Spin gated GDR widths at moderate temperatures
1 Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, India
2 Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
3 Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, India
4 Department of Physics, Panjab University, Chandigarh, India
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Published online: 29 January 2015
We present the evolution of giant dipole resonance (GDR) width as a function of angular momentum in the compound nucleus 144Sm in the temperature range of 1.5-2.0 MeV. The high energy γ rays emitted from the decay of excited 144Sm were measured using large NaI detector in coincidence with 4π sum spin spectrometer. GDR widths were found to comply with thermal shape fluctuation model in this temperature range over a wide range of spin. Experimental widths tend to increase rapidly at high angular momentum values.
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