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SUMMARY:Position-Sensitive Gamma-Ray Detection for Nuclear Reaction Studie
 s
DTSTART:20260901T053000Z
DTEND:20260901T073000Z
DTSTAMP:20260917T111800Z
UID:indico-event-9427@scitalks.tifr.res.in
DESCRIPTION:Speakers: Katyani Tiwari (Position-Sensitive Gamma-Ray Detecti
 on for Nuclear Reaction Studies.)\n\nNuclear reactions provide a powerful 
 tool for investigating the structure and dynamics of atomic nuclei. High-r
 esolution γ-ray spectroscopy of the reaction products provides essential 
 information on their excited-state structure and electromagnetic propertie
 s. A particular experimental challenge arises when the nuclei produced in 
 these reactions are moving with substantial velocities. The γ-rays emitte
 d from the moving nuclei undergo a Doppler shift\, and the measured energy
  therefore depends on the angle at which the γ-ray is emitted relative to
  the direction of motion of the nucleus. Accurate determination of this an
 gle is consequently essential for Doppler correction and for resolving clo
 sely spaced nuclear levels. This has motivated the development of highly s
 egmented and γ-ray tracking detector arrays\, such as GRETINA and AGATA\,
  where the interaction points of γ-rays are reconstructed to determine th
 eir trajectories. In particular\, the position of the first interaction po
 int has a strong influence on the Doppler-correction capability of the det
 ector. The development of such tracking detectors places stringent require
 ments on the determination of γ-ray interaction positions. At the same ti
 me\, increasing detector granularity leads to a large number of readout ch
 annels and greater electronic and data-acquisition complexity. This raise
 s the question of whether precise γ-ray interaction positions can be obta
 ined using a compact detector architecture while keeping the readout compl
 exity manageable. Position reconstruction from the SiPM response has been 
 investigated using conventional signal-processing techniques as well as ma
 chine-learning-based approaches. The developed detector demonstrates appro
 ximately millimetre-scale spatial localization and provides a compact appr
 oach to position-sensitive γ-ray detection. This work explores the potent
 ial of combining monolithic scintillators\, sparse SiPM readout\, and adva
 nced position-reconstruction methods to obtain precise spatial information
  with reduced readout complexity. The developed detector can serve as a to
 ol for localized response mapping and calibration of segmented γ-ray dete
 ctor systems\, and may find applications in future nuclear-reaction experi
 ments\, such as those planned with tracking arrays like AGATA and GRETINA\
 , where accurate γ-ray interaction-position information is essential for 
 improving the reconstruction of reaction observables.\n\nhttps://scitalks.
 tifr.res.in/event/9427/
LOCATION:AG 66 (TIFRm Mumbai )
URL:https://scitalks.tifr.res.in/event/9427/
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