I pursued Doctorate in the area of Theoretical Nuclear Physics, where Preformed Cluster-decay Model (PCM) and Dynamical Cluster -decay Model (DCM), based on well known Quantum Mechanical Fragmentation Theory (QMFT), have been advanced in collaboration of Gupta and collaborators, to study the nuclear structure and heavy ion collision (HIC) problems. PCM pertains to ground-state decay of parent nuclei whereas the DCM incorporates decay features of excited compound nuclei (CN) formed in HIC. PCM is extended to study the effects of deformations and orientations in exotic cluster radioactivity. As large numbers of experiments are being planned at extreme conditions of temp- erature to study the exotic behaviour of nuclear systems, availability of temperature dependent nuclear potentials is highly desirable. In order to meet this challenge, the calculations and compilation of fitted constants in Seeger’s semi-empirical mass formula, has been carried out, which should be extremely useful for future studies/investigations. This data-set has also been used to study the decay of hot and rotating compound nucleus CN 48Cr *, 202Pb * and 246Bk *.
The DCM has also been extended to study the role of nuclear deformation and orientation in CN decay and its application to heavy mass CN (like 246Bk *) whereby it assumes significant contribution of deformation and orientations. This work has the potential of getting extended to other mass regions to have a good understanding of nuclear structure in general and nuclear dynamics in particular. With present experience I can work independently on nuclear structure problems together with heavy ion collisions, an area opening up to extend the nuclear landscape.
The (ground-state) cluster radioactive-decays have been studied using for the first time the relativistic mean field (RMF) theory within the preformed cluster model (PCM) of Gupta and collaborators during the post-doctoral research. Interestingly, the RMF theory supports the concept of preformation of both the alpha and heavier clusters in radioactive nuclei.
Publications
Publications in Referred Journals:
1. Entrance-channel effects in the dynamical cluster decay model for the decay of hot and rotating compound nucleus 48Cr at E cn * ~ 60 MeV.:
BirBikram Singh, Manoj K. Sharma, Raj K. Gupta and W. Greiner, Int. J. of Mod. Phys. E (Nucl. Phys.) Vol. 15, No. 3 (2006) 699.
2. Shape changes at high spin in 78Kr.:
Anukul Dhal, Rishi Kumar Sinha, Priyanka Agarwal, Suresh Kumar, Monika, BirBikram Singh, R. Kumar, P. Bringel, A. Neusser, R. Kumar, K.S. Golda, R.P. Singh, S. Muralithar, N. Madhavan, J.J. Das, A. Shukla, P.K. Raina, K.S. Thind, A.K. Sinha, I.M. Govil, P.K. Joshi, R.K. Bhowmik, A.K. Jain, S.C. Pancholi, and L. Chaturvedi, Eur. Phys.J. A 27 (2006) 33.
3. Loss of collectivity in 79Rb. :
Rishi Kumar Sinha, Anukul Dhal, Priyanka Agarwal, Suresh Kumar, Monika, BirBikram Singh, R. Kumar, P. Bringel, A. Neusser, R. Kumar, K.S. Golda, R.P. Singh, S. Muralithar, N. Madhavan, J.J. Das, K.S. Thind, A.K. Sinha, I.M. Govil, R.K. Bhowmik, J.B. Gupta, P.K. Joshi, A.K. Jain, S.C. Pancholi, and L. Chaturvedi, Eur.Phys. J. A 28, (2006) 277.
4. Decay of 246Bk * formed in similar entrance channel reactions of 11B + 235U and 14N + 232Th at low energies using the dynamical cluster-decay model.:
BirBikram Singh, Manoj K. Sharma and Raj K. Gupta, Phys. Rev. C Vol. 77, (2008) 054613.
5. 208Pb-daughter cluster radioactivity and the deformations and orientations of nuclei.:
Sham K. Arun, Raj K. Gupta, BirBikram Singh, Shefali Kanwar, Manoj K. Sharma Phys. Rev. C Vol. 79, (2009) 064616.
6. Decay of 202Pb * formed in 48Ca + 154Sm reaction using the dynamical cluster-decay model.:
Shefali Kanwar, Manoj K. Sharma, BirBikram Singh, Raj K. Gupta and Walter Greiner, Int. J. of Mod. Phys. E (Nucl. Phys.) Vol. 18, No. 7 (2009) 1453.
7. Cluster radioactivity with effects of deformations and orientations of nuclei included.:
Sham K. Arun, Raj K. Gupta, Shefali Kanwar, BirBikram Singh, Manoj K. Sharma Phys. Rev. C Vol. 80, (2009) 034317.
8. Cluster radioactive-decays within the preformed cluster model using relativistic mean field densities.:
BirBikram Singh, S K Patra and Raj K. Gupta Phys. Rev. C Vol. 82, (2010) 014607.
9. Importance of preformation probability in cluster radioactive-decays using relativistic mean field theory within the preformed cluster model.:
BirBikram Singh, S K Patra and Raj K. Gupta
Int. J. of Mod. Phys. E (Nucl. Phys.), to be published.
Contributions In International Workshop/Symposium/Conference:
10. Decay of heavier compound systems using Dynamical Cluster Decay Model.:
BirBikram Singh, Manoj K. Sharma and Raj K Gupta, International workshop on Nuclear Structure Physics at the Extremes: New Directions, H P Univ. Shimla 46 (2005).
11. Evaporation residues, fission and capture cross-sections using the dynamical cluster-decay model.:
Raj K Gupta, Manoj K. Sharma, Monika Manhas, BirBikram Singh, and Niyti Sharma , Fourth International Conference on Fission and Properties of Neutron-Rich Nuclei, Sanibel Island, Florida, November 11-17, (2007).
12. Decay of 202Pb* formed in 48Ca + 154Sm reaction using the dynamical cluster-decay model.:
Manoj K. Sharma, Shefali Kanwar, BirBikram Singh, and Raj K Gupta, International Conference on Nuclear Structure and Dynamics, Dubrovnik, May 4-8, (2009).
13. Suppression of fusion cross-sections in reactions using loosely bound projectiles.:
BirBikram Singh, S K Patra, M. Bhuyan and Raj K. Gupta, International DAE Nucl. Phys. Symp., BARC, Mumbai, Vol. 54 322, Dec., 2009..
14. Cluster radioactive-decay using relativistic mean field theory within the preformed cluster model.:
BirBikram Singh, S K Patra, M. Bhuyan and Raj K. Gupta, International DAE Nucl. Phys. Symp., BARC, Mumbai, Vol. 54 210, Dec., 2009.
15. The internal structure of 112-122Ba* nuclei using the relativistic mean field formalism.:
M. Bhuyan, S K Patra, BirBikram Singh, and Raj K. Gupta, International DAE Nucl. Phys. Symp., BARC, Mumbai, Vol. 54 180, Dec., 2009.
16. Properties of the superheavy Z=122 isotopes.:
M. Bhuyan, S K Patra, BirBikram Singh, and Raj K. Gupta, International DAE Nucl. Phys. Symp., BARC, Mumbai, Vol. 54 182, Dec., 2009.
Contributions In National Workshop/Symposium/Conference:
17. Dynamical cluster decay model for heavy ion collisions.:
BirBikram Singh, Manoj K. Sharma and Raj K Gupta, National Conference on Emerging Trends in Communication, SVIET, Patiala, February 20-21, 2009.
18. Role of higher multi-pole deformations and orientations in the 208Pb-daughter cluster radioactivity.:
BirBikram Singh, Manoj K. Sharma, Shefali Kanwar and Raj K Gupta, DAE Nucl. Phys. Symp., IIT Roorkee, Uttarakhand, 53, 261 (2008).
19. Evaporation residues, fission and quasi-fission cross-sections in the decay of 202Pb * using dynamical cluster decay model.:
Shefali Kanwar, BirBikram Singh, Manoj K. Sharma and Raj K Gupta, DAE Nucl. Phys. Symp., IIT Roorkee, Uttarakhand, 53, 497 (2008).
20. Fission and quasi-fission processes in the decay of hot and rotating compound nucleus 246Bk *.:
BirBikram Singh, Manoj K. Sharma and Raj K Gupta, 11th Punjab Science Congress, Thapar University, Patiala, February, 2008.
21. Role of deformations and orientations in the cluster decay of 242Cm nucleus.:
BirBikram Singh, Manoj K. Sharma and Raj K Gupta, 11th Punjab Science Congress, Thapar University, Patiala, February, 2008.
22. Identification of sub-structure in the fission of 246Bk * formed in 11B + 235U reaction.:
BirBikram Singh, Manoj K. Sharma, Shefali Kanwar and Raj K Gupta, DAE Nucl. Phys. Symp., Sambalpur University, Burla, Orissa , Vol. 52, 429 Dec., 2007.
23. Role of deformation and orientations in the fission decay of 246Bk *.:
BirBikram Singh and Manoj K. Sharma, National Conference on Emerging Trends in Engineering Materials, TIET, Patiala, February 1-3, 2007.
24. Decay of 48Cr * using Energy Density Formalism.:
Shefali Kanwar, BirBikram Singh and Manoj K. Sharma, National Conference on Emerging Trends in Engineering Materials, TIET, Patiala, February 1-3, 2007.
25. Dynamical Cluster Decay Model for the decay of heavy compound nucleus system.:
BirBikram Singh, Manoj K. Sharma and Raj K Gupta, 10th Punjab Science Congress, DAV Institute of Engineering and Technology, Jalandhar, February 7-9, 2007.
26. Fission cross-sections of 246Bk * formed in 14N + 232Th reaction, using dynamical cluster-decay model.:
BirBikram Singh, Manoj K. Sharma and Raj K Gupta, DAE-BRNS Nucl. Phys. Symp., MSR University of Baroda, Vadodra, Vol. 51 345, Dec., 2006.
27. Evaporation residue cross-sections in the decay of 226U* formed in 28Si + 198Pt reaction, using the dynamical cluster decay model.:
BirBikram Singh, Manoj K. Sharma and Raj K Gupta, DAE-BRNS Nucl. Phys. Symp., BARC, Bombay Vol. 50 329, Dec., 2005.
28. Role of Angular Momentum in the Decay of Hot 48Cr.:
BirBikram Singh, and Manoj K. Sharma, National conf. on Adv. in Condensed matter Physics, TIET, Patiala, Pages 38-143, (2005).
29. Shape changes at high spin in 78Kr. :
Anukul Dhal, Rishi Kumar Sinha, Priyanka Agarwal, Suresh Kumar, Monika, BirBikram Singh, R. Kumar, P. Bringel, A. Neusser, R. Kumar, K.S. Golda, R.P. Singh, S. Muralithar, N. Madhavan, J.J. Das, A. Shukla, P.K. Raina, K.S. Thind, A.K. Sinha, I.M. Govil, P.K. Joshi, R.K. Bhowmik, A.K. Jain, S.C. Pancholi, and L. Chaturvedi, DAE-BRNS Nucl. Phys. Symp., BHU, Banaras, Vol. 47B 56, Dec., 2004.
30. Decrease in collectivity at high spins in 79Rb nucleus. :
Rishi Kumar Sinha, Anukul Dhal, Priyanka Agarwal, Suresh Kumar, Monika, BirBikram Singh, R. Kumar, P. Bringel, A. Neusser, R. Kumar, K.S. Golda, R.P. Singh, S. Muralithar, N. Madhavan, J.J. Das, K.S. Thind, A.K. Sinha, I.M. Govil, R.K. Bhowmik, J.B. Gupta, P.K. Joshi, A.K. Jain, S.C. Pancholi, and L. Chaturvedi,
DAE-BRNS Nucl. Phys. Symp., BHU, Banaras, Vol. 47B 174, Dec., 2004.
31. Entrance Channel Effects using the Dynamical Cluster Decay Model: Decay of 48Cr *.:
Manoj K. Sharma, BirBikram Singh, Dalip Singh and Raj K. Gupta, DAE Nucl. Phys. Symp., BHU, Banaras, Vol. 47 B 276, Dec, 2004.
32. High spin structure in 78Kr.:
Anukul Dhal, Rishi Kumar Sinha, Priyanka Agarwal, Suresh Kumar, Monika, BirBikram Singh, R. Kumar, P. Bringel, A. Neusser, R. Kumar, K.S. Golda, R.P. Singh, S. Muralithar, N. Madhavan, J.J. Das, A. Shukla, P.K. Raina, K.S. Thind, A.K. Sinha, I.M. Govil, P.K. Joshi, R.K. Bhowmik, A.K. Jain, S.C. Pancholi, and L. Chaturvedi, DAE-BRNS Nucl. Phys. Symp., BARC, Bombay Vol. 46B 98, Dec., 2003.
33. Shape effects in 79Rb.:
Rishi Kumar Sinha, Anukul Dhal, Priyanka Agarwal, Suresh Kumar, Monika, BirBikram Singh, R. Kumar, P. Bringel, A. Neusser, R. Kumar, K.S. Golda, R.P. Singh, S. Muralithar, N. Madhavan, J.J. Das, K.S. Thind, A.K. Sinha, I.M. Govil, R.K. Bhowmik, J.B. Gupta, P.K. Joshi, A.K. Jain, S.C. Pancholi, and L. Chaturvedi,
DAE-BRNS Nucl. Phys. Symp., BARC, Bombay Vol. 46B 102, Dec., 2003.
34. Fission and Cluster Decay of 48Cr Formed in Heavy Ion Reactions.:
Manoj K. Sharma and BirBikram Singh, DAE Nucl. Phys. Symp., Bombay Vol. 46 B 270, Dec, 2003.
35. Fission decay of 48Cr at higher incident energies.:
Manoj K. Sharma and BirBikram Singh, National Conference on Materials and related Technologies, TIET, Patiala, Pages 422-427, Sep, 2003.
36. Testing of HIRA-INGA Facility at NSC.:
K. S. Golda, S. Nath, Rakesh Kumar, Akhil Jhingan, J. J. Das, S. Murlithar, R.P. Singh, R. K. Bhowmik, BirBikram Singh, R. Kumar, I. M. Govil, et al., Proc. Nuclear Physics Symposium, Vol. 45B, 448 (2002).
37. Cluster radioactive decay using relativistic mean field theory.:
BirBikram Singh, S K Patra, M. Bhuyan and Raj K. Gupta, Indian nuclear society National seminar on Nuclear Technology for Sustainable
Development, Thapar University, Patiala, Page 102, October 10-11(2009).
38. Relativistic mean field theory and internal structure of clusters in 112-122Ba* nuclei.:
M. Bhuyan, S K Patra, BirBikram Singh, and Raj K. Gupta, Indian nuclear society National seminar on Nuclear Technology for Sustainable
Development, Thapar University, Patiala, Page 103, October 10-11(2009).