Coherent bremsstrahlung and GDR width from 252Cf cold fission

Abstract

The energy spectrum of the high energy gamma-rays in coincidence with the prompt gamma rays has been measured for the spontaneous fission of 252Cf. The nucleus-nucleus coherent bremsstrahlung of the accelerating fission fragments is observed and the result has been substantiated with a theoretical calculation based on the coulomb acceleration model. The width of the giant dipole resonance (GDR) decay from the excited fission fragments has been extracted for the first time and compared with the thermal shape fluctuation model (TSFM) in the liquid drop formalism. The extracted GDR width is significantly smaller than the predictions of TSFM.

12 pages, 3 figures, accepted for publication in Phys. Lett. B

References in corpus (2)

• LAMBDA: Large Area Modular BaF2 Detector Array for the measurement of high energy gamma rays
• Giant Dipole Resonance Width in near-Sn Nuclei at Low Temperature and High Angular Momentum

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• Examination of level density prescriptions in the interpretation of high energy gamma-ray spectra
• Neutron response of the LAMBDA spectrometer and neutron interaction length in BaF2
• A simplified spectrometer based on a fast digital oscilloscope for the measurement of high energy $\gamma$-rays