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Microplastic Spectral Classification Needs an Open Source Community: Open Specy to the Rescue!

May 19, 2021

Author(s)

Win Cowger, Gray Andrew, Chelsea Rochman, Sebastian Primpke, Jennifer Lynch, Hannah Hapich, Hannah De Frond, Keenan Munno

Microplastic pollution research has suffered from inadequate data and tools for spectral (Raman and infrared) classification. Spectral matching tools often are not accurate for microplastics identification and are cost-prohibitive. Lack of accuracy stems

Mid-infrared interference coatings with excess optical loss below 10 ppm

May 14, 2021

Author(s)

G Winkler, L W. Perner, Gar-Wing Truong, Gang Zhao, D Bachmann, A S. Mayer, J Fellinger, T Zederbauer, D Follman, P Heu, C Deutsch, D. Michelle M. Bailey, S Puchegger, Adam Fleisher, G D. Cole, O H. Heckl

Rapid Passage Signals from CO2 at 1.6 um Using a Dual Chirped-Pulse Electro-Optic Comb System with High-Order Interleaving

May 14, 2021

Author(s)

Jasper Stroud, David Plusquellic, James Simon, Gerd Wagner

We demonstrate a method for interleaving high-order sidebands in a fast-sweeping electro-optic dual-comb system. We probe CO2 at 1.6 um and show sweep-rate dependent rapid-passage effects modeled with the Maxwell-Bloch equations.

Challenges and advances in the application of dynamic nuclear polarization to liquid-state NMR spectroscopy

May 7, 2021

Author(s)

Nandita Abhyankar, Veronika Szalai

Dynamic nuclear polarization (DNP) can overcome the relatively low sensitivity of nuclear magnetic resonance (NM) spectroscopy by using a paramagnetic matrix to hyperpolarize a nuclear spin ensemble. Application of DNP-NMR results in sensitivity gains of

Spectral, spatial, and survivability evaluation of a binder-depleted, isotropic mat, nanotube spray coating

May 3, 2021

Author(s)

Matthew Spidell, Davis conklin, Christopher Yung, EVANGELOS THEOCHAROUS, John H. Lehman

We have improved the manufacturability of spectrally flat pyroelectric detectors for visible to mid-infrared wavelengths by demonstrating a spray-on, binder-depleted, carbon nanotube coating compatible with LiTaO3 sensors. This commercially available

Identifications of extreme ultraviolet spectra of Br-like to Ni-like neodymium ions using an electronbeam ion trap

April 30, 2021

Author(s)

C. Suzuki, Dipti Goyal, Y. Yang, A. Gall, Roshani Silwal, S. Sanders, Aung S. Naing, Joseph N. Tan, Endre A. Takacs, Yuri Ralchenko

Charge-resolved extreme ultraviolet spectra of open N-shell neodymium (Nd) ions have been recorded in an electron beam ion trap facility at the National Institute of Standards and Technology. The measurements have been performed for nominal electron beam

Absolute 13C/12C isotope amount ratio for Vienna PeeDee Belemnite from infrared absorption spectroscopy

April 26, 2021

Author(s)

Adam Fleisher, Hongming Yi, Abneesh Srivastava, Oleg Polyansky, Nikolai Zobov, Joseph T. Hodges

Stray light characterization in a high-resolution imaging spectrometer designed for solar-induced fluorescence

April 22, 2021

Author(s)

David W. Allen, Loren Albert, James Kellner, Yuqin Zong, Katherine Cushman, Luis Alonso

New commercial-off-the-shelf imaging spectrometers promise the combination of high spatial and spectral resolution needed to retrieve solar induced fluorescence (SIF), an emission of light from chlorophyll in plants that can be used to study photosynthesis

Wavelength calibration method for spectroradiometers with picometer uncertainties

April 22, 2021

Author(s)

Yuqin Zong

Accurate wavelength calibration of array spectroradiometers is critical to many applications. We developed a new method for calibration of array spectroradiometers' wavelength scales using a wavelength-tunable kilohertz-pulsed optical parametric oscillator

Air-broadening in near-infrared carbon dioxide line shapes: quantifying contributions from O2, N2, and Ar

April 19, 2021

Author(s)

Erin Adkins, David Long, Joseph T. Hodges

We measured air broadening in the (30012) ← (00001) carbon dioxide (CO2) band up to Jʺ = 50 using frequency-agile rapid scanning cavity ring-down spectroscopy. By using synthetic air samples with varying levels of nitrogen, oxygen, and argon, multi

Gamma and Decay Energy Spectroscopy Measurements of Trinitite

April 7, 2021

Author(s)

David Mercer, Katrina Koehler, Mark Croce, Andrew Hoover, Philip Hypes, Stosh Kozimor, Veronika Mocko, Paul Saey, Dan Schmidt, Joel Ullom

We report gamma ray spectroscopy measurements of trinitite samples and analogous samples obtained from detonation sites in Nevada and Semipalatinsk, as well as in situ measurements of topsoil at the Trinity site. We also report the first isotopic

Setting Bounds on Entangled Two-Photon Absorption Cross Sections in Common Fluorophores

April 6, 2021

Author(s)

Kristen Parzuchowski, Alexander Mikhaylov, Michael Mazurek, Ryan N. Wilson, Daniel J. Lum, Thomas Gerrits, Charles Camp, Marty Stevens, Ralph Jimenez

2p x-ray absorption spectroscopy of 3d transition metal systems

April 3, 2021

Author(s)

Eric L. Shirley, John Vinson, Frank de Groot, Hebatalla Elnaggar, Federica Frati, Ru-pan Wang, Mario Delgado, Michel van Veenendaal, Maurits Haverkort, Robert Green, Yaroslav Kvashnin, Atsushi Hariki, Harry Ramanantoanina, Claude Daul, Bernard Delley, Michael Odelius, Marcus Lundberg, Oliver Kuhn, Sergey Bokarev, Keith Gilmore, Mauro Stener, Giovanni Fronzoni, Piero Decleva, Peter Kruger, Marius Retegan, Javier Fernandez-Rodriguez, Gerritt van der Laan, Yves Joly, Christian Vorwerk, Claudia Draxl, John Rehr, Arata Tanaka, Hidekazu Ikeno

A variety of methods are presented that are presently used to treat x-ray absorption spectra of transition-metal 2p edges in a wide range of compounds. Different methods include different methods of chemical realism versus featuring the simplifications of