Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures

Ana Lucia Ferreira de Barros; Christian Fernando Mejía Guamán; Davi V. Doreste; Alicja Domaracka; Philippe Boduch; Hermann Rothard; Enio Frota da Silveira

doi:10.1016/j.nimb.2025.165926

Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures

Ana Lucia Ferreira de Barros (First Author)
, Christian Fernando Mejía Guamán
, Davi V. Doreste
, Alicja Domaracka
, Philippe Boduch
, Hermann Rothard
, Enio Frota da Silveira (Last Author)

Centro Federal de Educação Tecnológica Celso Suckow da Fonseca
Boulevard Henri Becquerel
Pontifícia Universidade Católica do Rio de Janeiro

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1 Scopus citations

Abstract

Ices in interstellar and planetary environments are constantly altered by cosmic radiation. Using FTIR spectroscopy, we analyse radiation-induced changes in ices containing H₂O, CO, CO₂, and CH₃OH, molecules abundant in the Solar System and interstellar medium. Molecular degradation is quantified by apparent cross-sections that scale with the electronic stopping power (S_e). Literature data reveal a power-law dependence, σ_d ∝ S_eⁿ, influenced by thickness, sputtering yield, and radiochemical effects. This empirical relationship serves as a benchmark for assessing molecular stability and the interplay between sputtering and radiolysis, improving models of chemical evolution in astrophysical ices.

Original language	English
Article number	165926
Pages (from-to)	1-16
Number of pages	16
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	570
Early online date	10 Nov 2025
DOIs	https://doi.org/10.1016/j.nimb.2025.165926
State	Published - Jan 2026

Keywords

Astrochemistry
Circumstellar clouds
Methods: Laboratory ion irradiation
Molecules

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10.1016/j.nimb.2025.165926

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Ferreira de Barros, A. L., Mejía Guamán, C. F., Doreste, D. V., Domaracka, A., Boduch, P., Rothard, H., & Silveira, E. F. D. (2026). Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 570, 1-16. Article 165926. https://doi.org/10.1016/j.nimb.2025.165926

Ferreira de Barros, Ana Lucia ; Mejía Guamán, Christian Fernando ; Doreste, Davi V. et al. / Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures. In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2026 ; Vol. 570. pp. 1-16.

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title = "Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures",

abstract = "Ices in interstellar and planetary environments are constantly altered by cosmic radiation. Using FTIR spectroscopy, we analyse radiation-induced changes in ices containing H2O, CO, CO2, and CH3OH, molecules abundant in the Solar System and interstellar medium. Molecular degradation is quantified by apparent cross-sections that scale with the electronic stopping power (Se). Literature data reveal a power-law dependence, σd ∝ Sen, influenced by thickness, sputtering yield, and radiochemical effects. This empirical relationship serves as a benchmark for assessing molecular stability and the interplay between sputtering and radiolysis, improving models of chemical evolution in astrophysical ices.",

keywords = "Astrochemistry, Circumstellar clouds, Methods: Laboratory ion irradiation, Molecules, Astrochemistry, Circumstellar clouds, Methods, Molecules, Laboratory ion irradiation",

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Ferreira de Barros, AL, Mejía Guamán, CF, Doreste, DV, Domaracka, A, Boduch, P, Rothard, H & Silveira, EFD 2026, 'Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 570, 165926, pp. 1-16. https://doi.org/10.1016/j.nimb.2025.165926

Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures. / Ferreira de Barros, Ana Lucia (First Author); Mejía Guamán, Christian Fernando; Doreste, Davi V. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 570, 165926, 01.2026, p. 1-16.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures

AU - Ferreira de Barros, Ana Lucia

AU - Mejía Guamán, Christian Fernando

AU - Doreste, Davi V.

AU - Domaracka, Alicja

AU - Boduch, Philippe

AU - Rothard, Hermann

AU - Silveira, Enio Frota da

PY - 2026/1

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N2 - Ices in interstellar and planetary environments are constantly altered by cosmic radiation. Using FTIR spectroscopy, we analyse radiation-induced changes in ices containing H2O, CO, CO2, and CH3OH, molecules abundant in the Solar System and interstellar medium. Molecular degradation is quantified by apparent cross-sections that scale with the electronic stopping power (Se). Literature data reveal a power-law dependence, σd ∝ Sen, influenced by thickness, sputtering yield, and radiochemical effects. This empirical relationship serves as a benchmark for assessing molecular stability and the interplay between sputtering and radiolysis, improving models of chemical evolution in astrophysical ices.

AB - Ices in interstellar and planetary environments are constantly altered by cosmic radiation. Using FTIR spectroscopy, we analyse radiation-induced changes in ices containing H2O, CO, CO2, and CH3OH, molecules abundant in the Solar System and interstellar medium. Molecular degradation is quantified by apparent cross-sections that scale with the electronic stopping power (Se). Literature data reveal a power-law dependence, σd ∝ Sen, influenced by thickness, sputtering yield, and radiochemical effects. This empirical relationship serves as a benchmark for assessing molecular stability and the interplay between sputtering and radiolysis, improving models of chemical evolution in astrophysical ices.

KW - Astrochemistry

KW - Circumstellar clouds

KW - Methods: Laboratory ion irradiation

KW - Molecules

KW - Astrochemistry

KW - Circumstellar clouds

KW - Methods

KW - Molecules

KW - Laboratory ion irradiation

UR - https://www.scopus.com/pages/publications/105021260911

UR - https://www.sciencedirect.com/science/article/abs/pii/S0168583X25003167

U2 - 10.1016/j.nimb.2025.165926

DO - 10.1016/j.nimb.2025.165926

M3 - Artículo

AN - SCOPUS:105021260911

SN - 0168-583X

VL - 570

SP - 1

EP - 16

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

M1 - 165926

ER -

Ferreira de Barros AL, Mejía Guamán CF, Doreste DV, Domaracka A, Boduch P, Rothard H et al. Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2026 Jan;570:1-16. 165926. Epub 2025 Nov 10. doi: 10.1016/j.nimb.2025.165926

Evaluation of the degradation cross-cection as stopping power dependence for pure and mixture molecular samples at cryogenic temperatures

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