scholarly journals Time-resolved spectroscopic observations of shockinduced silicate ionization

2012 ◽  
Author(s):  
Kosuke Kurosawa ◽  
T. Kadono ◽  
S. Sugita ◽  
K. Shigemori ◽  
Yoichiro Hironaka ◽  
...  
Keyword(s):  
Time Resolved ◽  
Spectroscopic Observations

scholarly journals Time-Resolved in situ Raman Spectroscopic Observations of a Biomineralization Model System

2019 ◽  
Vol 25 (S2) ◽  
pp. 826-827
Author(s):  
Brian Wingender ◽  
Emma Tong ◽  
John Emery ◽  
Laurie Gower ◽  
Roland Kröger
Keyword(s):  
Model System ◽  
Time Resolved ◽  
Raman Spectroscopic ◽  
Spectroscopic Observations ◽  
In Situ Raman

scholarly journals Investigating the structure of the accretion disc in WZ Sge from multiwaveband time-resolved spectroscopic observations — II

2000 ◽  
Vol 318 (2) ◽  
pp. 440-452 ◽  
Author(s):  
Elena Mason ◽  
Warren Skidmore ◽  
Steve B. Howell ◽  
David R. Ciardi ◽  
Stuart Littlefair ◽  
...  
Keyword(s):  
Accretion Disc ◽  
Time Resolved ◽  
Spectroscopic Observations

scholarly journals Time-resolved spectroscopic observations of an M-dwarf flare star EV Lacertae during a flare

2018 ◽  
Vol 70 (4) ◽  
Author(s):  
Satoshi Honda ◽  
Yuta Notsu ◽  
Kosuke Namekata ◽  
Shota Notsu ◽  
Hiroyuki Maehara ◽  
...  
Keyword(s):  
Flare Star ◽  
Time Resolved ◽  
Spectroscopic Observations ◽  
M Dwarf

scholarly journals Mechanisms of Upconversion Luminescence of Er3+-Doped NaYF4 via 980 and 1530 nm Excitation

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2767
Author(s):  
Yu Liu ◽  
Ziwen Zhou ◽  
Shaojian Zhang ◽  
Enming Zhao ◽  
Jing Ren ◽  
...  
Keyword(s):  
Steady State ◽  
Numerical Simulations ◽  
Rate Equation ◽  
Upconversion Luminescence ◽  
Convincing Evidence ◽  
Equation Modeling ◽  
Time Resolved ◽  
Lanthanide Ion ◽  
Spectroscopic Observations ◽  
Simple Strategy

To date, the mechanisms of Er3+ upconversion luminescence via 980 and 1530 nm excitation have been extensively investigated; however, based on discussions, they either suffer from the lack of convincing evidence or require elaborated and time-consuming numerical simulations. In this work, the steady-state and time-resolved upconversion luminescence data of Er3+-doped NaYF4 were measured; we therefore investigated the upconversion mechanisms of Er3+ on the basis of the spectroscopic observations and the simplified rate equation modeling. This work provides a relatively simple strategy to reveal the UCL mechanisms of Er3+ upon excitation with various wavelengths, which may also be used in other lanthanide ion-doped systems.

scholarly journals Investigating the structure of the accretion disc in WZ Sge from multiwaveband time-resolved spectroscopic observations — I

2000 ◽  
Vol 318 (2) ◽  
pp. 429-439 ◽  
Author(s):  
Warren Skidmore ◽  
Elena Mason ◽  
Steve B. Howell ◽  
David R. Ciardi ◽  
Stuart Littlefair ◽  
...  
Keyword(s):  
Accretion Disc ◽  
Time Resolved ◽  
Spectroscopic Observations

Spectroscopic Observations of Visual Double Stars

1965 ◽  
Vol 5 ◽  
pp. 109-111
Author(s):  
Frederick R. West
Keyword(s):  
Radial Velocity ◽  
High Dispersion ◽  
Velocity Difference ◽  
Spectrograph Slit ◽  
Spectroscopic Observations ◽  
Double Stars ◽  
Visual Double Stars ◽  
Relative Orbit ◽  
Two Component ◽  
Star Images

There are certain visual double stars which, when close to a node of their relative orbit, should have enough radial velocity difference (10-20 km/s) that the spectra of the two component stars will appear resolved on high-dispersion spectrograms (5 Å/mm or less) obtainable by use of modern coudé and solar spectrographs on bright stars. Both star images are then recorded simultaneously on the spectrograph slit, so that two stellar components will appear on each spectrogram.

Models of Cataclysmic Variables from Photometric and Spectroscopic Data

1979 ◽  
Vol 46 ◽  
pp. 65-74 ◽  
Author(s):  
A.C. Fabian ◽  
J.E. Pringle ◽  
J.A.J. Whelan ◽  
J.A. Bailey
Keyword(s):  
Spectroscopic Data ◽  
Cataclysmic Variables ◽  
System Parameters ◽  
Dwarf Nova ◽  
Spectroscopic Observations ◽  
Photometric And Spectroscopic Observations

Abstract.Recent photometric and spectroscopic observations of the dwarf nova system Z Cha are discussed. Methods for constraining the system parameters are applied and the disc emissivity is deduced as a function of radius. Indications are found that the disc shrinks in size with increasing time after outburst.

Microtubule nucleation sequence studied by time-resolved x-ray scattering and electron microscopy

1983 ◽  
Vol 41 ◽  
pp. 766-767
Author(s):  
Eva-Maria Mandelkow ◽  
Eckhard Mandelkow ◽  
Joan Bordas
Keyword(s):  
Electron Microscopy ◽  
Dynamic Equilibrium ◽  
Time Resolved ◽  
X Ray ◽  
Additional Information ◽  
X Ray Scattering ◽  
Low Concentrations ◽  
Microtubule Growth ◽  
Ray Patterns ◽  
Ray Scattering

When a solution of microtubule protein is changed from non-polymerising to polymerising conditions (e.g. by temperature jump or mixing with GTP) there is a series of structural transitions preceding microtubule growth. These have been detected by time-resolved X-ray scattering using synchrotron radiation, and they may be classified into pre-nucleation and nucleation events. X-ray patterns are good indicators for the average behavior of the particles in solution, but they are difficult to interpret unless additional information on their structure is available. We therefore studied the assembly process by electron microscopy under conditions approaching those of the X-ray experiment. There are two difficulties in the EM approach: One is that the particles important for assembly are usually small and not very regular and therefore tend to be overlooked. Secondly EM specimens require low concentrations which favor disassembly of the particles one wants to observe since there is a dynamic equilibrium between polymers and subunits.

Electron Channeling Patterns

1977 ◽  
Vol 35 ◽  
pp. 12-13
Author(s):  
David C. Joy
Keyword(s):  
Electron Diffraction ◽  
Incidence Angle ◽  
Photographic Plate ◽  
Diffraction Effect ◽  
Angle Of Incidence ◽  
Bulk Single Crystal ◽  
Time Resolved ◽  
Electron Channeling ◽  
Spatially Resolved ◽  
Large Bulk

Electron channeling patterns (ECP) were first found by Coates (1967) while observing a large bulk, single crystal of silicon in a scanning electron microscope. The geometric pattern visible was shown to be produced as a result of the changes in the angle of incidence, between the beam and the specimen surface normal, which occur when the sample is examined at low magnification (Booker, Shaw, Whelan and Hirsch 1967).A conventional electron diffraction pattern consists of an angularly resolved intensity distribution in space which may be directly viewed on a fluorescent screen or recorded on a photographic plate. An ECP, on the other hand, is produced as the result of changes in the signal collected by a suitable electron detector as the incidence angle is varied. If an integrating detector is used, or if the beam traverses the surface at a fixed angle, then no channeling contrast will be observed. The ECP is thus a time resolved electron diffraction effect. It can therefore be related to spatially resolved diffraction phenomena by an application of the concepts of reciprocity (Cowley 1969).

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