Characteristics of Secondary Electrons Ejected from Solid Targets by Multiply Charged Ions with Energy up to 20 MeV/Nucleon

Akkermann, A. F.; Botvin, V.A.; Chernov, G. Ya.

doi:10.1002/pssb.2221050203

Cited by 7 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We found this scaling law to hold up to (Fe), the maximal in our set of calculations. The distribution can be expressed as a simple power law, similar to that in [12] for (3) where Here, is in keV m , in MeV/amu and in m. and . , .…”

Section: Spatial Track Structurementioning

confidence: 99%

“…Here, we present new calculations of the major characteristics of ion-and electron-interactions in silicon, using updated data (compared to those in [11], [12]) for the optical energy loss function (OELF). These results were then used to calculate the distribution of deposited energy losses around the ion track, yielding in particular the radial distribution .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ion-track structure and its effects in small size volumes of silicon

Akkerman

Barak

2002

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

A model for ion-energy deposition in silicon, based on experimental data of the optical energy loss function, is presented. The model yields the characteristics of ion-and electron-interactions in silicon. Monte Carlo transport calculations based on this model give the energy distribution and its moments including a full and consistent description of the spatial ion track structure. The model was used for estimating the influence of the track structure on energy deposition in submicron devices and on the shape of the single event upsets (SEUs) cross-section curves.Index Terms-Dielectric response theory, dose radial distribution, energy deposition in nanometer volumes, inelastic atomic ion scattering, straggling.

show abstract

Section: Spatial Track Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ion-track structure and its effects in small size volumes of silicon

Akkerman

Barak

2002

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

show abstract

Radial Energy Transfer Density Distribution around the Fast Ion Tracks in Silicon and Germanium

Khlupin

Akkerman

1990

Physica Status Solidi (b)

View full text Add to dashboard Cite

The radial energy transfer density distributions around the tracks of fast protons (p), a-particles, and C-ions in Si and Ge targets are obtained by the Monte-Carlo method using individual collision scheme. A semiempirical formula for D(r) is proposed based on these calculations. Some aspects of its application are discussed. geHo paauanmoe pacnpeaeneme ~~O T H O C T U aaepruu, BbiaencIeMofi BoKpyr TpeHos geToB npeAaoHteHa n o n y a~n~p~s e c~a~ @opMyna ~J I H D(r). O6cymaam~c~ HeKoTopae MeTOAOM MOHTe-H'apJIO C MCIIOJIb30BaHHeM CXeMbI HH~WBUHYaJIbHbIX COyJUlpeHIlfi IlOny-6bICTPMX IIPOTOHOB, a- ¶aCTHIl H MOHOB c B MMLIIeHHX U3 si U Ge. Ha OCHOBe BTHX pac-aCIleKTbI ee IIpHMeHeHMH.

show abstract

Doubly differential cross section for binary encounter with massive projectile and isotropic target velocities

Draper

1982

Z Physik A

View full text Add to dashboard Cite

The nonrelativistic doubly differential cross section for electrons ejected from atoms by a massive beam of bare ions is derived in the binary encounter approximation. For cases already published the results sometimes differ by as much as a factor of 80 from those of Bonsen and Vriens, although the agreement should be exact. The case when the struck electron was initially very slow or stationary is also considered. Methods are presented for visualizing the kinematics including questions of minimum and maximum initial electron velocity for a given energy transfer. Also presented is a graphical means of visualizing the origin of the binary peak and of other effects for various atomic numbers Z of the target and various projectile velocities.When fast ions pass through matter the electrons ejected from the atoms are called delta rays. The distributions in energy and angle of these delta rays is an interesting subject with a long history. The detailed understanding of these doubly differential cross sections (ddcs) provides information about atomic structure as well as the mechanism of the reaction. The integral over angle gives the singly differential cross section (sdes). The integral of the sdcs over all positive total energies of the outgoing electron gives the cross section for ionization leading to X rays and the Auger processes. The most detailed information is contained in the ddcs. The relative importance of Coulomb ionization, charge transfer and shell interpenetration effects depend on the relation of the ion velocity, the average velocity of the bound electrons, the ionic charge, and the emission angle of the electron. The Coulomb ionization is most important for a bare ion at relatively large velocity, and the experimental ddcs for low Z targets is sometimes well described by Born approximation [-1]. The experimental sdcs is also fairly well described by a much simpler analysis [2] which is classical rather than quantal. The fact that the classical and the quantal derivations of the Rutherford scattering cross section give identical results is a key to this agreement. The classical model [3] of the ddcs which has provided some reasonable agreements with experiment is that of Bonsen and Vriens (BV). In this model the ion and a bound electron undergo Rutherford scattering. After energy is transfered to the electron it emerges from the atom with a final kinetic energy reduced by its ionization potential. The role of the atom's nucleus and other electrons is simply to provide an initial momentum distribution of the target electron, and one must integrate over this momentum distribution to obtain the ddcs. At least 19 publications [1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] have involved this BV model of the ddcs in their analysis. The advantage of the BV model is that the calculational complexity is much reduced, compared to Born approximation. Consequently the Born approximation for ddcs has been used almost exclusively for light targets. As mentioned above, the classical approach a...

show abstract

Characteristics of Secondary Electrons Ejected from Solid Targets by Multiply Charged Ions with Energy up to 20 MeV/Nucleon

Cited by 7 publications

References 11 publications

Ion-track structure and its effects in small size volumes of silicon

Ion-track structure and its effects in small size volumes of silicon

Radial Energy Transfer Density Distribution around the Fast Ion Tracks in Silicon and Germanium

Doubly differential cross section for binary encounter with massive projectile and isotropic target velocities

Contact Info

Product

Resources

About