Collision-induced dissociation dynamics in O2++Ne(Ar) collisions: The role of electronic excitation

2000 ◽  
Vol 113 (19) ◽  
pp. 8561-8566 ◽  
Author(s):  
Rainer A. Dressler ◽  
Yu-hui Chiu ◽  
Dale J. Levandier ◽  
C. Y. Ng
Keyword(s):  
Electronic Excitation ◽  
Collision Induced Dissociation ◽  
Dissociation Dynamics

Theoretical study of Zeno and anti-Zeno effects on photodissociation dynamics: A model approach

2016 ◽  
Vol 15 (08) ◽  
pp. 1650070 ◽  
Author(s):  
Bikram Nath ◽  
Chandan Kumar Mondal
Keyword(s):  
Repeated Measurements ◽  
Time Interval ◽  
Mathematical Tool ◽  
Population Transfer ◽  
Vibrational States ◽  
Initial State ◽  
Zeno Effect ◽  
Dissociation Dynamics ◽  
Vibrational Population

Zeno and anti-Zeno effects in the evolution of the multi-photonic dissociation dynamics of the diatomic molecule HBr[Formula: see text] owing to repeated measurements demand if the system in the initial state have been studied. The effects have been calculated numerically for the case of vibrational population transfer and dissociation dynamics of HBr[Formula: see text] taking it as a model. We use time-dependent Fourier grid Hamiltonian (TDFGH) method as a mathematical tool in presence of intense radiation field as perturbation. The effects have been explored through a probable mechanism of population transfer from the ground vibrational state to the different upper vibrational states which ultimately go to the dissociation continuum. The results show significant differences in the mechanism of population transfer and the significant role of time interval of measurement ([Formula: see text] in Zeno and anti-Zeno effects. In case of survival probability of ground vibrational states, there is Zeno effect when the frequency of the laser to which the molecule is submitted is near the vibrational [Formula: see text] to [Formula: see text] resonance, while there is anti-Zeno effect if it is far from this resonance.

Collision-induced dissociation dynamics of Ar2+ at high levels of vibrational excitation

2000 ◽  
Vol 112 (24) ◽  
pp. 10880-10889 ◽  
Author(s):  
Yu-hui Chiu ◽  
Steve Pullins ◽  
Dale J. Levandier ◽  
Rainer A. Dressler
Keyword(s):  
Vibrational Excitation ◽  
Collision Induced Dissociation ◽  
Dissociation Dynamics

COLLISIONS OF LONG-LIVED EXCITED IONS OF OXYGEN AND NITROGEN

1964 ◽  
Vol 42 (11) ◽  
pp. 2086-2101 ◽  
Author(s):  
William McGowan ◽  
Larkin Kerwin
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Ion Beam ◽  
Collision Induced Dissociation ◽  
Ion Molecule Reactions ◽  
Collision Region ◽  
Mean Lifetime ◽  
New States ◽  
Product Ions

The role of some excited ions in laboratory ion–molecule reactions has been investigated, and their possible importance in the upper atmosphere considered. The mass spectrometer techniques of Aston banding and of comparing I.P. curves of parent and product ions have been applied to studies of collision-induced dissociation and charge exchange of oxygen and nitrogen in their parent gas. In every case studied, cross sections depended markedly upon the presence in the ion beam of ions in metastable or long-lived radiative states. In order that an ion reach the collision region, it had to have a mean lifetime greater than 3 μsec.The a 4Πu and b 4Σg excited states of O2+ were identified in the collision[Formula: see text]Higher states of O2+, which have not as yet been identified spectroscopically, were found in the collision[Formula: see text]The thresholds of these new states are 23.9, 27.9, 31.3, and 34.1 eV with an uncertainty ±0.2 eV. From the collision-induced dissociation of N2+, the A 2Πu and the [Formula: see text] states have been identified. Also, the reported transfer of the ν = 3 level of the B [Formula: see text] to the ν = 14 level of the A 2Πu was found.The cross section for 10/01 charged exchange of N2+ in N2 exhibited a marked decrease as excited-state ions diluted the beam. The 10/01 collisions of N+ in N2 and O+ in O2 exhibited an increase in cross section as metastables were added to the parent ion beam. The 10/20 reaction of O2+ in O2 was also observed to depend on excited O2+ ions.

Thermodynamics and transport properties of thermal plasmas: the role of electronic excitation

2009 ◽  
Vol 42 (19) ◽  
pp. 194005 ◽  
Author(s):  
M Capitelli ◽  
D Bruno ◽  
G Colonna ◽  
C Catalfamo ◽  
A Laricchiuta
Keyword(s):  
Transport Properties ◽  
Electronic Excitation ◽  
Thermal Plasmas

Role of electronic excitation in phase-change memory materials: A brief review

2012 ◽  
Vol 249 (10) ◽  
pp. 1861-1866 ◽  
Author(s):  
X.-B. Li ◽  
X. Q. Liu ◽  
X. D. Han ◽  
S. B. Zhang
Keyword(s):  
Phase Change ◽  
Electronic Excitation ◽  
Phase Change Memory ◽  
Change Memory
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