scholarly journals Angular Distribution of Hydrogen Fragment Ions in H+ - H2 Collisions

1999 ◽  
Vol 52 (3) ◽  
pp. 537
Author(s):  
Bärbel Siegmann ◽  
Rainer Hippler
Keyword(s):  
Angular Distribution ◽  
Energy Range ◽  
Electron Capture ◽  
Angular Distributions ◽  
Fragment Ions ◽  
H2 Molecule

The angular distribution of H+ fragment ions produced in 5–25 keV H+–H2 collisions was investigated in coincidence with Lyman-α photons. The observed photons arise from electron capture to the projectile H(2p) state and/or from the fragmentation of the H2 molecule via 2sσg, 2pσu or 2pΠ u states of the excited H+2* ion. An analysis of the measured angular distributions has been performed to distinguish the separate degenerate channels available to an emitted Lyman-α photon. The results show similarities to the data of Lindsay et al. (1987) who measured the non-coincident angular distribution of H+ fragment ions within the same energy range.

Anisotropy of the angular distribution of fragment ions in dissociative double photoionization of N2O molecules in the 30–50eV energy range

2007 ◽  
Vol 126 (20) ◽  
pp. 201101 ◽  
Author(s):  
M. Alagia ◽  
P. Candori ◽  
S. Falcinelli ◽  
M. Lavollée ◽  
F. Pirani ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Energy Range ◽  
Double Photoionization ◽  
Fragment Ions

The D-D cross-section and angular distribution between 55 and 430 keV

1953 ◽  
Vol 216 (1124) ◽  
pp. 66-71 ◽  
Keyword(s):  
Angular Distribution ◽  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Experimental Error ◽  
Forward Direction ◽  
Angular Distributions ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Gas Targets

The cross-section and angular distributions of protons from the D-D reaction using thin gas targets have been measured from 55 to 430 keV. The results have been expressed in the form σ θ = ( σ /4 π (1+⅓ A +1/5 B )) (1+ A cos 2 θ + B cos 4 θ). The variation of the total cross-section σ and the asymmetry coefficients A and B over the energy range 15 to 190 keV can be described by the theory of Beiduk, Pruett & Konopinski introducing only a small or negligible amount of spin-orbit coupling. The ratio of the number of 3 He’s to 3 H’s has been measured up to 250 keV at a few angles in the forward direction only, and found to be unity within experimental error.

Angular Distribution of α-Particles and Protons from Li6+D2

1951 ◽  
Vol 4 (3) ◽  
pp. 268
Author(s):  
DNF Dunbar ◽  
F Hirst
Keyword(s):  
Angular Distribution ◽  
Energy Range ◽  
Long Range ◽  
Potential Barrier ◽  
Legendre Polynomial ◽  
Short Range ◽  
Deuteron Energy ◽  
Angular Distributions ◽  
Α Particles ◽  
Complete Specification

The angular distribution of α-particles from Li6(d,α)He4 has been investigated for deuteron energies between 200 keV. and 1 MeV. The distribution may be represented by the expression������������������ N(θ)=N(90�)[1+A(E) cos2θ], where A(E) is a function of deuteron energy. The variation of A(E) with energy is due to the increasing penetration of the potential barrier by d deuterons. The angular distributions of the two groups of protons from Li6(d,p)Li7*, Li7 have been investigated in the same energy range. The distributions are complex and require d deuterons for their complete specification in the form �������������� N(θ) = a0P0 + a1P1 = a2P2 = a3P3 = a4P4where Pn is the Legendre polynomial of order n. The results appear to resolve some differences apparent in earlier work. There is no evidence that the short range proton distribution is more complex than that of the long range group.

Angular distributions for electron capture from He by multiply charged C, N, O, F, and Ne ions

1988 ◽  
Vol 37 (7) ◽  
pp. 2386-2392 ◽  
Author(s):  
W. Waggoner ◽  
C. L. Cocke ◽  
L. N. Tunnell ◽  
C. C. Havener ◽  
F. W. Meyer ◽  
...  
Keyword(s):  
Electron Capture ◽  
Angular Distributions ◽  
Multiply Charged

THE ANGULAR DISTRIBUTION OF PHOTOFISSION FRAGMENTS

1959 ◽  
Vol 37 (12) ◽  
pp. 1418-1437 ◽  
Author(s):  
A. P. Baerg ◽  
R. M. Bartholomew ◽  
F. Brown ◽  
L. Katz ◽  
S. B. Kowalski
Keyword(s):  
Angular Distribution ◽  
Low Energy ◽  
Photon Beam ◽  
Angular Distributions ◽  
Bremsstrahlung Energy ◽  
Isotropic Distribution ◽  
Degree Of Anisotropy ◽  
Maximum Bremsstrahlung Energy

Angular distributions of photofission fragments relative to the photon beam have been measured as a function of maximum bremsstrahlung energy in the range 6–20 Mev. The nuclides U-233, U-235, Np-237, Pu-239, and Am-241 give an isotropic distribution at all energies studied. The nuclides Th-232, U-234, U-236, U-238, and Pu-240 give anisotropic distributions which can be described by an equation of the form W(θ) = 1 + α sin2 θ where θ is the angle between fragment and beam. The degree of anisotropy is large at low energy and falls rapidly as the energy is increased. At a given energy Th-232 has the greatest degree of anisotropy and Pu-240 the least.

scholarly journals Angular distributions and anisotropy of fission fragments from neutron-induced fission in intermediate energy range 1–200 MeV

2017 ◽  
Vol 146 ◽  
pp. 04011 ◽  
Author(s):  
Alexander S. Vorobyev ◽  
Alexei M. Gagarski ◽  
Oleg A. Shcherbakov ◽  
Larisa A. Vaishnene ◽  
Alexei L. Barabanov
Keyword(s):  
Energy Range ◽  
Intermediate Energy ◽  
Angular Distributions ◽  
Fission Fragments ◽  
Induced Fission
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