Readjustment of the Neon Atom Ionized in theKShell by X Rays

First observation of a Fano profile following one step autoionization into a double photoionization continuum

“…In the double Auger decay, the excess energy is distributed between two electrons that are simultaneously ejected from the singly charged ion, leading to triply charged ions. Experimental evidence for direct double-photoionization processes [34] and for double Auger decay [35, 361 was found many years ago.…”

Investigation of the cascades in atoms using the global characteristics of spectra

“…Such simulation is repeated about 10 5 times and the final distribution of vacancies or charge distribution of the ions is found. Already in the first applications of this method [3][4][5][6] not only the radiative and Auger transitions, but also many-electron transitions in the shakeoff model were taken into account. During the development of the cascade some of the Auger transitions became energy forbidden: it was checked in [33] by computing the average energies equal to the differences of the average energies of initial and final configurations.…”

“…The charge state and photoion spectra were studied for Ne [3,49], Ar [4,11,12,[50][51][52][53], Kr [5,6,33,[53][54][55][56], Xe [6,9,16,34,35,46,[57][58][59][60], and for all of them [61][62][63]. Also such spectra were investigated for lanthanides [7-9, 15, 32, 64-66], Mg [50,67], Al, Si, S, Ca, Fe [50], Cu [18], Sr [68], Ba [69], Au [70], Re [71], and Ta [71].…”

“…The charge spectrometry was used for this purpose. In the middle of the sixties, a magnetic mass spectrometer was applied to detect photoions of various charges following irradiation of atomic gases by X-rays [3][4][5][6].…”

Energy and Angular Distributions of Electrons Emitted by Direct Double Auger Decay

“…In order to overcome the difficulty of discriminating this continuum from other sources, particularly from background electrons, coincidence studies are required. Ion-electron coincidence measurements initiated by Krause et al [5] were performed in several laboratories [6 -8] as a necessary step in order to corroborate the findings of Carlson and Krause and to further investigate the role of the double Auger decay in Auger cascades [9]. Only measurements detecting the two electrons in coincidence could identify whether the direct double Auger process is indeed the dominant decay mechanism leading to triply ionized final states.…”