Prof. Atul Saxena

Physics Department

Designation: Professor

Qualifications:

  • Ph.D.  (N.E.H.U. Shillong 1988) “Measurement of Heavy Ion Ranges in Elemental and Complex Media
  • using Solid State Nuclear Track Detectors”
  • Post-Doctoral Research (NEHU, 1988-89) “Radon Monitoring”.
  • M. Phil. (Institute of Advanced Studies, Meerut University, 1981) “Dielectric and Conductivity studies in Vanadium doped Tungsten-Phosphate Glass”
  • M.Sc. (1979)  &  B. Sc. (1977) (Rohilkhand university, Bareilly)

Areas of Interest/Specialization:

  1. Interaction of heavy ions with matter
  2. Natural Radioactivity study
  3. Theoretical Condensed Matter Physics – Material Science
  4. Microearthquake studies
  5. Climate change studies in Meghalaya

Experience: 40 years of Teaching and Research.
    
Ph.D. Awarded/Supervised:

  • Ashok Kumar Jha (2012) “A Study of Elastic Scattering and Electron Capture Processes in Collisions Of 3He2+ Ion With CO Molecule Below 5 Kev”
  • Deveshwori  Maibam (2013) “Studies on Radon Activity in Soil-air, Indoors and in Water at Selected Locations in Meghalaya”
  • Yubaraj Sharma (2013) “Studies on Stopping Powers, Etching and Annealing Characteristics of Heavy Ion Irradiated Nuclear Track Detectors” 
  • Jeeban Prasad Gewali (2013) - “Studies on Heavy Ion Electronic Stopping Power and Thermal Fading Characteristics of Nuclear tracks in Solid State Nuclear Track Detectors”
  • Arnestar Syiemiong: (2012) “A theoretical study of potential energy curves, spectroscopic and molecular properties of the CO+ cation” [Submitted 2019]
  • Alfanel Khardewsaw: (2013) “Studies on Radon and Radium Activity in West and South-West Khasi  Hills District of Meghalaya” [to be submitted 2019]

Registered:

  • Shailes Swer: (2012) “A computational study of stability, transition dipole moment and radiative lifetimes of several low lying electronic states of the CO molecule”
  • Mahesh Ram: (2015) “A Study of Electrical and Magnetic Properties of Cu-Mn and Ni-Mn based Heusler Alloys using Density Functional Theory”
  • Double M Siangshai : (2015 )  “ Study on Relationship Between Radon Concentration in Soil-Air and Earthquake Parameters in the Shillong Plateau”
  • Aibanjop Pyngrope: (2016) “Investigation on radiation exposure due to radon isotopes and their progeny”
  • Nihal Limbu: (2018) “ Study of Electronic and Thermoelectric Properties of Lanthanide Filled Skutterudites ”
  • Raju Kalita (2019) ‘Nuclear Tracks in Solids’ to be registered.
  • Dipangkar Kalita (2019) ‘Range and Stopping Power of heavy ions’ to be registered

Administrative responsibilities undertaken:

  • Head of the Department (2017-2020)

 

Research Projects

Radon monitoring in groundwater of the Northern India region to study the Neotectonic activities and health hazard. BRNS-DAE (2007-10) Measurement of Radon, Thoron and Gamma radiation level in three districts of Meghalaya. BRNS- DAE, (2016-19).

Climate change assessment in selectd areas of Meghalaya using meteorological Measurements and its impact on water resources. DST (2019-2022)

Publications

International Journals:

RSC advances

  1. “Study of half metallicity, structural and mechanical properties in inverse Heusler alloy
    Mn2ZnSi(1-x)Gex and Superlattice”,. (Accepted-2019)

International Journal of Engineering Technology, Management and Applied Sciences

  1. “Radon Activity in Nongkhlaw Village of West-Khasi Hills District, Meghalaya”., 5(3) (2017)380-386 .
  2. “Study On Statistical Correlation between Indoor Radon And Meteorological Parameters” 5(3) (2017) 387-391.
  3. “Spectral Analysis of Indoor Radon Time-Series using Frequency and Time-Frequency Techniques” 4(3) (2017) 358-363.

Acta  Geophysica, Polland

  1.  “Seismotectonic Zones Demarcation in the Shillong Plateau using the Microearthquakes and Radon Emanation Rate  ” 58 (2010) 893-907

Radiation Measurement, Pergamon press,  Great Britain

  1.  “Measurement of Potential Alpha Energy Exposure (PAEE) of Radon and its Progenies in Dwellings in the North Eastern Region of India” 26 (1996) 291-295
  2. “Energy-loss and Mean Ranges of 86Kr and 197Au in Tantalum” 29 (1996) 561-563

Radiation Effects and Defects in Solids, Great Britain

  1. “Response   of   Solid Dielectrics to  the Registration of   Fission  product Tracks” 138 (1996) 335-346
  2.  “Range and Energy-loss of 16.34 MeV/u 238U in Kapton Polyamide” 112 (1990) 149-153

Nuclear Science Journal, Republic of China

  1. “Mean Ranges of  132Xe in Lead” 32 (1995) 203-208

Indoor and Built Environment, Switzerland

  1. “Measurement of Indoor Radon in some Dwellings in Aizawl (India)” 4 (1995) 362-364

Journal of Physics D : Applied  Physics, UK

  1. “Energy-loss and Mean Ranges of  93Nb in Nickel and Tantalum”  23 (1990) 476-480

Nuclear Instruments and Methods in Physics Research, North-Holland

  1. “On the origin of Anomalous Ranges of 1.65 GeV 132Xe ions in Muscovite Mica”  B46 (1990) 46-51
  2. “Response to 350 MeV 90Zr ions of Polycarbonate Detectors” B51 (1990) 168-172
  3. “Energy-Loss measurement of 132Xe in Lead by Nuclear Track Technique” B36 (1989) 276-281

Measurement in Science and Technology, UK

  1. “Calibration  of CR-39 and ZnP-Glass detectors with 350 MeV  90Zr ions” 1 (1990) 903-907

International Journal of Radiation Applications and Instrumentation Part D : Nuclear Tracks and Radiation Measurements, Pergamon press, UK

  1. “Investigations on Fission-fragment Tracks in ZnP-Glass and SR-86 Detectors” 19 (1991) 557-579
  2. “Mean Ranges and Energy-loss of  86 Kr in Aluminum and 238U in Hostaphan Polymer by a Nuclear Track Technique” 17(1990) 447-452
  3. “Stopping of 17.7 MeV/u 86Kr in Nickel”  15 (1988) 341-344
  4. “Range and Energy-loss of  238U in Triafol-TN using CR-39 Track Detectors”15 (1988) 111-114
  5. “Use of CR-39 Detector in Range and Energy-loss measurement of 18.04 MeV/u 93Nb in Aluminium” 15 (1988) 327-330
  6. “Channeling of 1.65 GeV 132Xe in Mica” 15 (1988) 349-352
  7. “Chemical Etching Characteristics of Glass Detectors” 12 (1986) 161-164
  8. "Track Lengths            of Heavy Ions in CR-39 and ZnP-Glass Detectors" 12 (1986)241-244

Gesellschaft fur Schwerionenforschung mbH Darmstadt, GSI Scientific Report, Germany

  1. “Response of CR-39 to  238U  ions”  90-1 (1990) 222
  2. “Calibration  of CR-39 and ZnP-Glass Detectors with 90Zr ions” 89-1 (1989) 252
  3. “Interaction of 350 MeV 90Zr ion with Polycarborate Track Detectors” 89-1 (1989) 253
  4. “Mean Ranges of 1.678 GeV 93Nb in Ni and Ta”  89-1 (1989) 254   
  5. “Passage of 17.7 MeV/u 86Kr in Ta”  88-1(1988) 243
  6.  “Measurement of  93Nb Ranges in Al”  88-1 (1988) 244.
  7. “Measurement of Energy-loss and Track length          of 238U in Kapton” 88-1 (1988) 245
  8. “Passage of 742 MeV 40Ar in Polycarbonate Detectors” 87-1 (1987) 233
  9. “Measurement of 238U Ranges in Makrofol-N” 87-1 (1987) 232
  10. “Measurement of Heavy Ion Track Lengths in ZnP-Glass and CR-39” 86-1 (1986) 258
  11. “Etching and Annealing Characteristics of Latent Tracks in Sodalime Glass Detectors” 86-1 (1986)254
  12. “Measurement of  Energy-loss and Range of 132 Xe in Lead” 86-1 (1986) 248

Indian Journals

Research & Reviews: Journal of Physics

  1. "MRDCI study of doublet states of CO+ ion and its spectroscopic properties", 8(2)(2019) 137-146

Pramana – Journal of Physics

  1.  “Pressure dependent study of electronic and magnetic properties of Mn2ZnSi full Heulser alloy.”, TRANSIENT VII ISSN-2250-0650 (2018) 11-15
  2.  “Tracks of 18.56  MeV/u  40Ar ions in Lexan Polycarbonate Detector” 31 (1988) 197- 203
  3.  “Range and Energy-loss measurements of  238U in Makrofol-N using CR-39 Track Detector” 29 (1987) 485-490

Journal of Applied and Fundamental Sciences

  1. "Theoretical study of the X2Σ+, A2Π and B2Σ+ electronic states of CO+ ion using MRCI
    method", 4(1), (2018) 19-23
  2. “Indoor radon activity concentrations in Nongstoin Town, West Khasi Hills District,
    Meghalaya” 1(2) (2015) 196-199.
  3. “Radon measurements in the soils of Nongstoin and Mairang regions of West Khasi Hills district, Meghalaya”, 1(2) (2015) 228-232.
  4. “Assessment of soil-radium content, indoor radon activity and the associated radiation risks in Kohima town, Nagaland”, 1(1) (2015) 130-135.
  5. “Measurement of radon activity concentrations in the environs of Aizawl city, Mizoram” 1(2) (2015) 207-212.
  6. “A study on the indoor radon concentration in hospitals in the Shillong region, Meghalaya” 1(1) (2015)93-97.
  7. "A theoretical study of potential energy curves and transition dipole moment of the CO+  ion",1(2)(2015)165-168
  8. "Theoretical modelling of nuclear resonance vibrational spectra of complex molecules", 1(2)(2015) 179-181
  9. "A Time-dependent study of electronic spectroscopy of 1, 3, 5 trans-hexatriene molecule", 1(1)(2015)157-159
  10. "A computational study of stability and transition dipole moment of several low lying electronic states of the CO molecule",1(1) (2015)63-66

Indian Journal of Science and Technology

  1. “Annealing Characteristics of 11.56 MeV/u 58Ni  Irradiated Makrofol-E Detector” 6(2013) 63-66
  2.  “Potential Alpha Energy concentration in schools of Shillong, India” 6(2013)152-157.
  3. “Radon Activity in soil-air environment of Forest Urban Residential areas of Shillong, Meghalaya”. 6(2013)141-145.
  4. “Stopping Power of Aluminium for Energetic 238U Ions Using Nuclear-Track Technique”. 6(2013)59-62

Defence Science Journal, DESIDOC

  1. “Investigations on 252Cf  Fission fragment Tracks in Polycarbonate Detectors” 42 (1992) 235- 240

Indian Journal of Physics

  1. “Characterization of X-ray Film base and Overhead Projector Transparency by Nuclear Track Technique” 64A (1990) 381-386

Books:

  1. “Neotectonic Studies and Seismic Event Prediction in the North-Eastern India by Radon monitoring” Geochemical Precursors for Earthquakes, Macmillan India Ltd. (2007)157-162
  2. “Identifying the Active Fault Zones using Geophysical Data in the Shillong Plateau”  Environmental Changes and Geomorphic Hazards, Book Well, New Delhi, Ch. 11,(2008)177-192

Article:

  1. “Trackology–A growing Branch of Science and Technology” Reflexions-Scientific Journal, Physics Dept., NEHU, 2 (1986) 39-47

Conferences/Seminar/ Symposium:

International

International Conference on Systems and Processes in Physics, Chemistry and Biology (ICSPPCB-  2018), March 1-3, 2018

  1. “ Measurement in Some villages of West- Khasi Hills Districts of Meghalaya, India”
  2.  “Measurement of indoor radon, thoron and their progeny concentration in selected villages of    East Khasi Hills district, Meghalaya, India”,
  3. "Theoretical Study on the ground and some low-lying excited electronic states of CO+ molecule"

AIP Conference Proceedings 1951, 030007 (2018).

  1. "Analysis of Franck-Condon factors for CO+ molecule using the Fourier Grid Hamiltonian method"

AIP Conference Proceedings 1951, 030005 (2018)

  1. "Einstein co-e?cients and oscillator strengths for low lying state of CO molecules",

Proceeding of International Conference on System and Processes in Physics, Chemistry and Biology, (2018).

  1. "Theoretical study on the ground and some low-lying excited electronic states of CO+ molecules", p.92
  2. "Einstein coefficients, oscillator strength and vibrational levels for low lying state of CO molecule", p.119

9th National Conference on Thermo Physical Properties (NCTP), Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamilnadu, Nov 6-8, (2017).

  1. "Analysis of Franck-Condon Factors for CO+ molecule using Fourier Grid Hamiltonian Method"
  2. "Einstein coe?cient and oscillator strength for low lying states of CO molecule"

13th Annual meeting AOGS, , Beijing, China July 31-Aug 5 (2016)

  1.  Seismotectonics and Radon Emanation in Parts of Shillong Plateau

35th International Geological Congress, Cape Town, South Africa, Aug 27 – Sept 4 (2016)

  1. “Radon and Active Tectonics in parts of Shillong Plateau”.

 
4th International Earthquake Symposium, Dhaka Bangladesh, (2013)

  1. “Radon and Active Tectonics in the Shillong Area”

34th  International Geological Congress, Brisbane, Australia, Aug 5-10 (2012)

  1.  “ Radon in potable water of Shillong Meghalaya, India” Handbook P.87
  2.  “ Radon variation in soil-gas and seismotectonics of the Shillong plateuHandbook p.288

AOGS-AGU (WPGM) Joint Assembly, Singapore, Aug 13-17 (2012)

  1. “ Relationship between the radon variation in soil-gas and active tectonics of the Shillong Plateau”

 3rd International Geo-Hazard Research Symposium, Garhwal, June 10-14 (2012)

  1. “Relationship between the radon variation in soil-gas and seismic events recorded in Shillong” Abs.p.107
  2. “Measurement of radon activity concentration and radium content in soil samples of Nongrah area,Shillong” Abs. p.42

3rd International Earthquake Symposium, Bangladesh, Dhaka, Bangladesh (2010)

  1. “Radon and active tectonics in the Shillong area”

7th International Conference on High Levels of Natural Radiation and Radon Areas, Mumbai (2010)

  1. “Indoor radon levels in schools of Shillong, Meghalaya”
  2. “Radon concentration in spring and ground-water of Shillong agglomeration”

International Geo-Hazards Research Symposium, ?stanbul, Turkey, March 9-11 (2009)

  1. “Seismotectonic zones demarcation in the Shillong plateau using the microeathquakes and radon emanation”

Procedings of DAE-BRNS Theme meeting Radon 2008 – Advances in the methods of assessment of exposure due to radon, thoron and their decay products, BARC, Mumbai, March 11-13(2008)

  1. “Radon and active tectonics”

Indo-Polish joint Seminar on Environmental Changes and Geomorphic Hazards, NEHU, Shillong, Nov 20-22 (2006)

  1. “Delineation of active fault zones using Geophysical data in parts of Shillong plateau”

International Brain Storming Session on Earthquake Prediction, Saha Institute of Nuclear Physics, Calcutta, Sept 11-13 (2006)

  1. “Neotectonic studies and seismic event prediction in the North-Eastern India by radon monitoring”  Abs.  p.38

15th  International Conference on Particle Tracks in Solids, Marburg, Germany, Sept 3-7 (1990)

  1. “On the possible track formation for 238U ions  in CR-39 ” Abs.

14th  International Conf. on Solid State Nuclear Track Detectors, Lahore, Pakistan, April 2-6 (1988)

  1. “Range and energy-loss of 238U in Triafol-TN using CR-39 track detector”. Abs. p. 26
  2. “Use of CR-39  detector  in  range and energy-loss  measurement of 18.04 MeV/u 93Nb in aluminium.” Abs. p.88
  3.  “Stopping of 17.7 MeV/u 86Kr in nickel” Abs.  p.92
  4. “Channeling of 1.65 GeV 132Xe in mica” Abs.  p.93

13th  International Conference on Solid State Nuclear Track Detectors, Rome, Italy (1985)

  1.  “Chemical etching characteristics of glass detectors” Abs., p 43
  2.   "Track  lengths of heavy ions in CR-39 and ZnP-glass detectors."  Abs. p 63

National

National Seminar on recent advancements in Science and Technology, June 12-14 (2019)

  1.  “Comparative case study between Bare-mode LR-115 Detector Film and Pin-hole Dosimeter in The measurement of Indoor radon”,

National Conference on “Trends in Science & Technology”, Organized by Department of Computer Science & Applications, Mathematics & Physics, Salesian College, Siliguri, Feb 27-28, (2019).

  1. “Heusler alloy Cu2MnAl: GGA + U study”,

A National conference on Trends in Modern Physics, Feb22 – 23 (2019).

  1. “Measurement of indoor radon activity levels in Jowai region, Meghalaya, India”,

National Conference on Innovations in Science and Technology (NCIST-17) March 20-21 (2017) 

  1. “Spectral Analysis Of Indoor Radon Time-Series using Frequency And Time-Frequency Techniques”,
  2. “Radon activity in Nongkhlaw village of West-Khasi Hills district, Meghalaya”
  3. “Studies on indoor radon activity concentration in two villages of West-Khasi Hills District of Meghalaya, India”

CPP-IPR Silver Jubilee Symposium, Guwahati, Assam, April 21-22, (2016)

  1. “Measurement of radium, radon exhalation rates in soil and indoor radon activity in Nongkhlaw town, West Khasi Hills District, Meghalaya”

National seminar on Climatic Aberrations: Contemporary dilemma of the anthropogenic climate in socio and ecological issues, Sankardev College, Shillong Meghalaya, July 23-24(2015)

  1.  “Measurement of Radon activity concentration in the dwellings of Nongstoin town, West Khasi Hills District, Meghalaya”

National conference on new approaches of basic sciences towards the development of engineering and technology, NABSET (2015)

  1.  “Measurement of radon activity concentrations in the environs of Aizawl City, Mizoram”, Abs. p.69
  2.  “Radon Measurements in the Soils of Nongstoin and Mairang regions of West Khasi Hills District, Meghalaya”,Abs. p.71
  3.  “Indoor radon activity concentrations in Nongstoin Town, West Khasi Hills District, Meghalaya”, Abs. p.73
  4.  “Assesment of Soil-Radium content, Indoor Radon Activity and the associated Radiation risks in Kohima Town, Nagaland”, Abs. p.74

CPP-IPR Workshop on Linear Tokamak Divertor Simulators for PSI Studies, Centre of Plasma Physics, Institute for Plasma Research, Sonapur, Assam, Nov 24-26 (2014)

  1. “ Indoor Radon activity concentration in Nongstoin Town, West Khasi Hills District,  Meghalaya”,

Climatic Aberration: Contemporary dilemma of the anthropogenic climate in social and ecological issues, Sankardev College, Shillong, July 23-24 (2015)

  1. “Measurement of radon activity concentration in the dwellings of Nongstoin town, West Khasi Hills District, Meghalaya”
  2. “Relation between indoor radon and meteorological parameters”
  3. “Frequency and time-frequency analysis of indoor radon time-series”

National Conference on New Approaches of Basic Sciences towards the Development of Engineering and Technology, School of Technology, Assam Don Bosco University (2015)

  1. “Radon measurements in the soils of Nongstoin and Mairang regions of West khasi hills district, Meghalaya”.
  2. “Measurements of radon activity concentrations in the environs of Aizawl city, Mizoram”.
  3. “Indoor radon activity concentrations in Nongstoin town, West Khasi hills district, Meghalaya”
  4. “Assessment of soil-radium content, indoor radon activity and the associated radiation risks in Kohima town, Nagaland”
  5. “A study on the indoor radon concentration in hospitals in the Shillong region, Meghalaya”

CPP-IPR Workshop on Linear Tokamak Divertor Simulator for PSI studies, Sonapur, Assam, Nov 24-26 (2014)

  1. “Measurement of Radon Concentration in some dwellings of Nongstoin West- Khasi Hills District, Meghalaya”,

Proceedings 18th  National Symposium on Solid State Nuclear Tracks Detectors and their Applications, (SSNTDs-18) Vadodara, Oct 18-20 (2013)

  1. “ Ranges and Stopping Power of Energetic 238U in Tantalum using Nuclear-Tracks Technique”
  2.  “ Automated Segmentation Technique for Alpha Tracks in Coloured LR-115 films”

National Conference on Physical Science, D.H.S.K. College, Dibrugarh, Assam, Sept 13-14 (2013)

  1. “Radon Levels in Potable Ground Water of Shillong Agglomeration”
  2.  “Error estimation in the SSNTD Technique used for Radon Activity Measurements”

National Conference on New Approaches of Basic Sciences towards the Development of Engineering and Technology, NABSET, Gauhati, March 1-2 (2013)

  1.  “Stopping power of aluminium for enegetic  238U Ions Using nuclear-track technique”
  2. “ Annealing characteristics of 11.56 MeV/u 58Ni irradiated Makrofol-E detector”
  3. “ Radon activity in soil-air environment of forest and urban residential areas of Shillong, Meghalaya”
  4. “ Radon activity in and around coal mining areas of Khleihriat (Meghalaya) and its potential health hazards”
  5. “Potential alpha energy concentration in schools of Shillong, India,”
  6. “Partial and total single electron capture cross sections in collisions of  3He2+ ions with CO molecule in the keV region”
  7. “Total double electron capture cross sections in collisions of 3He2+ ions with CO molecule in the keV region”

National Workshop on Radiation - A Powerful Tool for Research in Physical, Chemical and Life Sciences, Central University of Jharkand, Ranchi, Feb 13-15 (2013)

  1. Radon activity concentration in soil-air environs of coal mining and its residential areas in Khleihriat (Meghalaya)
  2. Soil-air radon activity concentration in some forested and urban residential areas of Shillong,    Meghalaya”

100th Indian Science Congress, Kolkata, Feb 3-7 (2013)

  1. “ Radon activity concentration in schools of Shillong city in Meghalaya”

99th Indian Science Congress,  Bhubaneswar, Feb 3-7 (2012)

  1. “ Potential radiation hazards due to radon concentration in groundwater of Shillong agglomerate”
  2. Measurement of radon activity concentration and radium content in soil samples of Nongrah, Shillong.
  3. “ Potential alpha energy concentration in some schools of Shillong city”

98th Indian Science Congress, Chennai, Jan 3-7 (2011)

  1. “Alpha radiations in spring and ground-water of Shillong”

17th  National Symposium on SSNTDs and their applications. Vadodara, Oct 17-19 (2011)

  1. “Measurement of potential alpha energy concentration in some schools in Shillong city”,Abs.p 40
  2. “ Radon levels in potable ground water of Shillong agglomeration” Abs. p.53

National Workshop on Earthquake Risk mitigation strategy in the North East Region, Strategy in North East, Guwahati, Feb 24-25 (2011)

  1. “Active fault zones mapping using geophysical data in parts of Shillong plateau”

National Conference on Condensed Matter Physics, NEHU, Shillong, March 22-23 (2010)

  1. “Thermal fading characteristics of 238U ion tracks in Znp-glass detector”Abs. p.21
  2. Electronic stopping power of aluminium and tantalum for energetic 238U ions” Abs. p.22
  3. “Measurement of 222Rn in natural water sources of Shillong using  Alphaguard along with soil-gas using BarasolAbs. p.22
  4. “Measurement of indoor radon and annual effective dose equivalent in and around the Shillong agglomeration” Abs. p.22

National Seminar on Applications of Radiation Technology in Medical Sciences (ARTMS), NEIGRIMS, Shillong, May 15 (2010)

  1. “ Radon concentration in drinking water of eastern part of Shillong”

2nd  India Disaster Management Congress, Vigyan Bhavan, New Delhi, Nov 4-6 (2009)

  1. “ Radon variation in soil environment as earthquake precursor in and around Shillong plateau” p 24, A1/33

96th  Indian Science Congress, NEHU, Shillong, Jan 3-7 (2009)

  1. “Study of radiation induced property modifications of nuclear track detectors”, Physical Sciences. Abs.106 p. 71
  2. “ Radon as an indicator for seismotectonic activities in Meghalaya”, Earth System Sciences Abs. 44 p.38
  3. “Annealing studies of 17.0 MeV/u 132Xe irradiated CR-39 polycarbonate detectors” Chemical  Sciences Abs.235 p. 165

National Workshop on Trace Elements Research, NEHU, Shillong, March 4-6 (2008)

  1. “ Trace element analysis of soils along the Darranga-Dawki profile,North Eastern India”
  2. “Assessment of environmental radon concentration of Shillong city”
  3. “Physicochemical characteristics of hot spring water  from Jakrem and spring water from Umshing East Khasi Hills”

National Seminar on Nuclear Science and its Applications in Various Fields, St. Mary’s College, Shillong, May 15-16 (2008)

  1. “Techniques used for Radon Monitoring”
  2. “Radon concentrations and neotectonic activities in Meghalaya
  3. “A study on radon levels in varied lithology and related health hazards”,
  4. “Radon Levels and their relationships with the active tectonic zones in the North East Region (India)”

 15th  National Symposium on Solid State Nuclear Track Detectors and their Applications at H.N.B. Garhwal University, Srinagar, June 21-23 (2007)

  1. “ Preliminary  investigation of radon  levels in northeastern Indian region” Abs.  p.88
  2. “Radon levels in dwellings and  associated soil in and around Shillong agglomeration” Abs.  p.41-42

1st  India Disaster Management Congress, Vigyan Bhawan, New Delhi, Nov 29-30 (2006)

  1.  “Seismotectonics and seismic event prediction in the north-eastern India by radon monitoring near the hot spring” Abs. p.16

National Seminar on “Modern Developments in Physics”, NEHU, Shillong, Nov 17 (2006)

  1. “Radon:its application in lithological and structural study”
  2.  “Dielectric and conductivity studies in Vanadium doped semiconducting Tungsten Phosphate Glass”
  3. “Electromagnetic Induction of the Earth and its utilities”
  4. “Range and Energy-loss rate of 16.34 MeV/u 238U ions in tantalum by nuclear track technique”

Solid State Nuclear Track Detectors-SSNTD 95 ,(1995)

  1. “Potential Alpha Energy Exposure (PAEE) of Radon and Progeny in Dwellings in Silchar and Aizawl” Proc. P.110

Nuclear and Radiochemistry Symposium(NUCAR 95), BARC, Bombay, Jan 19-22 (1995)

  1.  “Indoor Randon Measurements in Dwellings of  Mizoram” Proc. p.413

VII National Conference on ‘ Particle Tracks in Solids’, Defence Laboratory,  Jodhpur, Oct 9-11 (1991)

  1. “Mean ranges of 132Xe in lead.” Proceedings p. 217 – 223
  2. “Stopping-power of tantalum for energetic  86Kr   ions.” Proceedings p.155 – 162
  3.   “Investigations of 252Cf   fission fragment tracks in polycarbonate detectors” Proceedings p.           191-199

VI National Seminar on Solid State Nuclear Track Detectors’s , Gauhati University, March 16-18 (1989)

  1.  “Measurement of heavy ion tracks in CR-39 detector” Abs. p. 14
  2. “Calibration of CR-39 and ZnP – Glass detector with 90Zr ions”Abs.  p. 18
  3.  “Interaction of 350 MeV 90Zr ions”            Abs.  p. 18
  4. “Energy loss and mean ranges of 1.678 GeV  93Nb in nickel and tantalum” Abs.   p. 19
  5. “Development and characterisation of X-ray film base as nuclear track detector” Abs.  p.  22

V National Seminar on Solid State Nuclear Track Detectors, Saha Institute of Nuclear Physics, Calcutta, (1987)

  1.  ”Passage of 17.7 MeV/u 86 Kr in aluminium” Proce. p. 29-32
  2. “742 MeV 40Ar ion tracks in Lexan polycarbonate” Proce. p. 33-37

Radiochemistry and Radiation Chemistry Symposium, BARC Bombay, Dec 2-6 (1988)

  1.  “Stopping of 17.7 Mev/u 86 Kr in tantalum foils." NR-1.1-1.3 (Awarded paper)
  2. “Measurement of range energy-loss of 238U in Kapton” NR 2.1-2.3 (Awarded paper)
  3. “Passage of 238U in Hostaphan plastic.” NR 2.1-2.3 (Awarded paper)

Radiochemistry and Radiation Chemistry Symposium, S. V. University, Tirupati, Dec 13-17 (1986)

  1. “Range and energy-loss measurements of 238U in Makrofol-N using CR-39 track detector” Proce. P 79-81

Radiochemistry and Radiation Chemistry Symposium IIT-Kanpur, Dec 9-13 (1985)

  1. "Range and energy-loss  measurement of 132Xe in lead using Znp-glass detector”(Awarded    Paper) Proce.  p. 372 - 374.

Collaboration/Consultancy:

International:   

  • R. Buenker & H.P. Liebermann - Fachbereich C–Mathematik und Naturwissenschaften, Bergische
    Universität Wuppertal, Germany
  • L.T. Chadderton -Centre for Environmental mechanics, CSIRO and Laser Physics, Centre, Inst. for
    Ad. Stud, Australian National University, Canberra, Australia.  
  • G. Fiedler,  P. Crombach & E. Reichwein  - II Phsikalisches Institut, Justus-Leibig Universitat,
    Giessen, Germany
  • J.P.  Biersack & D.W.  Fink -  Hahn - Meitner Institute, Berlin, Germany
  • R. Brandt - Kernchemie, Philipps University, Marburg, Germany

National:

  • K.K. Dwivedi - Vice-Chancellor, ITM University, Gwalior.
  • Devesh Walia - Centre for Environmental Studies, NEHU Shillong