Sangeeta Das

ORCID: 0009-0003-0256-8644
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Nuclear physics research studies
  • Atomic and Molecular Physics
  • Nuclear Physics and Applications
  • Radiation Detection and Scintillator Technologies
  • Astronomical and nuclear sciences
  • Advanced Chemical Physics Studies
  • Magnetism in coordination complexes
  • Radioactive element chemistry and processing
  • Chemical Synthesis and Analysis
  • Supramolecular Self-Assembly in Materials
  • Nuclear Materials and Properties
  • Chemical Synthesis and Characterization
  • Inorganic Chemistry and Materials
  • Particle Detector Development and Performance
  • Quantum Chromodynamics and Particle Interactions
  • Rare-earth and actinide compounds
  • Nuclear reactor physics and engineering
  • X-ray Spectroscopy and Fluorescence Analysis
  • High-Energy Particle Collisions Research
  • CCD and CMOS Imaging Sensors
  • Lanthanide and Transition Metal Complexes
  • Inorganic Fluorides and Related Compounds
  • Advanced Frequency and Time Standards
  • Fusion materials and technologies
  • Protein Structure and Dynamics

Indian Association for the Cultivation of Science
2024-2025

Institute of Engineering Science
2025

Indian Institute of Engineering Science and Technology, Shibpur
2023-2024

Saha Institute of Nuclear Physics
1985-2023

UGC DAE Consortium for Scientific Research
2016-2021

Visva-Bharati University
2020

UGC-DAE Consortium for Scientific Research, Kolkata Centre
2016-2018

Bhabha Atomic Research Centre
1999

Argonne National Laboratory
1978

Computational modelling of self-assembly mechanisms is a promising way to establish chemically meaningful relationships between molecular structures the building blocks and final outcomes spontaneous assemblies. However, such connections are not immediately apparent, due presence complex interplay involving multitude intermolecular interactions with complicated temporal variations. In this paper, we propose method called analysis multidimensional chemical interaction space (TAMCIS), which...

10.1039/d4cp04597a article EN Physical Chemistry Chemical Physics 2025-01-01

Complex pathways in spontaneous molecular assemblies have been envisaged to be crucial factors determining diverse outcomes desirable for materials design. Computer simulations can instrumental elucidating early stages of the assembly process, where direct experimental observations are difficult obtain. In this paper, we report a computational study on pathway complexities aqueous mixtures hydrophobic tripeptides that self-assemble into amorphous nanoscale objects. We introduce new...

10.1063/5.0261115 article EN The Journal of Chemical Physics 2025-05-19

Large-basis shell-model calculations have been performed to investigate the excited states of 131,132 Sn using a newly formulated cross-shell interaction. Recent expansions level schemes has provided valuable structural insights. A detailed comparison excitation energies and electromagnetic transition rates between experimental data theoretical predictions offers deep understanding these nuclei. While certain transitions align well with data, others show discrepancies. This observed...

10.1051/epjconf/202532501008 article EN cc-by EPJ Web of Conferences 2025-01-01

Computational modeling of self-assembly mechanisms is a promising way to establish chemically meaningful relationships between molecular structures the building blocks and final outcomes spontaneous assemblies. However, such connections are not immediately apparent, due presence complex interplay involving multitude intermolecular interactions with complicated temporal variations. In this paper, we propose method, called Temporal Analysis Multidimensional Chemical Interaction Space (TAMCIS),...

10.26434/chemrxiv-2024-0cgwn preprint EN cc-by-nc-nd 2024-11-25

Relative isotopic yield distributions have been extracted for nine correlated fission fragment pairs following a detailed analysis of prompt γ−γ coincidence events from 232Th(α,f) reaction at Elab = 30 MeV. Simultaneously, the charge and mass even-even fragments obtained measured relative yields. The onset triple-hump structure is seen in as well fragments. results are consistent with two-mode hypothesis compound nucleus good agreement theoretical predictions, based on relevant models....

10.1016/j.physletb.2021.136848 article EN cc-by Physics Letters B 2021-12-29

This paper reports on an investigation the level structure of odd-mass $^{29}\mathrm{Al}$ nucleus populated via heavy-ion induced fusion evaporation reaction. Rotational sequences with fast magnetic dipole transitions have been identified. These exhibit essential characteristic features magnetic-rotation-like behavior, which has corroborated through lifetime measurements using Doppler shift attenuation method. The also show exhibited by axially deformed nuclei. Thus, presents possibility...

10.1103/physrevc.98.014330 article EN publisher-specific-oa Physical review. C 2018-07-31

The yrast and nonyrast level structure of the odd-odd 78As nucleus has been investigated using standard γ ray spectroscopic techniques. excited states were populated through 76Ge(α,pn) fusion evaporation reaction at incident beam energies 30, 35, 40 MeV. deexciting gamma rays detected with Indian National Gamma Array spectrometer composed Clover low-energy photon detectors. In addition to extension previously known positive-parity band up Ex ≈ 2.7 MeV J=11ℏ, an dipole band-like based on...

10.1103/physrevc.102.064311 article EN Physical review. C 2020-12-14

High-spin positive parity states of $^{50}\mathrm{V}$, populated through the $^{48}\mathrm{Ti}(^{4}\mathrm{He},np)^{50}\mathrm{V}$ reaction with a 48 MeV $\ensuremath{\alpha}$ beam, have been studied using Indian National Gamma Array (INGA) facility. A few new levels and $\ensuremath{\gamma}$-ray transitions added to level scheme utilizing results intensity, directional correlation, linear polarization measurements. Lifetimes excited measured for first time Doppler shift attenuation method...

10.1103/physrevc.109.054328 article EN Physical review. C 2024-05-30

Molecular self-assembly has garnered significant attention in the field of biomaterials and nanotechnology due its potential for creating novel materials with diverse applications. The entire process is guided by either classical nucleation growth or formation multiple nucleus their finally fusion self- assembled states. Systematic way to track this nucleation, still unknown. We have developed an algorithm systematically identify all possible molecular events. events provide immediate...

10.26434/chemrxiv-2024-zk9qv preprint EN cc-by-nc-nd 2024-02-23

Lifetimes of a few negative parity levels and multipole mixing ratios ($\ensuremath{\delta}$) for dipole transitions in $^{49}\mathrm{V}$, populated through the $^{48}\mathrm{Ti}(^{4}\mathrm{He},2np)^{49}\mathrm{V}$ reaction with 48 MeV $^{4}\mathrm{He}$ beam, were measured. The Indian National Gamma Array (INGA) facility was used to detect $\ensuremath{\gamma}$ rays at three different angles. Large basis shell model calculations performed understand microscopic origin these interpret...

10.1103/physrevc.105.044304 article EN Physical review. C 2022-04-07

Measurement of level lifetime nuclear states is relevance in structure research as it provides us with an unique probe into the underlying microscopic these states. Of several experimental techniques for measurements, Doppler Shift Attenuation Method (DSAM) one adopted measuring lifetimes typically range few tens fs to ps. The technique based on analysis observed affected gamma rays emitted by recoils flight. crucial component related simulation stopping process, residues interest, target...

10.1088/1742-6596/755/1/012004 article EN Journal of Physics Conference Series 2016-10-01

Results of 57Fe Mossbauer investigation in a layered cyanide Mg(Mg((CH2)6N4)2Fe(CN)6)2.nH2O for different stages hydration are presented. spectra the partially hydrated show an asymmetry intensity two absorption peaks quadrupolar doublet. The powder pattern has been analysed terms superposition asymmetric doublets arising from inequivalent sites. An explanation doublet spectrum suggested Goldanskii-Karyagin effect.

10.1088/0953-8984/2/34/014 article EN Journal of Physics Condensed Matter 1990-08-27
Coming Soon ...