Subhendu Rajbanshi
Assistant Professor
About-
My research work evolved to investigate the extreme excitation mechanism for the generation of angular momentum states in weakly deformed nuclei near the shell closure using the γ - ray spectroscopic techniques at different accelerator centres with the state of art large gamma detectors arrays. Lifetime measurement of the excited states of interest plays one of the key roles of the investigation. Different techniques, such as Doppler Shift Attenuation Method (DSAM), have been applied to measure the precise level lifetime.
Presently, I am working on the phase transitional behaviour of the atomic nuclei along with the different aspect of the symmetry breaking phenomenon of the rapidly rotating nuclei, such as Chiral Symmetry Breaking, Wobbling Motion and Shape Coexistence etc.
Qualifications+
B. Sc [Physics] (University of Kalyani, 2008)
M. Sc [Physics] (University of Kalyani, 2010)
Post. M. Sc [Physics] (Saha Institute of Nuclear Physics, 2011)
Ph. D. [Experimental Nuclear Physics] (Saha Institute of Nuclear Physics / University of Calcutta, 2016)
Biography+
Research / Administrative Experience+
A. Research Expertise :
I. Measurement of the sub-picosecond level lifetimes through the Doppler Shift Attenuation Method (DSAM) and extraction of the level lifetimes from LINESHAPE analysis to the experimental spectrum of the DSAM technique.
II. Experience on beam-line setting, setting up the electronics and data acquisition at different accelerator centre's (VECC, Kolkata and TIFR, Mumbai) for both Nuclear Structure and Reaction studies.
III. Analysis of experimental data by the RADWARE, INGASORT, DAMM and LINESHAPE software packages and subsequent interpretation of the experimental results with the help of the different theoretical models (calculations) viz. shell model (NushellX), shears model, shears mechanism with the principal axis cranking (SPAC) model and total routhian surface (TRS) calculations.
B. Technical and Software skills
## Coincidence measurements :
Directional angular Correlation of gamma rays from Oriented nuclei (DCO ratio)
Polarization Measurements
II. Measurement of the sub picosecond level lifetime using Doppler Shift Attenuation Method with the help of the LINESHAPE software package. Details study about the analysis procedures and also about the LINESHAPE software package
III. Lifetime measurement from time stamped decay data
## Nuclear Models :
Shell Model calculations (NushellX)
Shears Model
SPAC (the shears mechanism with the principal axis cranking) model
HSPAC model (hybrid SPAC model)
TRS (Total routhian surface) calculations
QTR (quasiparticle plus triaxial rotor) calculations
## Programming languages: C, C++, Python and root
## Mathematical packages: Origin, Matlab, Mathematica, GEANT4, Qtplot and Gnuplot
## Other: Linux (Fedora, Ubuntu and Scientific Linux), Windows OS
Teaching / Other Experience+
Assistant Professor, Presidency University [August 2018 - Present]
Jan - May 2020 (even semester):
1. UG:
a. Optics Lab (B.Sc. Semester-2)
b. Nuclear and Particle Physics (B.Sc. Semester-6)
Useful Notes:
Document1: https://drive.google.com/open?id=1ocYI2kgxU-NNeH0A9I_RXdR5ZFZp6r2_
Document2: https://drive.google.com/open?id=1VTIFK2AyB9vFN-mXtmyqRjFdNbGXdojS
Document3: https://drive.google.com/open?id=1Osy5R6bXEeGoENSnsy_nALvpCs2IG3Fl
Document4: https://drive.google.com/open?id=1ThJyLbrzkbHKsdas4lUWghBJ27NySo0P
Assignments:
Set1:
https://drive.google.com/open?id=1wRT9KVxVQc2acm_xNhE7Wmmjd1usfIZP
Set2:
https://drive.google.com/open?id=1GD-TNerP0dyTCIPWoVf16OqwFdBKnmxx
2018 - 2019 :
- Mathematical Physics [B. Sc. Sem III]
- LAB [M. Sc Sem I]
Assistant Professor, Dum Dum Motijheel College [March 2015 - August 2018]
Post Graduate Supervision+
Academic Memberships+
Life-time member of the Indian Physical Society
Publications+
Full list of publications :
Please see https://scholar.google.co.in/citations?user=QzEq03kAAAAJ&hl=en
a) In Peer-Reviewed International Journal
S. Rajbanshi in A. K. Mondal et al. (2020), Investigation of different possible excitation modes in neutron-rich 78As: Physical Review C 102 (6), 064311 (2020).
S. Rajbanshi in S. Nandi et al. (2020), First Observation of Multiple Transverse Wobbling Bands of Different Kinds in 183Au: Physical Review Letters 125 (13), 132501 (2020).
S. Rajbanshi in Rajkumar Santra et al (2020), Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn (n, γ) 69Zn capture cross-section: Physics Letters B 806, 135487 (2020).
S. Rajbanshi in Prithwijita Ray et al (2020): Quasi-gamma band in 114Te: Physical Review C 101 (6), 064313.
S. Rajbanshi in R. Banik et al (2020): Exploring the structure of Xe isotopes in A ~ 130 region: Single-particle and collective excitations: EPJ Web of Conferences 232, 04001.
S. Rajbanshi in R. Banik et al (2020): Revealing multiple band structures in 131Xe from the α-induced reaction: Physical Review C 101 (4), 044306.
F. S. Babra, R. Palit, S. Rajbanshi et al (2019): Investigation of a large change in deformation for the γ-soft nucleus 136Sm: Physical Review C 100, 054308 (2019).
S. Ali, S. Rajbanshi et al. (2019): Evidence of the octupole correlation between the shears bands in 142Eu: Physics letters B 798, 134960 (2019).
- S. Rajbanshi in S. Bhattacharya et al. (2019) : Evolution of collectivity and evidence of octupole correlations in 73Br : Physical Review C 100, 014315 (2019).
- H. Pai, Sajad Ali, S. Rajbanshi et al. (2019): 112Sn Target: Fabrication, Characterization and Application: Vacuum 167 (2019) 393 - 396.
- S. Rajbanshi in S. Nandi et al. (2019): Effect of neutron alignment on the structure of 197Tl: Physical Review C 99, 054312 (2019).
- S. Rajbanshi in A. Saha et al. (2019): Spectroscopy of a tetrahedral doubly magic candidate nucleus 160Yb: Journal of Physics G: Nuclear and Particle Physics 46 (2019) 055102.
- S. Rajbanshi et al. (2018): Extremely asymmetric shears band in 143Sm : PHYSICAL REVIEW C (rapid communication) 98, 061304 (2018).
- S. Rajbanshi et al. (2018): Abrupt phase change of the core rotation in 143Sm : Physics Letters B 782, 143 - 148 (2018).
- S. Rajbanshi in A. Saha et al. (2018) Excited negative parity bands in 160Yb: Phys. Scr. 93 (2018) 034001 (6pp).
- S. Ali, S. Rajbanshi et al. (2017): Evidence of antimagnetic rotation in an odd-odd nucleus: The case of 142Eu : PHYSICAL REVIEW C 96, 021304(R) (2017).
- S. Rajbanshi in S. S. Bhattacharjee et al. (2017): Shape evolution with increasing angular momentum in the 66Ga nucleus: PHYSICAL REVIEW C 95, 054330 (2017).
- S. Rajbanshi in B. Das et al. (2017): Novel evolution of the positive parity shears band in 106Ag : PHYSICAL REVIEW C 95, 051301 (R) (2017).
- S. Rajbanshi et al. (2016): Shears mechanism and development of collectivity in 141Sm: PHYSICAL REVIEW C 94, 044318 (2016).
- S. Rajbanshi in B. Das et al. (2016) : Three proton hole structure in 106Ag : PHYSICAL REVIEW C 93, 064322 (2016).
- S. Rajbanshi in Md. Moin Shaikh et al. (2016) : Probing the fusion of 7Li with 64Ni at near-barrier energies : PHYSICAL REVIEW C 93, 044616 (2016).
- S. Rajbanshi et al (2015) : Antimagnetic rotation and sudden change of electric quadrupole transition strength in 143Eu : Physics Letters B 748, 387 - 391 (2015)
- S. Rajbanshi in Md. Moin Shaikh et al. (2015) : Barrier distribution functions for the system 6Li + 64Ni and the effect of channel coupling: PHYSICAL REVIEW C 91, 034615 (2015).
- S. Rajbanshi et al. (2014) : Multiple magnetic rotational bands based on proton alignment in 143Eu : PHYSICAL REVIEW C 90, 024318 (2014).
- S. Rajbanshi in Md. Moin Shaikh et al. (2014) : Investigation of 6Li + 64Ni fusion at near barrier energies: PHYSICAL REVIEW C 90, 024615 (2014)
- S. Rajbanshi et al. (2014): Shape coexistence in the near-spherical 142Sm nucleus: PHYSICAL REVIEW C 89, 014315 (2014).
- S. Rajbanshi in N. Rather et al. (2014): Exploring the Origin of Nearly Degenerate Doublet Bands in 106Ag: PHYSICAL REVIEW LETTERS 112, 202503 (2014).
- S. Rajbanshi in H. Pai et al. (2013) : Band structures and intruder πi13/2 state in 197Tl: PHYSICAL REVIEW C 88, 064302 (2013).
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b) In Conference/Symposium (From 2018 and onwards)
23. S. Rajbanshi in S Nandi et al, Nuclear structure near N = 108 deformed shell gap: a case of 187Os : Proceedings of the DAE Symp. on Nucl. Phys. 63, 114 (2018).
24. S. Rajbanshi in Prithwijita Ray et al, Search for γ-band.in 114Te: Proceedings of the DAE Symp. on Nucl. Phys. 63, 260 (2018).
25. S. Rajbanshi in Prithwijita Ray et al, Observation of non-yrast states in 116Sn and.. measurement of polarisation asymmetry : Proceedings of the DAE Symp. on Nucl. Phys. 63, 278 (2018).
26. S. Rajbanshi in Sajad Ali et al, Deexcitation of three particle - three-hole structure in 142Eu : Proceedings of the DAE Symp. on Nucl. Phys. 63, 210 (2018).
27. S. Rajbanshi in S Chatterjee et al, Digital Pulse Processing and.. DAQ System for INGA at VECC: Proceedings of the DAE Symp. on Nucl. Phys. 63, 1100 (2018).
28. S. Rajbanshi in FS Babra et al, Shape evolution in 136Sm: Proceedings of the DAE Symp. on Nucl. Phys. 63, 306 (2018).
29. S. Rajbanshi in Rajkumar Santra et al, Investigation of structural evolution in 70Ge: Proceedings of the DAE Symp. on Nucl. Phys. 63, 350 (2018).
30. S. Rajbanshi in Sutanu Bhattacharya et al, Search for octupole correlation in 73Br : Proceedings of the DAE Symp. on Nucl. Phys. 63, 318 (2018).
31. S. Rajbanshi in Ranabir Banik et al, Gamma-γ-ray spectroscopy of 131Xe from the alpha-induced reaction : Proceedings of the DAE Symp. on Nucl. Phys. 63, 82 (2018).
32. S. Rajbanshi in D Pramanik et al, High spin gamma-ray spectroscopy study of 154Ho: Proceedings of the DAE Symp. on Nucl. Phys. 63, 314 (2018).
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