Now showing items 51-60 of 1507
Digital techniques for real-time pulse shaping in radiation measurements
(Elsevier, 1994-12-30)
Recursive algorithms for real-time digital pulse shaping in pulse height measurements have been developed. The differentiated signal from the preamplifier (exponential pulse) is amplified and then digitized. Digital data ...
The vibrational relaxation of I2I2 (X 1Σg+)(X1Σg+) in mesitylene
(The American Institute of Physics, 1998-03-22)
Transient absorption measurements between 400 nm and 570 nm are used to extract information on the vibrational relaxation of iodine in the complexing solvent mesitylene. The well characterized nature of the I2I2-arene ...
Wave damping by a thin layer of viscous fluid
(The American Institute of Physics, 1997-05)
The rate of damping of surface gravity–capillary waves is investigated, in a system which consists of a thin layer of a Newtonian viscous fluid of thickness dd floating on a Newtonian fluid of infinite depth. The surface ...
Universal correlation between energy gap and foldability for the random energy model and lattice proteins
(The American Institute of Physics, 1999-10-08)
The random energy model, originally used to analyze the physics of spin glasses, has been employed to explore what makes a protein a good folder versus a bad folder. In earlier work, the ratio of the folding temperature ...
Photoluminescence Studies on Self-Organized InAlAs/AlGaAs Quantum Dots under Pressure
(WILEY-VCH Verlag, 1999-01)
The pressure dependence of the low temperature photoluminescence (PL) in self-organized In 0.5 Al 0.5 As/Al 0.25 Ga 0.75 As quantum dots (QD) has been investigated up to 8 GPa. Interesting features of the QD PL observed ...
The influence of heat treatments on order–disorder phenomena in a naturally occurring manganese‐ferrite
(The American Institute of Physics, 1994-05-15)
Naturally occurring samples of iwakiite, Mn1.1Fe1.9O4, have been annealed for 17 and 77 h at 1000 K in an investigation of order–disorder phenomena in Mn–Fe oxide spinels. Two distinct magnetic hyperfine patterns, which ...
Simulation of dynamic fracture of an impact-loaded brittle solid
(IOP Publishing Ltd, 1994-11-01)
A new model for simulating dynamic fracture in impact-loaded solids is presented. This model is based upon the traditional molecular dynamics procedure, but accounts for the irreversible nature of the fracture process by ...
Weak and strong vibration localization in disordered structures: A statistical investigation
(Elsevier, 1990-05-22)
A statistical investigation of the effects of disorder on the dynamics of one-dimensional nearly periodic structures is presented. The problem of vibration propagation from a local source of excitation is considered. While ...
Search for diffuse cosmic gamma rays above 200 TeV with the Utah‐Michigan array
(The American Institute of Physics, 1991-04-05)
We have searched for γ‐rays in the cosmic radiation above 200 TeV using a two‐level array of scintillators designed to measure both the electromagnetic and muon content of extensive air showers. We find no evidence for an ...
Theory of lateral bandgap variation achievable by strain engineering in patterned substrate strain epitaxy
(Elsevier, 1990)
Energy minimization considerations are used to estimate the strain tensor for pseudomorphic structures grown on a patterned substrate. We show that if a material B is deposited below critical thickness in a hole of width ...