J. El Asri et al. / Atom Indonesia Vol. 47 No. 1 (2021) 17 - 23
..
Calculated Electronic Energy Loss of Heavy Ions
at Low Energies in LR-115, Kapton, SiO
2
, and
Al
2
O
3
Amorphous Materials
J. El Asri
1
, O. El Bounagui
2*
, N. Tahiri
3
, A. Chetaine
1
, H. Erramli
4
1
Nuclear Reactor, Nuclear security and Environment, Faculty of Sciences, Mohammed V University in Rabat,
4 Avenue Ibn Batouta B.P. 1014 RP, Rabat, Morocco
2
EPHE-SM, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Batouta B.P. 1014 RP, Rabat, Morocco
3
LaMCScl, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Batouta B.P. 1014 RP, Rabat, Morocco
4
Faculty of Science Semlalia, University Cadi Ayyad Marrakech, BP 511 Avenue Prince Abdellah Marrakech, Morocco
A R T I C L E I N F O A B S T R A C T
Article history:
Received 17 July 2020
Received in revised form 2 December 2020
Accepted 3 December 2020
Keywords:
Electronic stopping power;
Modified LSS theory;
Heavy ions;
Polymeric foils
The electronic stopping powers of LR-115 and Kapton polymeric foils have been
estimated, using Monte Carlo simulations, for
9
Be,
11
B,
12
C,
14
N,
16
O, and
35
Cl ions
covering the energy range 0.1-1.0 MeV/n. Comparison of stopping power based on
Lindhard, Scharff, and Schiott (LSS) theory with the corresponding values obtained
by SRIM and MSTAR codes in LR-115 and Kapton polymeric foils illustrate a
significantly large deviations. However, a semiempirical equation has been
proposed here and tested for better stopping power calculations at low-energy
regime in the domain of LSS theory for Z = 4-8 ions across materials. Furthermore,
the electronic energy losses for
9
Be and
16
O ions in SiO
2
and Al
2
O
3
, respectively,
have been calculated in the energy range of 0.1-1.0 MeV/n. The calculated
stopping powers exhibit up to 10 % deviation from the experimental values and
MSTAR data.
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INTRODUCTION
The LSS theory was developed by Lindhard,
Scharff, and Schiott [1] to calculate and evaluate the
electronic energy loss at low energies. However, the
deceleration and scattering of charged particle in
matter is considerably used in several techniques and
phenomenon of physics such as: ion channeling,
radiation damage, sputtering, the reflection and
transmission of charged particles, and charged
particle activation analysis [2,3]. At low energies,
the Bethe formula [4] cannot be used to calculate the
electronic energy loss, because the inner-shell
contribution to the energy loss is relatively
negligible. In fact, the energy loss becomes
proportional to the velocity of the projectile.
Experimental and theoretical studies have been
investigated on the electronic energy loss for
different ions and target materials [5-7]. Moreover,
the Monte Carlo simulation (MCs) has a number of
Corresponding author.
E-mail address: elbounagui@gmail.com
DOI: https://doi.org/10.17146/aij.2021.1080
advantages in comparison to analytical formulations
based on the transport theory [8-10]. Furthermore,
the electronic energy loss of light and heavy ions in
compound materials have attracted attention in
recent years [11-14] due to their increasing use in
ion beam applications and materials science. Several
measurements of the energy loss have been
conducted and compared with the calculated values
for heavier ions [15]. Also, many experiments have
been conducted to determine the electronic stopping
power for different heavy ions with Z
1
= 5 to 29 in
silicon dioxide and various polymeric materials such
as polyethylene terephthalate or PET (C
10
H
8
O
4
)
n
,
polycarbonate/PC (C
16
H
14
O
3
)
n
, and polyethylene
naphthalate/PEN (C
14
H
10
O
4
)
n
[16]. In a previous
paper, calculations of the stopping power data of the
heavy ions of
19
F,
23
Na,
24
Mg,
27
Al,
28
Si,
31
P,
32
S,
35
Cl, and
40
Ar were reported for Formvar and Mylar
polymeric materials for the 0.1 to 1.0 MeV/n energy
region [17]. More experiments are needed for
various ions and stopping targets to draw a definite
conclusion about the usefulness of the LSS theory in
the low-energy region. Until it is definitely
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Atom Indonesia Vol. 47 No. 1 (2021) 17 - 23
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