搜索结果: 1-15 共查到“原子分子物理学 ion”相关记录15条 . 查询时间(0.084 秒)
Fundamental Limit to Atom-Ion Sympathetic Cooling in Paul Traps
Atom-Ion Sympathetic Paul Traps Atomic Physics
2012/5/31
We present a fundamental limit to the sympathetic cooling of ions in radio-frequency traps using cold atoms. The limit arises from the work done by the trap electric field during a long-range ion-atom...
Ground state sideband cooling of an ion in a room temperature trap with a sub-Hertz heating rate
Ground state sideband ion sub-Hertz heating rate Atomic Physics
2012/5/29
We demonstrate resolved sideband laser cooling of a single 40Ca+ ion in a macroscopic linear radio frequency trap with a radial diagonal electrode spacing of 7 mm and an rf drive frequency of just 3.7...
Direct imaging of thermally excited metastable structures of ion Coulomb clusters
Direct imaging thermally excited metastable structures ion Coulomb clusters
2012/2/28
Coulomb crystallisation of large ensembles of ions has in the past years been intensively studied experimentally with many spectacular results of relevance to infinite systems in one-, two-, and three...
We have developed a novel scheme to measure the secular motion of trapped ions. Employing pulsed excitation and analysis of the uorescence of laser cooled ions, the COM-mode frequency of single as we...
On the application of radio frequency voltages to ion traps via helical resonators
radio frequency voltages ion traps helical resonators
2011/9/6
Ions confined using a Paul trap require a stable, high voltage and low noise radio frequency (RF) potential. We present a guide for the design and construction of a helical coil resonator for a desire...
Parity nonconservation in ytterbium ion
Parity nonconservation ytterbium ion Atomic Physics
2011/8/3
Abstract: We consider parity nonconservation (PNC) in singly ionized ytterbium (Yb+) arising from the neutral current weak interaction. We calculate the PNC electric dipole transition amplitude (E1_PN...
We have investigated the all-optical generation of ions by photo-ionisation of atoms generated by pulsed laser ablation. A direct comparison between a re-
sistively heated oven source and pulsed lase...
Electric field compensation and sensing with a single ion in a planar trap
Electric field compensation and sensing ion
2011/9/1
We use a single ion as an movable electric field sensor with accuracies on the order of a few V/m. For this, we compensate undesired static electric fields
in a planar RF trap and characterize the st...
Quantum Dynamics of Radical-Ion-Pair Reactions
Quantum Dynamics Radical-Ion-Pair Reactions
2010/10/20
Radical-ion-pair reactions were recently shown to represent a rich biophysical laboratory for the application of quantum measurement theory methods and concepts, casting doubt on the validity of the t...
Autoionization of He atoms induced by partially stripped ion impact
autoionization post-collisional interactions rainbow scattering
2010/6/30
A study of the autoionization process induced by partially stripped ion impact is performed. The Barrachina-Macek model is extended to the case in which the projectile-emitted electron interaction is ...
A Comparison between Channel Selections in Heavy Ion Reactions
Yrast states Fusion-evaporation Deep-inelastic Channel selections Heavy ion reactions
2010/7/5
The gamma rays de-exciting the yrast and near yrast states in neutron deficient as well as neutron rich nuclei from fusion-evaporation and deep-inelastic reactions and other emission particles have be...
Incident-Energy Dependence of the Effective Temperature in Heavy-Ion Collisions
Incident-Energy Dependence the Effective Temperature Heavy-Ion Collisions
2010/10/19
We study, in a hydrodynamical approach, the energy dependence of the kaon mT spectra in central Pb+Pb (Au+Au) collisions. We show that the experimental data of the inverse slope parameter can be repro...
Strangeness Production in Relativistic Heavy Ion Collisions
Strangeness Production Relativistic Heavy Ion Collisions
2010/10/19
In this article, I’ll present some of the motivations for the study of strangeness production in relativistic heavy ions collisions. Several experimental results have demonstrated that strangeness pro...
On Open Charm Production in Heavy Ion Collisions
Heavy Ion Collisions nucleus collisions quark gluon plasma
2010/10/19
We update the calculation of c ¡ c production in the initial stage of nucleus - nucleus collisions and within quark gluon plasma, using the most recent and most accepted values for the ingredien...
Can we Observe the Radion and Higgs Signals in Peripheral Heavy Ion Collisions?
the Radion and Higgs Signals Peripheral Heavy Ion Collisions
2010/10/19
Can we Observe the Radion and Higgs Signals in Peripheral Heavy Ion Collisions?