A coupled channels approach to Penning ionization of Ar BY He*(Is2s, 3S)

A quantum mechanical theory for the ℏω+AB→A+B++e- three body breakup is presented. The theory is based on the Continuum Coupled Channels expansion (CCC) in which the three body wave-function is expanded in terms of square integrable and (flux carrying) continuum states. The theory consistently treats the accompanying processes of three body inelastic collisions, dissociative attachment and Penning ionization. Applications to the dissociative photoionization of H2 and HD are presented. The relevant equations are solved exactly using the Artificial Channel method. Excellent agreement is obtained with experiment, concerning the proton kinetic energy distribution.

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Coupling of discrete and continuum electronic states in atom-atom collisions: A coupled-channels investigation of Penning ionization inHe*(1s2s, S3)+ Ar

Physical Review A ◽

10.1103/physreva.18.1435 ◽

1978 ◽

Vol 18 (4) ◽

pp. 1435-1447 ◽

Cited By ~ 13

Author(s):

John C. Bellum ◽

David A. Micha

Keyword(s):

Electronic States ◽

Penning Ionization ◽

Coupled Channels

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DETERMINATION OF THE TRANSITION MATRIX WITH N-COUPLED CHANNELS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1989113 ◽

1989 ◽

Vol 50 (C1) ◽

pp. C1-119-C1-125 ◽

Cited By ~ 1

Author(s):

S. BOUGOUFFA ◽

X. C. CAO

Keyword(s):

Transition Matrix ◽

Coupled Channels

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Convergence Properties of Quasiclassical Trajectory Calculations on Dynamics of Autoionization Event in He(23S)-D2 Penning Ionization

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19970154 ◽

1997 ◽

Vol 62 (2) ◽

pp. 154-171 ◽

Cited By ~ 1

Author(s):

Jan Vojtík ◽

Richard Kotal

Keyword(s):

Branching Ratios ◽

Classical Trajectory ◽

Vibrational States ◽

Penning Ionization ◽

Trajectory Calculations ◽

Quantum Mechanical Treatment ◽

Total Ionization ◽

Vibrational Levels ◽

Degree Of Convergence ◽

Product Branching

An analysis of the degree of convergence of theoretical pictures of the dynamics of the autoionization event He(23S)-D2(v" = 0) -> [He...D2+(v')] + e is presented for a number of batches of Monte Carlo calculations differing in the number of the trajectories run. The treatment of the dynamics consists in 2D classical trajectory calculations based on static characteristics which include a quantum mechanical treatment of the perturbed D2(v" = 0) and D2+(v') vibrational motion. The vibrational populations are dynamical averages over the local widths of the He(23S)-D2(v" = 0) state with respect to autoionization to D2+(...He) in its v'th vibrational level and the Penning electron energies are related to the local differences between the energies of the corresponding perturbed D2(v" = 0)(...He*) and D2+(v')(...He) vibrational states. Special attention is paid to the connection between the requirements on the degree of convergence of the classical trajectory picture of the event and the purpose of the calculations. Information is obtained regarding a scale of the trajectory calculations required for physically sensible applications of the model to an interpretation of different type of experiments on the system: total ionization cross section measurements, Penning ionization electron spectra, subsequent 3D classical trajectory calculations of branching ratios of the products of the postionization collision process, and interpretation of electron ion coincidence measurements of the product branching ratios for individual vibrational levels of the nascent Penning ion.

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MICROSCOPIC APPROACH TO SCATTERING OF UNSTABLE NUCLEI

Modern Physics Letters A ◽

10.1142/s0217732310000253 ◽

2010 ◽

Vol 25 (21n23) ◽

pp. 1754-1758

Author(s):

MASANOBU YAHIRO ◽

KOSHO MINOMO ◽

KAZUYUKI OGATA ◽

YOSHIFUMI R. SHIMIZU ◽

TAKUMA MATSUMOTO ◽

...

Keyword(s):

Energy Range ◽

Incident Energy ◽

Optical Potential ◽

Recent Progress ◽

Proton Scattering ◽

Microscopic Approach ◽

Unstable Nuclei ◽

Coupled Channels ◽

Localized Form

This article is composed of three subjects. First, the relation between the method of continuum-discretized coupled channels (CDCC) and the Faddeev theory is clarified to show the validity of CDCC. Second, CDCC is applied to four-body reactions such as (6 He , nn 4 He ) as an example of recent progress in CDCC. Third, we propose a microscopic version of CDCC in which a localized form of the microscopic nucleon-nucleus optical potential is used as an input of CDCC calculation instead of the phenomenological optical potential commonly used. The validity of the Brieva-Rook localization is shown for the proton scattering in a wide incident-energy range.

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