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X-Ray Satellites Spectra In The Lβ2 Region, pp. 177-212 $25.00
Authors:  Surendra Poonia
Abstract:
The X-ray satellite spectra arising due to 2p3/2 -13x-1-3x-14d-1 (x ≡ s, p, d) transition array, in elements with Z = 42 to 90, have been calculated. While the energies of various transitions of the array have been determined by using available Hartree-Fock-Slater data on 1s-1-2p-13x-1 and 2p3/2 -1-3x-1,3x'-1 Auger transition energies, their relative intensities have been estimated by considering cross sections of singly ionized 2x-1 (x ≡ s, p) states and then of subsequent
Coster-Kronig and shake off processes. The calculated spectra have been compared with the measured satellite energies in Lβ2 spectra. Their intense peaks have been identified as the observed satellite lines. The one to one correspondence between the peaks in calculated
spectra and the satellites in measured spectra has been established on the basis of the agreement between the separations in the peak energies and those in the measured satellite energies. It has been established that four satellites observed in the Lβ2 region of the X-ray spectra of various elements and named β2 I, β2 (b), β2 II and β2
(c) in order of increasing energy are mainly emitted by 2p3/2
-13d-1-4d-2 transitions. In the present study, we report the transition assignments to the satellites β2 I, β2 (b), β2 II and β2
(c) reported in the spectra of elements with Z = 42 to 52 and the satellites named β2 I and β2 II in the L - emission spectra of the elements of 74W to 90Th. It is observed that out of these four satellites, β2 (b) can be assigned to superposition of 3F4-3G5 and 3F4-3D3 transitions and that this must be the most intense of all these satellites in the elements Z = 42-50. In the range of elements Z = 52 to 77, the satellite β2 I is emitted by these transitions. The same transitions have been proved to be the main origin of the satellite β2 II, reported in the elements 79Pt to 90Th. It has been well established that the transitions 1F3-1G4 and 3D3-3D3 is the main source of the emission of the satellite β2 II in the elements 42Mo to
77Ir. Coming to the other two satellites in this region of the spectra, the line β2 (c), observed in the spectra 42Mo to 50Sn, is mainly assigned to the transition 3P1-3D2. Lastly, the line β2
I, observed in the spectra of elements Z = 42 to 46, is assigned to the transitions 3D33F4 and 1D2-1F3, while in the range of elements with Z = 78 to 90, β2 I has been assigned to these transitions. In the elements 48Cd and 50Sn, the line β2 I has been associated with transition 3F4-3F4. Unfortunately, no experimental data are available on the intensities of these satellites. This suggests a need of detailed investigation, both theoretical and experimental, of these
spectra. 


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X-Ray Satellites Spectra In The Lβ2 Region, pp. 177-212