An inelastic threshold in electron - alkali cluster collisions

2001 ◽  
Vol 16 (1) ◽  
pp. 99-102 ◽  
Author(s):  
V. Kasperovich ◽  
K. Wong ◽  
G. Tikhonov ◽  
V.V. Kresin
Keyword(s):  

2009 ◽  
Vol 24 (02n03) ◽  
pp. 549-552 ◽  
Author(s):  
LEONARD LEŚNIAK

New formulae for the resonant scattering and the production amplitudes near an inelastic threshold are derived. It is shown that the Flatté formula, frequently used in experimental analyses, is not sufficiently accurate. Its application to data analysis can lead to a substantial distortion of the effective mass spectra and of the resonance pole positions. A unitary parameterization, satisfying a generalized Watson theorem for the production amplitudes, is proposed. It can be easily applied to study production processes, multichannel meson-meson interactions and the resonance properties, including among others the scalar resonances a0(980) and f0(980).



2011 ◽  
Vol 87 (8) ◽  
pp. 509-517 ◽  
Author(s):  
Sinya AOKI ◽  
Noriyoshi ISHII ◽  
Takumi DOI ◽  
Tetsuo HATSUDA ◽  
Yoichi IKEDA ◽  
...  


2008 ◽  
Author(s):  
L. Leśniak ◽  
George Rupp ◽  
Eef van Beveren ◽  
Pedro Bicudo ◽  
Brigitte Hiller ◽  
...  


1963 ◽  
Vol 10 (6) ◽  
pp. 268-268 ◽  
Author(s):  
A. Temkin ◽  
R. Pohle




1991 ◽  
Vol 67 (27) ◽  
pp. 3761-3763 ◽  
Author(s):  
S. R. Lorentz ◽  
R. E. Scholten ◽  
J. J. McClelland ◽  
M. H. Kelley ◽  
R. J. Celotta


The Kapur-Peierls resonance formalism adapted for electron scattering by atomic systems is modified to allow for the exclusion principle, and a variational principle is derived for calculating the complex resonance energies. The theory is applied to calculate the first four resonance levels in the 1 S state of the electron/atomic hydrogen system by using a trial wave function made up from singleparticle functions which are modified (1 s ), (2 s ) and (2 p ) hydrogen wave functions. We find two levels (at approximately — 13 and — 10 eV) whose widths are of the order of a few volts. There are also two levels (at about — 3 and 0 eV) which have very narrow widths, less than 10 -2 eV, if they occur below the inelastic threshold, shooting up to widths of several volts at threshold. Such a narrow level occurs if the resonant state is energetically unable to decay to a state of the residual atom of which it contains a substantial component.



1976 ◽  
Vol 65 (5) ◽  
pp. 475-479 ◽  
Author(s):  
J. Dias De Deus ◽  
T. Shimada


1963 ◽  
Vol 10 (1) ◽  
pp. 22-25 ◽  
Author(s):  
A. Temkin ◽  
R. Pohle


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