New cross‐beam technique for charge transfer cross section measurement using a pulsed ion beam produced by laser photoionization

1990 ◽  
Vol 61 (12) ◽  
pp. 3678-3685 ◽  
Author(s):  
Shuji Sakabe ◽  
Yasukazu Izawa ◽  
Masaki Hashida ◽  
Toshihiro Naka ◽  
Tomokazu Sudo ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Cross Section ◽  
Ion Beam ◽  
Cross Section Measurement ◽  
Charge Transfer Cross Section ◽  
Section Measurement ◽  
Laser Photoionization ◽  
Beam Technique

Modified crossed‐beam apparatus for charge‐transfer cross section measurement

1994 ◽  
Vol 65 (4) ◽  
pp. 877-881 ◽  
Author(s):  
M. Hashida ◽  
S. Sakabe ◽  
Y. Izawa ◽  
S. Nakai ◽  
C. Yamanaka
Keyword(s):  
Charge Transfer ◽  
Cross Section ◽  
Cross Section Measurement ◽  
Charge Transfer Cross Section ◽  
Section Measurement

An experimental study of charge transfer in proton-atomic hydrogen collisions at impact energies above 40 keV

1966 ◽  
Vol 291 (1426) ◽  
pp. 438-443 ◽  
Keyword(s):  
Charge Transfer ◽  
Proton Beam ◽  
Excited States ◽  
Cross Section ◽  
Cross Sections ◽  
Atomic Hydrogen ◽  
Total Cross Sections ◽  
Charge Transfer Cross Section ◽  
Impact Energies ◽  
Beam Technique

The crossed beam technique has been used to study charge transfer in proton-atomic hydrogen collisions between 40 and 130 keV. A proton beam from a Van de Graaff accelerator was arranged to intersect a modulated beam of atomic hydrogen derived from a furnace source. The flux of fast neutral atoms produced by charge transfer in the beam intersection region was measured by a method based on double electrostatic deflexion of the proton beam. The ratio of the charge transfer cross section Q 1 in atomic hydrogen to that in molecular hydrogen Q 2 was determined by comparing the signals when the beam from the furnace was mainly atomic and when the beam was entirely molecular. Above 50 keV, measured ratios Q 1 / Q 2 were consistently less than ½. Absolute values of Q 1 , which represent total cross sections for capture into all states of atomic hydrogen, were obtained by reference to known values of Q 2 . Above 50 keV, the results agree fairly well with theoretical values due to Jackson & Schiff. When considered in conjunction with the low energy data of Fite and his collaborators, the results suggest that capture into excited states in the range 20 to 50 keV occurs to a greater extent than that predicted by Jackson & Schiff.

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