Angular distributions of the 12C(e,p)e′ reaction at Ee = 200 MeV

1981 ◽  
Vol 59 (2) ◽  
pp. 271-274 ◽  
Author(s):  
G. J. Lolos ◽  
S. Hontzeas ◽  
R. M. Sealock
Keyword(s):  
Electron Energy ◽  
Cross Sections ◽  
Differential Cross ◽  
Proton Energy ◽  
Incident Electron ◽  
Incident Electron Energy ◽  
Angular Distributions ◽  
Differential Cross Sections ◽  
Good Agreement

Double differential cross sections at six angles ranging from 45° to 143° have been measured for the 12C(e,p)e′ reaction. The proton energy ranged from 15.6 to 17.2 MeV at an incident electron energy of 200 MeV. At the backward angles our results are in good agreement with data reported by Vysotskaya and Afanas'ev but for forward angles the results are lower.

Pion electroproduction from and near threshold

1983 ◽  
Vol 61 (8) ◽  
pp. 1227-1230
Author(s):  
Edward T. Dressler
Keyword(s):  
Theoretical Model ◽  
Electron Energy ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Incident Electron Energy ◽  
Differential Cross Sections ◽  
Text Data ◽  
Pion Energy ◽  
Good Agreement

The differential cross sections for [Formula: see text], n and [Formula: see text], 2n are calculated and compared with some recent data (Caplan and Sealock, manuscript in preparation). The theoretical model in this calculation uses essentially the same approximations as were used by Dressier et al. (1979) for the [Formula: see text] total threshold cross section. The results of this new calculation are in good agreement with the [Formula: see text], n data. However, comparing our results to the [Formula: see text] data at an incident electron energy of 200 MeV and a pion energy of 15 MeV seems to indicate that the [Formula: see text], 2n calculation somewhat overestimates this cross section.

Electroproduction of low energy π+ from 3He

1982 ◽  
Vol 60 (9) ◽  
pp. 1257-1260
Author(s):  
R. M. Sealock ◽  
H. S. Caplan ◽  
B. W. Zulkoskey ◽  
A. Szyjewicz ◽  
E. L. Tomusiak
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Incident Energy ◽  
Pion Production ◽  
Low Energy ◽  
Angular Distributions ◽  
Differential Cross Sections ◽  
Channel Calculation ◽  
Good Agreement

Differential cross sections were measured for the electro-pion production from H and 3He at an incident energy of 200 MeV and pion energies from 7.3 to 12.1 MeV. Pion-angular distributions are presented and compared with theory. For hydrogen there is good agreement. A simple three-channel calculation performed for the pion production from 3He was found to overestimate the cross section at forward pion angles.

Analysing powers and differential cross sections of (3He,p) reactions on 6Li and 7Li at low energy

1995 ◽  
Vol 73 (1-2) ◽  
pp. 74-84 ◽  
Author(s):  
D. Baddou ◽  
C. Rioux ◽  
R. J. Slobodrian ◽  
J. M. Nelson
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Born Approximation ◽  
Low Energy ◽  
Angular Distributions ◽  
Differential Cross Sections ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
Nucleon Transfer ◽  
Cluster Transfer

Angular distributions of the differential cross sections and analysing powers were measured at an energy of 4.6 MeV. The results are compared with the distorted wave Born approximation predictions for two-nucleon transfer and for a deuteron-cluster transfer. The agreement is qualitative at best, and a discussion of alternatives to improve it is presented.

The reaction 7Li(e, 3H)4He,e′ between 6 and 15 MeV

1977 ◽  
Vol 55 (3) ◽  
pp. 252-253 ◽  
Author(s):  
M. K. Leung ◽  
J. J. Murphy II ◽  
Y. M. Shin ◽  
D. M. Skopik
Keyword(s):  
Energy Range ◽  
Electron Energy ◽  
Cross Sections ◽  
Electric Dipole ◽  
Incident Electron ◽  
Incident Electron Energy ◽  
Sum Rule

Tritons resulting from the electrodisintegration of 7Li have been measured at 90° for an incident electron energy of 23.8 MeV over an energy range which ensured that only tritons emitted in the two-body channel were detected. The electrodisintegration cross sections were converted to equivalent photodisintegration data and compared to earlier results. Large discrepancies are observed. It is found that the (γ,3H) channel contributes appreciably to the electric dipole sum rule for 7Li.

scholarly journals D(d,n)3He Differential Cross Sections from 18 to 26 MeV

1980 ◽  
Vol 33 (2) ◽  
pp. 203 ◽  
Author(s):  
AB Jones
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Angular Distributions ◽  
Differential Cross Sections ◽  
Broad Level

Angular distributions of the D(d, n)3He reaction have been measured for incident deuteron energies of 18, 20, 22, 24 and 26 MeV. The data provide no evidence for the proposed broad level in 4He at approximately 30 MeV.

scholarly journals Electron Scattering from the Ground and Excited States of Barium

1999 ◽  
Vol 52 (3) ◽  
pp. 603
Author(s):  
Dmitry V. Fursa
Keyword(s):  
Excited States ◽  
Electron Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Ground State ◽  
Differential Cross Sections ◽  
Close Coupling ◽  
Angular Correlations ◽  
Electron Photon ◽  
Good Agreement

We have used the nonrelativistic convergent close-coupling (CCC) method to investigate electron scattering from the ground (6s2)1S state and excited (6s6p)1 Po1 and (6s5d)1,3De2 states of barium. For the scattering from the barium ground state, we have found very good agreement with measurements of (6s6p)1 Po1 apparent cross sections at all energies. Similarly, good agreement is found for differential cross sections for elastic scattering and (6s6p)1 Po and (6s5d)1 De2 excitations and with the (6s6p)1 Po1 state electron{photon angular correlations. For the scattering from excited states of barium we have found good agreement with elastic (6s6p)1 Po1 scattering and the (6s5d)1De2 → (6s6p)1 Po1 transition for both differential cross sections and electron–photon angular correlations.

scholarly journals Deconvolution of Overlapping Features in Electron Energy-loss Spectra: Determination of Absolute Differential Cross Sections for Electron-impact Excitation of Electronic States of Molecules

1997 ◽  
Vol 50 (3) ◽  
pp. 525 ◽  
Author(s):  
L. Campbell ◽  
P. J. O. Teubner ◽  
M. J. Brunger ◽  
B. Mojarrabi ◽  
D. C. Cartwright
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Cross Sections ◽  
Differential Cross ◽  
Electronic States ◽  
Impact Excitation ◽  
Spectroscopic Constants ◽  
Differential Cross Sections ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

A set of three computer programs is reported which allow for the deconvolution of overlapping molecular electronic state structure in electron energy-loss spectra, even in highly perturbed systems. This procedure enables extraction of absolute differential cross sections for electron-impact excitation of electronic states of diatomic molecules from electron energy-loss spectra. The first code in the sequence uses the Rydberg–Klein–Rees procedure to generate potential energy curves from spectroscopic constants, and the second calculates Franck–Condon factors by numerical solution of the Schrödinger equation, given the potential energy curves. The third, given these Franck–Condon factors, the previously calculated relevant energies for the vibrational levels of the respective electronic states (relative to the v″ = 0 level of the ground electronic state) and the experimental energy-loss spectra, extracts the differential cross sections for each state. Each program can be run independently, or the three can run in sequence to determine these cross sections from the spectroscopic constants and the experimental energy-loss spectra. The application of these programs to the specific case of electron scattering from nitric oxide (NO) is demonstrated.

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