Extraction of the centre-of-mass differential cross section from crossed laser molecular beam time of flight data using the inverse quadrature method

1988 ◽  
Author(s):  
G. Bandukwalla ◽  
M. Vernon
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Molecular Beam ◽  
Time Of Flight ◽  
Quadrature Method ◽  
Centre Of Mass ◽  
Flight Data

scholarly journals Reactive Scattering of Oxygen Atoms With Bromine Molecules

1988 ◽  
Vol 9 (4-6) ◽  
pp. 265-276 ◽  
Author(s):  
N. C. Firth ◽  
N. W. Keane ◽  
D. J. Smith ◽  
R. Grice
Keyword(s):  
Angular Distribution ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Rotational Motion ◽  
Correlation Time ◽  
Cross Correlation ◽  
Translational Energy ◽  
Reactive Scattering ◽  
Centre Of Mass

Reactive scattering of O atoms with Br2 molecules has been studied at an initial translational energy E~35 kJ mol−1 using cross-correlation time-of-flight analysis with resolution improved over previous measurements. The centre-of-mass differential cross section peaks in the forward and backward directions with a higher product translational energy for backward Scattering. The angular distribution traced at the peak of the product velocity distribution peaks more sharply in the forward than the backward direction but the angular distribution of product flux shows a distribution which is more nearly symmetrical about θ = 90°. The observed scattering is attributed to a triplet OBrBr complex intermediate with a lifetime which is shorter than the period of overall rotation of the axis of the heavy BrBr diatomic but which is long compared with the period of vibrational and rotational motion of the light O atom.

scholarly journals Neutron-proton scattering at 156±3 MeV

1952 ◽  
Vol 213 (1114) ◽  
pp. 392-399 ◽  
Keyword(s):  
Angular Distribution ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Proton Scattering ◽  
Centre Of Mass ◽  
Minimum Value

The angular distribution for neutron-proton scattering at 156 ± 3 MeV has been determined for centre-of-mass scattering angles between 50 and 178°. The ratio σ(π) / σ (1/2 π ) is 5·0, and the minimum value of the differential cross-section occurs at an angle between 75 and 85°.

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