Direct Comparison of the Penetration of Solids and Liquids by Positrons and Electrons

Takhar, P. S.

doi:10.1103/physrev.157.257

Cited by 35 publications

(3 citation statements)

References 14 publications

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“…The discrepancy was also reported by Takhar (1967) and by Patrick and Rupaal (1971) who employed pand p' sources with comparable maximum energies E,,,. Ram et a1 (1981) applied corrections for differences between E;, and E,&x. Recalling that the mean energy of a @emitter…”

Section: Comparison Of Electron and Positron Penetrationmentioning

confidence: 63%

Penetration of fast electrons and positrons

Hansen¹,

Ingerslev-Jensen²

1983

J. Phys. D: Appl. Phys.

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A thorough investigation of Lewis' formal solution of the multiple scattering problem for an infinite medium is presented. The account includes the mean value and the longitudinal dispersion of the projected range distribution and also the transverse dispersion for 10-3000 keV electrons and positrons in a number of monatomic targets. A method for comparison with experimental data is described and applied. Approximate results for semi-infinite targets are shown to compare well with experiments even for heavy elements where the deviations relative to infinite targets are shown to be most pronounced and related to the probability of back-scattering. Finally, the authors note that an unresolved discrepancy appears to persist between theoretically and experimentally determined differences of electron and positron penetration.

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Section: Comparison Of Electron and Positron Penetrationmentioning

confidence: 63%

Penetration of fast electrons and positrons

Hansen¹,

Ingerslev-Jensen²

1983

J. Phys. D: Appl. Phys.

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“…Another area that will undoubtedly receive increased attention in future studies deals with positron dosimetry in biological tissue. For decades it has been known the because of the differences in stopping powers, energetic positrons will penetrate further in water (Takhar 1967), a chief component of living cells. Thus, more studies such as the TCS measurements for DNA bases that have been performed at ANL (Machacek et al 2015) or TDCS measurements capable of testing the predictions of Dal Cappello et al (2012) are expected.…”

Section: Future Directionsmentioning

confidence: 99%

Methods and progress in studying inelastic interactions between positrons and atoms

DuBois¹

2016

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

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Progress and methods used in positron based studies of inelastic atomic interactions are traced from the original discovery of the positron to the present. Following a historic overview and introduction, this review will show how new experimental techniques were critical in advancing experimental studies from total or integral cross section measurements to highly differential investigations that are now being performed. The primary emphasis is on ionization of atoms and simple molecules by low-energy (tens to hundreds of eV) positrons and in showing similarities and differences between positron, electron and proton impact data. Selected examples of Ps based studies are also included. Experimental techniques associated with the generation, moderation, and transport of low-energy positron beams plus an extensive reference list and tables summarizing existing experimental studies are provided. Comments with respect to future studies and directions, plus how they might be achieved, are presented.

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“…These facts lead to an absorption law which is very different from the exponential law for gamma or x-rays. Some completely theoretical [21][22][23] and some semi-empirical calculations have been reported. Ultimate-…”

Section: N+j-1mentioning

confidence: 99%

Positron annihilation in metals at very high pressures

Przybylinski¹

1970

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Direct Comparison of the Penetration of Solids and Liquids by Positrons and Electrons

Cited by 35 publications

References 14 publications

Penetration of fast electrons and positrons

Penetration of fast electrons and positrons

Methods and progress in studying inelastic interactions between positrons and atoms

Positron annihilation in metals at very high pressures

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