Electronic stopping power of protons and alpha particles in nickel

Quashie, Edwin E.; Correa, Alfredo A.

doi:10.1103/physrevb.98.235122

Cited by 30 publications

(30 citation statements)

References 62 publications

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“…In the simulations under channeling conditions, S e is 35% smaller than the SRIM prediction at v ∼ 1 a.u.. This difference when comparing channeling and off-channeling S e is expected and consistent with previous simulation works [36,40]. The result for NiCr shows a slightly higher S e when compared with its counterparts (NiFe, NiCo) and Ni across the overall range both for the channeling and off-channeling case, although NiCr has fewer number of valence electrons in the simulation.…”

Section: Resultssupporting

confidence: 89%

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Effect of Chemical Disorder on the Electronic Stopping of Solid Solution Alloys

et al. 2020

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The electronic stopping power of nickel-based equiatomic solid solutions alloys NiCr, NiFe and NiCo for protons and alpha projectiles is investigated in detail using real-time time-dependent density functional theory over a wide range of velocities. Recently developed numerical electronic structure methods are used to probe fundamental aspects of electron-ion coupling non-perturbatively and in a fully atomistic context, capturing the effect of the atomic scale disorder. The effects of particular electronic band structures and density of states reflect in the low velocity limit behavior. We compare our results for the alloys with those of a pure nickel target to understand how alloying affects the electronic stopping. We discover that NiCo and NiFe have similar stopping behavior as Ni while NiCr has an asymptotic stopping power that is more than a factor of two larger than its counterparts for velocities below 0.1 a.u.. We show that the low-velocity limit of electronic stopping power can be manipulated by controlling the broadening of the d-band through the chemical disorder. In this regime, the Bragg's additive rule for the stopping of composite materials also fails for NiCr. arXiv:1912.03399v1 [cond-mat.mtrl-sci]

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Section: Resultssupporting

confidence: 89%

“…4). From previous work [36,40], we know that for the Period 4 transition metals, projectiles at velocities below 0.8 a.u., for example, depend critically on the electronic structure in a range of ∼ 3.2 eV around the Fermi energy (according to (Fig. 4).…”

Section: Resultsmentioning

confidence: 97%

Effect of Chemical Disorder on the Electronic Stopping of Solid Solution Alloys

et al. 2020

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“…Remarkably, a quite similar, i.e., two-slope, behavior was found in [16] for Ni (r s 1.8) with a singly ionized He + intruder. There a comparison with TDDFT results [31] was made by using 1.15 as a multiplying factor for the simulation-based results. As we already discussed above, we can image such a two-slope behavior within the present theoretical framework with certain, presumably closest-approach-dependent [32], finer-tuning of our two nonlinear channels.…”

Section: Resultsmentioning

confidence: 99%

Two-channel approach to the average retarding force of metals for slow singly ionized projectiles

Nágy

Aldazabal

2020

Phys. Rev. A

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Based on the fundamental momentum-transfer theorem [B. A. Lippmann, Phys. Rev. Lett. 15, 11 (1965)], a contribution to the retarding force of metallic systems for slow intruders is derived. This contribution is associated with sudden charge-changing cycles during the path of projectiles. The sum of this and the well-known conventional contributions, both expressed in terms of scattering phase shifts, is used to discuss experimental data obtained for different targets. It is found that our two-channel modeling, with two nonlinear channels, improves the agreement between data and theory and thus, as predictive modeling, can contribute to the desired convergence between experimental and theoretical attempts at the retarding force.

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“…Figure 1 presents the case when all the incident protons hitting the target atoms have the same energy equal to the respective value given in the abscissa axis. However, the projectiles energy decreases continuously with the distance passed inside the target as a result of their interactions with the target's atoms [86,87]. Thus, sufficiently thick target is able to reduce high energy of the incident projectiles (descending section of the curve from Fig.…”

Section: Target Requirementsmentioning

confidence: 99%

Electrochemical deposition of nickel targets from aqueous electrolytes for medical radioisotope production in accelerators: a review

Mieszkowska

Grdeń

2021

J Solid State Electrochem

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This paper reviews reported methods of the electrochemical deposition of nickel layers which are used as target materials for accelerator production of medical radioisotopes. The review focuses on the electrodeposition carried out from aqueous electrolytes. It describes the main challenges related to the preparation of suitable Ni target layers, such as work with limited amounts of expensive isotopically enriched nickel; electrodeposition of sufficiently thick, smooth and free of cracks layers; and recovery of unreacted Ni isotopes from the irradiated targets and from used electrolytic baths.

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Electronic stopping power of protons and alpha particles in nickel

Cited by 30 publications

References 62 publications

Effect of Chemical Disorder on the Electronic Stopping of Solid Solution Alloys

Effect of Chemical Disorder on the Electronic Stopping of Solid Solution Alloys

Two-channel approach to the average retarding force of metals for slow singly ionized projectiles

Electrochemical deposition of nickel targets from aqueous electrolytes for medical radioisotope production in accelerators: a review

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