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Inelastic scattering of electron and light ion beams in organic polymers
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10.1063/1.3581120
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Affiliations:
1 Departament de Física Aplicada, Universitat d’Alacant, E-03080 Alacant, Spain
2 Departamento de Física - Centro de Investigación en Óptica y Nanofísica, Universidad de Murcia, E-30100 Murcia, Spain
a) Electronic mail: pablo.vera@ua.es.
J. Appl. Phys. 109, 094901 (2011)
/content/aip/journal/jap/109/9/10.1063/1.3581120
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/9/10.1063/1.3581120

## Figures

FIG. 1.

(Color online) Energy loss function, ELF, in the optical limit (k = 0) of: (a) PMMA, (b) Kapton, (c) PA, and (d) P2VP as a function of the transferred energy, . Solid curves were obtained through the MELF-GOS method (as described in the text), whereas experimental data for eV were taken from different sources: (a) ⋄ (Ref. ), (b) (Ref. ), (c) ▽ (Ref. ), and (d) ◃ (Ref. ). The symbols (□) correspond to the ELF values at high transferred energies obtained from x-ray scattering factors (Ref. ).

FIG. 2.

(Color online) Inelastic mean free path of electrons in: (a) PMMA, (b) Kapton, (c) PA, and (d) P2VP, as a function of incident kinetic energy. Solid black and gray lines are the results from the MELF-GOS method in this work with and without the Born–Ochkur exchange correction (Ref. ), respectively. Dotted lines are the results from the TPP model without exchange correction (Ref. ). Dashes lines in (a), (c), and (d) are the results from Akkerman and Akkerman (Ref. ) with Ashley’s exchange. Dash-dotted line in (d) is the result from Tan et al. (Ref. ). with Born–Ochkur exchange. Available experimental data are presented by symbols: ⊡PMMA (Ref. ), ⊠Kapton (Ref. ), and PA (Ref. ).

FIG. 3.

(Color online) Stopping power of (a) PMMA, (b) Kapton, (c) PA, and (d) P2VP for an electron beam, as a function of incident kinetic energy. Solid black and gray lines correspond to the results obtained from the MELF-GOS method in this work with and without the Born–Ochkur exchange correction (Ref. ), respectively. Dashed lines in (a), (c), and (d) are the results from Akkerman and Akkerman (Ref. ) with Ashley’s exchange factor. Dash-dotted line in (d) is the result from Tan et al. (Ref. ) with Born–Ochkur exchange.

FIG. 4.

(Color online) Stopping power of the four organic polymers, for proton and -particle beams, as a function of incident kinetic energy: (a) PMMA, (b) Kapton, (c) PA, and (d) P2PV. Solid lines are the results obtained in this work with the MELF-GOS method. Symbols represent experimental data (only available for Kapton): (Ref. ), (Ref. ), ⊡ (Ref. ), (Ref. ) ⋄ (Ref. ) and (Ref. ). Other calculations are also shown: dashed lines from SRIM code (Ref. ), dash-dot-dotted lines from ICRU (Ref. ), and dash-dotted lines from Akkerman and Akkerman (Ref. ).

FIG. 5.

(Color online) Energy-loss straggling calculated with the MELF-GOS method in this work for (a) proton and (b) -particle beams interacting with: PMMA (solid line), Kapton (dashed line), PA (dash-dotted line), and P2VP (dash-dot-dot line). Horizontal lines represent the Bohr straggling for each polymer, as indicated by the respective labels.

## Tables

Table I.

Properties of the polymers studied in this work.

Table II.

Parameters used to fit the outer electronic excitations through Eq. .

Table III.

Mean excitation energy I (eV) of the four polymers, obtained by several methods.

Table IV.

Parameters used to apply Eq. to the four polymers discussed in this work.

Table V.

Parameters used in Eq. to fit our calculated S for the four polymers studied in this work.

Table VI.

Bohr straggling for protons and -particles for the four polymers studied in this work.

/content/aip/journal/jap/109/9/10.1063/1.3581120
2011-05-03
2014-04-24

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