Department of Physics - Dr (Mrs) U K Abeywarna

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Dr (Mrs) U K Abeywarna

Dr (Mrs) U K AbeywarnaBSc, MSc (Peradeniya), PhD (Colombo), CPhys, FIP (SL)
Senior Lecturer - Grade I

Specialized Field	:	Mass Spectrometry; Mechanism and Applications
Email Address	:	kanthi@kln.ac.lk
Telephone No	:	+94 (0)11 2 903 350 (ext: 349)
		+94 (0)11 2 917 879 (Residence)
Office Location	:	B1 223/1
Teaching	:	Atomic and Nuclear Physics Biophysics

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Research Interests

Applications in Mass Spectrometry

Thermoelectric properties of semiconductor materials

Selected Publications

UK Abeywarna and TR Ariyaratne, *Electric field penetration effects in time-of-flight measurements,* J. Inst. Phys., Sri Lanka 4 (2003) UK Abeywarna, EPPC Gunawardana, DN Bopege, RRM Rajapakse, RP Wijesundara and W Siripala, *A study of Peltier effect in a thermoelectric couple of n-type cuprous oxide and p-type cuprous sulfide semiconductors,Proc. Annual Research Symp. 2003, University of Kelaniya (2003) UK Abeywarna, RA Zubarev, P Hakansson, and TR Ariyaratne, Kinetic energy measurements of ions emitted from alkali halides and their mixtures in* *²⁵²Cf Plasma Desorption Mass Spectrometry*, Ceylon J. Science: Physical Sciences, 4(1), pp. 1-8 (1997) RA Zubarev, UK Abeywarna, P Demirev, J Eriksson, R Papaleo, P Hakansson and BUR Sundqvist, Delayed, Gas-phase Ion Formation in Plasma Desorption Mass Spectrometry, Rapid Comm. in Mass Spec. 11, pp. 963-972 (1997) DDNB Daya, UK Abeywarna, TR Ariyaratne RV Cooray, CKG Piyadasa, WMKP Wijayaratna and MSB Mohottalage, An investigation on the applicability of plasma desorption mass spectrometry in the study of natural product compounds,Proc. 53^rd Annual Sess., SLAAS, p. 362 (1997) RA Zubarev, U Abeywarna, P Hakansson, P Demirev and BUR Sundqvist, Kinetic Energies of Secondary Ions in MeV and keV Particle-Induced Desorption, Rapid Comm. in Mass Spec. 10, pp. 1966-1974 (1996) RA Zubarev, P Hakansson, U Abeywarna and BUR Sundqvist, Gas-phase molecular ion formation in PDMS and SIMS, Desorption 96 Conference, Denmark (1996) P Hakansson, RA Zubarev, U Abeywarna and BUR Sundqvist, Observations of Chunk Ejection of the Molecular Ions in PDMS and SIMS, ASMS-96 Annual Conference, USA, pp. 12-16 (1996) DDNB Daya, UK Abeywarna, TR Ariyaratne RV Cooray, CKG Piyadasa and WMKP Wijayaratna, Performance of a new two-way ion production facility constructed for a plasma desorption mass spectrometer,Proc. 52^nd Annual Sess., SLAAS, p. 171 (1996) CKG Piyadasa, UK Abeywarna, TR Ariyaratne RV Cooray, DDNB Daya and WMKP Wijayaratna, Performance of the newly constructed linear time-of-flight plasma desorption mass spectrometer, Proc. 51^st Annual Sess., SLAAS, p. 341 (1995) CKG Piyadasa, UK Abeywarna, TR Ariyaratne RV Cooray, DDNB Daya and WMKP Wijayaratna, Performance of an electrostatic lens (Einzel lens) as an ion maneuvering device in a time-of-flight mass spectrometer,Proc. 51^st Annual Sess., SLAAS, p. 343 (1995) DDNB Daya, UK Abeywarna, TR Ariyaratne and CKG Piyadasa, Resolution vs. ion yield study on the first ²⁵²Cf Plasma Desorption Mass Spectrometer in Sri Lanka,Proc. 49^thAnnual Sess., SLAAS, p. 196 (1993) RV Cooray, UK Abeywarna, TR Ariyaratne, DDNB Daya and CKG Piyadasa, ²⁵²Cf plasma desorption mass spectra of penicillins and the stabilization of molecular ions by cationization,Proc. 49^th** Annual Sess., SLAAS, p. 197 (1993)