In this study,we reconstruct theγ-photon energy spectrum,which is in good agreement with the experimental data of ^(86)Kr+^(12)C at E/A=44 Me V within the framework of the modified EQMD model.The directed and ellipti...In this study,we reconstruct theγ-photon energy spectrum,which is in good agreement with the experimental data of ^(86)Kr+^(12)C at E/A=44 Me V within the framework of the modified EQMD model.The directed and elliptic flows of free protons and direct photons were investigated by considering theα-clustering structure of ^(12)C.Compared with free protons,direct photon flows provide clearer information about the early stage of a nuclear reaction.The difference in the collective flows between different configurations of ^(12)C is observed in this study.This indicates that the collective flows of direct photons are sensitive to the initial configuration.Therefore,theγbremsstrahlung process might be taken as an alternative probe to investigate theα-clustering structure in a light nucleus from heavy-ion collisions within the Fermienergy region.展开更多
The radiative and Auger decay processes of K-shell ionized Np ions are studied theoretically using the flexible atomic code(FAC).Relativistic effects,Breit interaction,QED corrections and nuclear finite mass and volum...The radiative and Auger decay processes of K-shell ionized Np ions are studied theoretically using the flexible atomic code(FAC).Relativistic effects,Breit interaction,QED corrections and nuclear finite mass and volume effects are considered systematically.The resulting calculated K x-rays and Auger spectra of Np are compared with the measured spectra emitted after the electron-capture(EC)-decay of mass-separated ^(237)Pu.The general consistency between theory and experiment is good;the relative intensities and relative positions of the peaks in the measured spectra are reproduced with good accuracy,in spite of the existence of different ways to produce the primary K-shell vacancy,enabling identification of the observed structure in the experimental spectra.We find that most of the radiative transition rates are greater than the Auger transition rates,and the latter decrease rapidly with the transfer of initial vacancies to the outer shell.展开更多
基金supported by the Guangdong Major Project of Basic and Applied Basic Research(No.2020B0301030008)the National Natural Science Foundation of China(Nos.11890710,11890714,and 11961141003)the Strategic Priority Research Program of the CAS(No.XDB34000000)。
文摘In this study,we reconstruct theγ-photon energy spectrum,which is in good agreement with the experimental data of ^(86)Kr+^(12)C at E/A=44 Me V within the framework of the modified EQMD model.The directed and elliptic flows of free protons and direct photons were investigated by considering theα-clustering structure of ^(12)C.Compared with free protons,direct photon flows provide clearer information about the early stage of a nuclear reaction.The difference in the collective flows between different configurations of ^(12)C is observed in this study.This indicates that the collective flows of direct photons are sensitive to the initial configuration.Therefore,theγbremsstrahlung process might be taken as an alternative probe to investigate theα-clustering structure in a light nucleus from heavy-ion collisions within the Fermienergy region.
基金Supported by the National Natural Science Foundation of China under Grant Nos 91126007,10847007,10964010,11064012.
文摘The radiative and Auger decay processes of K-shell ionized Np ions are studied theoretically using the flexible atomic code(FAC).Relativistic effects,Breit interaction,QED corrections and nuclear finite mass and volume effects are considered systematically.The resulting calculated K x-rays and Auger spectra of Np are compared with the measured spectra emitted after the electron-capture(EC)-decay of mass-separated ^(237)Pu.The general consistency between theory and experiment is good;the relative intensities and relative positions of the peaks in the measured spectra are reproduced with good accuracy,in spite of the existence of different ways to produce the primary K-shell vacancy,enabling identification of the observed structure in the experimental spectra.We find that most of the radiative transition rates are greater than the Auger transition rates,and the latter decrease rapidly with the transfer of initial vacancies to the outer shell.
