Photo-ionization of the helium atom close to the double-ionization threshold: Towards the Ericson regime

1997 ◽  
Vol 40 (4) ◽  
pp. 363-368 ◽  
Author(s):  
B Grémaud ◽  
D Delande
Keyword(s):  
Helium Atom ◽  
Double Ionization ◽  
Ionization Threshold ◽  
Photo Ionization

Photoionization phenomena near the double-ionization threshold of helium

1991 ◽  
Vol 24 (1) ◽  
pp. 115-125 ◽  
Author(s):  
R I Hall ◽  
L Avaldi ◽  
G Dawber ◽  
M Zubek ◽  
K Ellis ◽  
...  
Keyword(s):  
Double Ionization ◽  
Ionization Threshold

Electron-impact double ionization of a model helium atom

1999 ◽  
Vol 59 (6) ◽  
pp. 4390-4398 ◽  
Author(s):  
M. S. Pindzola ◽  
D. Mitnik ◽  
F. Robicheaux
Keyword(s):  
Electron Impact ◽  
Helium Atom ◽  
Double Ionization

scholarly journals Time-dependent effects in the nonsequential ionization of helium at various wavelengths

2000 ◽  
Vol 18 (3) ◽  
pp. 433-441
Author(s):  
P.P. CORSO ◽  
D.G. LAPPAS ◽  
P.L. KNIGHT
Keyword(s):  
Laser Pulse ◽  
Helium Atom ◽  
Pulse Duration ◽  
Yield Curve ◽  
Underlying Mechanism ◽  
Double Ionization ◽  
Time Dependent ◽  
Short Pulses ◽  
Double Electron ◽  
Electron Ejection

Calculations of the double ionization of a model 1D helium atom interacting with an intense short laser pulse are presented. A substantial signature of nonsequential double ionization is found for all the wavelengths that are considered, from 248 nm to 1064 nm, provided that sufficiently short pulses are employed. We show how one can modify the size of the “knee” structure of the double ionization yield curve by varying the laser pulse duration. The underlying mechanism of the correlated double electron ejection is investigated and discussed.

Selection rules in the few-photon double ionization of the helium atom

2011 ◽  
Vol 44 (17) ◽  
pp. 175601 ◽  
Author(s):  
Hongcheng Ni ◽  
Shaohao Chen ◽  
Camilo Ruiz ◽  
Andreas Becker
Keyword(s):  
Helium Atom ◽  
Double Ionization ◽  
Selection Rules

Interchannel interactions and series quenching in the 5d and 6s spectra of Pb I

1977 ◽  
Vol 357 (1691) ◽  
pp. 499-512 ◽  
Keyword(s):  
Absorption Spectrum ◽  
Double Ionization ◽  
Low Energy ◽  
Ionization Threshold ◽  
In Series ◽  
Channel Interactions ◽  
Spectator Model

The absorption spectrum of lead vapour in the range 320-1070 A has been obtained. More than 60 transitions have been, found, mostly arrangable in series, which are due to excitation of either a 5d or 6s electron. Pronounced inter-channel interactions occur, similar to those in the corresponding spectrum of Tl I. Our observations confirm the applicability of a ‘ spectator model ’ for 6s excitation. The comparatively low energy of the double ionization threshold results in quenching of all but one 5d excitation series.

Photo Conductivity of Liquid Tetramethylsilane

1978 ◽  
Vol 33 (11) ◽  
pp. 1393-1394 ◽  
Author(s):  
W . F. Schmidt ◽  
W. Döldissen ◽  
U. Hahn ◽  
E. E. Koch
Keyword(s):  
Wave Length ◽  
Ionization Threshold ◽  
Photo Conductivity ◽  
Photo Ionization

Intrinsic photo conductivity of liquid tetramethylsilane was observed in the wave length region from 1100 to 1500 Å. The photo ionization threshold EL has been determined to be EL = 8.1 eV.

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