The Stopping Power of Matter for Positive Ions

Paul, H.

doi:10.5772/34974

Cited by 9 publications

(17 citation statements)

References 49 publications

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“…Indeed, Eq. (1) corresponds to the stopping power ratios between ions, which exhibit a sigmoidal energy dependence2333. Eq.…”

Section: Methodsmentioning

confidence: 99%

“…(1) can be viewed as a generalized Barkas scaling law, multiplying σ H (v) by a generalized Barkas factor, or, alternatively, as the original Barkas scaling of virtual hydrogen cross sections σ H (v)/(1 − exp(−125(v/c)) 2 . A scaling scheme that starts from cross sections for helium instead of hydrogen has been adopted in the MCDS1631 and compilations of scaling factors2333; after refinements analogous to Eq. (1) it may provide better results than the hydrogen-based scaling for particles with electronic structure similar to that of helium.…”

Section: Methodsmentioning

confidence: 99%

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Comprehensive track-structure based evaluation of DNA damage by light ions from radiotherapy-relevant energies down to stopping

Friedland

Schmitt

Kundrát

et al. 2017

Sci Rep

156

206

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Track structures and resulting DNA damage in human cells have been simulated for hydrogen, helium, carbon, nitrogen, oxygen and neon ions with 0.25–256 MeV/u energy. The needed ion interaction cross sections have been scaled from those of hydrogen; Barkas scaling formula has been refined, extending its applicability down to about 10 keV/u, and validated against established stopping power data. Linear energy transfer (LET) has been scored from energy deposits in a cell nucleus; for very low-energy ions, it has been defined locally within thin slabs. The simulations show that protons and helium ions induce more DNA damage than heavier ions do at the same LET. With increasing LET, less DNA strand breaks are formed per unit dose, but due to their clustering the yields of double-strand breaks (DSB) increase, up to saturation around 300 keV/μm. Also individual DSB tend to cluster; DSB clusters peak around 500 keV/μm, while DSB multiplicities per cluster steadily increase with LET. Remarkably similar to patterns known from cell survival studies, LET-dependencies with pronounced maxima around 100–200 keV/μm occur on nanometre scale for sites that contain one or more DSB, and on micrometre scale for megabasepair-sized DNA fragments.

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“…Indeed, Eq. (1) corresponds to the stopping power ratios between ions, which exhibit a sigmoidal energy dependence2333. Eq.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Comprehensive track-structure based evaluation of DNA damage by light ions from radiotherapy-relevant energies down to stopping

Friedland

Schmitt

Kundrát

et al. 2017

Sci Rep

156

206

View full text Add to dashboard Cite

show abstract

“…In these estimates the values taken for the mean excitation energy of water seems to be the major source of the bias, in fact, taking a value of 〈 〉 I w = 3.2 eV would result in an unbiased estimate (BB(73.2) in Table 3) for the data set of 32 materials. This value of 〈 〉 I w is in the range of values from the literature 67-82 eV [37,38]. Recently, Doolan et al [39] derived a set of optimized Table 2 The measured thickness t m ( ± 1 standard deviation) of the 32 sample materials.…”

Section: Comparison Of Experimental and Calculated Valuesmentioning

confidence: 90%

High accuracy proton relative stopping power measurement

Abbema

Goethem

Mulder

et al. 2018

Nuclear Instruments and Methods in Physics Research Section B:

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“…well below the percent level, impact on the calculated value. Figure 14: Ar, Kr and Xe stopping powers on nickel data [48] (symbols) compared to Knyazheva et al [7] model (dotdashed lines) and to DPASS [23] database before (dash lines) and after scaling to our data (solid lines)…”

Section: Models Adjustment To Our Datamentioning

confidence: 96%

“…Few programs allow to compute energy loss of any ion in any material in a broad energy range [25]. The most popular program nowadays is certainly SRIM-2013 [13].…”

Section: Models and Datamentioning

confidence: 99%

Stopping power of fission fragments in thin Mylar and nickel foils

Materna,

Berthoumieux,

Deshayes

et al. 2021

Preprint

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The energy loss of heavy ions in thin Mylar and nickel foils was measured accurately using fission fragments from 239 ( ℎ , ), mass and energy separated by the Lohengrin separator at ILL. The detection setup, placed at the focal plane of the Lohengrin separator enabled to measure precisely the kinetic energy difference of selected fragments after passing through the sample. From these data, the stopping powers in Mylar and nickel layers were extracted and compared to calculations. Whereas large deviations are observed with SRIM-2013 for Mylar, fairly good agreements are obtained with the semi-empirical approach of Knyazheva et al. and the calculations contained within the DPASS database. In nickel, SRIM-2013 and Knyazheva model are in agreement with our data within about 10 %, while large deviations are observed with DPASS. We used our data to provide updated parameters for the Knyazheva et al. model and rescale DPASS database for nickel and Mylar.

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The Stopping Power of Matter for Positive Ions

Cited by 9 publications

References 49 publications

Comprehensive track-structure based evaluation of DNA damage by light ions from radiotherapy-relevant energies down to stopping

Comprehensive track-structure based evaluation of DNA damage by light ions from radiotherapy-relevant energies down to stopping

High accuracy proton relative stopping power measurement

Stopping power of fission fragments in thin Mylar and nickel foils

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