GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • 2015-2019  (37)
  • 2005-2009  (26)
Schlagwörter
Sprache
Erscheinungszeitraum
Jahr
  • 1
    Online-Ressource
    Online-Ressource
    Cham :Springer International Publishing AG,
    Schlagwort(e): Polarization (Nuclear physics). ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (414 pages)
    Ausgabe: 2nd ed.
    ISBN: 9783319552163
    Serie: Springer Series on Atomic, Optical, and Plasma Physics Series ; v.96
    DDC: 539.757
    Sprache: Englisch
    Anmerkung: Intro -- Foreword to the Second Edition -- Foreword to the First Edition -- Preface to the Second Edition -- Preface to the First Edition -- Acknowledgements -- Contents -- Notation -- Basic Concepts -- 1 Introduction -- 1.1 Motivation -- 1.2 Historical Perspective -- 1.3 Modern Approaches -- References -- 2 Polarized Light -- 2.1 Polarization of Coherent Electromagnetic Radiation -- 2.1.1 Maxwell's Theory of Electromagnetic Radiation -- 2.1.2 The Polarization Ellipse -- 2.1.3 Parameterization of Polarization: Stokes Vectors -- 2.1.4 The Principal Frame -- 2.1.5 The Poincaré Sphere -- 2.2 Electric Dipole Radiation from Atomic Transitions -- 2.2.1 Coordinate Frames, Scattering Amplitudes, and Stokes Parameters -- 2.2.2 Atomic State Parameters, Electron Charge Clouds, and Their Experimental Determination -- 2.2.3 The Incoherent Case with Conservation of Atomic Reflection Symmetry -- 2.2.4 The Incoherent Case Without Conservation of Atomic Reflection Symmetry -- 2.2.5 Summary of Parameterization for P-State Excitation -- 2.2.6 Extension to Coherently Excited Stark Manifolds -- References -- 3 Polarized Electrons -- 3.1 The Dirac Equation -- 3.2 Pure Spin States: State Vector Description -- 3.3 Mixed Spin States: Density Matrix Description -- 3.4 Experimental Determination of Electron Polarization -- References -- 4 Experimental Geometries and Approaches -- 4.1 Integrated Cross Sections and Alignment -- 4.1.1 Schematic Setup for Angle-Integrated Measurements -- 4.1.2 Setups with Results for Electron Impact and Atom Impact Excitation -- 4.2 Differential Cross Sections -- 4.2.1 Schematic Setups for Angle-Differential Measurements -- 4.2.2 A Setup with Results for Electron--Atom Collisions -- 4.2.3 The Magnetic Angle Changer -- 4.2.4 Setups with Results for Electron Impact Ionization -- 4.2.5 A Setup with Results for Atom Impact Excitation. , 4.3 Planar Scattering Symmetry: Alignment and Orientation Parameters -- 4.3.1 Schematic Setups for Coherence and Correlation Analysis -- 4.3.2 Setups with Results for Electron Impact Excitation and De-excitation -- 4.3.3 Setups with Results for Atom Impact Excitation -- 4.4 Generalized STU Parameters for Electron Collisions -- 4.5 Generalized Stokes Parameters for Electron--Atom Collisions -- 4.6 Atom--Atom Collisions with Laser-Prepared Targets -- References -- 5 Density Matrices: Connection Between Experiment and Theory -- 5.1 Motivation -- 5.2 Scattering Amplitudes -- 5.2.1 Scattering Amplitudes in Different Coordinate Frames -- 5.2.2 Symmetry Properties -- 5.2.3 Scattering Amplitudes in the Non-relativistic Limit -- 5.3 Density Matrices -- 5.4 An Explicit Example: Generalized STU Parameters -- 5.4.1 Definition in Terms of Scattering Amplitudes -- 5.4.2 Exact Symmetry Relationships -- 5.4.3 An Approximate Symmetry: The Fine-Structure Effect -- 5.5 Irreducible Tensor Operators and State Multipoles -- 5.5.1 Basic Definitions -- 5.5.2 Coupled Systems -- 5.5.3 Time Evolution of State Multipoles: Quantum Beats -- 5.5.4 Time Integration over Quantum Beats -- 5.6 Stokes Parameters -- 5.7 Atomic and Photon Density Matrices for P-State Excitation -- References -- 6 Computational Methods -- 6.1 Electron Versus Heavy-Particle Impact -- 6.2 Computational Methods for Electron Scattering -- 6.2.1 Potential Scattering -- 6.2.2 Perturbation Approaches -- 6.2.3 The Close-Coupling Expansion -- 6.2.4 Time-Dependent Approaches -- 6.2.5 Recent Developments -- 6.3 Computational Methods for Heavy-Particle Collisions -- 6.3.1 Semi-classical Approaches -- 6.3.2 Classical-Trajectory Monte-Carlo Approach -- 6.4 Visualization of Charge Clouds -- References -- Case Studies -- 7 Electron Impact Excitation -- 7.1 Angle-Integrated Stokes Parameters and Cross Sections. , 7.1.1 Excitation of the (6s6p) States in Hg -- 7.1.2 Excitation of Ions: Cd+(2P3/2) -- 7.1.3 An Unresolved Mystery: Electron Impact Excitation of (4s5s)3S1 in Zn and (6s7s)3S1 in Hg -- 7.2 Angle-Differential Stokes and STU Parameters -- 7.2.1 Electron Impact Excitation of Helium -- 7.2.2 Electron Impact Excitation of Hydrogen, Lithium, and Sodium -- 7.2.3 Electron Impact Excitation of Heavy Noble Gases -- 7.2.4 Electron Impact Excitation of Mercury -- 7.2.5 Elastic Electron Scattering from Cesium -- 7.2.6 Recent Developments in Electron Scattering from Cesium -- 7.3 Conclusions -- References -- 8 Ion and Atom Impact Excitation -- 8.1 Angle-Differential S rightarrow P, D Excitation and Transfer -- 8.1.1 S rightarrow P, D Excitation in Mg+- and Li-Rare-Gas Systems -- 8.1.2 S rightarrow P Transfer Excitation in B3+-He, Ne Collisions -- 8.1.3 S rightarrow P Transfer in Small-Angle H+, Li+-Na(3s) Collisions -- 8.1.4 Vortex Formation in Antiproton-Atomic-Hydrogen Collisions -- 8.2 Angle-Integrated Alignment Studies Using Optically Prepared Targets -- 8.2.1 Alignment Effects in H+, Li+-Na(3p) Collisions -- 8.2.2 Alignment Effects in He2+-Na(3p) Collisions -- 8.3 Angle-Differential Studies Using Optically Prepared Targets -- 8.3.1 Level Populations in H+-Na(3p)rightarrowH(n=2,3)-Na+ Scattering -- 8.3.2 Level Populations in Li+-Na(3p)rightarrowLi(2p)-Na+ Scattering -- 8.3.3 Level Populations in He+ - Na(3p)rightarrowHe(2p)-Na+ Scattering -- 8.4 Angle-Differential Studies Using Optically Prepared -- 8.4.1 H+-Na(3p)rightarrowH (2p)-Na+ Scattering Experiments -- 8.4.2 Li+-Na(3p)rightarrowLi(2p)--Na+ Scattering Experiments -- 8.5 Reaction Microscope Studies: COLTRIMS with Alkali MOTs -- 8.5.1 Li+ Capture from a Na (3s, 3p) MOT -- 8.5.2 Na+ Capture from a Rb (5p) MOT -- References -- 9 Propensity Rules. , 9.1 Orientation for S to P Impact Excitation by Electrons and Positrons -- 9.2 Orientation for S to P Impact Excitation by Protons and Antiprotons -- 9.3 Orientation for Excitation and De-Excitation by Electrons and Positrons -- 9.4 Principal Quantum Number Dependence of Orientation and Alignment Parameters -- 9.5 Spin-Dependent Propensities -- 9.6 Validity Limits of Propensity Rules -- 9.6.1 Electron Impact Excitation of Neon -- 9.6.2 Electron Impact Excitation of He(1s3d)1D -- References -- 10 Impact Ionization -- 10.1 Ionization by Electron Impact -- 10.1.1 Angle-Integrated Studies -- 10.1.2 Angle-Differential Studies -- 10.1.3 Selected Developments Since 2001 -- 10.2 Ionization by Heavy-Particle Impact: Reaction Microscope Studies with Optically Prepared Targets -- 10.3 Ionization with Excitation by Heavy-Particle Impact -- 10.3.1 Angle-Integrated Studies -- 10.3.2 Angle-Differential Studies -- References -- 11 Photo-Driven Processes -- 11.1 Introductory Remarks -- 11.2 Photoionization by Continuous Radiation -- 11.3 Photoionization by Short-Pulse Radiation -- References -- 12 Related Topics and Applications -- 12.1 Spin-Polarized Auger Electrons -- 12.2 Autoionization Anisotropies in Heavy-Particle Collisions -- 12.3 Collisions with Molecules -- 12.3.1 Electron Collisions with Molecules -- 12.3.2 Heavy-Particle Collisions with Molecules -- 12.4 Collisions with Surfaces and Foils -- 12.5 Polarization in Collisional Broadening and Redistribution -- 12.6 Alignment and Orientation Studies at Thermal Energies -- 12.6.1 Alignment Studies Involving an Optically Prepared Atom -- 12.6.2 Alignment and Orientation Studies Involving Two Optically Prepared Atoms -- 12.7 Plasma Polarization Spectroscopy -- 12.8 Spin-Polarized Beams for Nuclear and Particle Physics -- 12.9 Quantum Entanglement and Bell Correlation in Electron-Exchange Collisions. , References -- Selection of Historical Papers (1925-1976) -- 13 Introductory Summaries -- Appendix Further Readings -- Index.
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    In: Marine micropaleontology, New York, NY [u.a.] : Elsevier, 1976, 66(2008), 3/4, Seite 208-221
    In: volume:66
    In: year:2008
    In: number:3/4
    In: pages:208-221
    Materialart: Online-Ressource
    Seiten: Ill., graph. Darst
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    In: Geology, Melville, NY : American Institute of Physics, 1973, 37(2009), 9, Seite 811-814, 1943-2682
    In: volume:37
    In: year:2009
    In: number:9
    In: pages:811-814
    Materialart: Online-Ressource
    Seiten: graph. Darst
    ISSN: 1943-2682
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Publikationsdatum: 2019-09-23
    Beschreibung: Highlights • Stratigraphic framework over the Miocene-Pliocene boundary at IODP Site U1387. • Abrupt sedimentary changes over the Miocene-Pliocene boundary. • Clear hints for onset of Mediterranean Outflow after the Messinian Salinity Crisis. • Evidence of bottom water currents in contouritic sedimentation and elevated Zr/Al. • Quiet, hemipelagic sediment deposition during the Messinian in the Gulf of Cadiz. Abstract Integrated Ocean Drilling Program (IODP) Expedition 339 cored multiple sites in the Gulf of Cadiz in order to study contourite deposition resulting from Mediterranean Outflow water (MOW). One hole, U1387C, was cored to a depth of 865.6 meters below seafloor (mbsf) with the goal of recovering the Latest Miocene to Pliocene transition in order to evaluate the history of MOW immediately after the end of the Messinian Salinity Crisis. To understand this history, an accurate age model for the succession is needed, but is challenging to construct, because the Miocene-Pliocene boundary is not marked by a clear biostratigraphic event in the Atlantic and coring gaps occur within the recovered stratigraphic record. These limitations are overcome by combining a variety of chronostratigraphic datasets to construct an age-model that fits the currently available age indicators and demonstrates that coring in Hole U1387C did indeed recover the Miocene-Pliocene boundary at around 826 mbsf. This boundary is associated with a distinct and abrupt change in depositional environment. During the latest Messinian, hemipelagic sediments exhibiting precession-induced climate variability were deposited. These are overlain by Pliocene sediments deposited at a much higher sedimentation rate, with much higher and more variable XRF-scanning Zr/Al ratios than the underlying sediment, and that show evidence of winnowing, particle sorting and increasing grain size, which we interpret to be related to the increasing flow of MOW. Pliocene sedimentary cyclicity is clearly visible in both the benthic δ18O record and the Zr/Al data and is probably also precessionally controlled. Two contouritic bigradational sandy-beds are revealed above the third sedimentary cycle of the Pliocene. On the basis of these results, we conclude that sedimentation associated with weak Mediterranean-Atlantic exchange, began in the Gulf of Cadiz virtually at or shortly after the Miocene-Pliocene boundary.
    Materialart: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Publikationsdatum: 2021-04-21
    Beschreibung: The stable carbon isotope composition of dissolved inorganic carbon (δ13C-DIC) can be used to quantify fluxes within the carbon system. For example, knowing the δ13C signature of the inorganic carbon pool can help in describing the amount of anthropogenic carbon in the water column. The measurements can also be used for evaluating modeled carbon fluxes, for making basin-wide estimates of anthropogenic carbon, and for studying seasonal and interannual variability or decadal trends in interior ocean biogeochemistry. For all these purposes, it is not only important to have a sufficient amount of data, but these data must also be internally consistent and of high quality. In this study, we present a δ13C-DIC dataset for the North Atlantic which has undergone secondary quality control. The data originate from oceanographic research cruises between 1981 and 2014. During a primary quality control step based on simple range tests, obviously bad data were flagged. In a second quality control step, biases between measurements from different cruises were quantified through a crossover analysis using nearby data of the respective cruises, and values of biased cruises were adjusted in the data product. The crossover analysis was possible for 24 of the 32 cruises in our dataset, and adjustments were applied to 11 cruises. The internal accuracy of this dataset is 0.017 ‰.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 6
    facet.materialart.
    Unbekannt
    In:  [Other] In: 3. International Symposium on Deep-Water Corals, 28.11.-02.12.2005, Miamia, Florida, USA .
    Publikationsdatum: 2020-10-19
    Materialart: Conference or Workshop Item , NonPeerReviewed
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 7
    facet.materialart.
    Unbekannt
    In:  [Talk] In: Statusseminar 2007 Meeresforschung mit FS SONNE, 14.02.-15.02.2007, Kiel . Statusseminar 2007 Meeresforschung mit FS SONNE : Tagungsband ; pp. 119-122 .
    Publikationsdatum: 2012-02-23
    Materialart: Conference or Workshop Item , NonPeerReviewed
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 8
    facet.materialart.
    Unbekannt
    In:  [Talk] In: PAGES-IMAGES-NSF Workshop, 30.05.-2.6, Trins, Austria .
    Publikationsdatum: 2019-09-23
    Materialart: Conference or Workshop Item , NonPeerReviewed
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 9
    Publikationsdatum: 2019-09-23
    Materialart: Conference or Workshop Item , NonPeerReviewed
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 10
    facet.materialart.
    Unbekannt
    AGU (American Geophysical Union)
    In:  Geophysical Research Letters, 34 . L24702.
    Publikationsdatum: 2018-02-15
    Beschreibung: A Holocene Gulf of Guinea record of riverine runoff, based on Ba/Ca in tests of a shallow-dwelling planktic foraminifer, and sea surface temperature (SST), based on Mg/Ca, reveals centennial-scale instabilities in West African monsoon (WAM) precipitation and eastern equatorial Atlantic (EEA) thermal conditions. The long-term Holocene climate trend is characterized by a warm and wet early-mid Holocene and gradual drying and cooling during the late Holocene. Superimposed on this trend are numerous centennial scale drops in precipitation during the early-mid Holocene. The greatest declines in early Holocene monsoon precipitation were accompanied by significant SST cooling in the EEA and correlate with drops in air temperature over Greenland and fresh water outbursts into the North Atlantic (NA). This observation suggests that early Holocene climate instabilities in the NA were closely linked to changes in the WAM. The strong imprint of NA events in summer monsoon precipitation suggests that these events were not confined to winter-time. The late Holocene does not show large amplitude changes in riverine runoff at the centennial level. The relatively stable late Holocene conditions likely reflect a weakening and stabilization of the monsoon system, probably due to diminished influence of the NA region due to a reduction in ice sheet.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...