Fe ♽ว㊄ಝ࿕ㆊ⒟ߩߘߩ႐ⷰኤᛛⴚߩ㐿⊒ߣᔕ↪
⎇ⓥઍ⴫⠪ ᄢ㒋ᄢቇᄢቇ㒮Ꮏቇ⎇ⓥ⑼ ᢎ᝼ ቟↰⑲ᐘ㧝㧚ߪߓ߼ߦ ‫ⷰޟ‬ኤ‫⑼ߊߥ߽ߢ߹߁޿ޔߪޠ‬ቇߩၮᧄߢ޽ࠆ߇‫ⷰࠍࠬࠢ࠶ࡒ࠽ࠗ࠳ޔ‬ኤߔࠆᚻᲑࠍᜬߚߥ޿ߎߣ߇‫⎇ޔ‬ⓥಽ㊁ߩ⊒ዷ߿ዷ㐿ߩ㓚ოߦߥߞߡ޿ࠆ଀ߪዋߥߊߥ޿‫Ⲣޕ‬ὐ߇㜞ߊ‫ޔ‬นⷞశߦኻߒߡਇㅘ᣿ߢ޽ࠆ㋕㍑᧚ᢱߦ߅ߌࠆಝ࿕⚵❱೙ᓮ߽ߘߩ৻ߟߣ⠨߃ࠄࠇࠆ‫ޔ߫߃଀ޕ‬ㅪ⛯㍌ㅧࠍߪߓ߼ಝ࿕ࡊࡠ࠮ࠬߪ‫ޔ‬㍌ ຠ⾰ߦᄢ߈ߥᓇ㗀ࠍਈ߃ࠆࡊࡠ࠮ࠬߢ޽ࠅ‫ޔ‬ຠ⾰ะ਄‫↥↢ޔ‬ᕈะ਄ߩߚ߼ߦ‫੺ޔ‬࿷‛‫ޔ‬஍ᨆ‫ޔ‬ഀࠇߥߤ㕟ᣂߔߴ߈⺖㗴߇޽ࠆ߇‫ޔ‬㜞᷷⃻⽎ߢ޽ࠆ㍑ߩಝ࿕ߥࠄ߮ߦᰳ㒱ᒻᚑㆊ⒟ࠍታ⸽⊛ߦℂ⸃ߔࠆᚻᲑ߇ߥ޿
ߎߣ߇㓚ოߣߥߞߡ޿ࠆ‫ޕ‬
 SPring-8 ߥߤ╙ਃ਎ઍ᡼኿శߣ๭߫ࠇࠆ᡼኿శᣉ⸳ߢߪ‫ޔ‬㜞ノᐲߩ⎬ X ✢㗔ၞߩන⦡శ߇೑↪ߢ߈ࠆߚ߼‫ޔ‬㊄ዻ᧚ᢱࠍኻ⽎ߦ࠺ࡦ࠼࡜ࠗ࠻ߥߤߩࡒࠢࡠ⚵❱ߩࠬࠤ࡯࡞ࠃ
ࠅචಽߦෘ޿⹜ᢱߩๆ෼௝ߦ߅޿ߡ߽චಽߥㅘㆊᒝᐲ߇ᓧࠄࠇ‫ޔ‬㜞޿ⓨ㑆ಽ⸃⢻ߩ X✢ࠗࡔ࡯ࠫࡦࠣ߇น⢻ߢ޽ࠆ‫ޔߦࠄߐޕ‬㜞ⓨ㑆ಽ⸃⢻࡮㜞ᤨ㑆ಽ⸃⢻ᬌ಴ེߩ㐿⊒߿ X✢శቇ♽ߩᡷ⦟ߦࠃࠅ‫ޔ‬Sn ว㊄‫ޔ‬Al ว㊄ߩಝ࿕ㆊ⒟ߩߘߩ႐ⷰኤ㧔Time-resolved X-rayimaging㧕߇ႎ๔ߐࠇߡ޿ࠆ[1-13]‫ޕ‬᡼኿శࠍ↪޿ߚࠗࡔ࡯ࠫࡦࠣᛛⴚߪ㊄ዻ᧚ᢱࠍᆎ߼ߣߒߚ᧚ᢱߩಝ࿕࡮⚿᥏ᚑ㐳ㆊ⒟ߩⷰኤߦᔕ↪ߢ߈ࠆⅣႺ߇ᢛ޿ߟߟ޽ࠆ‫ޔߒ߆ߒޕ‬Ყセ⊛㜞Ⲣὐߢ޽ࠆ㋕㍑᧚ᢱߩಝ࿕ㆊ⒟ߩⷰኤߪ‫⹜ޔ‬ᢱ࠮࡞ߥߤߩᛛⴚ⊛࿎㔍ߐߩߚ߼߹ߞߚߊႎ๔ߐࠇߡ޿ߥ߆ߞߚ‫⎇ᧄޕ‬ⓥߢߪ‫ޔ‬㋕㍑᧚ᢱߩಝ࿕ㆊ⒟ߩⷰኤᛛⴚࠍ㐿⊒ߒ‫ޔ‬ಝ࿕⃻⽎ߩታ⸽⊛ℂ⸃ࠍน⢻ߦߔࠆ࠷࡯࡞ߣߒߡ೑↪ߔࠆߎߣࠍ⋡ᜰߒߚ‫ޕ‬ ಝ࿕ㆊ⒟ߩߘߩ႐ⷰኤࠍⴕ߁ߎߣߩᗧ⟵ߪ‫ޔ‬ኻ⽎ߣߔࠆ᧚ᢱߩ‫ޟ‬୘ᕈ‫ࠍޠ‬ℂ⸃ߢ߈ࠆὐߦ޽ࠆ‫ޕ‬㊄ዻ᧚ᢱߩᄙߊߪ࠺ࡦ࠼࡜ࠗ࠻ᒻᘒߢಝ࿕ߔࠆߎߣߪ๟⍮ߩ੐ታߢ޽ࠆ߇‫ޔ‬⇇㕙ࠛࡀ࡞ࠡ࡯‫ޔ‬᜛ᢔଥᢙߥߤߩ‛ᕈ୯ߦࠃࠅ᳿߹ࠆ࠺ࡦ࠼࡜ࠗ࠻ߩᒻ⁁㧔వ┵ߩᦛ₸ඨᓘ‫ࡓ࡯ࠕޔ‬㑆㓒‫ࡦ࡚ࠪ࡯࠹ࡦࡔࠣ࡜ࡈޔ‬㧔ṁᢿ㧕ߩߒ߿ߔߐ‫ࡓ࡯ࠕ߿⇇☸ޔ‬㑆ߥߤߩࡒࠢࡠ஍ᨆߩᒻᘒߥߤ㧕ߪ᧚ᢱߩ‫ޟ‬୘ᕈ‫߇ޠ‬෻ᤋߐࠇߡ޿ࠆ‫ޕ‬㜞ᐲߥ⚵❱೙ᓮࠍታ⃻ߔࠆߦߪ‫ޔ‬ᄙߊߩ᧚ᢱߦ౒ㅢߔࠆ․ᓽߛߌߢߥߊ‫᧚ߩߘޔ‬ᢱߩ‫ޟ‬୘ᕈ‫ࠍޠ‬⍮ࠆߎߣ߇㊀ⷐߦߥࠆ‫ޕ‬ಝ࿕ㆊ⒟ߩⷰኤߪ‫ޔ‬୘ᕈࠍታ⸽⊛ߦℂ⸃ߢ߈ࠆᚻᲑߢ޽ࠅ‫⎇ᧄޔ‬ⓥࠍㅢߓߡ
Fe ว㊄ߩⷰኤ߇น⢻ߦߥࠅߟߟ޽ࠆ[14,15]‫ޕ‬ ౕ૕⊛ߥ⎇ⓥౝኈߪ‫ޔ‬એਅߩㅢࠅߢ޽ࠆ‫ޕ‬㧝㧕㋕㍑᧚ᢱࠍኻ⽎ߣߒߡ‫ޔ‬᡼኿శࠍ೑↪ߒߚಝ࿕ߩߘߩ႐ⷰኤ㧔ๆ෼ࠦࡦ࠻࡜ࠬ࠻㧕ࠍน⢻ߦߔࠆಝ࿕ⷰኤἹ‫⹜ޔ‬ᢱ࠮࡞᭴ㅧߥߤߩታ㛎ᛛⴚߩၮ␆ࠍ⏕┙ߔࠆ‫ޕ‬㧞㧕࿕⋧ߣᶧ⋧ߩๆ෼ࠦࡦ࠻࡜ࠬ࠻߇Ყセ⊛ᄢ߈޿ (G5K ♽ว㊄ߩߘߩ႐ⷰኤࠍⴕ޿‫ޔ‬Ყセ⊛ࠦࡦ࠻࡜ࠬ࠻ߩᄢ߈޿㋕㍑᧚ᢱߩಝ࿕ⷰኤߦᔅⷐߥᛛⴚࠍ⏕┙ߔࠆ‫ޕ‬㧟㧕ߘߩ႐ⷰኤߐࠇߚ↹௝ࠍ⸃ᨆߒ‫ࡓ࡯ࠕ࠻ࠗ࡜࠼ࡦ࠺ޔ‬㑆ߥߤߩỚᐲಽᏓ᷹ቯߥߤ߳ߩᔕ↪ࠍ⹜ߺࠆ‫ޕ‬㧠㧕㐿⊒ߒߚᛛⴚࠍၮ␆ߦ‫ޔ‬ᐢ᳢ߥ㋕㍑᧚ᢱߩಝ࿕⃻⽎ࠍⷰኤߔࠆߚ߼ߩᛛⴚ⊛⺖㗴ࠍ᣿⏕ߦߒ‫੹ޔ‬ᓟߩዷ㐿ࠍ᣿ࠄ߆ߦߔࠆ‫ޕ‬㧞㧚ߘߩ႐ⷰኤᚻᴺߩ㐿⊒
2.1 Ἱ‫⹜ޔ‬ᢱ࠮࡞ߩ㐿⊒ ㋕㍑᧚ᢱߩಝ࿕ㆊ⒟ߩⷰኤߦ߅޿ߡ᳞߼ࠄࠇࠆታ㛎ᛛⴚߪ‫ޔ‬㧝㧕X ✢ߩㅘㆊ߇น⢻ߢ㧙㧙޽ࠅ‫ޔߟ߆ޔ‬1600͠⒟ᐲ߹ߢ᣹᷷น⢻ߥἹ‫ޔ‬㧞㧕ṁ㍑ߩෘߐࠍ⚂ 100Ǵm ⒟ᐲߦ଻ᜬߢ
߈‫ޔߟ߆ޔ‬ㅘㆊࠗࡔ࡯ࠫࠍഠൻߐߖࠆߎߣߥߊ X ✢ࠍචಽߦㅘㆊߔࠆ⹜ᢱ࠮࡞‫ޔ‬㧟㧕ᤨ㑆ಽ⸃ X ✢ࠗࡔ࡯ࠫࡦࠣߦᦨㆡߥ X ✢శቇ♽‫ޔ‬㧠㧕ỚᐲಽᏓߥߤࠍ⹏ଔߔࠆߚ߼ߩㅘㆊ↹௝ߩ⸃ᨆᚻᴺߢ޽ࠆ‫ޕ‬ ᧄ⎇ⓥߢߪ‫ޔ‬㧞ߟߩ࠲ࠗࡊߩἹࠍ⹜૞ߒ‫ޔ‬㋕㍑᧚ᢱߩ X ✢ࠗࡔ࡯ࠫࡦࠣߦㆡߒߚἹ
᭴ㅧࠍᬌ⸛ߒߚ‫ޔߪߟ৻ޕ‬ᄢ᳇ਛ޽ࠆ޿ߪ㉄ൻ㔓࿐᳇ਛߢ૶↪ߢ߈ࠆ MoSi2 ࠍ⊒ᾲ૕ߣߒߡ↪޿ߚἹߢ޽ࠅ‫ ߢ߹ࠇߎޔ‬Sn ว㊄‫ޔ‬Al ว㊄ߩߘߩ႐ⷰኤߦ↪޿ࠄࠇߡ߈ߚἹߣၮ
ᧄ⊛ߦߪหߓ᭴ㅧߢ޽ࠆ‫ߩߎޕ‬႐ว‫⹜ޔ‬ᢱ࠮࡞߇⹜ᢱߣᄢ᳇ߩㆤᢿࠍⴕ߁‫ޔߪߟ৻߁߽ޕ‬⌀ⓨ޽ࠆ޿ߪਇᵴᕈ㔓࿐᳇ߢ૶↪ߢ߈ࠆࠣ࡜ࡈࠔࠗ࠻ࠍ⊒ᾲ૕ߣߒߡ↪޿ߚἹߢ޽ࠆ‫ޕ‬ߎߩ႐วߦߪ‫⹜ޔ‬ᢱ࠮࡞ߣᄢ᳇ߣߩㆤ⭁ߩᔅⷐ߇ߥ޿‫⹜ޕ‬૞ߒߚἹߢᬌ⸽ߒߚ⚿ᨐ‫ޔ‬ᓟ⠪ߩἹ᭴ㅧ߇㋕㍑᧚ᢱߩⷰኤߦߪㆡߒߡ޿ࠆߣߩ⚿⺰ߦ⥋ߞߚ‫ޕ‬ᓟ⠪ߩἹࠍ↪޿ߚ⚿ᨐߦߟ޿ߡએਅߦ⺑᣿ߔࠆ‫ޕ‬

Figure 1 ⷰኤⵝ⟎ߩ࠮࠶࠻ࠕ࠶ࡊ
Figure 1 ߪ‫ޔ‬㐿⊒ߒߚߘߩ႐ⷰኤⵝ⟎ߩ࠮࠶࠻ࠕ࠶ࡊߢ޽ࠆ‫⌀ޕ‬ⓨኈེߦߪࡐ࡝ࠗࡒ࠼⤑ࠍ↪޿ߚ X ✢ㅘㆊ↪ߩ⓹߇೨ᓟߩ⸳⟎ߐࠇߡ޿ࠆ‫ޕ‬XZ ࠬ࠹࡯ࠫߦࠃࠅ‫ⷰޔ‬ኤ૏⟎ࠍ⺞ᢛߢ߈ࠆࠃ߁ߦߥߞߡ޿ࠆ‫⌀ޕ‬ⓨኈེߩᓟࠈߦ X ✢ᬌ಴ེࠍ⸳⟎ߒߡ޿ࠆ‫⹜ޕ‬ᢱߣ X✢ᬌ಴ེߩ〒㔌ߪ 0.6-1m ߢ޽ࠆ‫⹜ޕ‬ᢱߣ X ✢ᬌ಴ེߩ〒㔌߇㐳ߊߥࠆߦߟࠇߡ‫ޔ‬X ✢ߩᐓᷤߦࠃࠅ↢ߓࠆዮ᛬ࠦࡦ࠻࡜ࠬ࠻߇ᒝ⺞ߐࠇࠆࠗࡔ࡯ࠫ߇ᓧࠄࠇࠆ‫ޕ‬㊄ዻว㊄ߩ࿕ᶧ⇇㕙ߪߥߛࠄ߆ߥᒻ⁁ࠍߒߡ޿ࠆߚ߼ዮ᛬ࠦࡦ࠻࡜ࠬ࠻ߪᒙ޿‫⹜ޔߡߞ߇ߚߒޕ‬ᢱߣX ✢ᬌ಴ེߩ〒㔌߇ㅘㆊ௝ߩ⾰ߦߪ߶ߣࠎߤᓇ㗀ߒߥ޿ߚ߼‫ޔ‬Ἱ߆ࠄߩユ኿ߦࠃߞߡ X✢ᬌ಴ེߦ࠳ࡔ࡯ࠫࠍਈ߃ߥ޿〒㔌ߣߒߡ 0.6-1m ࠍㆬᛯߒߡ޿ࠆ‫ޕ‬
 Figure 2 ߪ⌀ⓨኈེਛߩἹߩᮨᑼ࿑ߢ޽ࠆ‫⊒࠻ࠗࠔࡈ࡜ࠣޕ‬ᾲ૕ߩ๟ㄝࠍ BN ᧼߇ขࠅ࿐ࠎߛ᭴ㅧߦߥߞߡ޿ࠆ‫⊒࠻ࠗࠔࡈ࡜ࠣޕ‬ᾲ૕ߥࠄ߮ߦ BN ᧼ߩ X ✢ࠍㅘㆊߔࠆㇱಽߦߪⓣ߇㐿ߌࠄࠇߡ߅ࠅ‫ޔ‬X ✢ߪἹߩ⊒ᾲ૕‫ޔ‬ᢿᾲ᧚ࠍㅘㆊߒߥ޿᭴ㅧߦߥߞߡ޿ࠆ‫ޕ‬ߎߩ᭴ㅧߦࠃࠅ‫ޔ‬ㅘㆊ X ✢௝ߩഠൻࠍᛥ೙ߔࠆߎߣ߇ߢ߈ࠆ‫⹜ޕ‬ᢱ࠮࡞ߪ‫ޔ‬㜞⚐ᐲߢ✺ኒߥ Al2O3㧔150Ǵm㧕‫ޔ‬BN(1mm)‫ޔ‬Al2O3 ⵾ࡀࠫ߆ࠄ᭴ᚑߐࠇߡ޿ࠆ‫ޕ‬Al2O3㧔ᾲ⤘ᒛ₸ߪᱜ㧕‫ޔ‬BN㧔ᾲ⤘ᒛ₸ߪ⽶㧕ߩᾲ⤘ᒛᏅߦࠃࠅ‫ޔ‬ടᾲ⁁ᘒߢ⹜ᢱෘߐ߇ᄌൻߒߥ޿᭴ㅧߦߥߞߡ޿ࠆ‫ޔߚ߹ޕ‬ṁ㍑ߩ⴫㕙ᒛജߪᄢ߈޿ߚ߼‫ޔ‬100Ǵm ෘߩⲢᶧࠍ଻ᜬߒߚ႐㧙㧙ว‫Ⲣޔ‬ᶧ⴫㕙ߦߪ⴫㕙ᒛജߦࠃࠅ 0.01MPa ߩ࿶ജ߇↢ߓࠆ‫ߩߎޕ‬࿶ജߦࠃࠅ Al2O3㧔150Ǵm㧕߇⪺ߒߊᄌᒻߒߥ޿᭴ㅧߦߥߞߡ޿ࠆ‫ޕ‬߹ߚ‫⹜ޔ‬૞ߒߚἹߢߪ‫⊒ޔ‬ᾲ૕ߦࠣ࡜ࡈࠔࠗ࠻ࠍ↪޿ߡ޿ࠆߚ߼‫ޔ‬Ἱౝߩ㉄⚛ࡐ࠹ࡦࠪࡖ࡞ߪ 2C+O2=2CO ߩᐔⴧ㑐ଥߦࠃࠅ᳿߹ࠅ‫ޔ‬ታ㛎᧦ઙߢߪṁ㍑ߩⲢᶧ⴫㕙߇㉄ൻߔࠆߎߣߪߥߊಝ࿕ⷰኤߪน⢻ߢ޽ߞߚ‫੹ޔߒ߆ߒޕ‬ᓟ‫ࠍ࡞ࡖࠪࡦ࠹ࡐ⚛㉄ޔ‬೙ᓮߒߚ᧦ઙߢⷰኤࠍⴕ߁ᔅⷐ߇޽ࠆ႐วߦߪᡷ⦟߇ᔅⷐߢ޽ࠆ‫ޕ‬

Figure 2 ⷰኤἹߩ᭴ㅧ
Table 1 Fe-Si-Al ว㊄ߩⷰኤ᧦ઙ
Fe-Si-Al
Composition

Fe-10at%Si-0.5at%Al

Partition coefficient

0.74

Dimension

7mm x 7mm x 100µm

X-ray energy

16 keV – 25 keV

Detector

X-ray direct-sensing pickup tube SATICON [16]Pixel size

4µm x 4µm

Cell

Al2O3 (150µm) / Fe-Si-Al / Al2O3 (150µm)

Atmosphere

Vacuum (10-1 torr)㧟㧚ⷰኤ⚿ᨐ
3.1 Fe-Si-Al ว㊄ߩߘߩ႐ⷰኤ
 Fe-10at%Si-0.5at%Al ว㊄ߪ‫ޔ‬Fe ߣ Si‫ޔ‬Al ߩ X ✢ๆ෼ଥᢙ߇ᄢ߈ߊ⇣ߥࠆߚ߼‫ޔ‬Si޽ࠆ޿ߪ Al Ớᐲߦࠃࠅ⹜ᢱߩ X ✢ๆ෼߇ᄢ߈ߊᄌൻߔࠆ‫ޕ‬࿕⋧ߣᶧ⋧ߢߪ Si‫ޔ‬Al ߩಽ㈩߇㆑߁ߚ߼‫ޔ‬࿕ᶧ⇇㕙ߢࠦࡦ࠻࡜ࠬ࠻߇ᄢ߈ߊ‫ޔ‬ᶧ⋧ਛߩ Si‫ޔ‬Al Ớᐲᄌൻ߽⸘᷹ߢ
߈ࠆน⢻ᕈߩ޽ࠆว㊄♽ߢ޽ࠆ‫ⷰޕ‬ኤ᧦ઙࠍ Table㧝ߦ␜ߔ‫ⷰޕ‬ኤߪ‫ޔ‬SPring-8 ߩ BL-20B2
ࡆ࡯ࡓ࡜ࠗࡦߢⴕߞߚ‫ޕ‬X ✢ߩᬌ಴ߦߪࠨ࠴ࠦࡦߣ๭߫ࠇࠆ⋥ធᄌ឵ဳᬌ಴ེࠍ↪޿ߡ߅ࠅ‫ⷰޔ‬ኤ㗔ၞߥࠄ߮ߦࡇࠢ࠮࡞ࠨࠗ࠭ߪ‫ ࠇߙࠇߘޔ‬4mm㨤4mm‫ޔ‬4Ǵmx4Ǵm ߢ޽ࠆ‫ޕ‬㧙㧙ታ⾰⊛ߥⓨ㑆ಽ⸃⢻ߪ 5-10Ǵm ߢ޽ࠆ‫࠻ࠗ࡜࠼ࡦ࠺ޔߡߞ߇ߚߒޕ‬ᚑ㐳ߔࠆಝ࿕ߩⷰኤߦㆡߒߚ᧦ઙߦߥߞߡ޿ࠆ‫ᤨޔߚ߹ޕ‬㑆ಽ⸃⢻ߪ 0.5-1fps ߢ޽ࠆ‫ޕ‬ Figure 3 ߪ‫ޔ‬Fe-10at%Si-0.5at%Al ว㊄ߩಝ࿕ㆊ⒟ߩⷰኤ଀ߢ޽ࠆ‫ⷰޕ‬ኤ㗔ၞߩਅㇱߢǬ-Fe ߇ᩭ↢ᚑߒ㧔Fig.3(a)㧕‫߇࠻ࠗ࡜࠼ࡦ࠺ޔ‬ᒻᚑߐࠇࠆ᭽ሶ߇᣿⍎ߦⷰኤߐࠇߚ‫ޕ‬ߐࠄߦಝ࿕߇ㅴⴕߔࠆߣ࠺ࡦ࠼࡜ࠗ࠻ห჻߇߱ߟ߆ࠅ‫☻ߩࡓ࡯ࠕ࠻ࠗ࡜࠼ࡦ࠺ޔ‬ᄢൻ‫ޔ‬⚿᥏☸⇇ߩᒻᚑ߽ⷰኤߢ߈ߚ㧔Fig.3(b)-(d)㧕
‫ޕ‬Figure 3(d)ߩ਄ㇱߩ⊕޿ㇱಽߪಝ࿕ᧃᦼߦಝ࿕෼❗ߦࠃࠅಝ࿕ㆃࠇㇱߩᶧ⋧߇ઁߩ㗔ၞߦᵹേߔࠆߎߣߦࠃࠅ↢ߓߡ޿ࠆ‫ޕ‬ෘߐ
100Ǵm ߩ⹜ᢱਛߢ߽ᵹേ߇ኈᤃߦ↢ߓߡ޿ࠆߎߣ߇ಽ߆ߞߚ‫⎇ᧄޕ‬ⓥߢ㐿⊒ߒߚἹ࡮⹜ᢱ࠮࡞ߦࠃࠅ Fe ♽ว㊄ߢ߽ಝ࿕ㆊ⒟߇ⷰኤߢ߈ࠆߎߣ߇᣿ࠄ߆ߦߥߞߚ‫ޕ‬

Figure 3 Fe-10at%Si-0.5at%Al ว㊄ߩಝ࿕ㆊ⒟ߩ X ✢ࠗࡔ࡯ࠫ ಄ළㅦᐲ㧦25K/min(a) 20s, (b) 30s, (c) 40s and (d) 300s.
Figure 3 ߦ␜ߒߚࠃ߁ߥಝ࿕ㆊ⒟ߩㅘㆊ X ✢ᒝᐲߪᰴᑼߢ⴫ߐࠇࠆ‫ޕ‬I s / I 0 exp P cell t cell exp ª¬ P s x, y t s x, y º¼ .
(1)
I0 ߪ౉኿ X ✢ᒝᐲߢ޽ࠅ‫ޔ‬µ ߥࠄ߮ߦ t ߪߘࠇߙࠇ✢ๆ෼ଥᢙߣෘߐߢ޽ࠆ‫ޕ‬ᷝ߃ሼߩ㨟‫ޔ‬cell ߪߘࠇߙࠇ⹜ᢱ‫࡞࠮ޔ‬㧔Al2O3㧕ߢ޽ࠆ‫ޕ‬ ஍ᨆߩ⹏ଔߩߚ߼ߩ⸃ᨆᚻᴺࠍ⺑᣿ߔࠆ‫ޕ‬ಝ࿕㐿ᆎ೨ߩᶧ⋧⁁ᘒߩㅘㆊ X ✢ᒝᐲߪ‫ޔ‬I L / I 0 exp P cell t cell exp ª¬ P L t s x, y º¼ .
(2)ߣߥࠆ‫ޕ‬ᑼ(1)ߣᑼ(2)ࠃࠅ‫ޔ‬㧙㧙exp ª ª¬P s x, y  P L º¼ t s x, y º(3)¬¼߇ᓧࠄࠇࠆ‫ߩߎޕ‬ᠲ૞ߦࠃࠅ⹜ᢱ࠮࡞ߩๆ෼ߩᓇ㗀ࠍ㒰෰ߒ‫ޔ‬IL/IS ߪᶧ⋧ߣ࿕⋧ߩ✢ๆ෼ଥᢙߩᏅߣ⹜ᢱෘߐߩߺߦଐሽߔࠆ‫↹ߥ߁ࠃߩߎޕ‬௝ಣℂࠍⴕߞߚࠗࡔ࡯ࠫࠍ Fig.4
ߦ␜ߔ‫ޕ‬
I L / IS

Figure 4. ᑼ(3)ߦࠃࠅⷙᩰൻߐࠇߚ X ✢௝ Ꮐ⍫ශవ┵߇ Point A‫ޔ‬ฝ⍫ශߩవ┵߇ PointB ߢ޽ࠅ‫ޔ‬Ớᐲᄌൻࠍ⸃ᨆߒߚ૏⟎ࠍ␜ߔ

Figure 5. ᑼ(3)ߦࠃࠅⷙᩰൻߐࠇߚ X ✢ᒝᐲ ⍫ශߪỚᐲᄌൻࠍ⸃ᨆߒߚ૏⟎ࠍ␜ߔ ࠺ࡦ࠼࡜ࠗ࠻ࠕ࡯ࡓ㑆‫⇇☸ޔ‬㑆ߢ↹௝ᒝᐲ߇ᄌൻߒߡ޿ࠆ᭽ሶ߇ⷰኤߐࠇߚ‫ޕ‬Fe-Siว㊄ߩ⹜ᢱߩ✢ๆ෼ଥᢙߪᰴᑼߢ⴫ߐࠇࠆ‫ޕ‬­°§ P ·½°­°§ P ·½°ª§ P ·§ P·§ P· ºP s U ®¨1 w Si  ¨w Si ¾ U ®¨
 «¨
¨(4)
» w Si ¾ .
© U ¹̧ Si°̄© U ¹̧ Fe°̄© U ¹̧ Fe «¬ © U ¹̧ Si © U ¹̧ Fe »¼°¿¿°ߎߎߢ‫ޔ‬wSi ߪ Si ߩ⾰㊂ಽ₸ߢ޽ࠅ‫ޔ‬Ớᐲ߇ૐ޿ Al ߪήⷞߒߡ޿ࠆ㧔Al ߩ✢ๆ෼ଥᢙߪ Si ߣ߶߷หߓߢ޽ࠅ‫ޔ‬ૐỚᐲߩ Al ࠍήⷞߒߡ߽ᄢ߈ߥ⺋Ꮕࠍ↢ߓߥ޿㧕‫৻ޕ‬ᣇ‫ޔ‬ಝ࿕೨ߩᶧ⋧ߩߺߩ✢ๆ෼ଥᢙߪ‫ޔ‬Si Ớᐲ߇ဋ৻ߢ޽ࠅ‫ޔ‬­°§ P ·ª§ P ·§ P · º 0 ½°
P L U L ®¨
 «¨
¨(5)
» w Si ¾ .
°̄© U ¹̧ Fe «¬© U ¹̧ Si © U ¹̧ Fe »¼°¿ߣߥࠆ‫ޔߢߎߎޕ‬Si Ớᐲߦࠃࠆᶧ⋧ኒᐲߩᄌൻ߇ήⷞߢ߈ࠆߣ઒ቯߔࠆߣ‫ޔ‬ಝ࿕ㆊ⒟ߩ⹜ᢱߣಝ࿕೨ߩ✢ๆ෼ଥᢙߩᏅߪ‫ޔ‬㧙㧙

ª§ P ·§ P· º0¨P s  P L | UL « ¨(6)» w Si  w Si .
UU©
©
¹̧
¹̧«¬
SiFe »¼ߣߥࠆ‫ޕ‬ಝ࿕ㆊ⒟ߢ⹜ᢱෘߐ߇ᄌൻߒߡ޿ߥ޿ߣߔࠆߣ‫ޔ‬ᑼ(3)ߦࠃࠅ⸃ᨆߐࠇߚ Fig.4
ߩ↹௝ߦ߅ߌࠆノᐲߪ‫ޔ‬Si Ớᐲߦኻᔕߒߡ޿ࠆ‫⸃ޔߡߞ߇ߚߒޕ‬ᨆ↹௝ߩノᐲᄌൻࠍ᷹
ቯߔࠆߎߣߦࠃࠅ‫ޔ‬஍ᨆᒻᚑࠍಝ࿕ㅴⴕߦ઻޿ߥ߇ࠄⷰኤߢ߈ࠆߎߣߦߥࠆ‫߁ࠃߩߎޕ‬ߥ᷹ቯߪ‫ޔ‬ᓥ᧪ߩಝ࿕⚵❱ⷰኤߢߪߢ߈ߥ޿‫ޕ‬
 Fig.5 ߪ‫ޔ‬Fig.4 ߩ⍫ශߩㇱಽ㧔㧞ᰴ࠺ࡦ࠼࡜ࠗ࠻ࠕ࡯ࡓ㑆‫⇇☸ޔ‬㑆㧕ߩノᐲᄌൻߢ޽ࠆ‫ޕ‬㧞ᰴ࠺ࡦ࠼࡜ࠗ࠻ࠕ࡯ࡓ㑆ߢ޽ࠆ Point A ߩ஍ᨆߪ‫ޔ‬20s ઃㄭ߆ࠄ㐿ᆎߒ‫ޔ‬Si Ớᐲߪන⺞ߦჇടߒ㧔ノᐲߪන⺞ߦᷫዋ㧕‫ޔ‬40s ߢಝ࿕߇⚳ੌߒߚ‫ޕ‬ಝ࿕⚳ੌᓟߪノᐲ߇㜞ߊߥࠅ‫ޔ‬๟ㄝߩ࿕⋧ߣ඙೎ߢ߈ߥ޿⁁ᘒߦߥߞߚ‫ޔࠅ߹ߟޕ‬㧞ᰴࠕ࡯ࡓ㑆ߩ஍ᨆߪ‫ޔ‬ಝ࿕⚳ੌᓟߩ࿕⋧ౝ᜛ᢔߦࠃࠅ߶߷ᶖṌߔࠆߎߣ߇᣿ࠄ߆ߦߥߞߚ‫৻ޕ‬ᣇ‫⇇☸ޔ‬㑆ߩ஍ᨆߢ޽ࠆ Point B ߦᵈ⋡ߔࠆߣ‫߇࠻ࠗ࡜࠼ࡦ࠺ޔ‬೔㆐ߔࠆ೨ߢ޽ࠆ 40s ߆ࠄ Si ߩỚൻ߇㐿ᆎߒߡ޿ࠆ‫ߪࠇߎޕ‬㧞ᰴ࠺ࡦ࠼࡜ࠗ࠻ࠕ࡯ࡓ㑆ߢỚൻߒߚ Si ߇࠺ࡦ࠼࡜ࠗ࠻ࠕ࡯ࡓ㑆ߛߌߢߥߊ࠺ࡦ࠼࡜ࠗ࠻೨ᣇߦャㅍߐࠇߡ޿ࠆߎߣࠍ␜ߒߡ޿ࠆ‫࠻ࠗ࡜࠼ࡦ࠺ޔߦࠄߐޕ‬߇೔㆐ߒߚᓟ߽஍ᨆ߇ᶖṌߔࠆߎߣߥߊ‫ޔ‬஍ᨆ߇ᱷߞߚ‫ࡓ࡯ࠕ࠻ࠗ࡜࠼ࡦ࠺ޕ‬㑆ߦᲧߴߡ஍ᨆߩ⒟ᐲ߽㜞ߊߥߞߡ޿ߚ‫੹ޕ‬ᓟ‫࠻ࠗ࡜࠼ࡦ࠺ߥ߁ࠃߩߎޔ‬ᚑ㐳ᤨߩ஍ᨆᄌൻࠍቯ㊂⊛ߦ⹏ଔߒߚ࠺࡯࠲ࠍ↪޿ࠇ߫‫ޔ‬஍ᨆࡕ࠺࡞ߩ᭴▽‫ޔ‬ታ㛎⚿ᨐߣߩᲧセࠍㅢߒߚࡕ࠺࡞ߩᅷᒰᕈ⹏ଔߥߤ߇น⢻ߦߥࠅ‫ޔ‬ା㗬ᕈߩ㜞޿ታ↪⊛ߥࡕ࠺࡞߇᭴▽ߢ߈ࠆߣᦼᓙߐࠇࠆ‫ޕ‬

Figure 6 ⚐㋕㧔㔚⸃㋕㧕ߩ࿕ᶧ⇇㕙 ฝਅ߇࿕⋧‫ޔ‬Ꮐ਄߇ᶧ⋧3.2 ⚐㋕ߩ࿕ᶧ⇇㕙ߩⷰኤ Fe-C ว㊄ߩಝ࿕⃻⽎ࠍⷰኤߔࠆ႐ว‫ޔ‬C ߩ X ✢ๆ෼ଥᢙߪ Fe ߩๆ෼ᒻᚑߦᲧߴߡ⪺ߒߊዊߐߊ‫ޔ‬C ߩๆ෼ߪήⷞߢ߈ࠆ‫ޔߚ߹ޕ‬Fe ߣ Mn ߩๆ෼ଥᢙߩᏅߪዊߐ޿‫ߚߩߘޕ‬߼‫ޔ‬Fe-C ว㊄ߩಝ࿕ⷰኤࠍⴕ߁ߚ߼ߦߪ‫ޔ‬ṁ⾰Ớᐲߦࠃࠆ X ✢ๆ෼ߩᏅߢߪߥߊ‫ޔ‬࿕⋧ߣᶧ⋧ߩኒᐲᏅߦࠃࠅ↢ߓࠆ X ✢ๆ෼ߩᏅࠍᬌ಴ߔࠆᔅⷐ߇޽ࠆ‫ޕ‬Fe ߩಝ࿕෼❗㊂ߪ㧠㧑ߢ޽ࠅ‫ޔ‬Fe-C ว㊄ߩⷰኤߢߪ㧠㧑ߩኒᐲᏅࠍ᦭ᗧߥノᐲߩᏅߣߒߡᬌ಴ߢ߈ࠆ࠮࠶࠻ࠕ࠶ࡊ߇ᔅⷐߣߥࠆ‫৻ޕ‬ᣇ‫ޔ‬ṁ⾰ࠍ฽߹ߥ޿⚐㋕ߩ࿕ᶧ⇇㕙ߩⷰኤ߇น⢻ߦߥࠇ߫‫ޔ‬ᐢ᳢ߥ㍑⒳ߢಝ࿕߇ⷰኤߢ߈ࠆߎߣߦߥࠆ‫⚐ޔߢߎߘޕ‬㋕ߩ࿕ᶧ⇇㕙ߩⷰኤࠍ⹜ߺߚ‫ޕ‬㧙㧙

Figure 6 ߪ‫⚐ޔ‬㋕㧔㔚⸃㋕㧕ߩ࿕ᶧ⇇㕙ࠍ 19keV ߩ X ✢ߢⷰኤߒߚ⚿ᨐߢ޽ࠆ‫⹜ޕ‬ᢱෘߐ‫ޔ‬X ✢ࠛࡀ࡞ࠡ࡯ߩ⺞ᢛߦࠃࠅ‫ޔ‬࿕ᶧ⇇㕙ࠍⷰኤߔࠆߎߣ߇น⢻ߦߥߞߚ‫ޕ‬

Figure 7 ࿕ᶧ⇇㕙ઃㄭߩ X ✢ㅘㆊ௝ߩノᐲᄌൻ㧔Figure 6 ߩ⊕✢ㇱಽ㧕 Figure 7 ߪ‫ޔ‬Fig.6 ߩ⊕✢ㇱߩノᐲᄌൻߢ޽ࠆ‫ޕ‬࿕ᶧ⇇㕙ઃㄭߢߪ 10%એ਄ߩノᐲߩᏅ߇޽ࠆ‫⇇ޔߚ߹ޕ‬㕙ߩࡑࠗ࠽ࠬ஥ߢノᐲ߇Ⴧട‫ࠬ࡜ࡊޔ‬஥ߢノᐲ߇ᷫዋߔࠆ௑ะ߇⷗
ࠄࠇࠆ߇‫ߪࠇߎޔ‬ᐔⴕߥ౉኿ X ✢߇ᐓᷤߒߡ↢ߓࠆዮ᛬ࠦࡦ࠻࡜ࠬ࠻ߢ޽ࠅ‫ޔ‬ዮ᛬ࠦࡦ࠻࡜ࠬ࠻߽⇇㕙ߩⷰኤߦ᦭ലߢ޽ࠆߎߣ߇᣿ࠄ߆ߦߥߞߚ‫ޕ‬ ߎߩ⚿ᨐߪ࿕ᶧߩኒᐲᏅ߇㧠㧑⒟ᐲ޽ࠇ߫ᧄ⎇ⓥߢ㐿⊒ߒߚⷰኤ♽ࠍ↪޿ߡ⇇㕙ߩᬌ಴߇น⢻ߢ޽ࠅ‫ޔ‬Fe-C ♽ߥߤᐢ᳢ߥว㊄♽ߢಝ࿕ⷰኤ߇น⢻ߢ޽ࠆߎߣࠍ␜ໂߒߡ޿ࠆ‫ޕ‬㧠㧚߹ߣ߼ ᧄ⎇ⓥߢߪ‫ޔ‬᡼኿శࠍ೑↪ߒߚ Fe ♽ว㊄ಝ࿕ߩߘߩ႐ⷰኤᛛⴚߩ㐿⊒ߣߘߩᔕ↪ࠍ⋡ᜰߒߡ⎇ⓥࠍⴕߞߚ‫ޕ‬㧝㧕㋕㍑᧚ᢱߩⲢᶧࠍ଻ᜬߒ‫ޔ‬ㅘㆊ : ✢ࠗࡔ࡯ࠫࠍഠൻߐߖߥ޿Ἱ‫⹜ޔ‬ᢱࠍ㐿⊒ߔࠆߎߣ߇ߢ߈ߚ‫੹ޕ‬ᓟ‫⹜ޔ‬ᢱෘߐ‫ޔ‬ಝ࿕ᣇะߩ೙ᓮ߇น⢻ߦߥࠇ߫‫ޔ‬ᄙ᭽ߥⷰኤታ㛎ߦᔕ↪ߢ߈ࠆߣ⠨߃ࠄࠇࠆ‫ޕ‬㧞㧕࿕⋧ߣᶧ⋧ߩๆ෼ࠦࡦ࠻࡜ࠬ࠻߇Ყセ⊛ᄢ߈޿ (G5K#N ว㊄ߩߘߩ႐ⷰኤࠍⴕ޿‫(ޔ‬G ♽ว㊄ߦ߅޿ߡೋ߼ߡ࠺ࡦ࠼࡜ࠗ࠻ᚑ㐳ࠍ᣿⍎ߦⷰኤߔࠆߎߣ߇ߢ߈ߚ‫ޕ‬
㧟㧕(G5K#N ว㊄ߩ : ✢ㅘㆊ௝ࠍ⸃ᨆߔࠆߎߣߦࠃࠅ‫ޔ‬ᶧ⋧ਛߩ 5K Ớᐲࠍ⹏ଔߢ߈ࠆߎߣࠍ᣿ࠄ߆ߦߒߚ‫ޕ‬: ✢ᬌ಴ེߩቯ㊂ᕈߥߤࠍᡷༀߔࠇ߫‫ޔ‬5K Ớᐲߩ㧞ᰴరቯ㊂᷹ቯ߇น⢻ߦߥࠆߣ⠨߃ࠄࠇࠆ‫ࡓ࡯ࠕ࠻ࠗ࡜࠼ࡦ࠺ޔߚ߹ޕ‬㑆‫⇇☸ޔ‬㑆ߩ஍ᨆᒻᚑㆊ⒟ࠍ⹏ଔߒ‫ޔ‬㧞ᰴࠕ࡯ࡓ㑆ߩ஍ᨆߪಝ࿕ቢੌᓟ‫ޔ‬࿕⋧ౝ᜛ᢔߢᶖṌߔࠆ᭽ሶࠍ᣿ࠄ߆ߦߒߚ‫⇇☸ޕ‬㑆ߩ஍ᨆߪ‫ߩ࠻ࠗ࡜࠼ࡦ࠺ޔ‬೔㆐એ೨ߦ㐿ᆎߐࠇ‫ޔ‬ಝ࿕ᓟ߽ᱷࠆ᭽ሶ߇ⷰኤߐࠇߚ‫੹ޕ‬ᓟ‫ޔ‬ታ⸽⊛ߥ஍ᨆࡕ࠺࡞ߩ᭴▽ߦነਈߢ߈ࠆߣ⠨߃ࠄࠇࠆ‫ޕ‬㧠㧕⚐㋕ߩ࿕ᶧ⇇㕙ߩⷰኤ߇㐿⊒ߒߚᛛⴚߢน⢻ߢ޽ࠆߎߣࠍ᣿ࠄ߆ߦߒߚ‫⚿ߩߎޕ‬ᨐߦࠃࠅ‫੹ޔ‬ᓟ‫ޔ‬ᐢ᳢ߥ㋕㍑᧚ᢱߩಝ࿕ⷰኤ߇ᦼᓙߐࠇࠆ‫ޕ‬㧙㧙⻢ㄉᧄ⎇ⓥߪ‫ޔ‬㧶㧲㧱㧞㧝਎♿⽷࿅ߩᛛⴚ⎇ⓥഥᚑ㧔2007 ᐕᐲ㧕ߦࠃࠅታᣉߐࠇߚ߽ߩߢ
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