PUBLISHED PAPER
    
 
99.A. Khumaeni, Z.S. Lie, Y.I. Lee, K. Kurihara, K.H. Kurniawan, K. Fukumoto, K. Kagawa, H. Niki, Emission Characteristics of Ca and Mg Atoms in Gas Plasma Induced by the Bombardment of Transversely Atmospheric CO2 Laser at 1 atm, Jpn. J. Appl. Phys., 51,  (2012) pp. 082403-1-9.
98.Z.S. Lie, A. Khumaeni, H. Niki, K. Kurihara, K.H. Kurniawan, R. Hedwig, K. Fukumoto, K. Kagawa, Y.I. Lee, A Comprehensive Study of H Emission in TEA CO2 Laser-Induced Helium Gas Plasma for Highly Sensitive Analysis of Hydrogen in Metal Samples, J. Korean Phys. Soc. 61, 1, (2012) pp.49-54.
97.H. Suyanto, Z.S. Lie, H. Niki, K. Kagawa, K. Fukumoto, R. Hedwig, S.N. Abdulmadjid, A.M. Marpaung, M. Pardede, M.M. Suliyanti, A.N. Hidayah, E. Jobiliong, T.J. Lie, M.O. Tjia, K.H. Kurniawan, Quantitative Analysis of Deuterium in Zircaloy Using Double-Pulse Laser-Induced Breakdown Spectrometry (LIBS) and Helium Gas Plasma without a Sample Chamber, Anal. Chem. 84, 5, (2012) pp. 2224-2231.
96.M.M. Suliyanti, A. N. Hidayah, M. Pardede, E. Jobiliong, S.N. Abdulmadjid, N. Idris, M. Ramli, T.J. Lie, R. Hedwig, M.O. Tjia, Koo H. Kurniawan, Z.S. Lie, H. Niki, K. Kagawa: Double Pulse Spectrochemical Analysis Using Orthogonal Geometry with Very Low Ablation Energy and He Ambient Gas, Spectrochim. Acta Part B; At. Spectrom. B69, 7 (2012) pp. 56-60.
95.Z.S. Lie, A. Khumaeni, K. Kurihara, K.H. Kurniawan, Y.I. Lee, K. Fukumoto, K. Kagawa, H. Niki, Excitation Mechanism of H, He, C, and F Atoms in Metal-Assisted Atmospheric Helium Gas Plasma Induced by Transversely Excited Atmospheric - Pressure CO2 Laser Bombardment,  Jpn. J. Appl. Phys., 50 (2011) pp. 122701 1-7.
94.A.M. Marpaung, Z.S. Lie, H. Niki, K. Kagawa, K. Fukumoto, M. Ramli, S.N. Abdulmadjid, N. Idris, R. Hedwig, M.O. Tjia, M. Pardede, M.M. Suliyanti, E. Jobiliong, K.H. Kurniawan, Deuterium Analysis in Zircaloy Using ps Laser-Induced Low Pressure Plasma,  J. Appl. Phys., 110,  6 (2011) pp. 063301 1-6.
93.Z.S. Lie, H. Niki, K. Kagawa, M.O. Tjia, R. Hedwig, M. Pardede, E. Jobiliong, M.M. Suliyanti, S.N. Abdulmadjid, K.H. Kurniawan, Observation of Exclusively He-Induced H Emission in Cooled Laser Plasma,  J. Appl. Phys., 109,  10 (2011) pp. 103305 1-4.
92.A. Khumaeni, Z.S. Lie, H. Niki, K.H. Kurniawan, E. Tjoeng, Y.I. Lee, K. Kurihara, Y. Deguchi, K. Kagawa,  Direct Analysis of Powder Samples Using Transversely Excited Atmospheric CO2 Laser-Induced Gas Plasma at 1 atm, Anal and Bioanal. Chem, 400,  (2011) pp. 3279-3287
91.M.M. Suliyanti, M. Pardede, T.J. Lie, K.H. Kurniawan, A. Khumaeni, K. Kagawa, M.O. Tjia, Y.I. Lee, Direct Powder Analysis by Laser-Induced Breakdown Spectroscopy Utilizing Laser-Controlled Dust Production in a Small Chamber, J. Korean Phys. Soc. 58, 5 (2011) pp.1129-1134
90.S.N. Abdulmadjid, Z.S. Lie, H. Niki, M. Pardede, R. Hedwig, T.J. Lie, E. Jobiliong, K.H. Kurniawan, K. Fukumoto, K. Kagawa, M.O. Tjia,  Quantitative  Deuterium  Analysis of Titanium Samples in UV Laser-Induced Low-Pressure Helium Plasma, Appl. Spectrosc. 64, 4 (2010) pp. 365-369.
89.R. Hedwig, Z.S. Lie, K.H. Kurniawan, A.N. Chumakov, K. Kagawa, M.O. Tjia, Toward Quantitative Deuterium Analysis with Laser-Induced Breakdown Spectroscopy Using Atmospheric-Pressure Helium Gas, J. Appl. Phys. 107, 2 (2010) pp. 023301  1-5.
88.M. Pardede, T.J. Lie, Koo H. Kurniawan, H. Niki, K. Fukumoto, T. Maruyama,  K. Kagawa and M.O. Tjia, Crater Effects on H and D Emission from Laser-Induced Low-Pressure Helium Plasma,  J. Appl. Phys., 106,  6 (2009) pp. 063303 1-6.
87.Z.S. Lie, M. Pardede, R. Hedwig, M.M. Suliyanti, E. Steven, Maliki, Koo H. Kurniawan, M. Ramli, S.N. Abdulmadjid, N. Idris, K. Lahna, K. Kagawa and M.O. Tjia, Intensity Distributions of Enhanced H Emission from Laser-Induced Low-Pressure He Plasma and a Suggested He-Assisted Excitation Mechanism,  Virtual J. of Ultrafast Sci. 8, 9 (2009) pp. 043303 1-6
86.Z.S. Lie, M. Pardede, R. Hedwig, M.M. Suliyanti, E. Steven, Maliki, Koo H. Kurniawan, M. Ramli, S.N. Abdulmadjid, N. Idris, K. Lahna, K. Kagawa and M.O. Tjia, Intensity Distributions of Enhanced H Emission from Laser-Induced Low-Pressure He Plasma and a Suggested He-Assisted Excitation Mechanism,  J. Appl. Phys., 106,  3 (2009) pp. 043303 1-6
85.Koo H. Kurniawan, T.J. Lie, M.M. Suliyanti, R. Hedwig, M. Pardede, M. Ramli, H. Niki, S.N. Abdulmadjid, N. Idris, K.  Lahna, Y. Kusumoto, K. Kagawa, M.O. Tjia,  The Role of He in Enhancing the Intensity and Lifetime of H and D Emissions from Laser-Induced Atmospheric-Pressure Plasma,  J. Appl. Phys. 105 (2009) pp. 103303-1-6.
84.N. Idris, S.N. Madjid, M. Ramli, K.H. Kurniawan, Y.I. Lee, K. Kagawa, Monitoring of Laser Processing Using Induced Current Under an Applied Electric Field on Laser Produced Plasma, J. Mater. Process. Tech. 209, 6 (2009) pp. 3009-3021.
83.Koo H. Kurniawan, T.J. Lie, M.M. Suliyanti, M. Pardede, S.N. Abdulmadjid,  K. Kagawa, M.O. Tjia, Quenching of He-Induced Intensity Enhancement Effect in H and D Emission Produced by Nd-YAG Laser Irradiation on Solid Targets in Low Pressure Helium Gas, J. Appl. Phys.  105 (2009) pp. 013301-1-7.
82.A. Khumaeni, S. Tanaka, A. Kobayashi, Y.I. Lee, K.H. Kurniawan, K. Ishi, K. Kagawa: Demonstrations of the Action and Reaction Law and the Energy Conservation Law Using Fine Spherical Plastic Beads, Phys. Educ. 43, 6 (2008) pp. 637-643.
81.A. Khumaeni, M. Ramli, Y. Deguchi, Y.I. Lee, N. Idris, K.H. Kurniawan, T.J. Lie, K. Kagawa: New Technique for the Direct Analysis of Food Powders Confined in a Small Hole Using Transversely Excited Atmospheric CO2 Laser-Induced Gas Plasma, Appl. Spectrosc., 62, 12, (2008) pp. 1344-1348.
80.Zener S. Lie,  M. Pardede, R. Hedwig, M.M. Suliyanti, K.H. Kurniawan, Munadi, Y.I. Lee, K. Kagawa, I. Hattori, M.O. Tjia,  Spectrochemical Analysis of Powder Using 355 nm Nd-YAG Laser-Induced Low Pressure Plasma, Anal and Bioanal. Chem, 390, 7 (2008) pp. 1781-1787
79.M. Ramli, N. Idris, H. Niki, Koo H. Kurniawan, K. Kagawa, New Method of Laser Plasma Spectroscopy for Metal Samples Using Metastable He Atoms Induced by Transversely Excited Atmospheric Pressure CO2 Laser in He Gas at 1 atm., Jpn. J. Appl. Phys., 47, 3, (2008) pp. 1595-1601
78.Munadi, M. Pardede, R. Hedwig, M.M. Suliyanti, T.J. Lie, Z.S. Lie, Koo H. Kurniawan, K. Kagawa, M. Ramli, K. Fukumoto, T. Maruyama, M.O. Tjia, Study of Hydrogen and Deuterium Emission Characteristics in Laser Induced Low Pressure Helium Plasma for the Suppression of Surface Water Contamination, Anal. Chem. 80, 4 (2008) pp. 1240-1246
77.M. Ramli, K. Fukumoto, H. Niki, S.N. Abdulmadjid, N. Idris, T. Maruyama, K. Kagawa, M.O. Tjia, M. Pardede, K.H. Kurniawan, R. Hedwig, Z.S. Lie, T.J. Lie, D.P. Kurniawan, Quantitative Hydrogen Analysis of Zircaloy-4 in Laser-Induced Breakdown Spectroscopy with Ambient Helium Gas,  Appl. Opt. 46 (2007) pp. 8298-8304. 
76.M. Pardede, R. Hedwig, M.M. Suliyanti, Z.S. Lie, T.J. Lie, D.P. Kurniawan, K.H. Kurniawan, M. Ramli, K. Fukumoto, H. Niki, S.N. Abdulmadjid, N. Idris, T. Maruyama, K. Kagawa, M.O. Tjia, Comparative Study of Laser-Induced Plasma Emission of Hydrogen from Zircaloy-2 Samples in Atmospheric and Low Pressure Ambient Helium Gas,  Appl. Phys. B. 89, 2-3 (2007) pp. 291 - 298.
75.M. Ramli, N. Idris, K. Fukumoto, H. Niki, F. Sakan, T. Maruyama, K.H. Kurniawan, T.J. Lie, K. Kagawa, Hydrogen Analysis in Solid Samples by Utilizing Helium Metastable Atoms Induced by TEA CO2 Laser Plasma in Helium Gas at 1 Atmosphere, Spectrochim. Acta Part B: At. Spectrom. 62, 12  (2007) pp. 1379-1389
74.N. Idris, K. Kagawa, K.H. Kurniawan, Y.I. Lee, New Electrode Configuration for Measurements of the Induced Current from a Laser Plasma and Its Application to Monitoring Laser Processing, J. Korean Phys. Soc. 51, 2 (2007) pp. 515-521.
73.Y.I. Lee, N. Idris, Koo H. Kurniawan, T.J. Lie, K. Tsuyuki, S. Miura, K. Kagawa, Subtarget Effect in Film Analysis Using TEA CO2 Laser-Induced Plasma, Curr. Appl. Phys. 7, 5 (2007) pp.540-546.
72.K.H. Kurniawan, M. Pardede, R. Hedwig, Z.S. Lie, T.J. Lie, D.P. Kurniawan, M. Ramli, K. Fukumoto, H. Niki, S.N. Abdulmadjid, N. Idris, T. Maruyama, K. Kagawa, M.O. Tjia, Quantitative Hydrogen Analysis of Zircaloy-4 Using Low-Pressure Laser Plasma Technique, Anal. Chem. 79,7 (2007) pp. 2703-2707. 
71.M. Ramli, K. Kagawa, S.N. Abdulmadjid, N. Idris, W.S. Budi, M.A. Marpaung, K.H. Kurniawan, T.J. Lie, M.M. Suliyanti, R. Hedwig, M. Pardede, Z.S. Lie, M.O. Tjia, Some Notes on the Role of Meta-Stable Excited State of Helium Atom in Laser-Induced Helium Gas Breakdown Spectroscopy, Appl. Phys. B. 86, 4 (2007) pp. 729-734. 
70.R. Hedwig, W.S. Budi, S.N. Abdulmadjid, M. Pardede, M.M. Suliyanti, T.J. Lie, D.P. Kurniawan, Koo H. Kurniawan, K. Kagawa, M.O. Tjia, Film Analysis Employing Subtarget Effect Using a 355 nm Nd-YAG Laser-Induced Plasma at Low Pressure, Spectrochim. Acta B61 (2006) pp.1285-1293.
69.Koo H. Kurniawan, T.J. Lie, M. Pardede, R. Hedwig, M.M. Suliyanti, S.N. Abdulmadjid, Y.I. Lee, K. Kagawa, Effects of Mass Difference on Pressure-Dependent Emission Characteristics in Laser-Induced Plasma Spectroscopy, Appl. Phys. B. 85, 4 (2006) pp. 631-636.
68.Koo H. Kurniawan, T.J. Lie, M.M. Suliyanti, R. Hedwig, M. Pardede, Davy P. Kurniawan, Y. Kusumoto, K. Kagawa, Quantitative Analysis of Deuterium Using Laser-Induced Plasma at Low Pressure of Helium, Anal. Chem. 78, 16(2006) pp. 5768-5773.
67.Koo H. Kurniawan, K. Kagawa, Hydrogen and Deuterium Analysis Using Laser-Induced Plasma Spectroscopy, Appl. Spectrosc. Rev. 41, 1 (2006) pp. 99-130.
66.T.J. Lie, Koo H. Kurniawan, D.P. Kurniawan, M. Pardede, M.M. Suliyanti, A. Khumaeni, S.N. Natiq, S.N. Abdulmadjid, Y.I. Lee, K. Kagawa, N. Idris, M.O. Tjia, Elemental Analysis of Bead Samples Using a Laser-Induced Plasma at Low Pressure, Spectrochim. Acta Part B: At. Spectrom. 61, 1, (2006) pp. 104-112.
65.S.N. Abdulmadjid, M.M. Suliyanti, Koo H. Kurniawan, T.J. Lie, M. Pardede, R. Hedwig, K. Kagawa, M.O. Tjia, An Improved Approach for Hydrogen Analysis in Metal Samples Using Single Laser-Induced Gas Plasma and Target Plasma at Helium Atmospheric Pressure, Appl. Phys. B. 82, 1 (2006) pp. 161-166.
64.K. Tsuyuki, S. Miura, N. Idris, Koo H. Kurniawan, T.J. Lie, K. Kagawa, Measurement of Concrete Compressive Strength Using the Emission Intensity Ratio Between Ca (II) 396.8 nm and Ca (I) 422.6 nm in Nd-YAG Laser-Induced Plasma, Appl. Spectrosc. 60, 1 (2006) pp. 61-64.
63.Y.I. Lee, N. Idris, T.J. Lie, Koo H. Kurniawan, D.P. Kurniawan, K. Kagawa, Production of Artificial Snow Crystals in Summer or Under Tropical Conditions, Phys. Update, 9, 1 (2005) pp. 38-42.
62.Koo H. Kurniawan, T.J. Lie, M.M. Suliyanti, R. Hedwig, S.N. Abdulmadjid, M. Pardede, N. Idris, T. Kobayashi, Y. Kusumoto, K. Kagawa, M.O. Tjia, Detection of Deuterium and Hydrogen Using Laser-Induced Helium Gas Plasma at Atmospheric Pressure, J. Appl. Phys. 98, 9 (2005) pp. 093302 1-3.
61.M.M. Suliyanti, S. Sardy, A. Kusnowo, M. Pardede, R. Hedwig, Koo H. Kurniawan, T.J. Lie, Davy P. Kurniawan, K. Kagawa, Preliminary Analysis of C and H in a "SANGIRAN" Fossil Using Laser-Induced Plasma at Reduced Pressure, J. Appl. Phys. 98, 9 (2005) pp. 093307 1-8.
60.M. Pardede, Koo H. Kurniawan, T.J. Lie, R. Hedwig, N. Idris, T. Kobayashi, T. Maruyama, Y.I. Lee, K. Kagawa and M.O. Tjia, Hydrogen Analysis in Solid Samples Using Laser-Induced Helium Plasma at Atmospheric Pressure,  J. Appl. Phys., 98, 4 (2005) pp.043105 1-5. 
59.N. Idris, T. Kobayashi, M.M. Suliyanti, Koo H. Kurniawan, T.J. Lie, K. Kagawa, Y.I. Lee, Utilization of Confinement Effect on Solid Organic Samples on Spectrochemical Analysis Using TEA CO2 Laser Induced Plasma, J. Korean Phys. Soc. 47, 2 (2005) pp.256-262
58.W. Setia Budi, I. Marhaendrajaya, Wuryanti, N. Idris, K. Kagawa, T.J. Lie and Koo H. Kurniawan, Effect of Focusing on Charge-Induced Current and Spectral Emission in a Plasma Generated by a Nd:YAG Laser at Low Pressures, J. Spectrosc. Soc. Jpn. 54, 3 (2005) pp. 170-175.
57.M.M. Suliyanti, S. Sardy, A. Kusnowo, R. Hedwig, S.N. Abdulmadjid, Koo H. Kurniawan, T.J. Lie, M. Pardede, K. Kagawa, M.O. Tjia, Plasma Emission Induced by an Nd-YAG Laser at Low Pressure on Solid Organic Sample, Its Mechanism and Analytical Application, J. Appl. Phys. 97, 5 (2005) pp. 053305-1 - 9.
56.T.J. Lie, Koo H. Kurniawan, R. Hedwig, M. Pardede, M.O. Tjia, N. Idris, T. Kobayashi, Y.I. Lee, K. Kagawa, Low Pressure Plasma Confined in a Miniature Cylindricall Chamber and Its Application for In-situ Elemental Analysis, Jpn. J. Appl. Phys., 44, 1 (2005) pp. 202-209.
55.N. Idris, S. Terai, T.J. Lie, Koo H. Kurniawan, T. Kobayashi, K. Kagawa, T. Maruyama, Hydrogen Emission Induced by TEA CO2 Laser Bombardment on Solid Samples at Low Pressure and Its Analytical Application, Appl. Spectrosc., 59, 1 (2005) pp. 115-120.
54.Koo H. Kurniawan, T.J. Lie, N. Idris, T. Kobayashi, T. Maruyama, K. Kagawa, M.O. Tjia and A.N. Chumakov,   Hydrogen Analysis of Zircalloy Tube Used in Nuclear Power Station Using Laser Plasma Technique,  J. Appl. Phys., 96, 11 (2004) pp. 6859-6862
53.N. Idris, T. Kobayashi, Koo H. Kurniawan, T.J. Lie, T. Maruyama and K. Kagawa, Deutereum Emission in Laser Plasma Induced by Transversely Excited Atmospheric Pressure CO2 Laser in Low-Pressure of Helium Surrounding Gas, Jpn. J. Appl. Phys., 43, 11A (2004)pp. 7531-7535. 
52.M. Pardede, Koo H. Kurniawan, T.J. Lie, M.O. Tjia, Y. I. Lee and K. Kagawa, Dependence of the Charge Current Induced by Nd-YAG Laser Bombardment on the Surrounding Gas Pressure and Laser Pulse Energy, Jpn. J. Appl. Phys., 43, 11A (2004) pp. 7524-7530.
51.Koo H. Kurniawan, T.J. Lie, N. Idris, T. Kobayashi, H. Suyanto, T. Maruyama, K. Kagawa and M.O. Tjia, Hydrogen Emission by Nd-YAG Laser-Induced Shock Wave Plasma and Its Application to the Quantitative Analysis of Zircalloy, J. Appl. Phys., 96, 3 (2004) pp. 1301-1309.
50.K. Kagawa, N. Idris, M. Wada, Koo H. Kurniawan, K. Tsuyuki and S. Miura, Carbon Analysis for Inspecting Carbonation of Concrete Using TEA CO2 Laser-Induced Plasma, Appl. Spectrosc., 58, 8 (2004) pp. 887-896.
49.N. Idris, Koo H. Kurniawan, T.J. Lie, T. Kobayashi, M. Pardede, H. Suyanto, R. Hedwig, K. Kagawa and T. Maruyama, Characteristics of Hydrogen Emission in Laser Plasma Induced by Focusing Fundamental Q-sw YAG Laser on Solid Samples, Jpn. J. Appl. Phys., 43, 7A (2004) pp. 4221-4228.
48.H. Oki, H. Suyanto, Koo H. Kurniawan, T.J. Lie, Y.I. Lee, F. Sakan, N. Idris, and K. Kagawa, Water Analysis by Laser-Induced Shock Wave Plasma Spectroscopy Using Re-crystallized KBr Powder Confined in a Cylindrical Tube, Jpn. J. Appl. Phys., 43, 3 (2004) pp. 1036-1037.
47.Koo H. Kurniawan, A. Chumakov, T.J. Lie, M.O. Tjia, M. Ueda. K. Kagawa, Emission Spectrochemical Analysis Using High Stability and High Repetition Rate Nitrogen Laser, J. Appl. Spectrosc., 71, 1 (2004) pp. 5-9.
46.H. Suyanto, Koo H. Kurniawan, T.J. Lie, M.O. Tjia and K. Kagawa: Hole-Modulated Plasma for Suppressing Background Emission in Laser-Induced Shock Wave Plasma Spectroscopy, Jpn. J. Appl. Phys. 42 , 8 (2003) pp. 5117-5122.
45.S.N. Madjid, I. Kitazima, T. Maruyama, T.J. Lie, M.O. Tjia, Koo H. Kurniawan, K. Kagawa: TEA-CO2 Laser-Induced Shock Wave Plasma Modulated by Wires and Needles Placed in front of the Target at Low Pressure, Appl. Spectrosc. 57, 7 (2003) pp. 874-877.
44.S.N. Madjid, I. Kitazima, T.J. Lie, Koo H. Kurniawan, K. Kagawa, K. Ikezawa and T. Maruyama: Spectrochemical Analysis Using Low Background Laser Plasma Induced by Nd-YAG Laser at Low Pressure, Jpn. J. Appl. Phys. 42, 6A (2003) pp. 3452-3457.
43.R. Hedwig, T.J. Lie, M.O. Tjia, K. Kagawa and Koo H. Kurniawan: Confinement Effect in Enhancing Shock Wave Plasma Generation at Low Pressure by TEA CO2 Laser Bombardment on Quartz Sample, Spectrochim. Acta Part B: At. Spectrom. 58, 3 (2003) pp. 531-542.
42.M. Pardede, Koo H. Kurniawan, T.J. Lie, M. O. Tjia and K. Kagawa: Direct Measurement of Charge Current by Employing a Mesh Electrode in the Laser Plasma Induced by Nd-YAG Laser at Low Pressure (I), Appl. Spectrosc. 56, 8 (2002) pp. 994-999.
41.H. Suyanto, Koo H. Kurniawan, T.J. Lie, M.O. Tjia and K. Kagawa, Direct Analysis of Powder Samples by Laser Plasma Method Using Confinement Technique, Spectrochim. Acta Part B: At. Spectrom. 57, 8 (2002) pp. 1325-1332.
40.S.Nur Madjid, Koo H. Kurniawan, I. Kitajima and K. Kagawa: Shock Wave and Emission with Sheet-Like Structure Induced by YAG Laser Ablation at Reduced Pressure, Jpn. J. Appl. Phys. 41 6A (2002) pp. 3747-3751.
39.R. Hedwig, Koo H. Kurniawan, K. Kagawa: Confinement Effect of Primary Plasma on Glass Sample Induced by Irradiation of Nd-YAG Laser at Low Pressures, Jpn. J. Appl. Phys. 40 10 (2001) pp. 5938-5941.
38.M. Pardede, Koo H. Kurniawan, M.O. Tjia, K. Ikezawa, T. Maruyama and K. Kagawa: Spectrochemical Analysis of Metal Elements Electrodeposited From Water Sample by Laser Induced Shock Wave Plasma Spectroscopy, Appl. Spectrosc. 55 9 (2001) pp. 1229-1236.
37.Koo H. Kurniawan, M.M. Suliyanti, T.J. Lie, K. Kagawa and M.O. Tjia: Application of Primary Plasma Standardization to Nd-YAG Laser-Induced Shock-Wave Plasma Spectrometry for Quantitative Analysis of High Concentration Au-Ag-Cu Alloy, Spectrochim. Acta Part B; At. Spectrom B56, 9 (2001) pp. 1407-1417.
36.Y. Suwa, H.H. Myint, Koo H. Kurniawan, F. Ito and K. Kagawa: A New Method for Producing Snow Crystals Using a Mixture of Salt and Ice, Phys. Educ. 36, 4 (2001) pp. 293-298.
35.H.H. Myint, A.M. Marpaung, Koo H. Kurniawan, H. Hattori and K. Kagawa: Water Droplet Lens Microscope and Microphotographs, Phys. Educ. 36, 2 (2001) pp. 97-101.
34.A.M. Marpaung, Koo H. Kurniawan, M.O. Tjia and K. Kagawa: Comprehensive Study on the Pressure Dependence of Shock Wave Plasma Generation Under TEA CO2 Laser Bombardment on Metal Sample, J. Phys. D: Appl. Phys. 34, 5 (2001) pp. 758-771.
33.Koo H. Kurniawan, H. Suyanto, K. Kagawa, T. Maruyama and M.O. Tjia: Low-Background Laser Plasma Induced by Nd-YAG Laser at Low Pressures, Jpn. J. Appl. Phys. 40, 1 (2001) pp. 188-194.
32.Koo H. Kurniawan, K. Lahna, T. J. Lie, K. Kagawa and M.O. Tjia: Detection of Density Jump in Laser-Induced Shock-Wave Plasma Using Rainbow Refractometer, Appl. Spectrosc., 55, 1 (2001) pp. 92-97.
31.W. Setia Budi, A. Rahman, Koo H. Kurniawan, M.O. Tjia and K. Kagawa: Bending of Shock Wave Plasma Induced by Q-switched Nd-YAG Laser at Low Pressures, Rev. of Laser Eng. 29, 3 (2001) pp. 180-183.
30.Koo H. Kurniawan, T.J. Lie, N. Idris, M.O. Tjia, M. Ueda and K. Kagawa: Detection of the Density Jump in the Laser Induced Shock Wave Plasma Using Low Energy Nd-YAG Laser at Low Pressure of Air, J. Spectrosc. Soc. Jpn. 50, 1 (2001) pp. 13-18.
29.A.M. Marpaung, R. Hedwig, M. Pardede, T.J. Lie, M.O. Tjia, K. Kagawa, Koo H. Kurniawan: Shock Wave Plasma Induced by TEA CO2 Bombardment on Glass Samples at High Pressures, Spectrochim. Acta Part B; At. Spectrom. B55, 10 (2000) pp. 1591-1599.
28.Koo H. Kurniawan, T. J. Lie, K. Kagawa and M.O. Tjia: Laser-Induced Shock Wave Plasma Spectrometry Using a Small Chamber Designed for in Situ Analysis, Spectrochim. Acta Part B; At. Spectrom. B55, 7 (2000) pp. 839-848.
27.A.M. Marpaung, M.H. Syah’roni, Koo H. Kurniawan, M.O. Tjia and K. Kagawa: Selective Vaporization in Q-sw Nd-YAG Laser Induced Shock Wave Plasma at Low Pressures , Rev. of Laser Eng., 28, 7 (2000) pp. 435-440.
26.A.M. Marpaung, M. Pardede, R. Hedwig, Koo H. Kurniawan, T.J. Lie and K. Kagawa: Coincidence of Density Jump and the Front of Plasma Emission Induced by TEA CO2 Laser Bombardment at Low and High Pressures, Jpn. J. Appl. Phys., 39, 6B (2000) pp. L601-L603.
25.K. Kagawa, T.J. Lie, R. Hedwig, S. Nur Abdulmajid, M.M. Suliyanti and Koo H. Kurniawan: Subtarget Effect on Laser Plasma Generated by Transversely Excited Atmospheric CO2 Laser at Atmospheric Gas Pressures, Jpn. J. Appl. Phys., 39, 1, 5A (2000) pp. 2643-2646.
24.W. Setia Budi, W.T. Baskoro, M. Pardede, Koo H Kurniawan, M.O. Tjia, K. Kagawa: Neutral and Ionic Emission in Q-sw Nd-YAG Laser Induced Shock Wave Plasma, Appl. Spectrosc., 53, 11 (1999) pp. 1347-1351.
23.W. Setia Budi, H. Suyanto, Koo H. Kurniawan, M.O. Tjia and K. Kagawa: Shock Excitation and Cooling Stage in the Laser Plasma Induced by a Q-switched Nd:YAG Laser at Low Pressures, Appl. Spectrosc., 53, 6 (1999) pp. 719-730.
22.M.M. Suliyanti, Rinda, Koo H. Kurniawan and K. Kagawa: The Role of a Sub-Target in the TEA CO2 Laser-Induced Shock Wave Plasma, Jpn. J. Appl.Phys. 37, 12 (1998) pp. 6628-6632.
21.K. Kagawa and Koo H. Kurniawan: Laser Induced Shock-Wave Plasma Spectroscopy, Research Trends: Trends in Applied Spectroscopy, (Research Trends, India, Eds. R.M. Barnes and M.W. Blades, vol. 2, 1998) pp. 1-36.
20.Koo H. Kurniawan, M. Pardede, K. Kagawa and M.O. Tjia: The Effect of Selective Vaporization on the TEA CO2 Laser-Induced Shock-Wave Plasma, J. Spectrosc. Soc. Jpn., 47, 5 (1998) pp. 220-227.
19.H.Hattori, H. Kakui, Koo H. Kurniawan, K. Kagawa: Liquid Refractometry by the Rainbow Method, Appl. Opt. 37, 19 (1998) pp. 4123-4129.
18.Koo H. Kurniawan, Y. Ishikawa, S. Nakajima and K. Kagawa: Characteristics of the Secondary Plasma Induced by Focusing a 10 mJ XeCl Laser Pulse at Low Pressures, Appl. Spectrosc. , 51, 12 (1997) pp. 1769-1780.
17.Koo H. Kurniawan, W.S. Budi, M.M. Suliyanti, A.M. Marpaung and K. Kagawa: Characteristics of a Laser Plasma Induced by Irradiation of a Normal Oscillation YAG Laser at Low Pressures, J. Phys. D: Appl. Phys. 30 (1997) pp. 3335-3345.
16.Koo H. Kurniawan and K. Kagawa: Laser-Induced Shock Wave Plasma Using Long-Pulse YAG Laser, Appl. Spectrosc., 51, 3, (1997) pp. 304-308.
15.H. Hattori, H. Yamanaka, Koo H. Kurniawan, S. Yokoi and K. Kagawa: Using Minimum Deviation of a Secondary Rainbow and its Application to Water Analysis in a High-Precision, Refractive-Index Comparator for Liquids., Appl. Opt. 36, 22 (1997) pp. 5552-5556.
14.Koo H. Kurniawan, K. Kagawa, M. Okamoto, M. Ueda, T. Kobayashi and S. Nakajima: Emission Spectrochemical Analysis of Glass Containing Li and K in High Concentration Using a XeCl Excimer Laser-Induced Shock Wave Plasma , Appl. Spectrosc., 50, 3, (1996) pp. 299-305.
13.Koo H. Kurniawan, S. Nakajima, J.E. Batubara, M. Marpaung, M. Okamoto, K. Kagawa: Laser-Induced Shock Wave Plasma in Glass and Its Application to Elemental Analysis, Appl. Spectrosc., 49, 8, (1995) pp. 1067-1072.
12.Koo H. Kurniawan, M.O. Tjia, M. Barmawi, S. Yokoi, Y. Kimura and K. Kagawa: A Time-Resolved Spectroscopic Study on the Shock Wave Plasma Induced by the Bombardment of a TEA CO2 Laser, J. Phys. D: Appl. Phys., 28, (1995) pp. 879-883.
11.K. Kagawa, H. Hattori, M. Ishikane, M. Ueda, Koo H. Kurniawan: Atomic Emission Spectrometric Analysis of Steel and Glass Using a TEA CO2 Laser-Induced Shock Wave Plasma, Anal. Chim. Acta, 299, (1995) pp. 393-399.
10.Koo H. Kurniawan, T. Yamada, T. Kobayashi and K. Kagawa: Single Line and Diffraction Limited UV Nitrogen Lasers, Jpn. J. Appl. Phys., 32, 6A, (1993) pp. L785-L787.
9.M. Tani, Koo H. Kurniawan, H. Ueda, K. Mizukami, K. Kawai and K. Kagawa: Reflection and Diffraction of Laser Plasma Induced by Bombardment of TEA CO2 Laser at Low Pressures, Jpn. J. Appl. Phys., 32, 9A, (1993) pp. 3838-3839.
8.W. Hardjoutomo, H. Munechika, Koo H. Kurniawan, I. Hattori, T. Kobayashi and K. Kagawa: A Compact TEA CO2 Laser for Field-Based Spectrochemical Analysis of Geological Samples, Opt. & Laser Tech., 24, 5, (1992) pp. 273-277.
7.Koo H. Kurniawan, T. Kobayashi, S. Nakajima and K. Kagawa: Correlation Between the Front Speed and Initial Explosion Energy of the Blast Wave Induced by a TEA CO2 Laser, Jpn. J. Appl. Phys., 31, 4, (1992) pp. 1213-1214.
6.Koo H. Kurniawan, N. Ikeda, T. Kobayashi and K. Kagawa: Emission Spectrochemical Analysis of Halogen Atoms Using Shock Wave Plasma Induced by a TEA CO2 Laser, J. Spectrosc. Soc. Jpn., 41, 1, (1992) pp. 21-30.
5.Koo H. Kurniawan, T. Kobayashi and K. Kagawa: The Effect of Different Atmospheres on the Excitation Process of TEA CO2 Laser Induced Shock Wave Plasma, Appl. Spectrosc., 46, 4, (1992) pp. 581-586.
4.Koo H. Kurniawan, T. Kobayashi and K. Kagawa: Detection of Fluorine with a Shock Wave Plasma Induced by a TEA CO2 Laser, Rev. of Laser Eng., 20, 1, (1992) pp. 31-37.
3.K. Kagawa, Y. Deguchi, A. Ogata, Koo H. Kurniawan, N. Ikeda and Y. Takagi: Emission Spectrochemical Analysis of Food Material Using TEA CO2 Laser Induced Shock Wave Plasma, Jpn. J. Appl. Phys., 30, 11A, (1991) pp. L1899-L1901.
2.K. Kagawa, Koo H. Kurniawan, T. Kobayashi: Twin N2 Laser for Time Resolved Absorption Spectroscopy and Dye Laser Oscillator-Amplifier Pumping, Opt. & Laser Tech., 23, 4, (1991) pp. 233.
1.Koo H. Kurniawan, M. Barmawi, M.O. Tjia, T. Kobayashi, and K. Kagawa: Compact N2 Laser Oscillator-Amplifier System for Laser Microbeam Application, Opt. & Laser Tech., 23, 2, (1991) pp. 115.