Prof. T R Ariyaratne

Prof. T R Ariyaratne

Emeritus Professor

Department of Physics,
University of Colombo,
Colombo 03,
Sri Lanka.
Room: PH 104
Home Phone: +94 11 284 0491
Work Phone: +94 11 215 8343
Work Fax: +94 11 258 4777

Academic Qualifications

  • B.Sc. (Physics Special) Hons. (Ceylon) – 1972
  • Ph.D (Durham) – 1979 Nuclear Instrumentation

Research Interest Mechanistic studies of fast heavy ion and photon induced desorption (i.e. electronic sputtering) of solids: Characterization of photons emitted from organic (especially biomolecules) and inorganic compounds due to fast heavy ion impact. Mass Spectrometry

Refereed Publications:

  1. Some properties of gridded wire chamber for X-ray detection. T.R. Ariyartne, J.M Breare and R.J Stubs; Nucl. Instr. And Meth. 152 (1978) 579.
  2. Study of multiwire proportional counter as a high-count rate X-ray detector. S.Al-dargazlli, T.R. Ariyaratne, J.M. Breare, B.C. Nandi and M. Varrelles; Nucl. Instr. And Meth. 156 (1978) 63.
  3. A study of a gas scintillation multiwire proportional counter. S. Al-dargazelli, T.R. Ariyaratne, J.M.Breare and B.C. Nandi; J.Phys.D Appl.Phys. 11 (1978)1773
  4. Measurment of the drift velocity of electrons in an Argon-Nitrogen mixture. S. Al-dargazelli, T.R. Ariyaratne, J.M.Breare and B.C. Nandi; Nucl. And Instr. And Meth 176 (1980) 579
  5. Charge and light gain measurements in Argon-Nitrogen mixture using a gas scintillation proportional counter. S. Al-dargazelli, T.R. Ariyaratne, J.M. Breare and B.C. Nandi; Nucl. Instr. and Meth 180 (1981) 497.
  6. Study of gas scintillation drift counter as high rate X-ray detector. S. Al-dargazelli, T.R. Ariyaratne, J.M. Breare and B.C. Nandi; Nucl. Instr. and Meth 200 (1982) 341.
  7. On the upper mass limit of secondary ions ejected in electronic sputtering from organic solids. B.U.R. Sundqvist, T.R. Ariyaratne, W.Ens, D.Fenyo, A.Hadin, P Hakansson, G.Jonsson and S Widdiyasekara. Proc Ion Formation rom Organic Solids (IFOS IV) Munster Sep 21.23, Ed: Abenninghoven, John Wiley & Sons 1989 p 51
  8. Fast heavy ion induced photon emission from organic solids and plasma desorption mass spectrometry. T.R.Ariyaratne, D.D.N.B.Daya, P. Hakansson and B.U.R. Sundqvist; Int. J.Mass Spect. Ion Proc. 152 (1996) 31.
  9. Weighing Giant Biomolecules, T. R. Ariyaratne. Presidential Address, SLASS, Section E-1 (1996)
  10. Construction of a keV pulsed ion source and the measurement of damage cross sections for keV ion induced sputtering from solid targets, D.D.N.Barlo Daya, T.R.Ariyaratne, P.Hakansson, B.U.R.Sandqvist, and W.Ens. Ceylon Journal of Science, Physical Sciences. 4 (1) (1997) 23
  11. Kinetic Energy measurements of ions emitted from alkali halides and their mixtures in 252 Cf plasma desorption mass spectrometry, U.K.Abeywarna, R.A.Zubarev, P.Hakansson and T.R.Ariyaratne, Ceylon Journal of Science. 4 (1) (1997) 1.
  12. C.K.G. Piyadasa, P. Håkansson, T.R. Ariyaratne and D.F. Barofsky,A high resolving power ion selector for post source decay measurements in a reflecting time-of-flight mass spectrometer Rapid Communications in MassSpectrometry 12 (1998) 165
  13. I. M. K. Fernando, D.U.J. Sonnadara, K.P.S.C. Jayaratne, T.R. Ariyaratne, S. Namasivayam and K.R.A. Bandara, Study of the performance of direction finding station prior to the implementation of a Lightning Locating System in Sri Lanka, Ceylon Journal of Science: Physical Sciences,05 (1998) 65.
  14. Construction of a matrix assisted laser desorption/iionisation time-of-flight mass spectrometer, R.V. Coorey, T.R. Ariyaratne, D.D.N.Barlo Daya and W.M.K.P. Wijayaratna, Sri Lankan Journal of Physics-Vol 1 ( 2000-March) 33
  15. C.K.G.Piyadasa, P Håkansson and T.R.Ariyaratne. A high resolving power multiple reflection Matrix-assisted Laser Desorption/Ionization time-of-flight mass spectrometer, Rapid Commun. Mass Spectrom., 13, 620 (1999).
  16. Locating cloud to ground lightning flashes with simultaneous two station measurements. D.U. J .Sonnadara, A. B. Weerasekara, I. M. K. Fernando, R. Lelwala, K. P. S. C. Jayaratne, T. R. Ariyaratne, S. Namasivayam, and K. R. A.B andara, Sri Lankan Journal of Physics-Vol 1 ( 2000-March) 1
  17. Physics Education in Sri Lanka – Presidential Address-17th Technical Session, Inst. of Phyiscs, Sri Lanka, (March -2001)77
  18. Measurement of lighting peak currents in the first return stroke negative cloud-to-ground flashes, A.B. Weerasekara, D. U. J. Sonnadara, I. M. K. Fernando, J. P. Liyanage, R. Lelwala and T. R. Ariyaratne, Singapore J. of Physics, 17(2001) 37-45.
  19. Some properties of Lighting ground flashes observed in and around Sri Lanka, and their seasonal variations, J. P. Liyanage, D. U. J. Sonnadara, I. M. K. Fernando, A. B. Weerasekara and T. R. Ariyaratne, Sri Lanka J. of Physics 3(2002) 77-88.

Conferences (International)

  1. Alkali halide cluster ion desorption in MeV atomic ion Impacts. T.R.Ariyaratne, D.D.N.B.Daya,G.Brinkmalm, P.A.Demirev, J Eriksson, P.Hakansson, R.Papaleo and B.U.R. Sundqvist; 13th International Mass Spectrometry Conference 29 Aug.- 02 Sept. Budapest Hungary, Book of Abstracts, E9 (1994) 155.
  2. Ion induced photon emission from solid surfaces. T.R.Ariyaratne, D.D.N.B.Daya, P. Hakansson and B.U.R. Sundqvist: IISC 11th international workshop on inelastic Ion Surface Collisions Sept. 22-27, 1996 Wangerooge, Germany. Book of Abstract page 3.
  3. Fast heavy ion induced photon emission from solid surfaces and its applications in plasma desorption mass spectrometry. T.R.Ariyaratne, D.D.N.B.Daya, P. Hakansson and B.U.R. Sundqvist; Desorption 96. Mass spectrometry of Large Organic Ions by Electrospary, Particle and Photon induced Desorption Ionization, Sept. 18-21 Bornholm, Denmark.
  4. C.K.G.Piyadasa, P.Hakansson, T.R.Ariyaratne, and D.F.Barofsky, A high resolving power ion –selector for tandem time-of-flight mass spectrometry. Desorption-98 Book of Abstracts, 1998.
  5. Scintillating properties of amino acids excited by 252Cf fission fragments, A.M.S.M. Nugegoda, .T.R. Ariyaratne and D.D.N. Barlo Daya, Proceedings (Abstracts), Desorption -2000, St.Malo, France (2000)-P37
  6. Quick detection of active compounds in crude extracts of selected plants using plasma desorption mass spectrometry (PDMS) S.A. Dahanayaka, D.D.N. Barlo Daya, S.B. Mohottalage, G.A.S. Premakumara and T.R. Ariyaratne, Proceedings (Abstracts), Desorption -2000, St.malo, France (2000)-P46

Conferences (Local)

  1. A molecular desorption time-of –flight mass spectrometer. T.R.Ariyaratne and s. Viddiyasekara; Proc. Sri Lanka. Asso.Adv.Sci. E9 (1986) 153.
  2. An investigation of the samples produced by the electrospray technique in molecular desorption mass spectrometry. D.U.J. Sonnadara and T.R. Ariyaratne; Proc. Sri Lanka Assoc. Adc.Sci. E10 (1986) 153.
  3. Measurement of insolation at Colombo, and investigation of its relation with humidity. W.M.K.P. Wijayaratne, K.T.L.De Silva and T.R.Ariyaratne; Proc. Sri Lakna Assoc. Adv. Sci. E44 (1986) 176.
  4. Applications of Californium – 252 Plasma Desorption Mass spectrometry to natural product chemistry. T.R. Ariyartne, D.D.N.B. Daya, G.M.U.W.Doloswala, J.A.D.C.Kumudinie and S. Widdiyasekara; Proc. Sri Lanka Assoc. Adc. Sci. E1 (1990) 17.
  5. Investigation of Cooling effect in porous clay pots. J.P.Wansapura and T.R.Ariyaratne; proc.Sri Lanka Assoc. Adv. Sci. E1-07 (1991)129.
  6. Resolution vs. ion yield study on the first Cf-252 plasma desorption mass spectrometer in Sri Lanka. D.D.N.B.Daya, U.K.Abeywrna, T.R.Aryaratne, and C.K.G.Piyadasa; Proc. Sri Lanka Assoc. adv. Sci. E-17 (1993) 196.
  7. 252-Cf plasma desorption mass spectra of penicillins and the stabilization of molecular ions by cationisation. R.V.Coorey, U.K.Abeywarna, T.R.Ariyaratne, D.D.N.B.Daya and C.K.G.Piyadasa; Proc. Sri Lanka Assoc. Adc.Sci. E-16 (1993) 197.
  8. Performance of the newly constructed linear time-of flight plasma desorption mass spectrometer. C.K.G.Piyadasa, U.K.Abeywarna, T.R.Ariyaratne, R.V.Coorey. D.D.N.B.Daya and W.M.K.P. Wijeratne; Proc. Sri Lanka Assoc. Adv. Sci. E1-06 (1005) 341.
  9. Performance of an electrostatic lens (Einzel lens) as an ion manoeuvring device in a time-of-flight Massw spectrometer. C.K.G.Piadasa, U.K.Abeywarna, T.R.Ariyaratne, R.V.Coorey, D.D.N.B.Daya and W.M.K.P.Wijeratne; Proc. Sri Lanka Assoc. Adv. Sci. E1-07 (1995) 343.
  10. Effect of residual gas pressure on the mass resolution and the molecular ion yield of a time-of-flight mass spectrometer. C.K.G.Piyadasa, T.R.Ariyaratne and W.M.K.P.Wijeratne; proc. Sri Lanka Assoc Adc Sci. E1-17, (1996) 171.
  11. Performance of a low cost second order electrostatic ion mirror for a time-of flight plasma desorption mass spectrometer. C.K.G.Piyadasa, T.R.Ariyaratne and W.M.K.P.Wijayaratne; Proc. Sri Lanka Assoc. Adv. Sci.E1-16 (1996) 170.
  12. Peptide sequence information by partial acid hydrolysis: an analysis by Matrix Assisted Laser Desorption/ Ionization. R.V.Coorey, P. Hakansson, R.A.Zubarev and T.R.Ariyaratne, Proc. Sri Lanka Assoc. Adv. Sci. E2-11 (1996) 184.
  13. Performance of new two-way ion production facility constructed for a plasma desorption mass spectrometer. D.D.N.B.Daya, U.K.Abeywarna, T.R.Ariyaratne, R.V.Cooray, C.K.G.Piyadasa and W.M.K.P.Wijararatne Proc. Sri Lanka. Assoc. Adv. Sci. E1-18 (1996) 171.
  14. An Investigation on the applicability of plasma desorption mass spectrometry in the study of natural products, D.D.N.B.Daya, U.K.Abeywarna, T.R.Ariyaratne, R.V.Cooray, C.K.G.Piyadasa, W.M.K.P.Wijayaratna, and M.S.B.Mohottalage Proc. Of SLAAS 53rd Annual Session Part. 1 (1997) E2-38,362.
  15. A.D. Perera and T.R. Ariyaratne, Measurement of chalk-dust concentrations in class room environments. SLAAS, 54th Annual Session, Book of Abstracts, E1-13 (1998) 239.(30)
  16. D.D.N. Barlo Daya, A.M.S.M. Nugegoda, T.R. Ariyaratne, W.I.N. de Silva and S. Hewage, Application of plasma desorption mass spectrometry in the study of Schiff base metal complexes, SLAAS, 54th Annual Session, Book of Abstracts, E2-15 (1998) 286
  17. I.M.K. Fernando, D.U.J. Sonnadara, K.P.S.C. Jayaratne, S. Namasivayam and T.R. Ariyaratne, Preliminary results of implementing an automated system in Sri Lanka to locate lighting ground flashes, SLAAS, Proc. 54th Annual Session, SriLanka (December 1998) 247.
  18. A.M.S.M.Nugegoda, T.R.Ariyaratne, and Dr. D.D.N.B.Daya, Characterisation of Fast Heavy Ion Induced photon emission from L-amino acids, Proceedings of the Annual Session of Sri Lanka Association for the advancement of Science(SLAAS), E1 (1999) 200.
  19. S.A.Dahanayake, D.D..N.B.Daya, M.S.B.Mohottalage, and T.R.Ariyaratne, Plasma Desorption Mass Spectrometry (PDMS) of crude extracts of medicinal plants. Proceedings of the 55th Annual Sessions of Sri Lanka Association for theAdvancement of Science (SLAAS), E2 (1999) 224.
  20. D.U.J. Sonnadara, I.M.K. Fernando, S. Namasivayam, T.R. Ariyaratne, K.P.S.C.Jayaratne and K.R.A. Bandara, The role of site selection on localizing ground flashes in an automated lighting detection network, IPSL, Proc. 15th Technical Session, Sri Lanka (1999).
  21. A.B. Weerasekera, I.M.K. Fernando, D.U.J. Sonnadara, R. Lelwala, K.P.S.C. Jayaratne, S. Namasivayam, K.R.A. Bandara, C. Gomes, T.R. Ariyaratna, Some features of lightning ground flash activities observed in tropical thunderstorms, SLAAS, Proc. 55th Annual Session, Sri Lanka E1 (1999) 186.
  22. D.U.J. Sonnadara, I.M.K. Fernando, S. Namasivayam, K.P.S.C. Jayaratne, K.R.A. Bandara, R. Lelwala, A.B. Weerasekera, C. Gomes, T.R. Ariyaratne, on the accuracy of locating lightning ground flashes using two or more direction finding stations, SLAAS, Proc. 55th Annual Session, Sri Lanka E1 (1999) 187.
  23. Plasma desorption mass spectrometry (PDMS) of crude extracts of selected medicinal plants, S.A. Dahanayaka, D.D.N. Barlo Daya, G.A.S. Premakumara and T.R. Ariyaratne, Proceedings of the 56th Annual Session of SLAAS (Part 1-Abstracts) E2(2000)238.
  24. Plasma desorption mass spectrometry (PDMS) of plant extracts and its potential application in quantitative estimations, S.A. Dahanayaka, D.D.N. Barlo Daya, M.S.B. Mohottalage, G.A.S. Premakumara, and T.R. Ariyaratne, Abstracts, Annual Session, Faculty of Science, University of Colombo, Vol.1(2000)10
  25. Instrumental development in time of flight technique, G. Piyadasa and T.R. Ariyaratne, Proceedings, 16th Technical Session, Inst. of Phyiscs, Sri Lanka, (March -2000)50
  26. Scintillating properties of the amino acid of tryptophan, A. M. S. M. Nugegoda, T. R. Ariyaratne and D. D. N. B. Daya, SLAAS Proc. 58th Annual Sessions, Sri Lanka.
  27. Ion and UV photon induced fluorescence from di-peptides, A. M. S. M. Nugegoda, T. R. Ariyaratne and D. D. N. B. Daya, SLAAS Proc. 58th Annual Sessions, Sri Lanka.
  28. Improved performance of a linear mode plasma desorption time-of-flight massspectrometer with an electrostatic wire guide , IPSL Proc. 18th Technical Sessions Sri Lanka (2002).
  29. Use of Z-Scores for the admission to Sri Lanka Universities, IPSL Proc. 18th Technical Session, Sri Lanka (2002). Back to top