Stopping of ∼0.2–3.4MeV/amu 1H+ and 4He+ ions in polyvinyl formal

Damache, S.; Moussa, D.; Ouichaoui, S.

doi:10.1016/j.nimb.2010.02.068

Cited by 9 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…elsewhere [12][13][14][15][16][17]25]. Then, only an account of the main experimental aspects is given in the following subsection.…”

Section: Experimental Set Up and Methodsmentioning

confidence: 99%

“…A maximum allowed bias voltage of 50 V was applied to the Si detector in order to minimize the associated pulse-high-defect that constitutes the main cause of the detector response non-linearity [40,41]. A data acquisition system made of standard EG & G Ortec electronics was associated to the detector for pulse processing and recording the proton energy loss spectra [14]. The achieved overall energy resolution of the detection system was of ~10.7 keV (FWHM) for 882 keV backscattered protons.…”

Section: Proton Beam and Detection Systemmentioning

confidence: 99%

“…This method [12][13][14][15][16][17]25] is very powerful for macroscopic non-uniformity scanning [25] since it relates only to ∆ ( measurements achieved with good accuracy. Multi-Gaussian curves were fitted to the experimental energy loss distributions recorded for alpha particles from the mixed radioactive source crossing the kapton target.…”

Section: Target Foil Properties Thickness and Non-uniformity Investig...mentioning

confidence: 99%

“…The ion mean energy loss and energy loss straggling variance are statistical quantities of crucial importance regarding both the understanding of the fundamental aspects of ion-matter interactions and ion beam analysis various applications [1][2][3][4][5][6][7][8]. The ion mean energy loss per travelled path length, i.e., the target material stopping power, , has been extensively investigated for various ion-target combinations over a wide range of ion bombarding energies [9][10][11][12][13][14][15][16][17][18][19]. In contrast, the energy loss straggling variance, Ω…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Stopping powers and energy loss straggling for (0.9–3.4) MeV protons in a kapton polyimide thin film

Damache

Djaroum²,

Ouichaoui

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

Self Cite

View full text Add to dashboard Cite

The energy loss and energy loss straggling widths have been measured in transmission for 0.9 -3.4 MeV protons traversing a thin kapton polyimide foil. In a prior step, the thickness and non-uniformity of the target foil were carefully investigated. The overall relative uncertainties in the stopping power and energy loss straggling variance data amount, respectively, to less than 2% and 8%. The experimental data show to be in excellent agreement with available previous ones and with those compiled in the ICRU-49 report. They are fully consistent with the predictions of Sigmund-Schinner's binary collision theory of electronic stopping over the whole proton energy range explored. An average deviation of ~2.5% relative to values calculated by the SRIM-2008 code, likely due to effects of valence electrons involving the , and bonds, is however observed at low proton velocities. The measured energy loss straggling data, which are unique to our knowledge, are found to be in good agreement with values derived by the classical Bohr formula for ≳ 1300 keV but they significantly exceed Bohr's collisional energy loss straggling at lower proton velocities where target electrons can no longer be considered as free. They also show to be consistent with the predictions of the Bethe-Livingston and Sigmund-Schinner theories over the low proton velocity region ( 1300 keV). However, they are significantly overestimated by these theories over the intermediate and high proton velocity regions, which may be due to bunching effect by inner shell electrons of the polymer target. Besides, our energy loss straggling data are in better overall consistency with the Yang, O'Connor and Wang empirical formula for 1300 keV, while deviations above the latter amounting up to ~18% are observed at lower proton velocities.

show abstract

“…elsewhere [12][13][14][15][16][17]25]. Then, only an account of the main experimental aspects is given in the following subsection.…”

Section: Experimental Set Up and Methodsmentioning

confidence: 99%

Section: Proton Beam and Detection Systemmentioning

confidence: 99%

Section: Target Foil Properties Thickness and Non-uniformity Investig...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stopping powers and energy loss straggling for (0.9–3.4) MeV protons in a kapton polyimide thin film

Damache

Djaroum²,

Ouichaoui

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

Self Cite

View full text Add to dashboard Cite

show abstract

“…3.2. Both peaks were fitted using the well known approach of Gaussian profile[98,99,100,101]. The energy difference of the centroids was used to determine the energy loss of protons passing through the foil.…”

mentioning

confidence: 99%

Energy loss of light ions (H+ and He+) in matter: high accuracy measurements and comparison with the FEG model

Moro¹

View full text Add to dashboard Cite

The phenomenon of energy loss that occurs when an ion interacts with matter, also called stopping power, has been investigated for more than a century, and has provided findings of interest. However, reliable procedures for obtaining accurate experimental measurements and a fully theoretical comprehension of the process are tasks still in high demand by the scientific community. Moreover, stopping power data are prerequisites in several applications in modern science, such as engineering, ion implantation and modification of materials, damage to electronics devices (e.g. space radiation), medical physics (e.g. proton therapy), among others. In this thesis we i) develop a rigorous experimental protocol to measure stopping power with high precision, and ii) investigate 1 the collapse of the free electron gas (FEG) model in energy loss of light ions (protons) at a low energy range in transition and rare-earth metals. In the first part, we present an approach to obtain, with high accuracy, the stopping cross sections in the pure materials Al and Mo for protons in the energy range of [0.9 − 3.6] MeV by means of the transmission method. The traceability of the sources of uncertainties are fully evaluated and the final accuracy of the results is 0.63 % (0.32 % rand. and 0.54 % syst.) for Al, and 1.5 % (0.44 % rand. and 1.4 % syst.) for Mo, with both results primarily limited by the quality and homogeneity of the stopping foils. For Al, this high accuracy represents an improvement com-Foremost I want to express my gratitude to my advisor, co-author and friend Prof. Dr. Manfredo H. Tabacniks. His guidance, encouragement over the years, vast scientific knowledge and notable vision in many other areas (e.g. ethics and interaction with participants) have always inspired me to reach interesting findings in physics and in life, always expanding my mind. Without his support, the accomplishments here presented would never have been possible. Thank you so much.

show abstract

Elastic Backscattering of Ions for Compositional Analysis

Jeynes

2012

Characterization of Materials

View full text Add to dashboard Cite

BS (elastic backscattering spectrometry, either RBS or EBS) using MeV beams is used to obtain elemental depth profiles of thin films up to ∼10 mm thick. Depth resolution degrades with depth but can be ∼1 nm at the surface. Various ion beams and various beam energies can be selected to obtain the optimal analytical conditions for particular samples. We will briefly mention the use of microbeams since many samples are small or laterally non‐homogeneous. We will also briefly mention the use of ion channelling geometries for characterizing defects in single crystal samples. We should also mention that LEIS and MEIS are both RBS techniques, but they use low energy beams and will not be covered in this article. We treat all the IBA techniques synergistically. The present article considers the details of analysis using a particle detector placed in the backscattering direction. We explicitly distinguish between RBS and EBS, even though in any particular BS spectrum there may be (and often are) both RBS and EBS signals, since there is a philosophical difference of treatment between a signal resulting from a Coulomb interaction and one resulting from an interaction that must be treated quantum mechanically.

show abstract

Stopping of ∼0.2–3.4MeV/amu 1H+ and 4He+ ions in polyvinyl formal

Cited by 9 publications

References 25 publications

Stopping powers and energy loss straggling for (0.9–3.4) MeV protons in a kapton polyimide thin film

Stopping powers and energy loss straggling for (0.9–3.4) MeV protons in a kapton polyimide thin film

Energy loss of light ions (H+ and He+) in matter: high accuracy measurements and comparison with the FEG model

Elastic Backscattering of Ions for Compositional Analysis

Contact Info

Product

Resources

About