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All papers authored by Natalie Hell

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2020 Steffen Kühn

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, José R. Crespo López-Urrutia

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, Keisuke Fujii

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, René Steinbrügge

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, Jakob Stierhof

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, Moto Togawa, Zoltán Harman, Natalia S. Oreshkina

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, Charles Cheung

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, Mikhail G. Kozlov

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, Sergey G. Porsev

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, Marianna S. Safronova, Julian C. Berengut

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, Michael Rosner

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and 17 other authors

High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem

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Randall Smith

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, Michael Hahn, John Raymond, T. Kallman, C. P. Ballance, Vanessa Polito, Giulio Del Zanna, Liyi Gu, Natalie Hell

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, Renata Cumbee, Gabriele Betancourt-Martinez, Elisa Costantini, Lia Corrales

Roadmap on cosmic EUV and x-ray spectroscopy

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This paper was not found in any repository, but could be made available legally by the author.

This paper was not found in any repository, but could be made available legally by the author.

P. Beiersdorfer, N. Hell

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, D. Panchenko, G. V. Brown, E. Träbert, R. L. Kelley, C. A. Kilbourne, F. S. Porter

Transition energy measurements of the X-ray lines of neon-like europium

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Thusitha Arthanayaka, Peter Beiersdorfer

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, Gregory V. Brown

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, Ming Feng Gu, Michael Hahn

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, Natalie Hell

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, Tom Lockard, Daniel W. Savin

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Laboratory Calibrations of Fe xii–xiv Line-intensity Ratios for Electron Density Diagnostics

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2019 Natalie Hell

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, Peter Beiersdorfer

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, Gregory V. Brown, Megan E. Eckart, Richard L. Kelley, Caroline A. Kilbourne, Maurice A. Leutenegger, Thomas E. Lockard, F. Scott Porter, Jörn Wilms

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Highly charged ions in a new era of high resolution X‐ray astrophysics

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P. Beiersdorfer

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, G. V. Brown, N. Hell

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, T. Lockard, J. Nilsen, D. Panchenko, L. M. R. Hobbs, D. J. Hoarty, M. F. Gu

Measurements and calculations of 2s−2p transitions in neonlike germanium: Achieving agreement at the 10−4 level

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E. E. Petkov

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, A. S. Safronova, V. L. Kantsyrev, A. Stafford, U. I. Safronova, V. V. Shlyaptseva, P. Beiersdorfer, N. Hell

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, G. V. Brown

Polarization measurements of Ne-like Mo32+ x-ray lines excited by an electron beam

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Elmar Träbert

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, Peter Beiersdorfer

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, Gregory V. Brown, Natalie Hell

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, Joel H. T. Clementson

EUV spectra of europium—Chasing for spectral lines of P‐ to Ar‐like ions

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Peter Beiersdorfer

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, Natalie Hell

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, Dmytro Panchenko, Greg V. Brown, Elmar Träbert

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, Richard L. Kelley, Caroline A. Kilbourne, F. Scott Porter

Measurements of L‐shell X‐ray emission lines of neonlike europium on an electron beam ion trap

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Maria Hirsch, Natalie Hell

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, Victoria Grinberg

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, Ralf Ballhausen, Michael A. Nowak, Katja Pottschmidt, Norbert S. Schulz, Thomas Dauser, Manfred Hanke, Timothy R. Kallman, Gregory V. Brown, Jörn Wilms

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Chandra X-ray spectroscopy of the focused wind in the Cygnus X-1 system

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2018 Esra Bulbul, Adam Foster

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, Gregory V. Brown, Mark W. Bautz, Peter Beiersdorfer

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, Natalie Hell

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, Caroline Kilbourne, Ralph Kraft

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, Richard Kelley, Maurice A. Leutenegger, Eric D. Miller, F. Scott Porter, Randall K. Smith

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Laboratory Measurements of X-Ray Emission from Highly Charged Argon Ions

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G. L. Betancourt-Martinez, P. Beiersdorfer

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, G. V. Brown, R. S. Cumbee

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, N. Hell

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, R. L. Kelley, C. A. Kilbourne, M. A. Leutenegger, T. E. Lockard, F. S. Porter

High-resolution Charge Exchange Spectra with L-shell Nickel Show Striking Differences from Models

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T. E. Lockard, E. W. Magee, D. A. Layne, M. A. Leutenegger, M. E. Eckart

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, N. Hell

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, G. V. Brown, P. Beiersdorfer

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The Warm Electron Beam Ion Trap (WEBIT): An instrument for ground calibration of space-borne x-ray spectrometers

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N. Hell

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, T. Lockard, P. Beiersdorfer

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, E. W. Magee, G. V. Brown, R. Shepherd, T. Arthanayaka

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Experimental comparison of spherically bent HAPG and Ge crystals

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P. Beiersdorfer

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, E. W. Magee, G. V. Brown, N. Hell

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, A. McKelvey, R. Shepherd, D. J. Hoarty, C. R. D. Brown, M. P. Hill

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, L. M. R. Hobbs

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, S. F. James, L. Wilson

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High resolution, high signal-to-noise crystal spectrometer for measurements of line shifts in high-density plasmas

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This paper was not found in any repository, but could be made available legally by the author.

T. P. Arthanayaka

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, P. Beiersdorfer

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, G. V. Brown, M. Hahn, N. Hell

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, T. E. Lockard, D. W. Savin

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Measurements of the effective electron density in an electron beam ion trap using extreme ultraviolet spectra and optical imaging

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This paper was not found in any repository, but could be made available legally by the author.

P. Beiersdorfer

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, N. Hell

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, J. K. Lepson

Temperature Measurements Using the Dielectronic Satellite Lines of Fe xvii

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Hironori Maejima, Lorella Angelini, Elisa Costantini, Mark R. Edison, Jan-Willem den Herder, Yoshitaka Ishisaki, Kyoko Matsushita, Koji Mori, Matteo Guainazzi, Richard L. Kelley, Kenichi Toda, Lillian S. Reichenthal, James V. Lobell, Robert Petre, Ryuichi Fujimoto and 165 other authors

Concept of the X-ray Astronomy Recovery Mission

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Hitomi Collaboration Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steven W. Allen, Lorella Angelini, Marc Audard

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, Hisamitsu Awaki, Magnus Axelsson, Aya Bamba, Marshall W. Bautz, Roger Blandford, Laura W. Brenneman, Gregory V. Brown, Esra Bulbul, Edward M. Cackett and 179 other authors

Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi*

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