Properties Of The Kα X-ray Transitions In Highly Ionized Cr And Mn

The highly ionized atoms spectroscopy is the basis of studying atomicstructure,physic procedure of high temperature plasma and plasma diagnosistechnology. The spectroscopy of highly charged ions is a subject of great interest inboth pure atomic-structure physics and applications such as hot-plasma diagnosticsand x-ray-laser development.These are on the theoretical front and the data are theinevitable basis data in ICF and MCF.Some K X-ray spectra of chromium andmanganese has been carried out scattered,but systematic calculations on the K X-rayspectra of chromium and manganese are still fragmentary. It is essential to study theproperties of these lines in detail.In this paper, by using relativistic configuration interaction (RCI)andmulti-configuration Dirac-Fock (MCDF) method in the active space interactionapproach,the KαX-ray transitions including transition energies, radiativerates, oscillator strengths, and line strengths for the states of ls2p~r, 1s2s2p~r and(r=1-6) are carried out in the extended optimal level scheme.Additionally, thecontributions from Breit interaction,quantum electrodynamics (QED) and nuclearmass corrections to the initial and final levels have been taken into account.Our calculated values are compared with the other available data and are foundto be in good agreement with them. This could justify our present calculated resultsto be reliable. Our systematic new data provide reference value for levellifetime, charge state distribution and analyzing and model building of chromium and manganese plasmas.Our results indicated that,1. Relativistic effect,breit and QED correction have made partial energy orderchanged.These can not be ignored in treating highly stripped ions.2. It could be found that the effect of the 2s core correlation on the QED effectis substantial whereas the effect of 2p core is small.In the case of the electronicdipole between two states,Breit interaction and self-energy are dominating factorsamong the relativistic potential and vacuum polarization is small.3. The transition energies from higher multiplicitas terms to lower multiplicitasterms could be always higher than those from lower multiplicitas terms to highermultiplicitas terms.4. To a certain spectra lines,as the qutatum number increase,the transitionprobability and oscillator strength decrease,but the decreasing amplitude oftransition probability is smaller than those of strength.5. The average transition energies of manganese are higher about eighteen a.u.than which of chromium.And the radiative rates,oscillator strengths,and linestrengths of manganese are all bigger than those of chromium.Our calculated values are compared with the other available data and are foundto be in good agreement with them.In this work, we report accurate transitionproperties from CrⅩⅥthrough CrⅩⅩⅢand from MnⅩⅥthrough MnⅩⅩⅢ.Thesesystematic data provide reference value for level lifetime,charge state distributionand analyzing and model building of chromium and manganese plasmas.