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Spallino L, Angelucci M, Pasqualetti A, Battes K, Day C, Grohmann S, Majorana E, Ricci F, Cimino R. Cryogenic vacuum considerations for future gravitational wave detectors. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.104.062001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dupuy R, Bertin M, Féraud G, Michaut X, Marie-Jeanne P, Jeseck P, Philippe L, Baglin V, Cimino R, Romanzin C, Fillion JH. Mechanism of Indirect Photon-Induced Desorption at the Water Ice Surface. PHYSICAL REVIEW LETTERS 2021; 126:156001. [PMID: 33929258 DOI: 10.1103/physrevlett.126.156001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Electronic excitations near the surface of water ice lead to the desorption of adsorbed molecules, through a so far debated mechanism. A systematic study of photon-induced indirect desorption, revealed by the spectral dependence of the desorption (7-13 eV), is conducted for Ar, Kr, N_{2}, and CO adsorbed on H_{2}O or D_{2}O amorphous ices. The mass and isotopic dependence and the increase of intrinsic desorption efficiency with photon energy all point to a mechanism of desorption induced by collisions between adsorbates and energetic H/D atoms, produced by photodissociation of water. This constitutes a direct and unambiguous experimental demonstration of the mechanism of indirect desorption of weakly adsorbed species on water ice, and sheds new light on the possibility of this mechanism in other systems. It also has implications for the description of photon-induced desorption in astrochemical models.
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Affiliation(s)
- R Dupuy
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - M Bertin
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - G Féraud
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - X Michaut
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - P Marie-Jeanne
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - P Jeseck
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - L Philippe
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - V Baglin
- CERN, CH-1211 Geneva 23, Switzerland
| | - R Cimino
- Laboratori Nazionali di Frascati (LNF)-INFN, I-00044 Frascati, Italy
| | - C Romanzin
- Laboratoire de Chimie Physique, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
| | - J-H Fillion
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
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Petrik NG, Kimmel GA. Electron-stimulated reactions in nanoscale water films adsorbed on α-Al2O3(0001). Phys Chem Chem Phys 2018; 20:11634-11642. [DOI: 10.1039/c8cp01284a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
100 eV electrons are stopped in the H2O portion of the isotopically-layered nanoscale film on α-Al2O3(0001) but D2 is produced at the D2O/alumina interface by mobile electronic excitations and/or hydronium ions.
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Affiliation(s)
- Nikolay G. Petrik
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Greg A. Kimmel
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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