Reflectance on Piezoelectric Ceramic Surfaces for the Determination of Phase Transition Using a Laser Beam

2002 ◽  
Vol 41 (Part 2, No. 10A) ◽  
pp. L1120-L1121 ◽  
Author(s):  
Ernesto Suaste ◽  
Rubén González ◽  
Victor Castillo
Keyword(s):  
Phase Transition ◽  
Laser Beam ◽  
Piezoelectric Ceramic ◽  
Ceramic Surfaces

Structure determination of sodium nitrate near the order-disorder phase transition

1984 ◽  
Vol 45 (8) ◽  
pp. 1317-1327 ◽  
Author(s):  
J. Lefebvre ◽  
R. Fouret ◽  
C.M.E. Zeyen
Keyword(s):  
Phase Transition ◽  
Sodium Nitrate ◽  
Structure Determination ◽  
Disorder Phase Transition

Determination of gradient index based on laser beam deflection by stochastic particle swarm optimization

2021 ◽  
Vol 127 (9) ◽  
Author(s):  
Linyang Wei ◽  
Guojun Li ◽  
Miaomiao Song ◽  
Cun-Hai Wang ◽  
Weijun Zhang
Keyword(s):  
Particle Swarm Optimization ◽  
Laser Beam ◽  
Particle Swarm ◽  
Beam Deflection ◽  
Gradient Index ◽  
Swarm Optimization ◽  
Stochastic Particle

Determination of ferroelastic phase transition temperature in BiVO4 by Raman spectroscopy

2021 ◽  
Vol 291 ◽  
pp. 129519
Author(s):  
Yuwaraj K. Kshetri ◽  
Bina Chaudhary ◽  
Takashi Kamiyama ◽  
Tae-Ho Kim ◽  
Federico Rosei ◽  
...  
Keyword(s):  
Phase Transition ◽  
Raman Spectroscopy ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Ferroelastic Phase Transition

Determination of Size Effects during the Phase Transition of a Nanoscale Au-Si Eutectic

2009 ◽  
Vol 103 (15) ◽  
Author(s):  
B. J. Kim ◽  
J. Tersoff ◽  
C.-Y. Wen ◽  
M. C. Reuter ◽  
E. A. Stach ◽  
...  
Keyword(s):  
Phase Transition ◽  
Size Effects

Determination of the temperature and enthalpy of the solid–solid phase transition of caesium nitrate by differential scanning calorimetry

2006 ◽  
Vol 445 (1) ◽  
pp. 36-39 ◽  
Author(s):  
E. Charrier ◽  
E.L. Charsley ◽  
P.G. Laye ◽  
H.M. Markham ◽  
B. Berger ◽  
...  
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimetry ◽  
Solid Phase ◽  
Scanning Calorimetry ◽  
Solid Phase Transition

A-Si:H Ambipolar Diffusion Length and Effective Lifetime Measured by Flying Spot Technique (FST)

1991 ◽  
Vol 219 ◽  
Author(s):  
M. Vieira ◽  
R. Martins ◽  
E. Fortunato ◽  
F. Soares ◽  
L. Guimaraes
Keyword(s):  
Laser Beam ◽  
Transient Analysis ◽  
Diffusion Length ◽  
Transport Equations ◽  
Ambipolar Diffusion ◽  
Schottky Barriers ◽  
Effective Lifetime ◽  
Asymmetrical Distribution ◽  
Flying Spot

ABSTRACTThe determination of the ambipolar diffusion length, L*, and the effective lifetime, τ*, in p/i and a-Si:H Schottky barriers (ITO/p/a-Si:H/Al-Si; Cr/a-Si:H/Cr/Ag) have been determined by Flying Spot Technique, FST. This technique consists in the transient analysis of the photocurrent/photopotential induced by a laser beam that moves perpendicularly to the structure with a constant motion ratio, at different velocities. Taking into account the competition between the diffusion/drift velocities of the excess carriers and the velocity of the flying spot, it is possible to solve the transport equations and to compute separately L* and τ*, from the asymmetrical distribution responses.

A NUCLEAR MANY-BODY THEORY AT FINITE TEMPERATURE APPLIED TO A PROTONEUTRON STAR

2002 ◽  
Vol 11 (02) ◽  
pp. 83-104 ◽  
Author(s):  
GUILHERME F. MARRANGHELLO ◽  
CESAR A. Z. VASCONCELLOS ◽  
MANFRED DILLIG ◽  
J. A. DE FREITAS PACHECO
Keyword(s):  
Phase Transition ◽  
Nuclear Matter ◽  
Finite Temperature ◽  
Degrees Of Freedom ◽  
Many Body ◽  
Many Body Theory ◽  
The Masses ◽  
Protoneutron Stars ◽  
Protoneutron Star

Thermodynamical properties of nuclear matter are studied in the framework of an effective many-body field theory at finite temperature, considering the Sommerfeld approximation. We perform the calculations by using the nonlinear Boguta and Bodmer model, extended by the inclusion of the fundamental baryon octet and leptonic degrees of freedom. Trapped neutrinos are also included in order to describe protoneutron star properties through the integration of the Tolman–Oppenheimer–Volkoff equations, from which we obtain, beyond the standard relations for the masses and radii of protoneutron stars as functions of the central density, new results of these quantities as functions of temperature. Our predictions include: the determination of an absolute value for the limiting mass of protoneutron stars; new structural aspects on the nuclear matter phase transition via the behavior of the specific heat and, through the inclusion of quark degrees of freedom, the properties of a hadron-quark phase transition and hybrid protoneutron stars

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