Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/24506
Title: GEANT4 simulation of a new 4π sum-spin spectrometer at TIFR
Authors: Anil Kumar, G.
Mazumdar I.
Gothe D.A.
Published in: IEEE Nuclear Science Symposium Conference Record
2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
Abstract: A 4π sum-spin spectrometer has been designed, constructed and commissioned at the Tata Institute of Fundamental Research (TIFR), Mumbai. The spectrometer is an array of 32 conical Nal detectors of pentagonal and hexagonal cross sections. The primary role of the array is to measure the multiplicity and sum-energy of the discrete low energy gamma rays emitted in heavy-ion induced fusion-evaporation reactions. The determination of the multiplicity and sum-energy of the low energy discrete gamma rays from evaporation residues is crucial for angular momentum gating or selection of narrow angular momentum windows in the phase space. This spectrometer is primarily to be used in conjunction with a high energy gamma ray spectrometer for detection of phase space selected Giant Dipole Resonance (GDR) gamma rays. Since its commissioning the array has been successfully used in in-beam experiments to study GDR decay from hot-rotating 192Pt nucleus. We have carried out extensive simulations for calculating the detection efficiencies of the individual detectors and the entire array including the scattering chamber. The total intrinsic and photo peak efficiencies have been measured accurately with calibrated low energy gamma ray sources and are found to be in very good agreement with the values obtained from GEANT4 simulations. We have also carried out efficiency measurements and GEANT4 simulations for a smaller array of 14 straight Nal detectors of hexagonal cross sections packed in castle geometry and the results have been compared with the 4π array. The fold distributions have also been calculated for different gamma multiplicities for both the 14 elements and the 4π array. The detailed results of the simulations and measurements for the 4π array and the results of the comparative studies with the 14 elements array in castle geometry are presented. © 2008 IEEE.
Citation: IEEE Nuclear Science Symposium Conference Record (2008): 1640-1642
URI: https://doi.org/10.1109/NSSMIC.2008.4774717
http://repository.iitr.ac.in/handle/123456789/24506
Issue Date: 2008
Keywords: Comparative studies
Detection efficiency
Efficiency measurement
Extensive simulations
Fundamental research
GEANT4 simulation
Giant Dipole Resonances
Heavy-ion induced fusion
Hexagonal cross-sections
High energy
Low energies
Low energy gamma ray
Phase spaces
Photo peaks
Scattering chambers
Simulations and measurements
Angular momentum
Detectors
Electromagnetic waves
Evaporation
Phase space methods
Platinum
Spectrometers
Spectrometry
Spin dynamics
Stars
Vapors
X ray cameras
Gamma rays
ISBN: 9.78142E+12
ISSN: 10957863
Author Scopus IDs: 6507200270
55885084200
8689368300
Author Affiliations: Kumar, G.A., Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400005, India
Mazumdar, I., Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400005, India
Gothe, D.A., Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400005, India
Corresponding Author: Kumar, G. A.; Department of Nuclear and Atomic Physics, Homi Bhabha Road, Colaba, Mumbai-400005, India; email: anilg@tifr.res.in
Appears in Collections:Conference Publications [PH]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.