Infrared Spectral Signatures of Nucleobases in Interstellar Ices I: Purines

Autor: Caroline Antunes Rosa, Alexandre Bergantini, Péter Herczku, Duncan V. Mifsud, Gergő Lakatos, Sándor T. S. Kovács, Béla Sulik, Zoltán Juhász, Sergio Ioppolo, Heidy M. Quitián-Lara, Nigel J. Mason, Claudia Lage

Publikováno v: Life, Vol 13, Iss 11, p 2208 (2023)

The purine nucleobases adenine and guanine are complex organic molecules that are essential for life. Despite their ubiquitous presence on Earth, purines have yet to be detected in observations of astronomical environments. This work therefore propos

Externí odkaz: https://doaj.org/article/d1b6439ca071405a8bbf300113bd984a

Bombardment of CO Ice by Cosmic Rays. I. Experimental Insights into the Microphysics of Molecule Destruction and Sputtering

Autor: Alexei V. Ivlev, Barbara M. Giuliano, Zoltán Juhász, Péter Herczku, Béla Sulik, Duncan V. Mifsud, Sándor T. S. Kovács, K. K. Rahul, Richárd Rácz, Sándor Biri, István Rajta, István Vajda, Nigel J. Mason, Sergio Ioppolo, Paola Caselli

Publikováno v: The Astrophysical Journal, Vol 944, Iss 2, p 181 (2023)

We present a dedicated experimental study of microscopic mechanisms controlling radiolysis and sputtering of astrophysical ices upon bombardment by cosmic-ray ions. Such ions are slowed down owing to inelastic collisions with bound electrons, resulti

Externí odkaz: https://doaj.org/article/ae705b2106c0457a8e6ba92d55b5d721

Energetic Electron Irradiations of Amorphous and Crystalline Sulphur-Bearing Astrochemical Ices

Autor: Mifsud, Duncan V., Péter Herczku, Richárd Rácz, Rahul, K. K., Kovács, Sándor T. S., Zoltán Juhász, Béla Sulik, Sándor Biri, Mccullough, Robert W., Zuzana Kaňuchová, Sergio Ioppolo, Hailey, Perry A., Mason, Nigel J.

Publikováno v: Mifsud, D V, Herczku, P, Rácz, R, Rahul, K K, Kovács, S T S, Juhász, Z, Sulik, B, Biri, S, McCullough, R W, Kaňuchová, Z, Ioppolo, S, Hailey, P A & Mason, N J 2022, ' Energetic Electron Irradiations of Amorphous and Crystalline Sulphur-Bearing Astrochemical Ices ', Frontiers in chemistry . < http://adsabs.harvard.edu/abs/2022arXiv221001119M >
Aarhus University
Frontiers in Chemistry

Laboratory experiments have confirmed that the radiolytic decay rate of astrochemical ice analogues is dependent upon the solid phase of the target ice, with some crystalline molecular ices being more radio-resistant than their amorphous counterparts

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44b4a3c0eda5f3bdcbb1030988b0d5c2
https://pure.au.dk/portal/da/publications/energetic-electron-irradiations-of-amorphous-and-crystalline-sulphurbearing-astrochemical-ices(23188eb8-9567-4748-a48e-50d8815bc1fd).html

Ozone Production in Electron Irradiated CO2:O2 Ices

Autor: Duncan V. Mifsud, Zuzana Kaňuchová, Sergio Ioppolo, Péter Herczku, Alejandra Traspas Muiña, Béla Sulik, K. K. Rahul, Sándor T. S. Kovács, Perry A. Hailey, Robert W. McCullough, Nigel J. Mason, Zoltán Juhász

Publikováno v: Mifsud, D V, Kaňuchová, Z, Ioppolo, S, Herczku, P, Traspas Muiña, A, Sulik, B, Rahul, K K, Kovács, S T S, Hailey, P A, McCullough, R W, Mason, N J & Juhász, Z 2022, ' Ozone production in electron irradiated CO2:O2 ices ', Physical Chemistry Chemical Physics, vol. 24, no. 30, pp. 18169-18178 . https://doi.org/10.1039/d2cp01535h
Mifsud, D V, Kaňuchová, Z, Ioppolo, S, Herczku, P, Traspas Muiña, A, Sulik, B, Rahul, K K, Kovács, S T S, Hailey, P A, McCullough, R W, Mason, N J & Juhász, Z 2022, ' Ozone Production in Electron Irradiated CO2:O2 Ices ', Physical Chemistry Chemical Physics . < http://adsabs.harvard.edu/abs/2022arXiv220710453M >
Aarhus University
Mifsud, D V, Kaňuchová, Z, Ioppolo, S, Herczku, P, Traspas Muiña, A, Sulik, B, Rahul, K K, Kovács, S T S, Hailey, P A, McCullough, R W, Mason, N J & Juhász, Z 2022, ' Ozone production in electron irradiated CO 2 :O 2 ices ', Physical Chemistry Chemical Physics, no. 30, pp. 18169-18178 . https://doi.org/10.1039/d2cp01535h

The detection of ozone (O3) in the surface ices of Ganymede, Jupiters largest moon, and of the Saturnian moons Rhea and Dione, has motivated several studies on the route of formation of this species. Previous studies have successfully quantified tren

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4ea78579c7331c4bda46604796d8384
http://arxiv.org/abs/2207.10453

The Effect of the Solid Phase Adopted by Astrophysical Ices on their Radiation Chemistry and Physics: Implications for the Synthesis of Prebiotic Molecules

Autor: Duncan Mifsud, Perry Hailey, Péter Herczku, Zoltán Juhász, Sándor Kovács, Béla Sulik, Rahul Kumar Kushwaha, Richard Rácz, Sándor Biri, Sergio Ioppolo, Zuzana Kaňuchová, Béla Paripás, Robert McCullough, Nigel Mason

Publikováno v: Europlanet Science Congress 2022

Laboratory studies of the radiation chemistry occurring in astrophysical ices have sought to better understand the dependence of this chemistry on a number of experimental parameters, such as the temperature of the ice or the energy of the incident r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73fea760a72577d3c6013e303f71b2ef