| Title: | Ion-specific kinetic energy distributions in MeV-SIMS : insights into electronic sputtering processes |
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| Authors: | ID Jenčič, Boštjan, Institut "Jožef Stefan" (Author)
ID Lorentzen, Mirjana Sepahyar (Author)
ID Kelemen, Mitja, Institut "Jožef Stefan" (Author)
ID Pelicon, Primož, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S1387380626000400?via%3Dihub
 PDF - Presentation file, download (1,91 MB)
MD5: 98E0FF4348761DE2FEF69A2260ED3D1E
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | Kinetic energy distributions of secondary ions produced by fast heavy primary ions (3 – 10 MeV 35Cl, charge states 4+, 5+ and 7+) were measured to interpret the dynamics of ion desorption and formation under electronic stopping regime. All measurements were done on organic targets, such as various amino-acids and polymers, and were conducted using a reflectron mass spectrometer with a reflector electrode used as a tool to discriminate ions below the selected kinetic energy. Typical average kinetic energies of molecular ions range from 0.5 to 5 eV, with some smaller monoatomic ions or ion clusters, such as H+ and H2+, exceeding 5 eV in average energy and exhibiting broader distributions. The type of cation was found to significantly affect kinetic energy distributions of organic molecules, with Ag adducts resulting in significantly lower kinetic energies and more pronounced “negative tailing” than e.g. protonated species. Systematic measurements across different target voltages ruled out gas-phase ion formation as a significant source of this tailing, which is more likely due to strong surface interactions or delayed ejection dynamics, specific to several secondary ion species. Additionally, fragmentation was found as a source of redistribution of internal energy into translational motion. On the other hand, the primary ion energy did not significantly affect the kinetic energy distributions of any analyzed species, thus confirming the dominance of the electronic stopping over nuclear stopping within the selected primary ion energy domain. |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 19.11.2025 |
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| Article acceptance date: | 14.03.2026 |
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| Publication date: | 15.03.2026 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | 1-6 str. |
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| Numbering: | Vol. 524 |
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| Source: | Nizozemska |
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| PID: | 20.500.12556/DiRROS-28517  |
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| UDC: | 53 |
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| ISSN on article: | 1387-3806 |
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| DOI: | 10.1016/j.ijms.2026.117609 |
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| COBISS.SI-ID: | 272581379 |
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| Copyright: | © 2026 The Authors. |
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| Publication date in DiRROS: | 23.03.2026 |
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| Views: | 146 |
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| Downloads: | 89 |
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