@techreport{oai:jaxa.repo.nii.ac.jp:00041865,
 author = {伊丹, 俊夫 and 水野, 章敏 and 青木, 拓克 and 兼子, 稔 and 深澤, 智晴 and 丹治, 彰 and 荒井, 義人 and 後藤, 一将 and 山浦, 由起子 and 立岩, 夏美 and Itami, Toshio and Mizuno, Akitoshi and Aoki, Hirokatsu and Kaneko, Minoru and Fukazawa, Tomoharu and Tanji, Akira and Arai, Yoshihito and Goto, Kazumasa and Yamaura, Yukiko and Tateiwa, Natsumi},
 month = {Mar},
 note = {微小重力下における液体リチウムの自己拡散測定実験を試料処理と試料容器の構成に重点をおいてTR-1A-6ロケットを使って実施した。リチウム試料は酸素、窒素および水分との反応を防止するため完全な不活性雰囲気中で調製した。異なる同位体の存在比が異なる反応性リチウム試料をそれぞれBN(窒化ホウ素)容器に入れ、BN容器は各ステンレス鋼アンプルにセットした。TR-1Aロケットの多目的炉中の4炉を使って、長毛管法による実験を593K、643Kおよび673Kの異なる温度条件で実施し、また拡散対実験を593Kの温度で実施した。実験の間を通して、マランゴニ対流の発生を防ぐためタングステンばねを用いて液体試料に微弱な圧力を印加した。微小重力実験を温度安定性が±3Kで、保持時間が170〜224sで行うことに成功した。拡散係数は濃度分布から計算した。液体Li-7中のLi-6および液体Li-6中のLi-7の拡散係数を検討した結果、質量の軽いLi-6の方が質量の重いLi-7よりも最大で1.3倍早く拡散することが分かった。液体リチウムの自己拡散の理論解析を充填率0.472の液体の剛体球模型に基づいて行った。計算結果は実験値とかなり一致することが分かった。, The microgravity experiment for measurement of self-diffusion of liquid lithium was carried out by means of TR-1A-6 rocket placing emphasis on the sample treatment and the construction of sample containers. The sample of lithium was prepared under a completely inert atmosphere to prevent the reaction with oxygen, nitrogen and water. The reactive lithium samples with different isotopic abundances were contained respectively in BN containers and BN container was placed in each stainless steel ampoule. The experiments using long capillary method were performed under microgravity at three different temperatures of 593, 643 and 673 K as well as the experiment for diffusion couple was done at 593 K with four independent furnaces in the multi-purpose furnace of TR-1A rocket. Throughout the course of the experiments, a slight pressure was applied to the liquid samples by means of tungsten spring to avoid the occurrence of Marangoni convection. The microgravity experiments were successfully performed with the temperature stability of +/-3 K and the holding time of 170 to 224 seconds. The diffusion coefficient was calculated from the concentration profiles. Investigation on diffusion coefficient of Li-6 in liquid Li-7 and Li-7 in liquid Li-6 revealed that lighter Li-6 diffuses faster than the heavier Li-7 with ratio of 1.3 at the largest. Theoretical analysis of self-diffusion of liquid lithium was carried out based on the hard sphere model of liquids with the packing fraction of 0.472. The calculations were found to give a fair agreement with experiment., 資料番号: AA0029039006, レポート番号: NASDA-TMR-000013E},
 title = {The microgravity diffusion experiment for highly reactive liquid metals},
 year = {2001}
}