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1

Schriftenreihen ausleihbar

Geology of the Red Devil quicksilver mine, Alaska (1963)

MacKevett, E. M. ; Berg, H. C.

Washington, DC : United States Gov. Print. Off.

Dazugehörige Bände

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Signatur: SR 90.0001(1142-G)

In: U.S. Geological Survey bulletin

Materialart: Schriftenreihen ausleihbar

Seiten: III, G-16 S. + 7 pl.

Serie: U.S. Geological Survey bulletin 1142-G

Sprache: Englisch

Standort: Kompaktmagazin unten

Zweigbibliothek: GFZ Bibliothek

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Reconnaissance geology of northern Baranof Island, Alaska (1963)

Berg, H. C. ; Hinckley, D. W.

Washington, DC : United States Gov. Print. Off.

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Signatur: SR 90.0001(1141-O)

In: U.S. Geological Survey bulletin

Materialart: Schriftenreihen ausleihbar

Seiten: III, O-24 S. + 1 pl.

Serie: U.S. Geological Survey bulletin 1141-O

Sprache: Englisch

Standort: Kompaktmagazin unten

Zweigbibliothek: GFZ Bibliothek

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3

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Structure and Stability of the Negative Hydrogen Molecular Ion (2011)

B. Jordon-Thaden, H. Kreckel, R. Golser, D. Schwalm, M. H. Berg, H. Buhr, H. Gnaser, M. Grieser, O. Heber, M. Lange, O. Novotný, S. Novotny, H. B. Pedersen, A. Petrignani, R. Repnow, H. Rubinstein, D. Shafir, A. Wolf, and D. Zajfman

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2011-11-04

Beschreibung: Author(s): B. Jordon-Thaden, H. Kreckel, R. Golser, D. Schwalm, M. H. Berg, H. Buhr, H. Gnaser, M. Grieser, O. Heber, M. Lange, O. Novotný, S. Novotny, H. B. Pedersen, A. Petrignani, R. Repnow, H. Rubinstein, D. Shafir, A. Wolf, and D. Zajfman [Phys. Rev. Lett. 107, 193003] Published Thu Nov 03, 2011

Schlagwort(e): Atomic, Molecular, and Optical Physics

Print ISSN: 0031-9007

Digitale ISSN: 1079-7114

Thema: Physik

Publiziert von American Physical Society (APS)

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Titanium dioxide/silicon hole-blocking selective contact to enable double-heterojunction crystalline silicon-based solar cell (2015)

Ken A. Nagamatsu, Sushobhan Avasthi, Girija Sahasrabudhe, Gabriel Man, Janam Jhaveri, Alexander H. Berg, Jeffrey Schwartz, Antoine Kahn, Sigurd Wagner and James C. Sturm

American Institute of Physics (AIP)

In: Applied Physics Letters

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Publikationsdatum: 2015-03-27

Beschreibung: In this work, we use an electron-selective titanium dioxide (TiO 2 ) heterojunction contact to silicon to block minority carrier holes in the silicon from recombining at the cathode contact of a silicon-based photovoltaic device. We present four pieces of evidence demonstrating the beneficial effect of adding the TiO 2 hole-blocking layer: reduced dark current, increased open circuit voltage (V OC ), increased quantum efficiency at longer wavelengths, and increased stored minority carrier charge under forward bias. The importance of a low rate of recombination of minority carriers at the Si/TiO 2 interface for effective blocking of minority carriers is quantitatively described. The anode is made of a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) heterojunction to silicon which forms a hole selective contact, so that the entire device is made at a maximum temperature of 100 °C, with no doping gradients or junctions in the silicon. A low rate of recombination of minority carriers at the Si/TiO 2 interface is crucial for effective blocking of minority carriers. Such a pair of complementary carrier-selective heterojunctions offers a path towards high-efficiency silicon solar cells using relatively simple and near-room temperature fabrication techniques.

Print ISSN: 0003-6951

Digitale ISSN: 1077-3118

Thema: Physik

Publiziert von American Institute of Physics (AIP)

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Resonant structure of low-energy H_{3}^{+} dissociative recombination (2011)

Annemieke Petrignani, Simon Altevogt, Max H. Berg, Dennis Bing, Manfred Grieser, Jens Hoffmann, Brandon Jordon-Thaden, Claude Krantz, Mario B. Mendes, Oldřich Novotný, Steffen Novotny, Dmitry A. Orlov, Roland Repnow, Tobias Sorg, Julia Stützel, Andreas Wolf, Henrik Buhr, Holger Kreckel, Viatcheslav Kokoouline, and Chris H. Greene

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-03-17

Beschreibung: Author(s): Annemieke Petrignani, Simon Altevogt, Max H. Berg, Dennis Bing, Manfred Grieser, Jens Hoffmann, Brandon Jordon-Thaden, Claude Krantz, Mario B. Mendes, Oldřich Novotný, Steffen Novotny, Dmitry A. Orlov, Roland Repnow, Tobias Sorg, Julia Stützel, Andreas Wolf, Henrik Buhr, Holger Kreckel, Viatcheslav Kokoouline, and Chris H. Greene High-resolution dissociative recombination rate coefficients of rotationally cool and hot H_{3}^{+} in the vibrational ground state have been measured with a 22-pole trap setup and a Penning ion source, respectively, at the ion storage-ring TSR. The experimental results are compared with theoretical... [Phys. Rev. A 83, 032711] Published Wed Mar 16, 2011

Schlagwort(e): Atomic and molecular collisions and interactions

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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Publisher’s Note: Resonant structure of low-energy H_{3}^{+} dissociative recombination [Phys. Rev. A 83, 032711 (2011)] (2011)

Annemieke Petrignani, Simon Altevogt, Max H. Berg, Dennis Bing, Manfred Grieser, Jens Hoffmann, Brandon Jordon-Thaden, Claude Krantz, Mario B. Mendes, Oldřich Novotný, Steffen Novotny, Dmitry A. Orlov, Roland Repnow, Tobias Sorg, Julia Stützel, Andreas Wolf, Henrik Buhr, Holger Kreckel, Viatcheslav Kokoouline, and Chris H. Greene

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-04-28

Beschreibung: Author(s): Annemieke Petrignani, Simon Altevogt, Max H. Berg, Dennis Bing, Manfred Grieser, Jens Hoffmann, Brandon Jordon-Thaden, Claude Krantz, Mario B. Mendes, Oldřich Novotný, Steffen Novotny, Dmitry A. Orlov, Roland Repnow, Tobias Sorg, Julia Stützel, Andreas Wolf, Henrik Buhr, Holger Kreckel, Viatcheslav Kokoouline, and Chris H. Greene [Phys. Rev. A 83, 049906] Published Wed Apr 27, 2011

Schlagwort(e): Errata

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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7

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Communication: Visible line intensities of the triatomic hydrogen ion from experiment and theory (2014)

Annemieke Petrignani, Max H. Berg, Florian Grussie, Andreas Wolf, Irina I. Mizus, Oleg L. Polyansky, Jonathan Tennyson, Nikolai F. Zobov, Michele Pavanello and Ludwik Adamowicz

American Institute of Physics (AIP)

In: Journal of Chemical Physics

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Publikationsdatum: 2014-12-23

Beschreibung: The visible spectrum of H 3 + is studied using high-sensitivity action spectroscopy in a cryogenic radiofrequency multipole trap. Advances are made to measure the weak ro-vibrational transitions from the lowest rotational states of H 3 + up to high excitation energies providing visible line intensities and, after normalisation to an infrared calibration line, the corresponding Einstein B coefficients. Ab initio predictions for the Einstein B coefficients are obtained from a highly precise dipole moment surface of H 3 + and found to be in excellent agreement, even in the region where states have been classified as chaotic.

Print ISSN: 0021-9606

Digitale ISSN: 1089-7690

Thema: Chemie und Pharmazie , Physik

Publiziert von American Institute of Physics (AIP)

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Bioaccumulation of Selected PCBs in Zebrafish, Three-Spined Stickleback, and Arctic Char After Three Different Routes of Exposure (2001)

L. Andersson, A. H. Berg, R. Bjerse, P.

Springer

In: Archives of Environmental Contamination and Toxicology. 2001; 40(4): 519-530. Published 2001 Apr 01. doi: 10.1007/s002440010205.

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Publikationsdatum: 2001-04-01

Print ISSN: 0090-4341

Digitale ISSN: 1432-0703

Thema: Energietechnik , Medizin

Publiziert von Springer

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9

Digitale Medien

The thermal conductivity of ethane in the critical region (1990)

Mostert, R. ; van den Berg, H. R. ; van der Gulik, P. S. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 92 (1990), S. 5454-5462

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: New experimental data are presented for the thermal conductivity of ethane. The thermal conductivity has been measured with a parallel-plate method as a function of temperature along eleven different isochores so as to obtain detailed information on the enhancement of the thermal conductivity in the critical region. The experimental results appear to be consistent with a recently proposed theoretical equation that accounts for both the asymptotic and nonasymptotic critical behavior of the thermal conductivity of fluids.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.458523

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10

Digitale Medien

The micromagnetics of periodic arrays of defects in trilayers with interlayer exchange coupling (abstract) : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)

van den Berg, H. A. M.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 76 (1994), S. 6559-6559

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: A significant loss in the giant magnetoresistive signal of magnetic stacks with antiferromagnetic coupling across nonmagnetic intermediate layers is caused by regions with a ferro- rather than an antiferromagnetic coupling. The impact of these ferromagnetic coupling regions extends itself into the lateral direction due to the bulk exchange coupling. The present micromagnetic model provides a tool by which a detailed quantitative evaluation of the impact of periodic arrays of parallel line defects is possible. These defects have deviating exchange-coupling constants, and/or anisotropy constants or directions, bulk exchange constants, saturation magnetization, etc., in specific regions. Previously, we developed a phenomenological model of trilayers with two magnetic films separated by a nonmagnetic interlayer that contains one such defect. This model, with a relatively small number of free parameters, allows one to trace complete hysteresis curves. A large number of mode branches reveal themselves and jumpwise transitions between these modes frequently occur along the hysteresis loops. The present micromagnetic model requires a sufficiently accurate assessment of the starting magnetization configuration in order to get a convergence of the code. In general, the micromagnetic code is not capable of overcoming the above irreversible mode conversions. The mode branches evaluated by the phenomenological model are applied to provide the micromagnetic model with appropriate starting configurations after meeting a situation of nonstability.The micromagnetic theory of Brown constitutes the basis of the present approach. The micromagnetic effective field is calculated at grid points and the torque exerted by it on the magnetic dipole is made zero at each grid side by an iteration scheme. The long ranging magnetostatic fields are given by convolution integrals and are evaluated in the Fourier space by using two-dimensional fast Fourier transforms. The single defect is micromagnetically studied by zero padding techniques. Depending on the course of the external field, two different wall regions reveal themselves, to wit, the wall core and the so-called Néel tails. These tails were not incorporated into the phenomenological model. Provided that the defects are sufficiently wide spaced, the agreement between both models is rather good in the core regions. The impact on the GMR signal, in particular of the Néel tails, will be discussed with emphasis on systems with weak interlayer coupling, e.g., the decoupled systems.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.358191

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