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A 3D maser model has been used to perform an inverse problem on the light curves from three high-amplitude maser flares, selected on the basis of contemporaneous infra-red observations. Plots derived from the model recover the size of the…

Solar and Stellar Astrophysics · Physics 2020-07-08 M. D. Gray , S. Etoka , B. Pimpanuwat

Liquid transportation fuels require costly and time-consuming tests to characterize metrics, such as Research Octane Number (RON) for gasoline. If fuel sale restrictions requiring use of standard Cooperative Fuel Research testing procedures…

Chemical Physics · Physics 2016-07-06 Shane R. Daly , Kyle E. Niemeyer , William J. Cannella , Christopher L. Hagen

Context. The number of identified complex organic molecules (COMs) in inter- and circumstellar gas-phase environments is steadily increasing. Recent laboratory studies show that many such species form on icy dust grains. At present only…

Solar and Stellar Astrophysics · Physics 2018-03-21 J. Terwisscha van Scheltinga , N. F. W. Ligterink , A. C. A. Boogert , E. F. van Dishoeck , H. Linnartz

Hard X-ray and extremely low energy bulk-sensitive photoelectron spectroscopy has been performed in the temperature range of 100-330 K for Fe3O4. In the high temperature phase just above the Verwey transition, the intensity at the Fermi…

A Fourier Transform (FT) absorption spectrum of room temperature NH3 in the region 7400 - 8600 cm-1 is analysed using a variational line list and ground state energies determined using the MARVEL procedure. The spectrum was measured by Dr…

Chemical Physics · Physics 2016-07-05 Emma J. Barton , Sergei. N. Yurchenko , Jonathan Tennyson , S. Béguier , A. Campargue

Monte Carlo calculations of the Ne K$\alpha$ line fluoresced by coronal x-rays and emitted near the temperature minimum region of the solar atmosphere have been employed to investigate the use of this feature to measure directly the solar…

Astrophysics · Physics 2009-11-13 Jeremy J. Drake , Barbara Ercolano

Fluorescence fluctuation spectroscopy is applied to study molecules, passing through a small observation volume, usually subjected to diffusive or convective motion in liquid phase. We suggest that such a technique could be used to measure…

The Fourier Transform Spectrometer (FTS) of the Spectral and Photometric Imaging REceiver (SPIRE) on board the ESA Herschel Space Observatory has two detector setting modes: (a) a nominal mode, which is optimized for observing moderately…

In liquid argon-based particle detectors, slow wavelength shifters (WLSs) could be used alongside the common, nanosecond scale, WLS tetraphenyl butadiene (TPB) for background mitigation purposes. At room temperature, pyrene has a moderate…

Previously reported excitation spectra for eumelanin are sparse and inconsistent. Moreover, these studies have failed to account for probe beam attenuation and emission reabsorption within the samples, making them qualitative at best. We…

Soft Condensed Matter · Physics 2007-05-23 Stephen Nighswander-Rempel , Jennifer Riesz , Joel Gilmore , Jacques Bothma , Paul Meredith

The nitrogen fluorescence induced in air is used to detect ultra-high energy cosmic rays and to measure their energy. The precise knowledge of the absolute fluorescence yield is the key quantity to improve the accuracy on the cosmic ray…

Astrophysics · Physics 2008-12-18 G. Lefeuvre , P. Gorodetzky , J. Dolbeau , T. Patzak , P. Salin

Infrared spectroscopic observations have established the presence of hydrocarbon ices on Pluto and other TNOs, but the abundances of such molecules cannot be deduced without accurate optical constants (n, k) and reference spectra. In this…

Instrumentation and Methods for Astrophysics · Physics 2015-02-10 R. L. Hudson , P. A. Gerakines , M. H. Moore

We measured phonon dispersion in single crystal EuTiO$_3$ using inelastic x-ray scattering. A structural transition to an antiferrodistortive phase was found at a critical temperature $T_0$=287$\pm$1 K using powder and single-crystal x-ray…

Strongly Correlated Electrons · Physics 2015-06-11 David S. Ellis , Hiroshi Uchiyama , Satoshi Tsutsui , Kunihisa Sugimoto , Kenichi Kato , Daisuke Ishikawa , Alfred Q. R. Baron

Methanol-water liquid mixtures have been investigated by high-energy synchrotron X-ray and neutron diffraction at low temperatures. We are thus able to report the first complete sets of both X-ray and neutron weighted total scattering…

We have performed light-scattering measurements in dilute and semidilute polymer solutions of polystyrene in toluene when subjected to stationary temperature gradients. Five solutions with concentrations below and one solution with a…

Soft Condensed Matter · Physics 2013-05-15 W. B. Li , K. J. Zhang , J. V. Sengers , R. W. Gammon , J. M. Ortiz de Zarate

This dataset encompasses fluorescence spectra and chemical parameters of 24 olive oil samples from the 2019-2020 harvest provided by the producer Conde de Benalua, Granada, Spain. The oils are characterized by different qualities: 10 extra…

Quantitative Methods · Quantitative Biology 2023-01-12 Francesca Venturini , Michela Sperti , Umberto Michelucci , Arnaud Gucciardi , Vanessa M. Martos , Marco A. Deriu

Motivated by the challenge of identifying intruder ions in a cold ion crystal, we investigate calorimetry from emitted fluorescence light. Under continuous Doppler cooling, the ion crystal reaches a temperature equilibrium with a fixed…

Spectrum of the neutrinos produced in the massive photon and longitudal plasmon decay process has been computed with four levels of approximation for the dispersion relations. Some analytical formulae in limiting cases are derived.…

Astrophysics · Physics 2009-06-23 A. Odrzywolek

Liquid-liquid equilibrium (LLE) phase diagrams have been determined, by means of the critical opalescence method with a laser scattering technique, for the mixtures 4-phenylbutan-2-one + CH$_3$(CH$_2$)$_n$CH$_3$ ($n = 10,12,14$) and for…

We use a Fourier transform spectrometer based on a compact mid-infrared difference frequency generation comb source to perform broadband high-resolution measurements of nitrous oxide, $^{14}$N$_2$$^{16}$O, and retrieve line center…