Digital imaging in radiology: preliminary results obtained with a high spatial resolution 2D silicon detector

1993 ◽  
Vol 40 (4) ◽  
pp. 987-991 ◽  
Author(s):  
B. Alfano ◽  
A. Bandettini ◽  
W. Bencivelli ◽  
E. Bertolucci ◽  
U. Bottigli ◽  
...  
2019 ◽  
Vol 15 (S350) ◽  
pp. 445-447
Author(s):  
C. Rab ◽  
G. A. Muro-Arena ◽  
I. Kamp ◽  
C. Dominik ◽  
L. B. F. M. Waters ◽  
...  

AbstractHD 163296 is a young star surrounded by a planet-forming disk that shows clear signatures of dust gaps and rings; likely an indication of ongoing planet formation. We use the radiation thermochemical disk code ProDiMo to investigate the impact of dust/gas gaps on the temperature, chemistry and observables. Furthermore, we model high spatial resolution gas and dust observation of HD 163296 (ALMA/DSHARP). Our first results indicate that features in the observed radial intensity profile of the 12CO line are a consequence of the dust gaps and do not require gas depletion. Those preliminary results indicate that self-consistent modelling of the gas (chemistry, heating/cooling) and dust is necessary to accurately infer the degree of gas depletion within dust gaps. Such information is crucial to understand the processes that generate the disk substructure and their relation to planet formation.


2018 ◽  
Vol 19 (4) ◽  
pp. 114-124 ◽  
Author(s):  
Khalsa Al Shukaili ◽  
Stéphanie Corde ◽  
Marco Petasecca ◽  
Vladimir Pereveratylo ◽  
Michael Lerch ◽  
...  

Instruments ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 15
Author(s):  
Mariano Lombardi ◽  
Gianfranco Prete ◽  
Giovanni Balbinot ◽  
Alice Ferretti ◽  
Giuseppe Galeazzi ◽  
...  

Results obtained with a new, very compact detector for imaging with a matrix of leak microstructures (LM) are reported. Spatial linearity and spatial resolution obtained by scanning and the detection of alpha particles with 100% efficiency, when compared with a silicon detector, are stressed. Preliminary results obtained in detecting single electrons emitted by the heated filament (Ec < 1 eV) at 1–3 mbar of propane are reported.


Author(s):  
K. Przybylski ◽  
A. J. Garratt-Reed ◽  
G. J. Yurek

The addition of so-called “reactive” elements such as yttrium to alloys is known to enhance the protective nature of Cr2O3 or Al2O3 scales. However, the mechanism by which this enhancement is achieved remains unclear. An A.E.M. study has been performed of scales grown at 1000°C for 25 hr. in pure O2 on Co-45%Cr implanted at 70 keV with 2x1016 atoms/cm2 of yttrium. In the unoxidized alloys it was calculated that the maximum concentration of Y was 13.9 wt% at a depth of about 17 nm. SIMS results showed that in the scale the yttrium remained near the outer surface.


Author(s):  
E. G. Rightor

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.


Author(s):  
Kosuke Nomura ◽  
Ryutaro Oi ◽  
Takanori Senoh ◽  
Taiichiro Kurita ◽  
Takayuki Hamamoto

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