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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14524
Title: Temperature dependence of the giant dipole resonance width in Gd 152
Authors: Ghosh C.
Mishra G.
Rhine Kumar A.K.
Dokania N.
Nanal V.
Pillay R.G.
Kumar S.
Rout P.C.
Joshi S.
Arumugam, Paramasivan
Published in: Physical Review C
Abstract: To investigate the dependence of giant dipole resonance (GDR) width on temperature (T) and angular momentum (J), high energy γ-ray spectra were measured in the reaction Si28+Sn124 at ESi28=135 MeV. The J information was deduced from multiplicity of low-energy γ rays. The GDR parameters, namely, the centroid energy and width are extracted using statistical model analysis. The observed variation of the GDR width for T∼1.2-1.37 MeV and J∼20-40 is consistent with the universal scaling given by Kusnezov et al., which is applicable in the liquid-drop regime. The GDR input cross sections extracted from the statistical model best fits are compared with thermal shape fluctuation model (TSFM) calculations and are found to be in good agreement. The TSFM calculations predominantly favor the noncollective oblate shape, while the statistical model fit with both prolate and oblate shapes describes the data. The present data together with earlier measurements indicate a very slow variation of the GDR width for T∼1.2 to 1.5 MeV. The observed trend is well explained by the TSFM calculations, although the calculated values are ∼4%-13% higher than the data. © 2016 American Physical Society.
Citation: Physical Review C (2016), 94(1): -
URI: https://doi.org/10.1103/PhysRevC.94.014318
http://repository.iitr.ac.in/handle/123456789/14524
Issue Date: 2016
Publisher: American Physical Society
ISSN: 24699985
Author Scopus IDs: 56435652900
42062134300
55670840500
54885277900
55887821200
25638736100
57206762576
24339612600
57190381135
16068034900
Author Affiliations: Ghosh, C., Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai, 400005, India
Mishra, G., Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
Rhine Kumar, A.K., Department of Nuclear and
Funding Details: P.A. acknowledges the financial support from the Science and Engineering Research Board (India), SR/FTP/PS-086/2011 and DST/INT/POL/P-09/2014.
Appears in Collections:Journal Publications [PH]

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