Ayush Priyadarshi
I am an Integrated BS–MS Physics student at the Indian Institute of Technology Roorkee, working at the intersection of computational physics, scientific software development, detector simulations, and research instrumentation.
My current research develops angle-resolved annihilation-photon correlation factors for coincidence-summing corrections in high-efficiency NaI(Tl) detectors. I work across analytical modelling, Geant4 simulation, ROOT-based analysis, gamma-ray spectroscopy, and reproducible scientific software.
Research Focus
Annular-Detector Angular Factors
I led an annular NaI(Tl) detector study that establishes the angular factors required before applying our correction formalism to a more complex near-4π array. I corrected and extended an earlier unpublished derivation, performed the angle-resolved Geant4 analysis, developed the public reproducibility package, validated the calculation, prepared the figures, and wrote the complete manuscript.
The conference paper was submitted to the DAE Symposium on Nuclear Physics 2026 on 8 September 2026. I am its first and corresponding author.
View the reproducibility package
Coincidence-Summing Corrections for β⁺ Emitters
I am working with Prof. Anil Kumar Gourishetty on geometry-dependent corrections for coincidence summing in Na-22, O-14, and Sc-44. I extended my thesis software to model custom decay sources, reconstruct a published eight-block reference detector, run high-statistics campaigns, and calculate the angular factors required for a near-4π soccer-ball NaI(Tl) detector array.
The implementation was checked by reproducing published reference factors within 2.3%, and the soccer-ball detector model was benchmarked against published experimental measurements for the physical TIFR array. A peer-reviewed journal manuscript is planned, with confirmed second authorship.
Master’s Thesis and Continuing Research Platform
My master’s thesis developed a Python-assisted Geant4 workflow for automated scintillation detector response simulations. The workflow integrates:
- Geant4 C++ detector simulation backend
- Python-based macro generation
- Automated campaign execution
- ROOT-file validation
- Deposited-energy spectrum generation
- Peak-count and total-count extraction
- CSV/table generation
- Reproducible output organisation
This work forms the software basis of my master’s thesis, a first-author conference paper accepted for poster presentation at IEEE Nuclear Science Symposium 2026, and my current detector-physics research.
Featured Software
Angular Factors Calculator
A tested Python package and command-line tool for calculating annular-detector annihilation-photon correlation factors from angle-resolved ROOT data or supplied mass coefficients.
Geant4 Detector Simulation Pipeline
A Python-assisted Geant4 simulation pipeline for automated scintillation detector response studies.
The project supports solid cylindrical, hollow annular, and near-4π soccer-ball detector geometries, along with scintillator materials such as NaI, LaBr3, CsI, BGO, GGAG, and PbWO4.
Selected Projects
Radio Telescope Control and Embedded Linux Support
Contributed to Raspberry Pi-based embedded Linux and hardware-control support for a student-led radio telescope project under the Physics and Astronomy Club, IIT Roorkee.
WiFi IP Mouse
Built a Raspberry Pi-based WiFi IP mouse system during the Syntax Error Hackathon organised by SDS Labs, IIT Roorkee. Awarded First Prize.
Raspberry Pi Home Server
Designed and maintain a Raspberry Pi-based home server for self-hosted services, home automation, file sharing, DNS filtering, reverse proxy services, and network gateway functionality.
Publications
A. Priyadarshi, R. Chauhan, A. Srivastava, and G. Anil Kumar,
“Angle-resolved annihilation-photon correlation factors for an annular NaI(Tl) detector,”
submitted to the DAE Symposium on Nuclear Physics, 2026. Submission date: 8 September 2026.
Role: First and corresponding author.
A. Priyadarshi, G. A. Kumar, K. Madhan, and V. Ranga,
“A Python-based Tool for Automated Geant4 Simulations of Scintillation Detectors,”
accepted for poster presentation at IEEE Nuclear Science Symposium, 2026.
Status: Accepted for poster presentation.
Quick Links
Contact
Email: a_priyadarshi@ph.iitr.ac.in
GitHub: github.com/ayushpriyadarshi-18