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JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2023

Kokubun, Yuji; Hosomi, Kenji; Nagaoka, Mika; Seya, Natsumi; Inoue, Kazumi; Koike, Yuko; Uchiyama, Rei; Sasaki, Kazuki; Maehara, Yushi; Matsuo, Kazuki; et al.

JAEA-Review 2024-054, 168 Pages, 2025/03

JAEA-Review-2024-054.pdf:2.73MB

The Nuclear Fuel Cycle Engineering Laboratories conducts environmental radiation monitoring around the reprocessing plant in accordance with the "Safety Regulations for Reprocessing Plant of JAEA, Part IV: Environmental Monitoring". This report summarizes the results of environmental radiation monitoring conducted during the period from April 2023 to March 2024 and the results of dose calculations for the surrounding public due to the release of radioactive materials from the plant into the atmosphere and ocean. In the results of the above environmental radiation monitoring, several items were affected by radioactive materials emitted from the accident at the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company, Incorporated (changed to Tokyo Electric Power Holdings, Inc. on April 1, 2016), which occurred in March 2011. In addition, environmental monitoring plan, analysis and measurement methods, monitoring data and their chronological change, meteorological data after statistical processing, status of radioactive waste release and evaluation results of the data over the normal range are included as appendices.

Journal Articles

Current numbers of qubits and their uses

Ichikawa, Tsubasa*; Hakoshima, Hideaki*; Inui, Koji*; Ito, Kosuke*; Matsuda, Ryo*; Mitarai, Kosuke*; Miyamoto, Koichi*; Mizukami, Wataru*; Mizuta, Kaoru*; Mori, Toshio*; et al.

Nature Reviews Physics (Internet), 6(6), p.345 - 347, 2024/06

https://doi.org/10.1038/s42254-024-00725-0

Times Cited Count：12 Percentile：98.47(Physics, Applied)

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2022

Kokubun, Yuji; Nakada, Akira; Seya, Natsumi; Koike, Yuko; Nemoto, Masashi; Tobita, Keiji; Yamada, Ryohei*; Uchiyama, Rei; Yamashita, Daichi; Nagai, Shinji; et al.

JAEA-Review 2023-046, 164 Pages, 2024/03

JAEA-Review-2023-046.pdf:4.2MB

The Nuclear Fuel Cycle Engineering Laboratories conducts environmental radiation monitoring around the reprocessing plant in accordance with the "Safety Regulations for Reprocessing Plant of JAEA, Part IV: Environmental Monitoring". This report summarizes the results of environmental radiation monitoring conducted during the period from April 2022 to March 2023 and the results of dose calculations for the surrounding public due to the release of radioactive materials into the atmosphere and ocean. In the results of the above environmental radiation monitoring, many items were affected by radioactive materials emitted from the accident at the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company, Incorporated (changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016), which occurred in March 2011. Also included as appendices are an overview of the environmental monitoring plan, an overview of measurement methods, measurement results and their changes over time, meteorological statistics results, radioactive waste release status, and an evaluation of the data which deviated of the normal range.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2021

Nakada, Akira; Kanai, Katsuta; Seya, Natsumi; Nishimura, Shusaku; Futagawa, Kazuo; Nemoto, Masashi; Tobita, Keiji; Yamada, Ryohei*; Uchiyama, Rei; Yamashita, Daichi; et al.

JAEA-Review 2022-078, 164 Pages, 2023/03

JAEA-Review-2022-078.pdf:2.64MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2021 to March 2022. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2020

Nakada, Akira; Nakano, Masanao; Kanai, Katsuta; Seya, Natsumi; Nishimura, Shusaku; Nemoto, Masashi; Tobita, Keiji; Futagawa, Kazuo; Yamada, Ryohei; Uchiyama, Rei; et al.

JAEA-Review 2021-062, 163 Pages, 2022/02

JAEA-Review-2021-062.pdf:2.87MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2020 to March 2021. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2019

Nakano, Masanao; Fujii, Tomoko; Nemoto, Masashi; Tobita, Keiji; Seya, Natsumi; Nishimura, Shusaku; Hosomi, Kenji; Nagaoka, Mika; Yokoyama, Hiroya; Matsubara, Natsumi; et al.

JAEA-Review 2020-069, 163 Pages, 2021/02

JAEA-Review-2020-069.pdf:4.78MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2019 to March 2020. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2018

Nakano, Masanao; Fujii, Tomoko; Nemoto, Masashi; Tobita, Keiji; Kono, Takahiko; Hosomi, Kenji; Nishimura, Shusaku; Matsubara, Natsumi; Maehara, Yushi; Narita, Ryosuke; et al.

JAEA-Review 2019-048, 165 Pages, 2020/03

JAEA-Review-2019-048.pdf:2.69MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2018 to March 2019. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2017

Nakano, Masanao; Fujita, Hiroki; Mizutani, Tomoko; Nemoto, Masashi; Tobita, Keiji; Kono, Takahiko; Hosomi, Kenji; Hokama, Tomonori; Nishimura, Tomohiro; Matsubara, Natsumi; et al.

JAEA-Review 2018-025, 171 Pages, 2019/02

JAEA-Review-2018-025.pdf:3.81MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2016 to March 2017. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Electric Power Company Holdings, Inc. in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and were exceeded the normal range of fluctuation in the monitoring, were evaluated.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2016

Nakano, Masanao; Fujita, Hiroki; Mizutani, Tomoko; Nemoto, Masashi; Tobita, Keiji; Hosomi, Kenji; Nagaoka, Mika; Hokama, Tomonori; Nishimura, Tomohiro; Koike, Yuko; et al.

JAEA-Review 2017-028, 177 Pages, 2018/01

JAEA-Review-2017-028.pdf:3.61MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2016 to March 2017. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Electric Power Company Holdings, Inc. in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and were exceeded the normal range of fluctuation in the monitoring, were evaluated.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2015

Nakano, Masanao; Fujita, Hiroki; Mizutani, Tomoko; Hosomi, Kenji; Nagaoka, Mika; Hokama, Tomonori; Yokoyama, Hiroya; Nishimura, Tomohiro; Matsubara, Natsumi; Maehara, Yushi; et al.

JAEA-Review 2016-035, 179 Pages, 2017/03

JAEA-Review-2016-035.pdf:4.2MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2015 to March 2016. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Electric Power Company Holdings, Inc. in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and were exceeded the normal range of fluctuation in the monitoring, were evaluated.

JAEA Reports

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2014

Watanabe, Hitoshi; Nakano, Masanao; Fujita, Hiroki; Takeyasu, Masanori; Mizutani, Tomoko; Isozaki, Tokuju*; Nagaoka, Mika; Hokama, Tomonori; Yokoyama, Hiroya; Nishimura, Tomohiro; et al.

JAEA-Review 2015-034, 175 Pages, 2016/03

JAEA-Review-2015-034.pdf:8.13MB

Journal Articles

$L_{3}$ -edge jump and shift on white-line of Pd interlayer for trilaminar neutron production target under H $_{2}$ $^{+}$ irradiation

Ishiyama, Shintaro; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Journal of Chemistry and Chemical Engineering, 8(9), p.870 - 875, 2014/09

https://doi.org/10.17265/1934-7375/2014.09.005

Interlayer Pd for the Li/Pd/Cu neutron target for BNCT (Boron Neutron Capture Therapy) was characterized after 0.1-5 keV H $_{2}$ $^{+}$ irradiation by XAFS technique, and following conclusions were derived; (1) From the XAFS observation of white line of Pd, remarkable Pd $L_{3}$ Edge jump was found in 1.1-3 times higher than before irradiation in low irradiation fluence. (2) This fact indicates increase of hole density in Pd 4d-band, whereas no change was observed for XASF spectra of Ag sample under the same irradiation conditions. (3) Remarkable Pd $L_{3}$ Edge shift of 0.12-0.66 eV was also found with increase of H $_{2}$ $^{+}$ irradiation energy in low fluence, and drastically decreased after peak in high irradiation energy and fluence.(4)Implanted protons deposited in Pd as negative under the balance of electron population enhanced by proton irradiation and charge transfer.

Journal Articles

Surficial chemical states of Li $_{3}$ N synthesized on lithium target for boron neutron capture therapy

Ishiyama, Shintaro; Baba, Yuji; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Nihon Kinzoku Gakkai-Shi, 78(8), p.322 - 325, 2014/08

https://doi.org/10.2320/jinstmet.J2014022

Times Cited Count：0 Percentile：0.00(Metallurgy & Metallurgical Engineering)

To remove high level of contaminants by O and C from Li $_{3}$ N surface for boron neutron capture therapy target, high temperature thermal desorption was conducted up to 1123 K in ultra high vacuum and the following results were derived; (1) During thermal desorption up to 1023 K, typical three peaks of vacuum pressure disturbance due to vaporization of contaminants were observed in vacuum pressure-temperature curve. (2) Over-layered contaminants with high melting temperature below 1023 K on Li $_{3}$ N surface is completely removed by high temperature thermal desorption up to 1123 K in ultra high vacuum. (3) From these desorption results, it is suggested that these contaminants corresponding to these vaporization peaks are H $_{2}$ O and Li compounds with high melting temperature below 1023 K, of which LiOH and Li $_{2}$ CO $_{3}$ were synthesized by decomposition process of Li $_{3}$ N with residual H $_{2}$ O and CO $_{2}$ in low temperature.

Journal Articles

Low temperature and pressure synthesis of lithium-nitride compound with H $_{2}$ O addition on lithium target for BNCT

Ishiyama, Shintaro; Baba, Yuji; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Nihon Kinzoku Gakkai-Shi, 78(8), p.317 - 321, 2014/08

https://doi.org/10.2320/jinstmet.J2013078

Times Cited Count：0 Percentile：0.00(Metallurgy & Metallurgical Engineering)

Low temperature synthesis of lithium-nitride compound was conducted on the lithium target for BNCT by N $_{2}$ /H $_{2}$ O mixing gas squirt in the ultra high vacuum chamber, and the following results were derived; (1) Lithium-nitride compound was synthesized on the lithium target under 101.3 Pa N $_{2}$ gas squirt at room temperature and in the ultra high vacuum chamber under the pressure of 110 $^{-8}$ Pa. (2) Remarkable contamination by O and C was observed on the lithium-nitride compound synthesized under the squirt pressure of 13.3-80 Pa/1.33-4.7 Pa N $_{2}$ /H $_{2}$ O mixing gas. (3) No contamination and synthesis of Li-N compound was observed under the squirt pressure of 0.013-0.027 Pa/0-0.005 Pa N $_{2}$ /H $_{2}$ O mixing gas. (4) Contamination by O and C was enhanced with excessive addition of H $_{2}$ O at the pressure of over 1.33 Pa.

Journal Articles

Direct synthesis of Li $_{3}$ N thin layer on lithium target surface for BNCT in N $_{2}$ gaseous conditions

Ishiyama, Shintaro; Baba, Yuji; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Nihon Kinzoku Gakkai-Shi, 78(4), p.137 - 141, 2014/04

https://doi.org/10.2320/jinstmet.J2013068

Times Cited Count：0 Percentile：0.00(Metallurgy & Metallurgical Engineering)

To prevent vaporization damage of BNCT (Boron Neutron Capture Therapy) lithium target during operation, direct synthesis of Li $_{3}$ N thin layer on lithium target surface was demonstrated in 0.1 MPa N $_{2}$ gas at temperature below 548 K and the following conclusions were derived; (1) Synthesis of Li $_{3}$ N thin layer on lithium surface was confirmed after nitridation at 276548 K with surface contamination by oxygen and carbon. (2) Rapid nitridation over 1-5wt.%/min was observed above Li melting temperature, whereas slow reaction under 0.02-0.5 wt.%/min below melting temperature. (3) During nitridation, removal of oxygen contamination on Li $_{3}$ N thin layer is taken place by nitrogen below Li melting temperature.

Journal Articles

3KeV H $_{2}$ $^{+}$ irradiation to Li/Pd/Cu trilaminar neutron production target for BNCT

Ishiyama, Shintaro; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Materials Transactions, 55(4), p.658 - 663, 2014/03

https://doi.org/10.2320/matertrans.M2013403

Times Cited Count：3 Percentile：15.44(Materials Science, Multidisciplinary)

The Li/Pd/Cu trilaminar structures of the synthesized target for BNCT were characterized under 3keV H $_{2}$ $^{+}$ irradiation by XPS and XAFS technique, which provides structural/electronic properties of solids, and information about the local structure, such as the nature and number of surrounding atoms and inter-atomic distances. Following conclusions were derived; (1) Pd-Cu physical bonding was produced between the Pd and Cu interface by electro-less plating Pd deposition on a high purity Cu plate (2) From the XAFS observation of white line of Pd, the Pd 3 Edge jump was found after H $_{2}$ $^{+}$ irradiation, this fact indicates increase of hole density in Pd 4-band. (3) 0.9 eV chemical shift was also observed in Pd 3 white line for Pd/Cu samples, which will affect the quality of the Li/Pd/Cu target due to the formation of PdH $_{x}$ in palladium insert layer.

Journal Articles

Surficial chemical states of Li $_{3}$ N synthesized on lithium target for boron neutron capture therapy

Ishiyama, Shintaro; Baba, Yuji; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Materials Transactions, 55(3), p.539 - 542, 2014/01

https://doi.org/10.2320/matertrans.M2013257

Times Cited Count：2 Percentile：10.81(Materials Science, Multidisciplinary)

To remove high level of contaminants by O and C from Li $_{3}$ N surface for BNCT target, high temperature thermal desorption was conducted up to 1123 K in ultra high vacuum and the following results were derived; (1) During thermal desorption up to 1023 K, typical three peaks of vacuum pressure disturbance due to vaporization of contaminants were observed in vacuum pressure-temperature curve. (2) Over-layered contaminants with high melting temperature below 1023 K on Li $_{3}$ N surface is completely removed by high temperature thermal desorption up to 1123 K in ultra high vacuum. (3) From these desorption results, it is suggested that these contaminants corresponding to these vaporization peaks are H $_{2}$ O and Li compounds with high melting temperature below 1023 K, of which LiOH and Li $_{2}$ CO $_{3}$ were synthesized by decomposition process of Li $_{3}$ N with residual H $_{2}$ O and CO $_{2}$ in low temperature.

Journal Articles

Low temperature and pressure synthesis of lithium-nitride compound with H $_{2}$ O addition on lithium target for BNCT

Ishiyama, Shintaro; Baba, Yuji; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Materials Transactions, 54(12), p.2233 - 2237, 2013/12

https://doi.org/10.2320/matertrans.M2013242

Times Cited Count：6 Percentile：32.80(Materials Science, Multidisciplinary)

Low temperature synthesis of lithium-nitride compound was conducted on the lithium target for BNCT by N $_{2}$ /H $_{2}$ O mixing gas squirt in ultra high vacuum chamber, and the following results were derived; (1) Lithium-nitride compound was synthesized on lithium target under 101.3 PaN $_{2}$ gas squirt at room temperature and 1 10 $^{-8}$ Pa in ultra high vacuum chamber. (2) Remarkable contamination by O and C was observed on the lithium-nitride compound synthesized by 13.3 80 Pa/1.33 4.7 Pa N $_{2}$ /H $_{2}$ O mixing gas squirt. (3) No contamination and synthesis of Li-N compound was observed at 0.013 0.027 Pa/0 0.005 Pa N $_{2}$ /H $_{2}$ O squirt. (4) Contamination by O and C is enhanced with excessive addition of over 1.33 Pa H $_{2}$ O addition.

Journal Articles

Thermal stability of BNCT neutron production target synthesized by lithium deposition and ion implantation

Ishiyama, Shintaro; Baba, Yuji; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Nihon Kinzoku Gakkai-Shi, 77(11), p.509 - 513, 2013/11

https://doi.org/10.2320/jinstmet.J2013048

Times Cited Count：1 Percentile：9.69(Metallurgy & Metallurgical Engineering)

To testify thermal stability of the BNCT neutron target synthesized by lithium deposition and ion implantation, laser heating test of the Li $_{3}$ N/Li/Cu tri-layered target was conducted in high vacuum chamber of 10 $^{-6}$ Pa and thermal stability of the tri-layered target was characterized by X-ray photoelectron spectroscopy. Following conclusions were derived; (1) The Li $_{3}$ N/Li/Cu tri- layered target with very low oxide and carbon contamination was synthesized by lithium deposition and ion implantation techniques without H $_{2}$ O and O $_{2}$ additions (2) The starting temperature of evaporation of the Li $_{3}$ N/Li/Cu tri-layered target increased by 120 K compared to that of the Li/Cu target and (3) frequent repair synthesis of the damaged Li $_{3}$ N/Li/Cu tri-layered target caused by evaporation is possible.

Journal Articles

Thermal stability of BNCT neutron production target synthesized by lithium deposition and ion implantation

Ishiyama, Shintaro; Baba, Yuji; Fujii, Ryo*; Nakamura, Masaru*; Imahori, Yoshio*

Materials Transactions, 54(9), p.1760 - 1764, 2013/09

https://doi.org/10.2320/matertrans.M2013062

Times Cited Count：4 Percentile：25.11(Materials Science, Multidisciplinary)

Li $_{3}$ N synthesis on Li deposition layer was conducted without H $_{2}$ O and O $_{2}$ by lithium deposition in high vacuum chamber of 10 $^{-6}$ Pa and ion implantation techniques and the thermo-chemical stability of the Li $_{3}$ N/Li/Cu tri-layered target under laser heating and air exposure was characterized by X-ray photoelectron spectroscopy. Following conclusions were derived; (1) Li $_{3}$ N/Li/Cu tri- layered target with very low oxide and carbon contamination was synthesized by lithium deposition and ion implantation techniques without H $_{2}$ O and O $_{2}$ additions and frequent synthesis of the target is possible. (2) The evaporating temperature of Li deposited layer increased by 120 K after forming the Li $_{3}$ N layer on the surface of Li. (3) Remarkable oxidation and carbon contamination were observed on the surfaces of Li/Cu and Li $_{3}$ N/Li/Cu after air exposure and these contaminated compositions formed on the surface of Li $_{3}$ N/Li/Cu was not removed by Ar heavy sputtering.