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Title: Decoupling the effect of temperature on GDR widths in excited compound nucleus 144Sm
Authors: Mukul I.
Roy A.
Sugathan P.
Gehlot J.
Mohanto G.
Nath S.
Madhavan N.
Dubey R.
Banerjee T.
Saneesh N.
Mazumdar I.
Gothe A.
Rhine Kumar A.K.
Arumugam, Paramasivan
Kaur M.
Published in: Journal of Physics G: Nuclear and Particle Physics
Abstract: We measured giant dipole resonance (GDR) γ-rays in the 28Si + 116Cd reaction at ∼105 and 120 MeV excitation energies. The resonance widths were extracted as a function of temperature at different angular momentum values to decouple the effect of these two variables on resonance widths. The high energy GDR γ-rays from the decay of compound nucleus (CN) 144Sm were measured using a large NaI(Tl) detector in coincidence with a sum-spin multiplicity filter. The experimental data were analyzed under the framework of statistical decay of CN. The GDR cross sections were also calculated with a thermal shape fluctuation model (TSFM), which incorporates the temperature and spin dependent shell corrections within the Nilsson-Strutinsky approach. The GDR widths were extracted in the temperature range 1.5-2.2 MeV. The measured widths indicate that the increase of GDR widths with temperature at different average spin values follows a similar trend and is borne out by theoretical calculations. Present calculation shows that TSFM satisfactorily reproduces the GDR cross section as well as widths in the temperature range 1-2.2 MeV over a wide range of angular momentum. © 2014 IOP Publishing Ltd.
Citation: Journal of Physics G: Nuclear and Particle Physics (2014), 41(11): -
Issue Date: 2014
Publisher: Institute of Physics Publishing
Keywords: CASCADE calculations
Deduced gamma-ray multiplicity
GDR gamma rays
GDR width
Potential energy surfaces
Thermal shape fluctuation model
ISSN: 9543899
Author Scopus IDs: 55327298600
Author Affiliations: Mukul, I., Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110067, India
Roy, A., Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110067, India, Variable Energy Cyclotron Centre, Kolkata, 700064, India
Corresponding Author: Mukul, I.; Inter University Accelerator Centre, Aruna Asaf Ali Marg, India
Appears in Collections:Journal Publications [PH]

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