Polarization and Correlation Phenomena in Atomic Collisions

Балашов, В.В.; Grum–Grzhimailo, A. N.; Kabachnik, N. M.

doi:10.1007/978-1-4757-3228-3

Cited by 286 publications

(344 citation statements)

References 0 publications

Supporting

Mentioning

339

Contrasting

Unclassified

Order By: Relevance

mentioning

confidence: 83%

“…The population of the intermediate H-like ion can be parameterized in terms of the polarization vector P = (P x , P y , P z ). From the symmetry considerations in our case, when the photons, emitted in course of recombination of unpolarized electrons with bare ions, are observed in a particular setup, only single parameter P y is non-zero [7].Information about the polarization of the H-like ions can be obtained from the analysis of the linear polarization of the second recombination photons. From the practical viewpoint it is more convenient to use the polarization ellipse parameters P L (the degree of linear polarization) and χ 0 (the orientation of the principal axis with respect to the reaction plane) for the description of the x-ray linear polarization.…”

mentioning

confidence: 96%

See 1 more Smart Citation

Production and diagnostics of spin-polarized heavy ions in the sequential two-electron radiative recombination

Майорова¹,

Surzhykov²,

Tashenov³

et al. 2013

Phys. Scr.

View full text Add to dashboard Cite

Within the last decades the radiative recombination (RR) by highly charged heavy ions remains the subject of intense theoretical and experimental research (see [1] and references therein). The RR is an effective tool for studying of the photoionization in the relativistic regime, which is not approachable directly at the present time. Moreover, the RR is interesting due to its sensitivity to the spin, relativistic and QED effects in the structure and dynamics of heavy atomic systems (see, e.g. [2,3]).In the recent years several experiments on researching the RR with polarized ion beams were proposed [4,5]. Furthermore, it was proposed to use the RR into polarized H-like ions as the tool for beam spin diagnostic [6]. Information about the ion polarization is required for studying, for example, the parity nonconservation effects in highly charged ions or in heavy-ion collisions. But all of proposed experiments are hampered now by the lack of polarized ions.In the present work we propose the method, that can be used for investigations of the RR into spin-polarized H-like ions. This approach is based on a subsequent capture of two electrons from two spatially separated targets by initial bare (finally He-like) ion and measurements of two emitted photons in coincidence. We choose the quantization axis (Z-axis) along the momentum p i of the incoming electron. After the capture of the first electron, a photon is emitted in the direction k 1 , determined by polar angle θ 1 . It turns out that the relative magnetic sublevel population of the resulting H-like ion depends on θ 1 . Hence the properties of the second photon, emitted in the direction k 2 characterized by two angles (θ 2 , ϕ 2 ), should be also dependent on θ 1 . The population of the intermediate H-like ion can be parameterized in terms of the polarization vector P = (P x , P y , P z ). From the symmetry considerations in our case, when the photons, emitted in course of recombination of unpolarized electrons with bare ions, are observed in a particular setup, only single parameter P y is non-zero [7].Information about the polarization of the H-like ions can be obtained from the analysis of the linear polarization of the second recombination photons. From the practical viewpoint it is more convenient to use the polarization ellipse parameters P L (the degree of linear polarization) and χ 0 (the orientation of the principal axis with respect to the reaction plane) for the description of the x-ray linear polarization. * Work supported by DFG, Helmholtz association, RFBR, FAIRRussia Research Center, Emmy Noether Programm and GSI.† maiorova@pcqnt1.phys.spbu.ruIn Fig. 1, we display P y as a function of θ 1 and χ 0 as a function of θ 2 in the case of ϕ 2 = 90 o . The calculations have been performed in the ion-rest frame for the incident electron energies ε i =109.7 keV, which correspond to the projectile energy T p = 200 MeV/u in the laboratory frame. As one can see from the figure, the polarization of the Hlike ions following RR is very sensitive to the geometry o...

show abstract

mentioning

confidence: 83%

mentioning

confidence: 96%

Production and diagnostics of spin-polarized heavy ions in the sequential two-electron radiative recombination

Майорова¹,

Surzhykov²,

Tashenov³

et al. 2013

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…The polarization state of the initial atom is characterized by the statistical tensors ρ k 0 0 (α 0 J 0 ) [34,35] which are defined with respect to the axis of the atomic polarization a = (ϑ a , ϕ a ). While the odd-rank tensors k 0 = 1, 3, .…”

Section: Cross Section For Resonant Photo-double-ionization Of Polarimentioning

confidence: 99%

“…This task is fulfilled by the present work which is devoted to the theoretical analysis of the angular distribution of electrons produced by photoionization and decay of polarized atoms, using the formalism of density matrix and statistical tensors [33][34][35]. Since the general form of the differential cross section for a polarized target is very complicated and not convenient for analysis, usually different kinds of dichroism, i.e.…”

Section: Introductionmentioning

confidence: 99%

Linear magnetic and alignment dichroism in Auger–photoelectron coincidence spectroscopy

Pieve

Fritzsche

Stefani

et al. 2007

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

Auger-photoelectron coincidence measurements for polarized targets are theoretically considered. We present a general expression for the cross section of sequential double photoionization of polarized atoms within the two-step model. Linear magnetic and alignment dichroism in coincidence experiments is discussed in more detail. For illustration, we made ab initio calculations based on the multiconfigurational Dirac-Fock theory for the 4d photoionization of atomic Sn followed by N-OO Auger decay.

show abstract

“…For all further details on this theory, we refer the reader to the literature [11,12,13,14]. Within the density matrix formalism, the state of a physical system is characterized by means of statistical operatorsρ which describe a single system or an ensemble of equally prepared collision systems in either a pure quantum state or in a mixture of different states with any given degree of coherence.…”

Section: Introductionmentioning

confidence: 99%

Angular and polarization analysis of x-rays emitted from highly-charged, few-electron ions

Fritzsche

Surzhykov

Stöhlker³

2007

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Polarization and Correlation Phenomena in Atomic Collisions

Cited by 286 publications

References 0 publications

Production and diagnostics of spin-polarized heavy ions in the sequential two-electron radiative recombination

Production and diagnostics of spin-polarized heavy ions in the sequential two-electron radiative recombination

Linear magnetic and alignment dichroism in Auger–photoelectron coincidence spectroscopy

Angular and polarization analysis of x-rays emitted from highly-charged, few-electron ions

Contact Info

Product

Resources

About