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.

Angular distributions of recoil products from some reactions induced in 65Cu and 197Au by protons of energy 30–85 MeV

1968 ◽  
Vol 46 (22) ◽  
pp. 3551-3563 ◽  
Author(s):  
M. K. Dewanjee ◽  
G. B. Saha ◽  
L. Yaffe
Keyword(s):  
Angular Distribution ◽  
Inelastic Scattering ◽  
Center Of Mass ◽  
Interaction Mechanism ◽  
Direct Interaction ◽  
Low Energy ◽  
Angular Distributions ◽  
Approximate Symmetry ◽  
Mass System ◽  
Model Calculations

Angular distributions of products formed in the reactions 65Cu(p,pn)64Cu, 197Au(p,pn)I96Au, and 197Au(p,p3n)194Au in the range of proton energy 30–85 MeV were studied. The angular distribution results of 64Cu and 196Au show forward peaking at low energy and sidewise peaking at higher energies. Approximate symmetry about 90° was observed for the angular distribution of 194Au in the center-of-mass system. The experimental results have been compared with (a) Monte Carlo evaporation calculations, (b) cascade–evaporation calculations at 85 MeV for 64Cu, and (c) inelastic scattering plus evaporation calculations.Good agreement was obtained with statistical theory calculations at low energy and inelastic scattering model calculations at higher energies. The comparisons indicate that the reactions proceed by the compound nucleus mechanism at lower energies and the direct interaction mechanism predominates at higher energies.

Angular Distribution of Rotons Generated by Alpha Particles in Superfluid Helium: A Possible Tool for Low Energy Particle Detection

1995 ◽  
Vol 74 (16) ◽  
pp. 3169-3172 ◽  
Author(s):  
S. R. Bandler ◽  
S. M. Brouër ◽  
C. Enss ◽  
R. E. Lanou ◽  
H. J. Maris ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Superfluid Helium ◽  
Alpha Particles ◽  
Low Energy ◽  
Energy Particle ◽  
Particle Detection

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 ANGULAR DISTRIBUTION OF FAST PHOTONEUTRONS FOR NUCLIDES WITH N ABOUT 56

1967 ◽  
Vol 45 (9) ◽  
pp. 2851-2857
Author(s):  
S. M. Hussain ◽  
K. G. McNeill
Keyword(s):  
Angular Distribution ◽  
Angular Distributions

Measurements have been made of the angular distributions of fast (E > 5 MeV) photoneutrons from eight elements in the region Z = 28 to Z = 50, and from lead, using threshold detectors. It is found that there is evidence for peaking of the anisotropy of these photoneutrons at the closing of the. N = 56 subshell.

The angular distribution of scattered and sputtered 40-keV particles on polycrystalline targets

1968 ◽  
Vol 46 (6) ◽  
pp. 753-758 ◽  
Author(s):  
E. Formann ◽  
F. P. Viehböck ◽  
H. Wotke
Keyword(s):  
Angular Distribution ◽  
Activation Analysis ◽  
Hard Sphere ◽  
Ion Beam ◽  
Radioactive Tracer ◽  
Angular Distributions ◽  
Tracer Technique ◽  
Potential Approximation ◽  
Radioactive Tracer Technique ◽  
Graphite Rods

Based on the hard-sphere potential approximation, angular distributions of scattered particles at different mass ratios M1:M2 were calculated. The results were compared with experiments carried out with the following atoms:[Formula: see text]The sputtered particles from the target as well as from the incident-ion beam were collected on graphite rods and measured by either activation analysis or a radioactive tracer technique.

Sputtering Angular Distributions of Individual Elements for Low-Energy Ar Ion Irradiation of PtCu Alloy

1991 ◽  
Vol 8 (1) ◽  
pp. 44-47 ◽  
Author(s):  
Zheng Liping ◽  
Li Risheng ◽  
Li Mingyao ◽  
Shen Weizu ◽  
Lin Junying ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Low Energy ◽  
Angular Distributions ◽  
Ptcu Alloy

scholarly journals p-Wave Strength in the Low-energy 7Li(p,?0)8Be Cross Section

1995 ◽  
Vol 48 (5) ◽  
pp. 813 ◽  
Author(s):  
FC Barker
Keyword(s):  
Angular Distribution ◽  
Shell Model ◽  
Cross Section ◽  
Low Energy ◽  
P Wave ◽  
Model Calculations ◽  
Energy Data

Recent fits to low-energy 7Li(p, "Yo)8Be angular distribution and analysing power data suggested a large p-wave strength. It is shown that acceptable fits to the data can be obtained by attributing the p-wave Ml contributions to the tails of the 17 �64 and 18 �15 MeV 1+ levels of 8Be, with p-wave strengths much less than those obtained previously, but only if some of the spectroscopic amplitudes have signs opposite to those suggested by shell model calculations and/or a fit to higher-energy data.

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