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Distorted wave theories with correct boundary conditions for double charge exchange in ion-atom collisions at intermediate and high energies. ADVANCES IN QUANTUM CHEMISTRY 2022. [DOI: 10.1016/bs.aiq.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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2
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Bonhommeau DA. A practical law to predict the appearance sizes of multiply charged rare-gas and molecular clusters. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Renzler M, Harnisch M, Daxner M, Kranabetter L, Kuhn M, Scheier P, Echt O. Fission of multiply charged alkali clusters in helium droplets - approaching the Rayleigh limit. Phys Chem Chem Phys 2016; 18:10623-9. [PMID: 27035406 DOI: 10.1039/c6cp00764c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Electron ionization of helium droplets doped with sodium, potassium or cesium results in doubly and, for cesium, triply charged cluster ions. The smallest observable doubly charged clusters are Na9(2+), K11(2+), and Cs9(2+); they are a factor two to three smaller than reported previously. The size of sodium and potassium dications approaches the Rayleigh limit nRay for which the fission barrier is calculated to vanish, i.e. their fissilities are close to 1. Cesium dications are even smaller than nRay, implying that their fissilities have been significantly overestimated. Triply charged cesium clusters as small as Cs19(3+) are observed; they are a factor 2.6 smaller than previously reported. Mechanisms that may be responsible for enhanced formation of clusters with high fissilities are discussed.
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Affiliation(s)
- Michael Renzler
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
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4
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Daly S, Krstić M, Giuliani A, Antoine R, Nahon L, Zavras A, Khairallah GN, Bonačić-Koutecký V, Dugourd P, O'Hair RAJ. Gas-phase VUV photoionisation and photofragmentation of the silver deuteride nanocluster [Ag10D8L6]2+ (L = bis(diphenylphosphino)methane). A joint experimental and theoretical study. Phys Chem Chem Phys 2015; 17:25772-7. [DOI: 10.1039/c5cp01160d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The VUV photoionisation and photofragmentation of a mass-selected, ligated silver deuteride nanocluster was studied.
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Affiliation(s)
- Steven Daly
- Institut Lumière Matière
- Université Claude Bernard Lyon 1
- Lyon
- France
| | - Marjan Krstić
- Center of Excellence for Science and Technology – Integration of Mediterranean region (STIM) at Interdisciplinary Center for Advanced Science and Technology (ICAST)
- University of Split
- Split
- Croatia
| | | | - Rodolphe Antoine
- Institut Lumière Matière
- Université Claude Bernard Lyon 1
- Lyon
- France
| | - Laurent Nahon
- SOLEIL
- l'Orme des Merisiers
- F-91192 Gif sur Yvette
- France
| | - Athanasios Zavras
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- University of Melbourne
- Parkville
- Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
| | - George N. Khairallah
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- University of Melbourne
- Parkville
- Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
| | - Vlasta Bonačić-Koutecký
- Center of Excellence for Science and Technology – Integration of Mediterranean region (STIM) at Interdisciplinary Center for Advanced Science and Technology (ICAST)
- University of Split
- Split
- Croatia
- Humboldt-Universität Berlin
| | - Philippe Dugourd
- Institut Lumière Matière
- Université Claude Bernard Lyon 1
- Lyon
- France
| | - Richard A. J. O'Hair
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- University of Melbourne
- Parkville
- Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
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5
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Trapping of a Conducting Nanoparticle by Long-Range Surface Forces. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2011. [DOI: 10.1380/ejssnt.2011.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Last I, Levy Y, Jortner J. Fragmentation channels of large multicharged clusters. J Chem Phys 2007; 123:154301. [PMID: 16252942 DOI: 10.1063/1.2052567] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
We address unifying features of fragmentation channels driven by long-range Coulomb or pseudo-Coulomb forces in clusters, nuclei, droplets, and optical molasses. We studied the energetics, fragmentation patterns, and dynamics of multicharged (A+)n (n=55, 135, 321) clusters. In Morse clusters the variation of the range of the pair-potential induced changes in the cluster surface energy and in the fissibility parameter X=E(Coulomb)2E(surface). X was varied in the range of X=1-8 for short-range interactions and of X=0.1-1.0 for long-range interactions. Metastable cluster configurations were prepared by vertical ionization of the neutral clusters and by subsequent structural equilibration. The energetics of these metastable ionic clusters was described in terms of the liquid drop model, with the coefficients of the volume and surface energies depending linearly on the Morse band dissociation energy. Molecular-dynamics simulations established two distinct fragmentation patterns of multicharged clusters that involve cluster fission into a small number of large, multicharged clusters for X<1 and Coulomb explosion into a large number of individual ions and small ionic fragments for X>1. The Rayleigh instability limit X=1 separates between spatially anisotropic fission and spatially isotropic Coulomb explosion. Distinct features of the fragmentation energetics and dynamics were unveiled. For fission of n=55 clusters, large kinetic and internal energies of the large fragments are exhibited and the characteristic fragmentation time is approximately 700 fs, while for Coulomb explosion the major energy content of the small fragments involves kinetic energy and the characteristic fragmentation time of approximately 300 fs is shorter. The Rayleigh (X=1) limit, leading to isotropic Coulomb explosion, is transcended by a marked enhancement of the Coulomb energy, which is realized for extremely ionized clusters in ultraintense laser fields, or by a dramatic reduction of the surface energy as is the case for the expansion of optical molasses.
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Affiliation(s)
- Isidore Last
- School of Chemistry, Tel Aviv University, Ramat Aviv, 69978 Tel Aviv, Israel
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7
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Blaisten-Barojas E, Chien CH, Pederson MR, Mirick JW. Fission of doubly ionized calcium clusters. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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de Vries J, Hoekstra R, Morgenstern R, Schlathölter T. Charge driven fragmentation of nucleobases. PHYSICAL REVIEW LETTERS 2003; 91:053401. [PMID: 12906595 DOI: 10.1103/physrevlett.91.053401] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2003] [Indexed: 05/24/2023]
Abstract
We studied multiple ionization of single nucleobases by means of slow highly charged ions (Xe(q+), q=5-25). The products of the subsequent fragmentation were studied using high resolution coincidence time-of-flight spectrometry. We observed a strong dependence of the fragment kinetic energies on the initial charge state of the intermediate parent ions as well as on the initial chemical environment of the respective fragment ions within the parent molecule. The data allow us to shed light on the charge distribution within the molecule as well as on the fragmentation dynamics of these intermediate size systems.
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Affiliation(s)
- J de Vries
- KVI Atomic Physics, Rijksuniversiteit Groningen, Zernikelaan 25, 9747AA Groningen, The Netherlands
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9
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Martin S, Brédy R, Bernard J, Désesquelles J, Chen L. Very fast hollow-atom decay processes in Xe30+-C60 collisions. PHYSICAL REVIEW LETTERS 2002; 89:183401. [PMID: 12398597 DOI: 10.1103/physrevlett.89.183401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2002] [Indexed: 05/24/2023]
Abstract
In Xe30+-C60 collisions at low velocity (0.2 a.u.<v<0.4 a.u.), very fast electron ejection is observed not only for frontal collisions but also for near C60 cage collisions. In frontal collisions, the exit-charge distributions obtained with three projectile velocities are reproduced using a multistep exponential decay model. A mean Auger rate of about 0.4 a.u. is estimated for the decay of hollow atoms during the very short interaction time (<3 fs).
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Affiliation(s)
- S Martin
- Laboratoire de Spectrométrie Ionique et Moléculaire, Université Lyon 1, UMR CNRS 5579, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
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Duft D, Lebius H, Huber BA, Guet C, Leisner T. Shape oscillations and stability of charged microdroplets. PHYSICAL REVIEW LETTERS 2002; 89:084503. [PMID: 12190473 DOI: 10.1103/physrevlett.89.084503] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2002] [Indexed: 05/23/2023]
Abstract
Classical Rayleigh theory predicts an instability of a surface charged liquid sphere, when the Coulomb energy E(C) exceeds twice the surface energy E(S). Previously, electrified liquid droplets have been found to disintegrate at a fissility X=E(C)/2E(S) well below one, however. We determine the stability of charged droplets in an electrodynamic levitator by observing the amplitude and phase of their quadrupolar shape oscillations as a function of the fissility. With this novel approach, which does not rely on an independent determination of the charge and surface tension of the droplets, we are able to confirm for the first time the Rayleigh limit of stability at X=1 for micrometer sized droplets of ethylene glycol.
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Affiliation(s)
- D Duft
- Centre Interdisciplinaire de Recherche Ions Lasers - CEA-CNRS-ISMRA, CIRIL, rue Claude Bloch, BP 5133, F-14070 Caen Cedex 5, France
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11
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Last I, Levy Y, Jortner J. Beyond the Rayleigh instability limit for multicharged finite systems: from fission to Coulomb explosion. Proc Natl Acad Sci U S A 2002; 99:9107-12. [PMID: 12093910 PMCID: PMC123101 DOI: 10.1073/pnas.142253999] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We address the stability of multicharged finite systems driven by Coulomb forces beyond the Rayleigh instability limit. Our exploration of the nuclear dynamics of heavily charged Morse clusters enabled us to vary the range of the pair potential and of the fissibility parameter, which results in distinct fragmentation patterns and in the angular distributions of the fragments. The Rayleigh instability limit separates between nearly binary (or tertiary) spatially unisotropic fission and spatially isotropic Coulomb explosion into a large number of small, ionic fragments. Implications are addressed for a broad spectrum of dynamics in chemical physics, radiation physics of ultracold gases, and biophysics, involving the fission of clusters and droplets, the realization of Coulomb explosion of molecular clusters, the isotropic expansion of optical molasses, and the Coulomb instability of "isolated" proteins.
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Affiliation(s)
- Isidore Last
- School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
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12
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Tappe W, Flesch R, Rühl E, Hoekstra R, Schlathölter T. Charge localization in collision-induced multiple ionization of van der Waals clusters with highly charged ions. PHYSICAL REVIEW LETTERS 2002; 88:143401. [PMID: 11955146 DOI: 10.1103/physrevlett.88.143401] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2001] [Indexed: 05/23/2023]
Abstract
Charge localization in multiple ionization and fragmentation of small argon clusters is reported. The processes are initiated by interaction of the neutral cluster with highly charged Xe(q+) (5< or =q< or =25). Products are detected by means of multicoincidence time-of-flight methods. A strong dependence of the fragmentation pattern on the Xe charge state q is observed. In particular, we find evidence for formation of multiply charged atomic Ar(r+) fragment ions up to r = 7. Such high charge states have neither been observed in fission of multiply charged van der Waals clusters nor in ion-induced fragmentation of fullerenes or metal clusters. This hints at fundamentally different excitation and fragmentation dynamics.
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Affiliation(s)
- W Tappe
- Fachbereich Physik, Universität Osnabrück, Barbarastrasse 7, 49069 Osnabrück, Germany
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13
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Botet R, Płoszajczak M, González JA. Phase transitions in nonextensive spin systems. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2002; 65:015103. [PMID: 11800721 DOI: 10.1103/physreve.65.015103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2001] [Indexed: 05/23/2023]
Abstract
The spherical spin model with infinite-range ferromagnetic interactions is investigated analytically in the framework of nonextensive thermostatics generalizing the Boltzmann-Gibbs statistical mechanics. We show that for repulsive correlations, a weak-ferromagnetic phase develops. There is a tricritical point separating para-, weak-ferro, and ferro regimes. The transition from paramagnetic to weak-ferromagnetic phase is an unusual first-order phase transition in which a discontinuity of the averaged order parameter appears, even for finite number of spins. This result puts in a different way the question of the stability of critical phenomena with respect to the long-ranged correlations.
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Affiliation(s)
- Robert Botet
- Laboratoire de Physique des Solides - CNRS, Bâtiment 510, Université Paris-Sud, Centre d'Orsay, F-91405 Orsay, France
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Chandezon F, Tomita S, Cormier D, Grübling P, Guet C, Lebius H, Pesnelle A, Huber BA. Rayleigh instabilities in multiply charged sodium clusters. PHYSICAL REVIEW LETTERS 2001; 87:153402. [PMID: 11580697 DOI: 10.1103/physrevlett.87.153402] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2001] [Indexed: 05/23/2023]
Abstract
The stability of multiply charged sodium clusters Na(q+)(n) (q< or =10) produced in collisions between neutral clusters and multiply charged ions A(z+) ( z = 1 to 28) is experimentally investigated. Multiply charged clusters are formed within a large range of temperatures and fissilities. They are identified by means of a high-resolution reflectron-type time-of-flight mass spectrometer (m/deltam approximately 14 000). The maximum fissility of stable clusters is obtained for z = 28 and is X approximately 0.85+/-0.07, slightly below the Rayleigh limit (X = 1). It is mainly limited by the initial cluster temperature (T approximately 100 K).
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Affiliation(s)
- F Chandezon
- Département de Recherche Fondamentale sur la Matière Condensée, CEA-Grenoble, 17, rue des Martyrs, F-38054 Grenoble Cedex 9, France.
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15
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Blaise P, Blundell SA, Guet C, Zope RR. Charge-induced fragmentation of sodium clusters. PHYSICAL REVIEW LETTERS 2001; 87:063401. [PMID: 11497828 DOI: 10.1103/physrevlett.87.063401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2001] [Indexed: 05/23/2023]
Abstract
The fission of highly charged sodium clusters with fissilities X>1 is studied by ab initio molecular dynamics. Na4+24 is found to undergo predominantly sequential Na+3 emission on a time scale of 1 ps, while Na(Q+)(24) ( 5< or =Q< or =8) undergoes multifragmentation on a time scale > or =0.1 ps, with Na+ increasingly the dominant fragment as Q increases. All singly charged fragments Na(+)(n) up to size n = 6 are observed. The observed fragment spectrum is, within statistical error, independent of the temperature T of the parent cluster for T< or =1500 K. These findings are consistent with and explain recent trends observed experimentally.
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Affiliation(s)
- P Blaise
- Département de Recherche Fondamentale sur la Matière Condensée, CEA-Grenoble, 17, rue des Martyrs, F-38054 Grenoble CEDEX 9, France
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16
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Decay pathway determination of even-size dicationic silver clusters: Ag162+ and Ag182+ revisited by pre-precursor selection and sequential decay. Chem Phys 2000. [DOI: 10.1016/s0301-0104(00)00213-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Barat M, Brenot JC, Dunet H, Fayeton JA, Picard YJ. Collision induced fragmentation of small ionic sodium clusters: Competition between electronic and impulsive mechanisms. J Chem Phys 1999. [DOI: 10.1063/1.479019] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Li Y, Blaisten-Barojas E, Papaconstantopoulos D. Molecular dynamics study of neutral and multiply charged sodium clusters. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00208-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Schweikhard L, Beiersdorfer P, Bell W, Dietrich G, Krückeberg S, Lützenkirchen K, Obst B, Ziegler J. Production and investigation of multiply charged metal clusters in a Penning trap. ACTA ACUST UNITED AC 1996. [DOI: 10.1007/bf02274913] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Montag B, Reinhard P. Symmetric and asymmetric fission of metal clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:16365-16368. [PMID: 9981031 DOI: 10.1103/physrevb.52.16365] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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