High-energyγ-rays from the deexcitation of giant dipole resonance have been measured from the decay of compound nucleus ^(132)Ce^(*) formed by the ^(16)O+^(116)Sn reaction at an incident particle energy of 85.0MeV of...High-energyγ-rays from the deexcitation of giant dipole resonance have been measured from the decay of compound nucleus ^(132)Ce^(*) formed by the ^(16)O+^(116)Sn reaction at an incident particle energy of 85.0MeV of ^(16)O.Theγ-ray multiplicity distribution of this reaction is calibrated with a multiplicity filter composed of 14 hexagonal BGO crystals.The shape evolution of the ^(132)Ce^(*) has been studied as a function of spin.The results reveal that the deformation parameter of prolate ^(132)Ce reduces when spin increases.展开更多
The frequency distribution of different ingredients in-ray spectra,e.g.,photo-peak,fluctuations of counts and Compton region,is separately analyzed.After wavelet transform of-ray spectra,the wavelet coefficients of a ...The frequency distribution of different ingredients in-ray spectra,e.g.,photo-peak,fluctuations of counts and Compton region,is separately analyzed.After wavelet transform of-ray spectra,the wavelet coefficients of a photo-peak increase with transforming scales and these coefficients show direct proportion with intensity of peak at determinate scale.A novel algorithm based on wavelet transform is proposed and studied.The results indicate that most of the photo-peaks in multi-spectra can be determined accurately,the-rays energy and intensity of the peak can also be determined.This method has the prospect of being applied in on-line multi-spectra analysis in such fields as radioprotection and nuclear safety monitoring.展开更多
基金Supported in part by the National Natural Science Foundation of China.
文摘High-energyγ-rays from the deexcitation of giant dipole resonance have been measured from the decay of compound nucleus ^(132)Ce^(*) formed by the ^(16)O+^(116)Sn reaction at an incident particle energy of 85.0MeV of ^(16)O.Theγ-ray multiplicity distribution of this reaction is calibrated with a multiplicity filter composed of 14 hexagonal BGO crystals.The shape evolution of the ^(132)Ce^(*) has been studied as a function of spin.The results reveal that the deformation parameter of prolate ^(132)Ce reduces when spin increases.
基金supported by the Fundamental Research Funds for the Central Universities (Grant No.13QN50)the National Natural Science Foundation of China (Grant No.11275271)
文摘The frequency distribution of different ingredients in-ray spectra,e.g.,photo-peak,fluctuations of counts and Compton region,is separately analyzed.After wavelet transform of-ray spectra,the wavelet coefficients of a photo-peak increase with transforming scales and these coefficients show direct proportion with intensity of peak at determinate scale.A novel algorithm based on wavelet transform is proposed and studied.The results indicate that most of the photo-peaks in multi-spectra can be determined accurately,the-rays energy and intensity of the peak can also be determined.This method has the prospect of being applied in on-line multi-spectra analysis in such fields as radioprotection and nuclear safety monitoring.
