࡵࠊ㧗㍤ᗘࡢᨺᑕගࢆ⏝࠸ࡓࠕ㏱㐣 ᐃࠖࡀ୙ྍḞ࡛࠶ࡿࠋᐇ㦂㸸௒ᅇࡢᐇ㦂࡟࠾࠸࡚タ⨨ࡋࡓ ᐃࢩࢫࢸ࣒ࡢᴫせࢆ Fig. 1 ࡟♧ࡍࠋᐇ㦂ヨᩱ࡟ࡣཌࡉ 50 ȝP ࡢ㉸㧗⣧ᗘ(5N)ࡢ㕲⟩ࢆ⏝࠸ࡓࠋⅣ໬Ỉ⣲࢞ࢫࡣࠊHe ᕼ㔘 2%C2H2 ࢞ࢫࢆ⏝࠸ࡓࠋ㕲⟩ヨᩱࡣࠊ‫׋‬7mm ࡢ X ⥺㏱㐣Ꮝࢆ᭷ࡍࡿ࣮࢝࣎ࣥ἞ල(Fig. 2)࡟ಖᣢࡋࠊ㞺ᅖẼไᚚྍ⬟࡞ࡼ࠺࡟ࠊ▼ⱥࢳࣕࣥ
ࣂ(Fig. 3)ෆ࡟タ⨨ࡋࡓヨᩱ࡟ ᗘ ᐃ⏝ࡢ⇕㟁ᑐࢆ᥋ゐࡉࡏࠊ࢖࣓࣮ࢪຍ⇕⿦⨨ࡢไᚚࢆ⾜ࡗࡓࠋຍ⇕ࡣࠊ࢖࣓࣮ࢪຍ⇕࡜ࡋࠊ▼ⱥࣟࢵࢻ࡟ࡼࡾ㉥እ⥺ᑟධࢆ⾜ࡗࡓࠋࢧࣥࣉࣝࢆᑒධࡋࡓ▼ⱥ࢞ࣛࢫࢳࣕࣥࣂࡣ Huber ♫ࡢከ㍈ᅇᢡ⿦⨨࡟ᅛᐃࡋࡓࠋ
 BL19B2 ࡟࠾࠸࡚ X ⥺ࡢ࢚ࢿࣝࢠ࣮ࡣ 30 keV ධᑕගࢧ࢖ࢬᶓ 3 mm ⦪ 0.3 mmࠊ࣓࢝ࣛ㛗ࡣ335.03 mm㸦ᶆ‽ヨᩱ CeO2 ࡢᅇᢡࣃࢱ࣮ࣥࢆ⏝࠸࡚ᰯṇ㸧ࠊヨᩱᚋ᪉࡟タ⨨ࡋࡓ 2 ḟඖ᳨ฟჾPILATUS-300K ࡟࡚ᅇᢡീࢆྲྀᚓࡋࡓࠋྲྀᚓࡋࡓ 2 ḟඖᅇᢡീࡣ෇⎔ᖹᆒ᧯స࡛ 1 ḟඖ໬ࡋࡓࠋFig. 1࣮࢝࣎ࣥ἞ලᐃࢩࢫࢸ࣒ࡢᴫ␎ᅗ᤼Ẽ࢞ࢫᑟධ

Fig. 2 ࣮࢝࣎ࣥ἞ලFig. 3 ▼ⱥ⟶࡜ࢫࢸ࣮ࢪタ⨨≧ែ   㸦2 ḟඖ᳨ฟჾഃ࠿ࡽ᧜ᙳ㸧࣭ࢧࣥࣉࣝࡢຍ⇕࡟ࡣࠊࢧ࣮ࣔ⌮ᕤ♫〇ࡢ㉥እ⥺ຍ⇕⿦⨨࣭GVL298 ࢆ⏝࠸ࠊ▼ⱥ࢞ࣛࢫࢳࣕࣥࣂෆࡢ࣮࢝࣎ࣥ἞ලࢆ࢖࣓࣮ࢪຍ⇕ࡋࡓࠋ࣭⇕ฎ⌮ࡢ᮲௳ࡣࠊ኱Ẽ୰࣭ᐊ ࠿ࡽ 40°௚/min ࡛ 850°௚ ࡟᪼ ࡋ㕲⟩ࢆ㓟໬ࡉࡏࠊࡑࡢᚋ 850°௚࣭
He100 ml/min ࣇ࣮ࣟ୰࡛ 10 ศಖᣢࡋࡓᚋ He ᕼ㔘 2%C2H2 ࢞ࢫࣇ࣮ࣟ࡟ษ᭰࠼ 850°௚ ࢆಖᣢࡋࡓࠋࢧࣥࣉࣝࡢᅇᢡീࡢኚ໬ࡀ⤊஢ࡋࡓ࡜ุ᩿ࡋࡓᚋࠊ෌ᗘ He100 ml/min ࢞ࢫࣇ࣮ࣟ࡟ษ᭰࠼ࠊ㝆ᕤ⛬࡟㐍ࡵࡓࠋ㝆 ᕤ⛬୰ࡢ 850㹼700°௚ ࡣ 10°௚/min ࡛㝆 ࡋࠊ700°௚ ௨ୗࡣ 40°௚/min ࡛㝆 ࡋࡓࠋ䠉㻞㻞㻡䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟Section B⤖ᯝ࠾ࡼࡧ⪃ᐹ㸸࣭⏕ᡂࡋࡓ≀㉁ࡢྠᐃࡣࠊᐊ ࡛ ᐃࢆ⾜ࡗࡓ Fe ➨୍ࣆ࣮ࢡࢆᶆ‽࡜ࡋ࡚ JCPDS ࡢࢹ࣮ࢱ࡜ẚ㍑ࡋ࡚⾜ࡗࡓࠋ㸯㸧ึᮇ ᐃ㸸኱Ẽ୰ࠊᐊ ࡟࡚ Fe ⟩ࡢ X ⥺ᅇᢡീࢆྲྀᚓࠋ㟢ග 10 ⛊࡛༑ศ࡞ᅇᢡീࢆᚓࡽࢀࡿࡇ࡜ࢆ☜ㄆࡋࡓࠋ⣧ Fe ࡢᐊ ࡛ࡢᅇᢡീࡣ Fig. 4-1 ࡟ࠊ1 ḟඖ໬ࡋࡓࢢࣛࣇࡣ Fig. 4-2 ࡟♧ࡍࠋ

Fig. 4-1 ⣧㕲⟩ࡢᅇᢡീ

Fig. 4-2 ⣧㕲⟩ࡢᅇᢡീ࣭1 ḟඖ໬ᅗ㸰㸧㓟໬ᕤ⛬㸸▼ⱥࢳࣕࣥࣂ኱Ẽ୰࡛ 40°௚/minࠊ850°௚ ࡲ࡛᪼ ࢆ⾜࠸ࠊ኱Ẽ୰㓟໬ࢆ⾜ࡗࡓࠋ ⇕⭾ᙇ࡟క࠸ࠊ⣧㕲ࡢᅇᢡࣜࣥࢢ┤ᚄࡣᑠࡉࡃ࡞ࡾࠊࡑࡢᚋࠊ㓟໬㕲㸸FeO ࡜ᛮࢃࢀࡿᅇᢡീࡀฟ⌧ࡋࡓࠋᅇᢡീࡣ Fig. 5-1 ࡟ࠊ1 ḟඖ໬ࡋࡓࢢࣛࣇࡣ Fig. 5-2 ࡟♧ࡍࠋ

Fig. 5-1 850qC 㓟໬ᕤ⛬୰ࡢᅇᢡീ Fig. 5-2 㓟໬ᕤ⛬୰ࡢᅇᢡീ࣭1 ḟඖ໬ᅗ㸱) 㑏ඖ࣭ᾐⅣᕤ⛬㸸㓟໬ᕤ⛬ᚋࠊ▼ⱥࢳࣕࣥࣂ୰࡟ He ⨨᥮ࢆ⾜࠸࡞ࡀࡽ 850°௚ ࡛ 10 ศ㛫ಖᣢ
ࡋࡓᚋࠊ850°௚ Ⅳ໬Ỉ⣲࢞ࢫࢆ 10 ml/min ࡛ᑟධࡋࠊ㐃⥆ⓗ࡟ᵓ㐀ࡢኚ໬ࢆほᐹࡋࡓࠋ㑏ඖࡀ㐍⾜
ࡋࠊFeO ࡢࣜࣥࢢ࡜࡜ࡶ࡟ࠊ㕲ࡢⅣ໬≀࣭ࢭ࣓ࣥࢱ࢖ࢺ㸦Fe3C㸧࡜ᛮࢃࢀࡿከᩘࡢࣜࣥࢢࡀฟ⌧ࡋࡓࠋ850°௚ ಖᣢ࣭཯ᛂ᭱⤊ẁ㝵࡟࠾ࡅࡿࠊᅇᢡീࢆ Fig. 6-1 ࡟ࠊ1 ḟඖ໬ࡋࡓࢢࣛࣇࡣ Fig. 6-2࡟♧ࡍࠋ஧ḟඖീ࡟࠾࠸࡚ࠊࣜࣥࢢ࠿ࡽࢫ࣏ࢵࢺ≧࡟࡞ࡗ࡚࠸ࡿࡀࠊ⤖ᬗ⢏Ꮚࡢ⢒⢏໬࡟క࠺ࡶࡢ࡜⪃࠼ࡽࢀࡿࠋ㸲㸧㝆 㸸850°௚ ࡛ࡢほᐹ࡟࠾࠸࡚ࠊᅇᢡീࡢኚ໬ࡀ↓ࡃ࡞ࡗࡓ࡜ุ᩿ࡉࢀࡓ᫬Ⅼ࡛ࠊⅣ໬Ỉ⣲࢞ࢫࢆṆࡵࠊHe ࡟ษࡾ᭰࠼ 850°௚㹼700°௚ ࡲ࡛ࡣࠊ10°௚/min タᐃ࡟࡚㝆 ࡋࡓࠋȖĺĮ ኚែⅬ㸦450°௚௜㏆㸧ࡣప㏿࡛ࠊࡑࡢᚋࡣ 40°௚/min ࡛㝆 ࡋࡓࠋ㝆 ᫬࡟ࡣ Fe ࡢ Ȗ ┦ࠊĮ ┦࡜ᛮࢃࢀࡿᅇᢡീ
ࡣ࠸ࡎࢀࡶほᐹࡉࢀࡎࠊFe ࡢ┦㌿⛣࡟㛵ࡋ࡚ࡣホ౯࡛ࡁ࡞࠸ࠋ㝆 ᚋ 190°௚ ௜㏆࡛ࡢᅇᢡീࡣ㓟໬㕲 FeO ࡜Ⅳ Fe3O4 ࡜ᛮࢃࢀࡿᅇᢡീࡀほᐹࡉࢀ(Fig. 7-1, 2)ࠊ௒ᅇࡢ࢞ࢫ⃰ᗘ࡟࠾࠸࡚ࡣࠊ㓟໬㕲┦ࡀ࠶ࡿ≧ែ࡛ࠊᾐⅣ㑏ඖ࡜ Fe3C ࡢ⏕ᡂࡀ㉳ࡇࡗࡓᚋࠊFeO ࡀ Fe3O4 ࡟ኚ໬ࡋ࡚࠸ࡿࡇ࡜ࡀ♧
၀ࡉࢀࡓࠋ

䠉㻞㻞㻢䠉

SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟

Section BFig. 6-1 ᾐⅣᕤ⛬ᚋࡢᅇᢡീ  Fig. 6-2 ᾐⅣᕤ⛬ᚋࡢᅇᢡീ࣭1 ḟඖ໬ᅗ

Fig. 7-1 㝆 ᚋࡢᅇᢡീ    Fig. 7-2 㝆 ᚋࡢᅇᢡീ࣭1 ḟඖ໬ᅗ௒ᚋࡢㄢ㢟㸸࣭኱Ẽ㞺ᅖẼ࡛ࡣ 850°௚ ࢆಖᣢ࡛ࡁࡓࡀࠊᾐⅣᕤ⛬ᚋ࡟࠾࠸࡚ࡣࠊⅣ໬Ỉ⣲࢞ࢫࡢᑟධ࡟క࠸ࠊᛴ⃭࡟ ᗘࡀపୗࡍࡿ࡞࡝ ᗘࡢไᚚࡀ㞴ࡋ࠿ࡗࡓࠋࡇࢀࡣࠊⅣ໬Ỉ⣲ᕼ㔘⏝ࡢ He ࢞ࢫ࡟ࡼࡿ⇕㍺㏦ࡀ኱ࡁ࠿ࡗࡓࡓࡵ࡜⪃࠼ࡽࢀࡿࠋ኱Ẽ୰࡛ࡢ㓟໬᫬ࡣ ᗘไᚚࡉࢀ࡚࠸ࡓࡇ࡜࠿ࡽࠊᾐⅣᕤ⛬࡟࠾࠸࡚ࡶࠊ❅⣲ᕼ㔘ࡢⅣ໬Ỉ⣲࢞ࢫࢆ౑⏝ࡋ࡚ฎ⌮ࢆ⾜࠺ࡇ࡜࡛ࠊ ᗘࡢᏳᐃ໬ࡀྍ⬟࡜⪃࠼ࡓࠋ࣭ࡲࡓࠊ࣮࢝࣎ࣥ἞ලࡢୗ㠃࡟ᑠᆺࡢࣄ࣮ࢱ࣮ࢆྲྀ௜ࡅࡿࡇ࡜࡛ࡼࡾᏳᐃ໬࡛ࡁࡿ࡜⪃࠼ࠊ࢜ࣇ
ࣛ࢖࡛ࣥ㏣ຍᐇ㦂ࢆ⾜ࡗࡓ࡜ࡇࢁࠊᾐⅣᕤ⛬࡟࠾࠸࡚ࡶ ᗘࡢᏳᐃไᚚࡀ࡛ࡁࡿࡇ࡜ࢆ☜ㄆ࡛ࡁࡓࠋ௒ᚋࡣࠊ❅⣲ᕼ㔘ࡢⅣ໬Ỉ⣲࢞ࢫ࡜⿵ຓࣄ࣮ࢱ࣮௜ࡁࡢ἞ල࡟ኚ᭦ࡋ࡚ᐇ㦂ࢆ⾜࠺ࠋཧ⪃ᩥ⊩㸸[1] T. Hikata, et al., AIP Advances 3, 042127 (2013)(Received: September 25, 2018; Early edition: February 26, 2019,
Accepted: July 16, 2019; Published: August 29, 2019䠉㻞㻞㻣䠉