Simultaneous observation of sporadic potassium and sodium layers over São José dos Campos, Brazil (23.1° S, 45.9° W)

2021 ◽  
Author(s):  
V.F. Andrioli ◽  
J. Xu ◽  
P. P. Batista ◽  
A. A. Pimenta ◽  
M. P. P. Martins ◽  
...  
Keyword(s):  
Simultaneous Observation

Simultaneous observation of light localization and confinement in near-field optics

2001 ◽  
Vol 56 (4) ◽  
pp. 517-522 ◽  
Author(s):  
D Peyrade ◽  
R Quidant ◽  
J.-C Weeber ◽  
A Dereux ◽  
G Lévêque ◽  
...  
Keyword(s):  
Near Field ◽  
Simultaneous Observation ◽  
Near Field Optics ◽  
Light Localization

Experiments on the reaction T( d , n ) 4 He I. The 90° cross-section

1951 ◽  
Vol 204 (1079) ◽  
pp. 488-499 ◽  
Keyword(s):  
Cross Section ◽  
Heavy Water ◽  
Incident Beam ◽  
Absolute Magnitude ◽  
Alpha Particles ◽  
Low Energy ◽  
Energy Relation ◽  
Conventional Theory ◽  
Simultaneous Observation ◽  
The Cross

The 90° cross-section of the reaction 3 1 H( d , n ) 4 2 He has been investigated over the energy range 100 to 200 keV (energy of bombarding triton) using the 200 keV accelerating set of the establishment. Two methods have been used. As a preliminary experiment the yield of alpha-particles from a thick heavy-ice target was measured per unit charge of incident beam, as a function of deuteron energy, and the variation of cross-section deduced from the gradient of this excitation curve and the range energy relation for tritons in heavy water. Secondly, a comparison was made between the yield of alpha-particles from the D-T reaction and the yield of protons from the D-D reaction when a beam containing both deuterons and tritons was passed through a heavy-water vapour target. (The energy loss in this target was calculated as only a few hundred electron volts.) To do this a simultaneous observation was made of the protons and alpha-particles using the same counter. The values obtained for the cross-section have been compared with the resonance formulae given by Bretscher & French (1949) and by Tascbek, Everhart, Gittings, Hemmendinger & Jarvis (1948) and have been found to be in disagreement with formulae of this type. From considerations of the absolute magnitude of the cross-section it has been deduced that no conventional theory postulating reaction at a distance equal to the sum of the nuclear radii (cf. Konopinski & Teller 1948) will be able to explain this reaction. The evidence for a low-energy resonance (Allan & Poole 1949) is thought to be inconclusive.

Simultaneous observation of the behavior of impurities and silicon atoms in silicon isotope superlattices

2007 ◽  
Vol 401-402 ◽  
pp. 597-599 ◽  
Author(s):  
Yasuo Shimizu ◽  
Akio Takano ◽  
Masashi Uematsu ◽  
Kohei M. Itoh
Keyword(s):  
Silicon Isotope ◽  
Simultaneous Observation

Evaluation of Residual Stresses in Thin Films by Means of Micro-Raman Spectroscopy

1997 ◽  
Vol 505 ◽  
Author(s):  
Kazuyuki Mizuhara ◽  
Shinichi Takahashi ◽  
Jyunichi Kurokawa ◽  
Noboru Morita ◽  
Yoshitaro Yoshida
Keyword(s):  
Raman Spectroscopy ◽  
Temperature Effects ◽  
Simultaneous Observation ◽  
Stress Evaluation ◽  
Advantages And Disadvantages ◽  
Micro Raman Spectroscopy ◽  
Boron Doped ◽  
Doped Silicon ◽  
Fluid Cooling ◽  
Anti Stokes

ABSTRACTThe effects of temperatures on the stress evaluation of boron doped silicon in solid and film forms are investigated. Several techniques, such as fluid cooling to eliminate the temperature raise and/or simultaneous observation of Stokes and anti Stokes peaks to compensate the temperature effects, are applied. The advantages and disadvantages of each method and the abilities and limits of these techniques are discussed.

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