
Dhruba Gupta
Associate Professor
Dhruba Gupta
Associate Professor, Physics
PhD: Saha Institute of Nuclear Physics / University of Calcutta, 2001
Previous appointments:
Postdoctoral Research Associate/CSIR Pool Officer: Variable Energy Cyclotron Centre, Kolkata, INDIA : (2006 - 2008)
Postdoctoral Research Associate/Visiting Scientist: Institut de Physique Nucleaire, IN2P3-CNRS, Universite de Paris-Sud, FRANCE : (2004 - 2006)
Postdoctoral Research Associate: University of North Carolina at Chapel Hill & Triangle Universities Nuclear Laboratory, USA : (2001 - 2004)
Research interests:
Nuclear Astrophysics
Contact:
Address: |
Department of Physics Unified Academic Campus Bose Institute EN-80, Sector V Bidhan Nagar Kolkata - 700 091, India |
E-Mail: | dhruba[at]jcbose.ac.in |
Phone: | +91-33-23031167 |
Research:
Fig. 1 and 2: Experimental setup of IS 554 at HIE-ISOLDE, CERN, Geneva, Switzerland
Fig 3: Monte Carlo simulations for the experiment
Fig 4: Resonance state wave functions of an exotic nucleus using supersymmetric quantum mechanics
I work in the area of nuclear physics involving rare isotope beams. Presently a world-wide effort is put
into pursuing rare isotope science to study nuclear structure, reactions and astrophysics. Experiments
with these new isotopes will lead to a comprehensive understanding of nuclei and the origin of the
elements in the universe. It is well known that there is a serious anomaly between the observed and
Big Bang Nucleosynthesis predicted abundance of 7Li, known as the cosmological lithium problem. I
am trying to address this issue through breakup and transfer reactions of 7Be. We would be carry-
ing out an experiment at CERN, Geneva, Switzerland, in November 2018 with me as the principal
investigator. This measurement at HIE-ISOLDE, CERN is immensely important to address the 7Li
problem, particularly in the context of the newly conjectured light electrically neutral particles X. I
also collaborated in an experiment to study n-p pairing carried out at the rare isotope beam facility GANIL, Caen, France.
To complement experimental findings on unstable/unbound nuclei, we
have developed a robust theoretical framework to study resonances. The resonance states and wave
functions of unstable/unbound nuclei were reproduced for the first time by adopting supersymmetric
quantum mechanics. The energy and width of the resonance states of the unstable 11Be and unbound
15Be nuclei obtained were in excellent agreement with experimental data. It becomes apparent that
the present framework gives excellent results and is a powerful tool to theoretically complement the
increasingly important accelerator based experiments with unbound nuclei.
Publications:
Resonance state wave functions of 15Be using supersymmetric quantum mechanics
S. K. Dutta, D. Gupta, Swapan K. Saha
Phys. Lett. B 776, 464 (2018)
Study of resonance states of 11Be with isospectral bound state microscopic potential
S. K. Dutta, D. Gupta, D. Das and Swapan K. Saha
Jour. Phys. G: Nucl. Part. Phys. 41, 095104 (2014)
Deformation in 28Si* produced via 16O + 12C reaction
S. Kundu, C. Bhattacharya, S. Bhattacharya, T. K. Rana, K. Banerjee, S. Muhkopadhayay, D. Gupta, A. Dey, and R. Saha
Phys. Rev. C 87, 024602 (2013)
Study of the 1p transfer channel in the 12C + 27Al reaction at 6–7 MeV per nucleon
A. Dey, S Kundu, T K Rana, K Banerjee, C Bhattacharya, M Biswas, T K Ghosh, H Pai, G Mukherjee, J K Meena, D. Gupta, S Bhattacharya, S Mukhopadhyay, D Pandit, S R Banerjee, S. Kumar, A Chatterjee, K Ramachandran, K Mahata, S Santra and S Pandit
Phys. Scr. T150, 014011 (2012)
Onset of deformation at N = 112 in Bi nuclei
H. Pai, G. Mukherjee, R. Raut, S. K. Basu, A. Goswami, S. Chanda, T. Bhattacharjee, S. Bhattacharyya, C. Bhattacharya, S. Bhattacharya, S. R. Banerjee, S. Kundu, K. Banerjee, A. Dey, T. K. Rana, J. K. Meena, D. Gupta, S. Mukhopadhyay, Srijit Bhattacharya, Sudeb Bhattacharya, S. Ganguly, R. Kshetri, and M. K. Pradhan
Phys. Rev. C 85, 064317 (2012)
Complex-fragment emission in low-energy light-ion reactions
S. Kundu, C. Bhattacharya, K. Banerjee, T. K. Rana, S. Bhattacharya, A. Dey, T. K. Ghosh, G. Mukherjee, J. K. Meena, P. Mali, S. Mukhopadhyay, D. Pandit, H. Pai, S. R. Banerjee, D. Gupta, P. Banerjee, Suresh Kumar, A. Shrivastava, A. Chatterjee, K. Ramachandran, K. Mahata, S.K. Pandit, and S. Santra
Phys. Rev. C 85, 064607 (2012)
Recognition:
Teaching:
1) Methods in Physics - PhD coursework of Bose Institute (2014 - present)
2) Nuclear Physics - Int. M.Sc-Ph.D coursework of Bose Institute and Univ. of Calcutta (2014 - present)
3) Nuclear Physics, Advanced Experiments I - M. Sc. coursework of St. Xavier's College and Bose Institute (2008 - 2014)
Students:
Image | Name | Designation | Department | Campus | Contact number | |
---|---|---|---|---|---|---|
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Mustak Ali | Senior Research Fellow | Physics | Unified | 23031167 | mustak |
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Sahanaj Aktar Banu | Junior Research Fellow | Physics | Main | 23031167 | sahanaj |
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Subhankar Maity | Junior Research Fellow | Physics | Main | 23031167 | subhankar |
Former:
Dr. Mandira Sinha, Research Associate
Ms. Kabita Kundalia, Research Scholar
Mr. Mustak Ali, Research Scholar
Mr. Subhankar Maity, Research Scholar
Ms. Sahanaj Aktar Banu, Research Scholar
Group News:
Recent significant work with relevant publications:
Search for higher excited states of 8Be* to study the cosmological 7Li problem:
Serious discrepancy in primordial abundance of 7Li exists between observation and Big Bang
Nucleosynthesis prediction using ηbWMAP in contrast to abundances of 2H,3,4He. This remains as
one of the important unresolved problems. HIE-ISOLDE facility at CERN, Geneva, Switzerland gives unique opportunity to test it with higher 7Be beam energy and intensity. Experiment proposed by us will be done at CERN-HIE-ISOLDE. This is the first Indian project approved (IS 554) at HIE-ISOLDE. Detailed Geant4 simulations are underway.
D. Gupta, S. K. Saha, CERN ISOLDE workshop (2013, 2014, 2015, 2016)
Study of n-p pairing through two-nucleon transfer reactions: To understand n-p pairing
correlations we collaborated in an experiment at GANIL, Caen, France involving n-p transfer reactions on two nuclei: 48Cr, which is a candidate for n‐p pairing correlations, and the doubly magic nucleus 56Ni which will not show any pairing effects. This will also help to understand the appearance of new magic numbers 6 and 14 far from stability. Data analysis is in progress.
Study of resonance states of exotic nuclei: We generated an isospectral potential starting from the DDM3Y effective interaction to study quasi bound states of exotic nuclei for the first time. This resulted in an accurate determination of energy and width of resonance states.
S K Dutta, D. Gupta, D. Das, S. K. Saha, Jour. Phys. G: Nucl. Part. Phys. 41, 095104 (2014)