ISSN 1345-2754 8 15 2003 8 29 . . . Tc-99 14 ... 3 RIBF .. 9 ... .................. 16 1 4 2 . . . ....................... 19 3 International Symposium on Bio-Trace Elements 4 1 5 6 40 7 8 4
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2003 47 ... 2001 Asia Pacific Symposium on Radiochemistry ) (APSORC 2001 ( 18 293 APSORC 2005 10 Journal of Nuclear and Radiochemical ( ) Sciences (KEK) 2 APSORC 2001 12 Advances in Heavy Element Research (ASR-2000) KEK 1999 10 460 ) 51 ( ) 5 1 ( ) 152 1 (Reviews, Accounts) 3 KEK 160 ) ( ) ) ) 4 ( ( 34 ) oTc oTc Tc s Tc Tc 21 2 39Tc 99Tc 99Tc
140TBq 99Tc 99Tc TcO 4
tonne 99Tc (TcO 4 -) [1] TcO4¯ kg 1 (ICP-MS) [4–10] Fig.l 1000 Tc [4,8] Eichrom TEVA TBP, TOA, MEK, Cyclohexanone, CCl 4 CCl4 ICP-MS 99 ICP-MS Ru Tc Ru-99 Ru Tc- Inductively Coupled Plasma Mass Spectrometry ( 20 Tc) Separation method for 99 Tc in soil. Fig. 1 and their recovery in each eluate. [6] 0.05M NaCl 0.05M NaOH 95mTc 106Ru 100mL 0.5M NaCl TEVA HNO3 50mL (25mL×  2) Tc HNO3 15mL (5mL×  3) Fig.2 Tc Ru – 1M HNO3 90% Tc 0.1M HNO3 Ru 12M 1 M Tc 99 Ru Tc TEVA Ru 9911TC 5mL 100 Tc Ru 5mL Ru 12M HNO3 1 2% [7] 
 
 99Tc 9Tc 99Tc Fig.3 34mBq/kg 5.9mBq/kg ） ( mBq/kg 9Tc 8M HNO3 TEVA ICP-MS 70 60 2%HNO3 5mL <0.1mL ICP-MS Tc Fe Al Ge ( 61d) (1.4× 10) 3.3× 10 -4 99Tc [11] 16.3 soil. Tc 99Tc 99Tc 99Tc Tc 4 Tc Tc Tc 2mm ) dried soil [AD] ) Tc Tc [12] (Air- Fig.6 Tc Tc Tc [13] 5 Tc TcO4 1 TcO 4 (Sterile soil [S] Tc Tc Table 1 Fragaria vesca) collected in the 30-km zone around Chernobyl.
[14, 15] TcO4 Tc Tc 97Tc TcO4 99Tc 99Tc 30km 1995 IAEA Technical Report Series 364 Tc [2] Table 1 1994 Re Re TcO 4 Tc D-3 Wet Forest 99Tc Tc 6 (Re) 99Tc 12-2600 Tc 99Tc [1]   D.G.Brookins, Eh-pH  Diagramsfor  Geochem- istry . (Springer-Verlag, Berlin, 1988), pp. 97- 99. [2]   IAEA: Handbook of parameter Values for the Prediction of Radionuclide Transfer in Temperate Environments. (IAEA, Vienna, 1994), Tech. Rep. Ser. No. 364. [3]   IAEA: Generic Models and Parameters for Assessing the Environmental Transfer of Radionuclides from Routine Releases. (IAEA, Vienna, 1982), Safety Ser. No. 57, p. 61. [4]  K. Tagami and S. Uchida, Radiochim. Acta 63, 69 (1993). [5] K. Tagami and S. Uchida, Appl. Radiat. Isot., 47, 1057 (1996). S. Uchida and K. Tagami, J. Radioanal. Nucl. [6] Chem. 221, 35 (1997). [7] S. Uchida and K. Tagami, Radioact. Radiochem. 10, 23 (1999). [8] K. Tagami and S. Uchida, Radioact. Radiochem. 10, 30 (1999). [9] T.Sekine, M. Konishi, H. Kudo, K. Tagami, and S. Uchida, J. Radioanal. Nucl. Chem. 239, 483 (1999). [10] K. Tagami and S. Uchida, J. Radioanal. Nucl. Chem., 239, 643 (1999). [11] K. Tagami and S. Uchida, J.Nucl. Radiochim. Sci. 3, 1-5 (2002). [12] K. Tagami and S. Uchida, Chemosphere 33, 217 (1996). [13] K. Tagami and S. Uchida, Toxicol. Environ. Chem. 56, 235 (1996). [14] L.R. Van Loon, G.M. Desmet, and A. Cremers, in Speciation of Fission and Activa- tion Products in the Environment , R.A. Bulman and J.R. Cooper Eds. (Elsevier Appl. Sci. Pub., London, 1986), pp. 352-360. [15] G.C. Krijger, A.V. Harms, R. Leen, T.G. Verburg, and B. Wolterbeek, Environ. Exp. Bot. 42, 69 (1999). [16] S. Uchida, K. Tagami, W. Rühm, M. Steiner, and E. Wirth, Appled Radiat. Isotop. 53, 69 (2000). 2003 4 1991 RI 3 1 1991 E3 1) 14 N RI 2  3 RI RI ( 9 2μ m 30 1 18
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2 3 RIBF RI    1          10 10    10 13 ²Mg  67Cu 1 RIBF RIBF 1 RI 1 1.2GBq    11GBq RI RIBF 2007 RIBF RI (RIPS) RI 3 RI RI l 1000 1) Ambe S., Chen S.Y., Ohkubo Y., Kobayashi Y., Iwamoto M., Yanokura M., and Ambe F., Chem. Lett., 1991, 149-152 (1991). 2) Enomoto S. (ed), Trends in bio-trace element research , RIKEN Rev., 35, 1-129 (2001). 3) , Biomed. Res. Trace Elements, 12, 71- 84 (2001). 4)Sakurai H., Proceedings of International Symposium on Bio-Trace Elements 2002, Enomoto S. and Seko Y. (Eds.), 113-118 RIKEN, Japan (2003). 5) Schäel M. (Ed.), The Chemistry of Superheavy RI Elements, Kluwer Academic Publishers, Dordrecht (2003). 6) Kratz J. V., Heavy Elements and Related New Phenomena, Greiner W. and Gupta R. K. (Eds.), Vol. 1, p.129, World Scientific, Singa- pore (1999). 7) , RADIOISOTOPES , 44, 36- , 42 (1995). 8) Kubo T., Nucl. Instrum. Meth. B, 204, 97-113 (2003). 9) , 205, 884- 886 (2003). 68Ga 45Ca
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2 25 -NMR RIPS KEK-JAERI RI siderite fine field Hyper- 2. 2002 12 17 19 3 3. International Symposium on Bio-Trace Elements (RIKEN)
Joint Sympo- sium (B)
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24 30 3 RIKEN YIES 45 1 RIKEN RI BITREL2002 Thiele Cu 4. 1 scientific power 11 2001 2002 5 6 Ca oscillation wave 26 24 11 Haraguchi (Nagoya Univ.), Lobinski (Poland), Chai (Chia), Szpunar (France), Gono (Kyushu Univ.), Matsumoto (Waseda Univ.), Sarkar (Canada), Burk (USA), Suzuki (Chiba Univ.), Styblo (USA), Thiele (USA), Tanihata (RIKEN), Takeda (Shizuoka Univ.), Mikoshiba (RIKEN), Sakoda (Osaka Univ.), Brown (UK), Naganuma (Tohoku Univ.), Maret (USA), Sakurai (Kyoto Pharm. Univ.), McNeil (Canada) ( ) 12 150 Conf JAERI- 40 6. 12
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40 5. International Symposium on Transfer of Radionuclides in Biosphere - Predic- 18 2002 12 19 tion and Assessment - 2 3 133 54 24 3 AMS 2 15 
 
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Keynote Presentation J. of Environmental Radioactivity    Chief Editor S. C. Sheppard "An Index of Radio- ecology, What Has Been Important?" 46 11 RI 18 RI 110 GSI
Darmstadtium 111 113 8. 4 4 4 3 17 RI EDTA TPEN RI Kuzmann （） 12 18 19 14 Crossover Research Promotion Council International Symposium on Transfer of Radionuclides in Biosphere Prediction and Assessment   15 12 27 174 4 http://wwsoc. nii.ac.jp/aesj/hobkan/ 7000 15 14 15 ICRP 15 14 14 9 25 25 14 9 26 11 14 ll 21 22