Elastic Photon Scattering Cross Section for the H− Ion in the Asymptotic Approximation

1975 ◽  
Vol 53 (22) ◽  
pp. 2502-2505
Author(s):  
Frederick W. King
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Asymptotic Approximation ◽  
Scattering Cross Section ◽  
Photon Scattering ◽  
Scattering Cross ◽  
The Cross ◽  
Dipole Length

A comparison is made between the calculation of the elastic photon scattering differential cross section for the H− ion in the asymptotic approximation, employing both the dipole length and dipole velocity formulations. The divergence of the cross section using the dipole velocity formulation is discussed.

Differential cross-section measurements in positron–argon collisions

1996 ◽  
Vol 74 (7-8) ◽  
pp. 505-508 ◽  
Author(s):  
R. M. Finch ◽  
Á. Kövér ◽  
M. Charlton ◽  
G. Laricchia
Keyword(s):  
Elastic Scattering ◽  
Differential Cross Section ◽  
Inelastic Scattering ◽  
Energy Range ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Coupling Effect ◽  
Channel Coupling ◽  
Scattering Cross

Differential cross sections for elastic scattering and ionization in positron–argon collisions as a function of energy (40–150 eV) are reported at 60°. Of particular interest is the energy range 55–60 eV, where earlier measurements by the Detroit group found a drop in the elastic-scattering cross section of a factor of 2. This structure has been tentatively attributed to a cross channel-coupling effect with an open inelastic-scattering channel, most likely ionization. Our results indicate that ionization remains an important channel over the same energy range and only begins to decrease at an energy above 60 eV.

scholarly journals Evaluation of the Compton (Incoherent) and Rayleigh (Coherent) Differential Cross Sections of Scattering for Rhodium 103Rh45 and Tantalum181Ta73 by Employing CSC model

2012 ◽  
Vol 9 (3) ◽  
pp. 554-558 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Form Factors ◽  
Differential Cross Sections ◽  
The Cross

The differential cross section for the Rhodium and Tantalum has been calculated by using the Cross Section Calculations (CSC) in range of energy(1keV-1MeV) . This calculations based on the programming of the Klein-Nashina and Rayleigh Equations. Atomic form factors as well as the coherent functions in Fortran90 language Machine proved very fast an accurate results and the possibility of application of such model to obtain the total coefficient for any elements or compounds.

Effective-photon scattering cross-section

1978 ◽  
Vol 22 (12) ◽  
pp. 484-488
Author(s):  
R. P. Gupta ◽  
E. Panarella
Keyword(s):  
Cross Section ◽  
Scattering Cross Section ◽  
Photon Scattering ◽  
Scattering Cross

scholarly journals Wγ AND Zγ PRODUCTION AND LIMITS ON ANOMALOUS WWγ, ZZγ AND Zγγ COUPLINGS WITH D0 DETECTOR

2012 ◽  
Vol 27 (14) ◽  
pp. 1230014
Author(s):  
XUEBING BU
Keyword(s):  
Transverse Momentum ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Final States ◽  
The Cross ◽  
The Difference ◽  
Charged Leptons ◽  
D0 Detector

The recent D0 results on Wγ and Zγ production are presented. First, the cross-section and the difference in rapidities between photons and charged leptons for inclusive W(→lν)+γ production in eγ and μγ final states are discussed, then are the cross-section and differential cross-section as a function of photon transverse momentum for Zγ→l+l-(l = e, μ) process. Finally, I present the limits on anomalous WWγ, ZZγ and Zγγ couplings.

Differential Cross Section for Coherent Photon Scattering fromHe4at 180 MeV

1986 ◽  
Vol 57 (8) ◽  
pp. 972-975 ◽  
Author(s):  
E. J. Austin ◽  
E. C. Booth ◽  
E. K. McIntyre ◽  
J. P. Miller ◽  
B. L. Roberts ◽  
...  
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Photon Scattering

The reaction 15N(e, t0) between 20 and 25 MeV

1979 ◽  
Vol 57 (7) ◽  
pp. 1059-1062 ◽  
Author(s):  
J. Uegaki ◽  
J. Asai ◽  
M. K. Leung ◽  
J. J. Murphy II ◽  
Y. M. Shin ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Virtual Photon ◽  
Separation Energy ◽  
Excitation Energies ◽  
Data Comparison ◽  
Lower Excitation ◽  
The Cross

The differential cross section for the reaction 15N(γ, t0) at θlab = 90° has been obtained for excitation energies between 20 and 25 MeV by the measurement of a triton energy spectrum from the reaction 15N(e, t0)e′12C. A virtual photon analysis was used to extract the photodisintegration cross section from the electrodisintegration data. Comparison of this cross section to the cross section at lower excitation energies shows that the 15N(γ, t0) strength is concentrated in the region between 16 and 21 MeV. Comparison of the (γ, t0) cross section with those of other photodisintegration channels suggests an isospin separation energy of 6 MeV.

Second Born approximation to the Bremsstrahlung differential cross-section

1959 ◽  
Vol 253 (1272) ◽  
pp. 103-120 ◽  
Keyword(s):  
Differential Cross Section ◽  
Pair Production ◽  
Cross Section ◽  
Coulomb Potential ◽  
Differential Cross ◽  
Born Approximation ◽  
Yukawa Potential ◽  
Final States ◽  
The Cross ◽  
Cross Section Differential

In this paper we calculate the second Born approximation contribution to the Bremsstrahlung cross-section differential in both the photon and electron angles. This is divergent if a Coulomb potential is considered, but it is found, on following the idea of Dalitz (1951), that all observable quantities turn out to be finite when we perform the calculation for a Yukawa potential and take the limit of zero screening. It is shown that this is true to order Z 3 in the differential cross-section before it is averaged over spins, and the cross-section is calculated explicitly for the case of an unpolarized beam when the final states of polarization are not observed. Further, it is pointed out that the same methods can be applied satisfactorily in the case of pair production.

The Neutrino Reaction in 3H

1998 ◽  
Vol 07 (02) ◽  
pp. 275-285
Author(s):  
S. L. Mintz ◽  
G. M. Gerstner ◽  
M. A. Barnett ◽  
M. Pourkaviani
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Form Factors ◽  
Individual Form ◽  
Neutrino Reaction ◽  
The Cross ◽  
The Individual ◽  
Sharp Minima

We calculate the cross sections for the reactions, νe+3 H → e-+3 He , and νμ+3 H → μ-+3 He from threshold to 1 GeV. We obtain typical contributions of the individual form factors as well as the interference terms to the cross sections. We find that the cross sections for these processes are extremely large for a number of reasons, making them worthy of consideration for possible experiments. We also obtain a typical differential cross section and note the presence of sharp minima for high neutrino energies.

Regge Pole Plus Background Model of Backward πp Scattering

1974 ◽  
Vol 52 (13) ◽  
pp. 1155-1159
Author(s):  
S. Kogitz ◽  
R. K. Logan
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Differential Cross ◽  
Regge Pole ◽  
Background Model ◽  
Cross Section Data ◽  
Section Data ◽  
The Cross ◽  
Exchange Scattering

We present a model of backward π+p, π−p, and π−p charge exchange scattering consistent with our earlier approach to forward π−p charge exchange and backward π+p. We consider two body differential cross section data which exhibits a dip–bump structure as well as nonzero polarization. This is explained in terms of a dominant Regge pole vanishing at the dip accompanied by a background. The background is primarily responsible for the large u behavior of the cross section which includes the rise after the dip. It is assumed that the presence of nonzero polarization dictates this behavior. We isolate the I = 3/2 amplitude in π−p backwards and determine the I = 1/2 amplitude from π+p backwards. A prediction for π−p → nπ0 follows.

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