Wednesday, Oct. 11, 2006
... – Bethe-Bloch formula works well (up to above 1MeV for electrons) – But due to the small mass, electron’s energy loss gets complicated • Relativistic corrections take large effect even down to a few keV level • Electron projectiles can transfer large fractions of energies to the atomic electrons the ...
... – Bethe-Bloch formula works well (up to above 1MeV for electrons) – But due to the small mass, electron’s energy loss gets complicated • Relativistic corrections take large effect even down to a few keV level • Electron projectiles can transfer large fractions of energies to the atomic electrons the ...
Chapter 28
... In an analysis relating Bohr's theory to the de Broglie wavelength of electrons, when an electron moves from the n = 1 level to the n = 3 level, the circumference of its orbit becomes 9 times greater. This occurs because (a) there are 3 times as many wavelengths in the new orbit, (b) there are 3 tim ...
... In an analysis relating Bohr's theory to the de Broglie wavelength of electrons, when an electron moves from the n = 1 level to the n = 3 level, the circumference of its orbit becomes 9 times greater. This occurs because (a) there are 3 times as many wavelengths in the new orbit, (b) there are 3 tim ...
SOLID-STATE PHYSICS II 2007 O. Entin-Wohlman vs.
... by the impurities, or captured by them (and then there is a contribution to the hole concentration). Impurities which contribute electrons to the semiconductor are called ‘donors’, and those that capture electrons and hence contribute holes are called ‘acceptors’. Impurity energy levels. Let us firs ...
... by the impurities, or captured by them (and then there is a contribution to the hole concentration). Impurities which contribute electrons to the semiconductor are called ‘donors’, and those that capture electrons and hence contribute holes are called ‘acceptors’. Impurity energy levels. Let us firs ...
Mechanical Energy and Simple Harmonic Oscillator
... Answer 3. The particle starts with potential energy. When it first returns to equilibrium it now has only kinetic energy. Since the energy of the block-spring system is constant: (1/ 2)mvx2 (1/ 2)kx02 ...
... Answer 3. The particle starts with potential energy. When it first returns to equilibrium it now has only kinetic energy. Since the energy of the block-spring system is constant: (1/ 2)mvx2 (1/ 2)kx02 ...
Ensemble Averaging
... • Consider a batch of sedimenting particles: average settling velocity might be sufficient and one can do experiments, simple modelling or (in principle) numerical simulations to calculate it. • But now take the particles in a complicated flow: how do they behave? do they cluster? do they deposit? h ...
... • Consider a batch of sedimenting particles: average settling velocity might be sufficient and one can do experiments, simple modelling or (in principle) numerical simulations to calculate it. • But now take the particles in a complicated flow: how do they behave? do they cluster? do they deposit? h ...
Chapter 3.a
... • There are three alternative statistics (i.e. formulas) to measure the central tendency of a variable: * The Mean * The Median * The Mode ...
... • There are three alternative statistics (i.e. formulas) to measure the central tendency of a variable: * The Mean * The Median * The Mode ...
Ch18 The Micro/Macro Connection
... where p v is the probability of a particle whose velocity is v , ...
... where p v is the probability of a particle whose velocity is v , ...
Density of states
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In solid-state and condensed matter physics, the density of states (DOS) of a system describes the number of states per interval of energy at each energy level that are available to be occupied. Unlike isolated systems, like atoms or molecules in gas phase, the density distributions are not discrete like a spectral density but continuous. A high DOS at a specific energy level means that there are many states available for occupation. A DOS of zero means that no states can be occupied at that energy level. In general a DOS is an average over the space and time domains occupied by the system. Localvariations, most often due to distortions of the original system, are often called local density of states (LDOS). If the DOS of an undisturbedsystem is zero, the LDOS can locally be non-zero due to the presence of a local potential.