Maximal kinetic energy and angular distribution analysis of spatial map imaging: Application to photoelectrons from a single quantum state of H2O

2021 ◽  
Vol 154 (13) ◽  
pp. 134201
Author(s):  
Yair Yifrach ◽  
Rami Rahimi ◽  
Alexander Portnov ◽  
Joshua H. Baraban ◽  
Ilana Bar
Keyword(s):  
Angular Distribution ◽  
Kinetic Energy ◽  
Quantum State ◽  
Distribution Analysis ◽  
Single Quantum ◽  
Imaging Application

Time fractional evolution of a single quantum state and entangled state

2021 ◽  
Vol 147 ◽  
pp. 110930
Author(s):  
Chuanjin Zu ◽  
Yanming Gao ◽  
Xiangyang Yu
Keyword(s):  
Quantum State ◽  
Entangled State ◽  
Single Quantum

Laser cooling to a single quantum state in a trap: One-dimensional results

1995 ◽  
Vol 52 (6) ◽  
pp. 4709-4718 ◽  
Author(s):  
T. Pellizzari ◽  
P. Marte ◽  
P. Zoller
Keyword(s):  
Quantum State ◽  
Laser Cooling ◽  
Single Quantum ◽  
One Dimensional

scholarly journals The diffraction of electrons in the halogens

1934 ◽  
Vol 144 (852) ◽  
pp. 360-377 ◽  
Keyword(s):  
Angular Distribution ◽  
Kinetic Energy ◽  
Electronic Structures ◽  
Nuclear Charge ◽  
Incident Beam ◽  
Electron Shell ◽  
Wave Functions ◽  
Outer Electron ◽  
Satisfactory Explanation ◽  
Diffraction Effects

Although the complete theory of the scattering of electrons by gas atoms must take into account the distortion of the incident and scattered waves by the atomic field, the exchange of electrons between the atom and the incident beam, and the disturbance of the atomic wave functions by the incident and scattered waves, a satisfactory explanation of the diffraction effects observed in the angular distribution of the elastically scattered electrons is obtained simply by considering the distortion of the incident wave by the undisturbed field of the atom. The scattering at large angles will then mainly depend upon the nature of the atomic field at the point in the atom where the potential energy of the incident electrons is equal to their kinetic energy. Now the magnitude and gradient of the field at any point within the atom at a distance r from the centre is determined mainly by the nuclear charge and the screening constants of the electrons within the radius r , and hence the nature of the field at a point well within the outer electron shell will be similar for atoms whose electronic structures differ only in the constitution of the outer shell.

scholarly journals Stimulated Processes in a Half-collision

1986 ◽  
Vol 5 (6) ◽  
pp. 393-406
Author(s):  
H. H. Telle
Keyword(s):  
Kinetic Energy ◽  
Quantum State ◽  
Ground State ◽  
Diatomic Molecules ◽  
Dye Laser ◽  
Interatomic Potentials ◽  
Repulsive Potential ◽  
Induced Absorption ◽  
Tunable Dye Laser

Selective photodissociation of diatomic molecules is used to prepare the separating species in a well defined quantum state with narrowly determined final kinetic energy of the particles. During the course of separation to products the repulsive potential is probed by a tunable dye laser, that is by induced absorption in case the dissociation proceeds on a potential leading to ground state products, or by induced emission or absorption for all other cases. The determination of interatomic potentials from the observed spectra is discussed.

scholarly journals Asymmetry flip in photoelectron angular distribution of rare gas atoms in intense circularly-polarized few-cycle laser fields

2019 ◽  
Vol 205 ◽  
pp. 06011
Author(s):  
Shinichi Fukahori ◽  
Kaoru Yamanouchi ◽  
Gerhard G. Paulus
Keyword(s):  
Angular Distribution ◽  
Kinetic Energy ◽  
Laser Pulse ◽  
Pulse Duration ◽  
Analytical Formula ◽  
Laser Pulse Duration ◽  
Rare Gas ◽  
Circularly Polarized ◽  
Photoelectron Angular Distribution ◽  
Rare Gas Atoms

An analytical formula representing the photoelectron kinetic energy at which the ejection direction of photoelectrons generated by an intense circularly-polarized few-cycle laser pulse flips was derived and was used for determining the laser pulse duration.

Electron–electron scattering rate in CdTe/CdMnTe single quantum well

2021 ◽  
pp. 2150221
Author(s):  
Zhaosai Jia ◽  
Hailong Wang ◽  
Chuanhe Ma ◽  
Xin Cao ◽  
Qian Gong
Keyword(s):  
Kinetic Energy ◽  
Quantum Well ◽  
Electron Scattering ◽  
Electron Transition ◽  
Collision Probability ◽  
Electron Collision ◽  
Single Quantum ◽  
Single Quantum Well ◽  
Scattering Rate ◽  
Composition Formula

CdMnTe is demonstrated to be a good candidate in the X-ray and [Formula: see text]-ray detector application, however, there are few reports on theoretical analysis of electron scattering rate in CdMnTe quantum well. Within the framework of effective mass approximation and envelope function approximation, the influence of the Mn alloy composition ([Formula: see text], the well width ([Formula: see text], the electron temperature ([Formula: see text] and the electron density ([Formula: see text] on the electron–electron scattering rate (1/[Formula: see text] in the CdTe/Cd[Formula: see text]Mn[Formula: see text]Te single quantum well (SQW), are simulated by shooting method and Fermi’s Golden Rule. The results show that 1/[Formula: see text] is significant inverse proportional to [Formula: see text], but positively proportional to [Formula: see text] and [Formula: see text]. Except for a small peak at 20 K, 1/[Formula: see text] is not sensitive to [Formula: see text]. The above differential dependency of 1/[Formula: see text] on [Formula: see text] and [Formula: see text] can be interpreted by sub-band separation ([Formula: see text], which is proportional to [Formula: see text] but inversely proportional to [Formula: see text]. When [Formula: see text] decreases gradually, the electron transition becomes easier, which leads to 1/[Formula: see text] increases. The dependency of 1/[Formula: see text] on [Formula: see text] can be interpreted by kinetic energy of electrons. The larger the electron kinetic energy is, the more difficult the electron transition from first excited state to ground state is, which leads to 1/[Formula: see text] decreasing. The dependency of 1/[Formula: see text] on [Formula: see text] can be interpreted by the Coulomb interaction between electrons, i.e., the increase of electron collision probability caused by the increase of [Formula: see text].

BIMODAL ANGULAR AND VELOCITY DISTRIBUTIONS OF CO2 DESORBING AFTER OXIDATION OF CO ON Pt(111)

1995 ◽  
Vol 02 (06) ◽  
pp. 741-758 ◽  
Author(s):  
E. POEHLMANN ◽  
M. SCHMITT ◽  
H. HOINKES ◽  
H. WILSCH
Keyword(s):  
Angular Distribution ◽  
Kinetic Energy ◽  
Continuous Flow ◽  
Oxidation Of Co ◽  
Total Oxygen ◽  
Time Effects ◽  
Surface Sites ◽  
Beam Surface ◽  
Nozzle Beam ◽  
Mean Kinetic Energy

Time-of-flight (TOF) distributions of CO 2 molecules desorbing after the oxidation of CO on Pt (111) were investigated at various desorption angles ϑ for surface temperatures Ts in the range 550–800 K. The Pt (111) surface was exposed to a continuous flow of O 2 from a doser and to a chopped CO nozzle beam. Surface residence-time effects proved to be unimportant or were elucidated. Bimodal TOF distributions composed of two parts were obtained: molecules with a Maxwellian velocity distribution corresponding to Ts appeared in a cosine-shaped angular distribution and molecules with appreciably higher kinetic energies (mean kinetic energy normal to the surface <E kin >⊥≈9kTs) were observed in a narrow angular distribution proportional to cos 8 ϑ. The partition of the total desorbing CO 2 flux to these two channels depended on Ts and ϑ and the total oxygen dose d0 accumulated during an experiment. With increasing d0 the Maxwellian component markedly increased at the expense of the fast component. The observed trends suggest almost only fast desorption from clean Pt (111). We therefore assume Maxwellian desorption to occur mainly from surface sites gradually produced under the influence of oxygen.

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