Radiation therapy for clinically localized prostate cancer

Echevarria, M.; Johnstone, Peter A.S.; Yamoah, Kosj

doi:10.1002/9781119129875.ch27

Cited by 1 publication

(1 citation statement)

References 42 publications

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“…Ion implantation has received much attention in recent decades because it can change the chemical, physical, and charge distribution of the target, offering novel research methods in materials science [1,2], biomedicine (e.g. radiation therapy for cancer [3]), nuclear engineering [4], space research [5], and more. The projectile ion interacts with the nuclear and the electrons of the target medium when the ions impinge on acceptor materials, the collision dissipates its kinetic energy and the projectile is slowed down in the crystal structure of the target.…”

Section: Introductionmentioning

confidence: 99%

Electronic stopping power for slow ions in the low-hardness semimetal HgTe using first-principles calculations

Zhang

et al. 2019

J. Phys.: Condens. Matter

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The electronic stopping power for low-velocity ions (including protons, α-particles, and C 4+ ) is investigated in a novel semimetal HgTe system, where the data are obtained with the aid of Ehrenfest dynamics combined with time-dependent density functional theory. For the light projectile ions (protons and α-particles), the linear and nonlinear behaviors of electronic stopping power in three different channel directions are analyzed in detail. In the case where the projectile ion is a proton, the linear results for the threshold velocity are correlated with an indirect band gap; the direction of the electronic stopping power depends on the radial drag force, the channeling electronic density and the trapped charge. More notably, we report an interesting channel-geometry fact, i.e. that the electronic stopping power of HgTe is powerfully modulated by the impact parameters. The parallel off-center tracks increase the electronic stopping power, making it more consistent with the SRIM data. In the case of an α-particle as the projectile ion, nonlinear behavior that varies with velocity can be ascribed to the charge transfer, which is another mode of energy dissipation. In addition, when the slightly heavier projectile C 4+ travels through the medium HgTe, the projectile C 4+ can capture more free charges than the protons and α-particles under the same circumstances. Especially, for the projectile in the off-channel, the electronic stopping power is close to the SRIM data with the decrease of the impact parameter. These results extend the study of radiation damage to a new field of materials.

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Section: Introductionmentioning

confidence: 99%

Electronic stopping power for slow ions in the low-hardness semimetal HgTe using first-principles calculations

Zhang

et al. 2019

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

Radiation therapy for clinically localized prostate cancer

Cited by 1 publication

References 42 publications

Electronic stopping power for slow ions in the low-hardness semimetal HgTe using first-principles calculations

Electronic stopping power for slow ions in the low-hardness semimetal HgTe using first-principles calculations

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