Ajay Kumar Tyagi

Assistant Professor
Ph.D. (Panjab University, Chandigarh)
Contact Information:
+91-9532098800
Fax: +91-542-2368174
Email Id:ajaytyagi@bhu.ac.in

 
 
Academic Qualifications:
 
S. No.DegreeInstitutionYear
1.B.Sc.CCS University, Meerut1995
2.M.Sc.CCS University, Meerut 1997
3.Ph. D.Panjab University, Chandigarh2006
 
Area of Specialization:
Study of heavy ion fusion fission dynamics
Neutron and Tagged neutron spectroscopy
Surrogate reactions

Experimental condensed matter physics.

Contact Information:
Mobile No:91-9532098800
E-mail: ajaytyagi@bhu.ac.in
Department of Physics
Banaras Hindu University
Varanasi - 221 005, India
List of 10 major Publications(in order of importance):
  • Pre compound neutron evaporation in low energy heavy ion fusion reactions, Ajay Kumar, G. Singh, Hardev Singh, Rajesh Kumar, B.K. Yogi, R.P. Singh, Rakesh Kumar, K.S. Golda, S.K. Datta and I.M. Govil, Nucl. Phys. A798 (1-15), 2008.
  • Observation of new collective Structure of 94Zr: Puzzling Past and Exciting Present, A. Chakraborty, C. Andreoiu,P. Bender,B. P. Crider,D. Cross,G. Demand,A. B. Garnsworthy,P. E. Garrett,G. Hackman, B. Hadinia,S. Ketelhut, Ajay Kumar,K. Leach,M. T. McEllistrem,E.E. Peters,J. Pore,F. M. Prados-Estvez, E. Rand,B. Singh,E. Tardiff,Z. Wang,J. L. Wood, S. W. Yates, Physical Rev. Letter 110, 022504, 2013.
  • Study of angular momentum variation due to entrance channel effect in heavy ion fusion Reactions, Ajay Kumar, Journal of Physics 515 (2014) 012011.
  • Measurement of the elastic differential neutron cross sections for 23na between 1 and 4 MeV, Ajay Kumar et al, J Radioanal Nucl Chem (2014) 302:1043-47.
  • Study of angular momentum hindrance in heavy ion fusion reactions, Ajay Kumar et al., EPJ web 86(00019) 2015.
  • Nuclear structure of 76Ge from inelastic neutron scattering measurements and shell model calculations, S. Mukhopadhyay, B. P. Crider, B. A. Brown, S. F. Ashley, A. Chakraborty, A. Kumar, M. T. McEllistrem, E. E. Peters, F. M. Prados-EstÚvez, and S. W. Yates, Phys. Rev. C 95, 014327 (2017).
  • Seniority structure of 136Xe82 from inelastic neutron scattering, E. E. Peters, P. Van Isacker, A. Chakraborty, B. P. Crider, A. Kumar, S.H. Liu, M. T. McEllistrem, C.V. Mehl, F. M. Prados-EstÚvez, T.J. Ross, J.L. Wood and S.W. Yates, Phys. Rev. C98, 034302 (2018).
  • Effect of energy variation on the dissipative evolution of the system in heavy-ion fusion reactions, N.K.Rai , Vivek Mishra , and Ajay Kumar, Phys. Rev. C98, 024626 (2018).
  • Evaluation of the nuclear excitation functions of fast neutron-induced reactions on 52Cr and 56Fe isotopes A. Gandhi, V. Kumar, N. K. Rai, P. K. Prajapati, B. K. Nayak, A. Saxena, B. J. Roy, N. L. Singh, S. Mukherjee, Yu. N. Kopatch, I. N. Ruskov, D. N. Grozdanov, N. A. Fedorov & A. Kumar, Indian Journal of Physics, 2018.
  • Inelastic Neutron Scattering Study of 76Se, S. Mukhopadhyay, B. P. Crider, B. A. Brown, A. Chakraborty, A. Kumar, M. T. McEllistrem, E. E. Peters, F. M. Prados-Est┤evez, and S. W. Yates, Phys. Rev. C 99, 014313 (2019).
  • Awards/Recognitions if any:
  • Junior Research Fellow (UGC), Dec. 1999 - Feb. 2002.
  • 30 Invited talks including Canada, France, USA, Italy, Russia.
  • Organized International and national conferences at BHU.
  • Warden, Broacha Hostel, July 06, 2012 to July 04, 2018 .
  • Member, Under Graduate Admission Coordination Committee (UACC), BHU.
  • Member, Post Graduate Admission Coordination Committee (PACC), Physics Department, BHU.
  • Member, IQAC, Institute of Science, BHU, Varnasi
  • Member, Organising Committee of Aakanksha, Cultural festival of Institute of Science, BHU, Varanasi.
  • Member, Time table Committee, Physics Department, BHU, Varnasi
  • A. List of publications in referred journals:
  • Dynamical effects in the decay of a compound nucleus; I.M. Govil, R. Singh, A. Kumar, Ajay Kumar, G. Singh, S.K. Kataria and S.K. Datta, Phys. Rev. C62, 064606 (2000).
  • Search for entrance channel effects in heavy ion induced fusion reactions through the compound system79Rb* J. Kaur, I. M. Govil, G. Singh, Ajay Kumar, A. Kumar, B. R. Behera, and S. K. Datta Phys. Rev. C66 034601 (2002).
  • Search for entrance channel effects in the heavy ion induced fusion reactions via neutron evaporation, Ajay Kumar, A. Kumar, G. Singh, B.K. Yogi, Rakesh Kumar, S.K. Datta, M.B. Chatterjee and I.M. Govil, Phys. Rev.C68, 034603(2003).
  • Neutron evaporation as a probe for dynamical effects in heavy ion fusion Reactions, Ajay Kumar, A. Kumar, Hardev Singh, R.P. Singh, K.S. Golda, S. K. Datta and I.M. Govil, V Nuclear Physics Symposium, 2003, Tours, France, AIP Conference Proceedings 704(501) 2004.
  • Anomalous behavior of the level density parameter in neutron and charged particle evaporation, Ajay Kumar, A. Kumar, G. Singh, Hardev Singh, R.P. Singh, Rakesh Kumar, K.S. Golda, S.K. Datta and I.M. Govil, Phy. Rev. C70, 044607 (2004).
  • Dynamical effects in the heavy ion fusion reactions of the compound nucleus 80Sr* via charged particle evaporation; J.Kaur, Ajay Kumar, A. Kumar, G. Singh, S.K. Datta and I.M. Govil, Phys. Rev. C70, 017601, 2004.
  • Entrance channel effects in fission of 197Tl , Hardev Singh, Ajay Kumar, G. Singh, Bivash R. Behera, I. M. Govil, Golda K.S., Pankaj Kumar, Akhil Jhingan, R. P. Singh, P. Sugathan, M. B.Chatterjee, S. K. Datta, Ranjeet, Santanu Pal, and G. Viesti, Phys. Rev. C76, 044610, 2007.
  • Pre compound neutron evaporation in low energy heavy ion fusion reactions, Ajay Kumar, G. Singh, Hardev Singh, Rajesh Kumar, B.K. Yogi, R.P. Singh, Rakesh Kumar, K.S. Golda, S.K. Datta and I.M. Govil, Nucl. Phys. A798 (1-15), 2008.
  • Role of nuclear dissipation and entrance channel mass asymmetry in pre-scission neutron multiplicity enhancement in fusion-fission reactions; Hardev Singh, Golda K.S, Santanu Pal, Ranjeet,Rohit Sandal, Bivash R. Behera, Gulzar Singh, Akhil Jhingan, R. P. Singh, P. Sugathan, M. B.Chatterjee, S. K. Datta, Ajay Kumar, G. Viesti and I. M. Govil, Phys. Rev. C78, 024609, 2008.
  • Level density parameter-A tool to investigate nuclear reaction dynamics, Ajay Kumar, Hardev Singh, G. Singh, K.S. Golda, R.P. Singh and I. M. Govil, AIP Conf. Proc. 1224, 295 (2009).
  • Observation of new collective Structure of 94Zr: Puzzling Past and Exciting Present, A. Chakraborty, C. Andreoiu,P. Bender,B. P. Crider,D. Cross,G. Demand,A. B. Garnsworthy,P. E. Garrett,G. Hackman, B. Hadinia,S. Ketelhut, Ajay Kumar,K. Leach,M. T. McEllistrem,E.E. Peters,J. Pore,F. M. Prados-Estvez, E. Rand,B. Singh,E. Tardiff,Z. Wang,J. L. Wood, S. W. Yates, Physical Rev. Letter 110, 022504, 2013.
  • Spin and parity assignments of ph11/2 band in 127I, S. Chakraborty, H. P. Sharma, P. Banerjee, S. Ganguly, A. Kumar, N. Kaur, S. Kumar, S. Muralithar, R. P. Singh, L. Chaturvedi, A. Kumar, A. K. Jain, and S. Laxhminarayan, AIP Conf. Proc. 1524, 117 (2013).
  • Study of Nuclear Reaction Dynamics through Particle Evaporation, Ajay Kumar, A. Kumar, G. Singh, Hardev Singh, R. P. Singh, Rakesh Kumar, K. S. Golda and I. M. Govil, International conference recent trends in nuclear physics, November 19-21,2012, India, AIP Conf. Proc. 1524, 292 (2013).
  • Elastic and inelastic neutron scattering cross sections for fission reactor applications, Hicks, S. F.; Chakraborty, A.; Combs, B.; Crider, B. P.; Downes, L.; Girgis, J.; Kersting, L. J.; Kumar, A.; Lueck, C. J.; McDonough, P. J.; McEllistrem, M. T.; Peters, E. E.; Prados-Estevz, F. M.; Schniederjan, J.; Sidwell, L.; Sigillito, A. J.; Vanhoy, J. R.; Watts, D.; Yates, S. W., AIP Conference Proceedings;1525, 276 (2013).
  • Study of angular momentum variation due to entrance channel effect in heavy ion fusion Reactions, Ajay Kumar, Journal of Physics 515 (2014) 012011.
  • Differential cross section for neutron elastic and inelastic scattering on 23Na, J.R. Vanhoy, Ajay Kumar et. al, EPJ 66, 03091 (2014).
  • Measurement of the elastic differential neutron cross sections for 23Na between 1 and 4 MeV, Ajay Kumar et al, J Radioanal Nucl Chem (2014) 302:1043-47.
  • Study of angular momentum hindrance in heavy ion fusion reactions, Ajay Kumar et al., EPJ web 86(00019) 2015.
  • Neutron Scattering Differential Cross Sections for 23Na from 1.5 to 4.5 MeV, J.R. Vanhoy, S.F. Hicks, Ajay Kumar et al., Nuclear Physics A 939(2015) 121-140.
  • Inelastic neutron scattering studies of 132,134Xe: Elucidating structure in a transitional region and possible interferences for 0?▀▀ searches, E.E. Peters, T.J. Ross, A. Chakraborty, B.P. Crider, A. Kumar, M.T. McEllistrem, F.M. Prados- EstÚvez, and S.W. Yates, EPJ Web 93, 01027 (2015).
  • No-Spin States and Low-Lying Structures in 130Xe and 136Xe, T.J. Ross, E.E. Peters, A. Chakraborty, B.P. Crider, A. Kumar, S.H. Liu, M.T. McEllistrem, F.M. Prados- EstÚvez, J.R. Vanhoy, and S.W. Yates, , EPJ Web 93, 01010 (2015).
  • Level lifetimes and the structure of 134Xe from inelastic neutron scattering, E. E. Peters, A. Chakraborty, B. P. Crider, S. F. Ashley, E. Elhami, S. F. Hicks, A. Kumar, M. T. McEllistrem, S. Mukhopadhyay, J. N. Orce, F. M. Prados-EstÚvez, and S.W. Yates, Phys. Rev. C 96, 014313 (2017).
  • Nuclear structure of 76Ge from inelastic neutron scattering measurements and shell model calculations, S. Mukhopadhyay, B. P. Crider, B. A. Brown, S. F. Ashley, A. Chakraborty, A. Kumar, M. T. McEllistrem, E. E. Peters, F. M. Prados-EstÚvez, and S. W. Yates, Phys. Rev. C 95, 014327 (2017).
  • Studying of 14.1 MeV neutrons inelastic scattering on light nucleiö, N.A. Fedorov, T.Y. Tretyakova, D.N. Grozdanov, V.M. Bystritskiy, Y.N. Kopatch, I.N. Ruskov, V.R. Skoy, N.I. Zamyatin, D.Wang, F.A. Aliev, C.Hramco, A. Gandhi, A. Kumar, M.G. Sapozhnikov, Y.N. Rogov, E.A. Razinkov and S.Dabylova, Memoirs of the Faculty of Physics, 2, (2018).
  • Study of quasi elastic barrier distribution for the 16O+ 176Yb system, G. Mohanto, A. Parihari, A. Pal, A. Gandhi, S. De, E. T. Mirgule, K. Ramachandran, B. Srinivasan, K. Kalita, A. Kumar, K. Rani, A.Tejaswi, C. Vadagama, Vishal Bharud, Y. K. Gupta, L. S. Danu, B.J. Roy, M. Kushwaha, D. Sarkar, B. K. Nayak, and A. Saxena, Accepted in Physical Review C.
  • Re-measurement of reduced transition probabilities in 132Ba*,S. Dutt , M. Saxena, R. Kumar, A. Jhingan, A. Agarwal, A. Banerjee, R.K. Bhowmik, C. Joshi, J. Kaur, A. Kumar, M. Matejska-Minda, V. Mishra, I.A. Rizvi, A. Stolarz, H.J. Wollersheim and P.J. Napiorkowski, Acta Physica Polonica B, No. 3, 535, Vol.49, 2018.
  • Negative parity three-quasiparticle band in 127I, S. Chakraborty, H. P. Sharma, S. S. Tiwary, C. Majumder, P. Banerjee, S. Ganguly, S. Kumar, A. Kumar, A. Kumar, R. P. Singh and S. Muralithar, Eur. Phys. Journal. A 54: 112 (2018).
  • Measurements of the gamma-quanta angular distributions emitted from neutron inelastic scattering on 28Si, N.A. Fedorov, D.N. Grozdanov, V.M. Bystritskiy, Yu.N. Kopach, I.N. Ruskov, V.R. Skoy, T.Yu. Tretyakova, N.I. Zamyatin, D. Wang, F.A. Aliev, C. Hramco, A. Gandhi, A. Kumar, S. Dabylova, E.P. Bogolubov and Yu.N. Barmakov, EPJ web conferences,177, P02002, (2018).
  • Seniority structure of 136Xe82 from inelastic neutron scattering, E. E. Peters, P. Van Isacker, A. Chakraborty, B. P. Crider, A. Kumar, S.H. Liu, M. T. McEllistrem, C.V. Mehl, F. M. Prados-EstÚvez, T.J. Ross, J.L. Wood and S.W. Yates, Phys. Rev. C98, 034302 (2018).
  • Effect of energy variation on the dissipative evolution of the system in heavy-ion fusion reactions, N.K.Rai , Vivek Mishra , and Ajay Kumar, Phys. Rev. C98, 024626 (2018).
  • Systematic study of iodine nuclei in A~125 mass region, S. Chakraborty, H. P. Sharma, P. Banerjee, S. Ganguly, A. Kumar, N. Kaur, S. Kumar, S. Muralithar, R. P. Singh, L. Chaturvedi, A. Kumar, A. K. Jain, AIP Conference Proceedings 1609, 43 (2014).
  • K and L- shell X-ray Transition-Probability Ratios by Proton Bombardment, P.K. Prajapati and Ajay Kumar, International Journal of Scientific Research in Physics and Applied Sciences Vol.6, Issue.4, pp.10-65, August (2018).
  • Evaluation of the nuclear excitation functions of fast neutron-induced reactions on 52Cr and 56Fe isotopes A. Gandhi, V. Kumar, N. K. Rai, P. K. Prajapati, B. K. Nayak, A. Saxena, B. J. Roy, N. L. Singh, S. Mukherjee, Yu. N. Kopatch, I. N. Ruskov, D. N. Grozdanov, N. A. Fedorov & A. Kumar, Indian Journal of Physics, 2018.
  • Measurement of Angular Distributions of Gamma Rays from the Inelastic Scattering of 14.1-MeV Neutrons by Carbon and Oxygen Nuclei, D.N. Grozdanov, N.A. Fedorov, V.M. Bystritski, Yu.N. Kopach, I.N. Ruskov, V.R. Skoy, T.Yu. Tretyakova, N.I. Zamyatin, D. Wang, F.A. Aliev, C. Hramco, A. Gandhi, A. Kumar, S. Dabylova, E.P. Bogolubov, Yu.N. Barmakov, Physics of Atomic Nuclei, Vol. 81, No. 5, pp. 588ľ594 (2018) ISSN: 1063-7788.
  • Inelastic Neutron Scattering Study of 76Se, S. Mukhopadhyay, B. P. Crider, B. A. Brown, A. Chakraborty, A. Kumar, M. T. McEllistrem, E. E. Peters, F. M. Prados-Est┤evez, and S. W. Yates, Phys. Rev. C 99, 014313 (2019).
  • B. Research Publications In National Symposium/Conferences:
  • Entrance channel effects in the decay of compound nucleus, R.Singh, A. Kumar , Ajay Kumar, J. Kaur, S. K. Datta, G. Singh, S. Kataria and I. M. Govil, DAE Symposium on Nuclear Physics, Chandigarh (1999) p124.
  • Neutron radiation as a probe for reaction mechanism for heavy-ion induced Reaction, Ajay Kumar, J. Kaur, A. Kumar, G. Singh, B. R. Behera, S. K. Datta and I.M. Govil, National Symposium on Radiation Physics, (2001), Patiala.
  • Entrance Channel effects in the decay of the compound nucleus 79Rb, J. Kaur, I. M. Govil, G. Singh, A. Kumar, Ajay Kumar, B. B. Behera and S. K. Datta, DAE Symposium on Nuclear Physics, Calcutta (2001)213.
  • Search For Entrance Channel Effects in Heavy ion fusion reactions via neutron Evaporation, Ajay Kumar, J. Kaur, A. Kumar, G. Singh, Rakesh kumar, S. K. Datta, M. B. Chatterjee, B. K. Yogi and I. M. Govil, DAE Symposium on Nuclear Physics, Calcutta(2001)214.
  • Study of the entrance channel effects in the decay of compound Nucleus, Ajay Kumar, A. Kumar, S.K. Datta and I.M. Govil, DAE Symposium on Nuclear Physics, Thirunelveli 2002.
  • Study of the Entrance Channel effects via the cpompound system 80Sr, J.Kaur, Ajay Kumar, A. Kumar, G. Singh, B. R. Behera, S.K. Datta and I.M. Govil, DAE Symposium on Nuclear Physics, Thirunelveli (2002).
  • ?-Particle Evaporation from Compound Nucleus 76Kr, Ajay Kumar, A. Kumar, G. Singh, Hardev Singh, K.S. Golda, S. K. Datta and I. M. Govil, DAE Symposium on Nuclear Physics, BARC, Mumbai (2003).
  • Entrance channel effects in the decay of compound nucleus, Ajay Kumar, A. Kumar, G. Singh, Hardev Singh, K.S. Golda, S. K. Datta and I. M. Govil, 91st Indian Science Congress, Chandigarh (2004) [Awarded as best poster].
  • Temperature dependence of level density in heavy-ion fusion reactions, Ajay Kumar, A. Kumar, G. Singh, Hardev Singh, K.S. Golda, S. K. Datta and I. M. Govil, DAE Symposium, 8-12 Dec. 2004, BHU, Varanasi, India.
  • Neutron emission from low energy heavy ion fusion reactions, Ajay Kumar, Hardev Singh, G. Singh, K.S. Golda, S. K. Datta and I. M. Govil, DAE Symposium, 11-15Dec. 2007, Sambalpur University, Burla, Orissa, India.

  • Measurement of the Elastic and Inelastic Differential Neutron Cross Sections for 23Na between 1 and 4 MeV, Ajay Kumar, M.T. McEllistrem, B.P. Crider, E.E. Peters, F.M. Prados-Estevez, A. Chakraborty, J.R. Vanhoy, Anthony Sigillito, P.J. McDonough, L.J. Kersting, C.J. Luke, S.F. Hicks, S.W. Yates, DAE Symposium, December 03-07, 2012, India.
  • Low-lying Band Structure and the Onset of Octupole Collectivity in 150Nd, A. Chakraborty,F. M. Prados-Estevez,S. N. Choudry,B. P. Crider,P. E. Garrett,W. D. Kulp, Ajay Kumar,M. T. McEllistrem,S. Mukhopadhyay,M. G. Mynk,J. N. Orce,E. E.Peters, J. L. Wood,S. W. Yates, DAE Symposium, December 03-07, 2012, India.
  • Polarization measurements of 127I, Hari Prakash Sharma,Polash Banerjee,Sourav Ganguly,Saikat Chakraborty,Ashok Kumar,Navneet Kaur,Suresh Kumar,S Muralithar,R P Singh, L Chaturvedi, Ajay Kumar,A K Jain,S Laxhminarayan, DAE Symposium, December 03-07, 2012, India.
  • Low-lying Level Structure of 94Zr: Puzzling Past and Exciting Present, A. Chakraborty, C. Andreoiu,P. Bender,B. P. Crider,D. Cross,G. Demand,A. B. Garnsworthy, P. E. Garrett, G. Hackman, B. Hadinia, S. Ketelhut, Ajay Kumar,K. Leach, M. T. McEllistrem, E. E. Peters, J. Pore, F. M. Prados-Estvez, E. Rand,B. Singh,E. Tardiff,Z. Wang,J. L. Wood,S. W. Yates, DAE Symposium, December 03- 07, 2012, India.
  • Measurement of neutron multiplicity to investigate the role of entrance channel and E/A in nuclear dissipation, V. Mishra,N.K. Rai,Ajay Kumar, DAE Symposium, 2016.
  • Coulomb excitation measurement of $^{132}$Ba at IUAC, New Delhi, S. Dutt,M. Saxena,R. Kumar,A. Jhingan,AvinashAgarwal,A. Banerjee,R. K. Bhowmik,C. Joshi,J. Kaur,A. Kumar,M. Matejska-MindaMishra,V. Mishra,I. A. Rizvi,A. Stolarz,H. J. Wollersheim,P. J. Napiorkowski, DAE, Symposium, 2016.
  • Angular momentum hindrance in mass asymmetric reactions at higher energy range, N.K. Rai,V. Mishra,Ajay Kumar, DAE, Symposium, 2016.
  • Measurement of neutron multiplicity to investigate the role of entrance channel and E/A in nuclear dissipation, V. Mishra,N.K. Rai,Ajay Kumar, National Conference on Recent Trends In Nuclear Physics, Aligarh-2015.
  • Study of anomalous deviations from statistical evaporation spectra in heavy ion fusion reactions, N.K. Rai, V. Mishra, Ajay Kumar, National Conference on Recent Trends In Nuclear Physics, Aligarh-2015.
  • Study of neutron induced reactions using EMPIRE-3 and TALYS ,A.Gandhi,B.J. Roy,V. Mishra,N.K. Rai,V. Kumar,Y. Sawant,B.K. Nayak,A. Saxena,Yu.N. Kopatch,I.N. Ruskov and A. Kumar, DAE-2017. Romashka" and "Romasha" gamma-ray spectrometers, V.M. Bystritsky,Yu.N. Kopatch,V.R. Skoy,I.N. Ruskov,T.Yu. Tretyakova,N.A. Fedorov,D.N. Grozdanov,A. Gandhi,F.A. Aliyev,C. Hramco,W. Dongming,Yu.N. Barmakov,E.P. Bogolyubov,V. Kumar,V. Mishra,N.K. Rai and A.kumar, DAE-2017.
  • TANGRA: Tagged Neutrons and Gamma Rays, A. Gandhi,D.N. Grozdanov,F.A. Aliyev,W. Dongming,N.A. Fedorov,Yu.N. Kopatch,V.R. Skoy,V.M. Bystritsky,I.N. Ruskov,C. Hramco,E.P. Bogolyubov,Yu.N. Barmakov,V. Kumar,V. Mishra,N.K. Rai and A. Kumar, DAE-2017.
  • Effect of Isotopic and N-Z ratio in (n,p) reaction cross section for stable elements(20=Z=60) from reaction threshold to 20 MeV, A. Gandhi, V. Mishra, N.K Rai, V. Kumar and Ajay Kumar, Marie Curie Sesquicentennial Conference-2017, November 5-7, 2017 at JNU, New Delhi.
  • Pre-scission neutron emission from 12C+204Pb and 19F+197Au reactions, Hardev Singh, Ajay Kumar et al., DAE Symposium on Nuclear Physics, Sambalpur University, Burla, Orissa, December 11-15, 2007.
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