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.

The cross-section and angular distribution of the D-D reactions below 50 keV

1953 ◽  
Vol 216 (1124) ◽  
pp. 57-65 ◽  
Keyword(s):  
Angular Distribution ◽  
Total Cross Section ◽  
Cross Section ◽  
Proportional Counter ◽  
Angular Distributions ◽  
Asymmetry Coefficient ◽  
Gas Target ◽  
The Asymmetry ◽  
The Cross ◽  
Bombarding Energy

A thin gas target was used and the particles from the reactions were detected by a proportional counter. The results show that the total cross-section for the two reactions is the same to within 1%, but that the angular distributions of the products are significantly different. The asymmetry coefficient for the reaction D( d , n ) 3 He is given by 0·31 + 0·0058 E , compared with 0·13 + 0·0047 E for reaction D( d , p ) 3 H, where E is the bombarding energy in kilovolts.

The D-D cross-section and angular distribution below 50 keV

1952 ◽  
Vol 212 (1109) ◽  
pp. 220-234 ◽  
Keyword(s):  
Angular Momentum ◽  
Angular Distribution ◽  
Cross Section ◽  
Coulomb Barrier ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Gas Target ◽  
The Asymmetry ◽  
The Cross

The cross-section and angular distribution of the protons from the D - D reaction have been studied with bombarding energies between 15 and 50 keV using a thin gas target. The cross-section results show a significant deviation from the simple Gamow theory of penetra­tion through a Coulomb barrier. Both this deviation and the asymmetry of the reaction at even the lowest energies can be explained consistently by the contribution to the reaction of waves of non-vanishing angular momentum. Analysis of the results in terms of such waves gives some indication that spin-orbit coupling is a significant factor in the transitions.

DOUBLE PION PHOTOPRODUCTION EXPERIMENT AT LNS–TOHOKU

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2313-2316 ◽  
Author(s):  
◽  
H. KANDA ◽  
N. CHIGA ◽  
Y. FUJII ◽  
K. FUTATSUKAWA ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Cross Sections ◽  
Pion Photoproduction ◽  
Total Cross Sections ◽  
Free Proton ◽  
Double Pion ◽  
The Cross

The total cross sections for the π+π− photoproduction on the deuteron were measured in an energy range of 0.8 to 1.1 GeV. The obtained total cross section for the quasi-free π+π− photoproduction on the deuteron was about 60 % of those on the free proton. The cross section for Δ++Δ− photoproduction was derived from the non-quasi-free π+π− photoproduction events. It was smaller than the previous data.

Molybdenum and AND Zirconium Neutron Total Cross Section Measurements in the Energy Range 0.5 TO 20 MeV

2011 ◽  
Vol 59 (2(3)) ◽  
pp. 1745-1748 ◽  
Author(s):  
M. J. Rapp ◽  
Y. Danon ◽  
F. J. Saglime ◽  
R. Bahran ◽  
R. C. Block ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Neutron Total Cross Section

scholarly journals ENERGY LOSS IN CONDENSED MATTER OF H1 AND He4 IN THE ENERGY RANGE 4 < E < 30 kev

1962 ◽  
Vol 40 (12) ◽  
pp. 1749-1764 ◽  
Author(s):  
Arie Van Wijngaarden ◽  
Henry E. Duckworth
Keyword(s):  
Thin Films ◽  
Aluminum Oxide ◽  
Energy Loss ◽  
Energy Range ◽  
Energy Dependence ◽  
Cross Section ◽  
Cross Sections ◽  
Condensed Matter ◽  
Forward Direction ◽  
Electronic Component

Measurements are reported of the energy loss suffered by H1 and He4 particles, of 4- to 30-kev energy, in passing through thin films of carbon, aluminum oxide, and VYNS. Only those particles that emerged in the forward direction were studied. Evidence is presented for identifying the stopping cross sections per atom observed in this way with Se, the electronic component of the total stopping cross section per atom. It appears that the calculated energy dependence of [Formula: see text] is somewhat in error, and that the magnitudes of the Se's for He4 are systematically too small by 10–15%.

Measurement of the neutron total cross section and resonance parameters of249Cf in the energy range 0.02?66 eV

1983 ◽  
Vol 55 (5) ◽  
pp. 729-732 ◽  
Author(s):  
V. A. Anufriev ◽  
A. B. Alekseev ◽  
S. I. Babich ◽  
Yu. V. Efremov ◽  
E. A. Erin ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Resonance Parameters ◽  
Neutron Total Cross Section

ELECTRONIC PROPERTIES OF A HYDROGENIC IMPURITY IN A QUANTUM WIRE WITH V-SHAPED CROSS-SECTION: SPIN-ORBIT COUPLING, RELATIVISTIC CORRECTION AND CONDUCTANCE

2013 ◽  
Vol 24 (07) ◽  
pp. 1350041 ◽  
Author(s):  
R. KHORDAD ◽  
H. BAHRAMIYAN
Keyword(s):  
Cross Section ◽  
Quantum Wire ◽  
Energy Levels ◽  
Relativistic Correction ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Hydrogenic Impurity ◽  
Mass Approximation ◽  
Shaped Cross Section

The effects of spin-orbit coupling (SOC) and relativistic correction (RC) on the energy levels of a hydrogenic impurity in a GaAs/Ga 1-x Al x As quantum wire are studied. The quantum wire has a V-shaped cross-section and the impurity located in its center. Our numerical calculations have done using a variational procedure within the effective mass approximation. Our results show that (i) the splitting due to the SOC decreases with increasing the wire width, (ii) the SOC and RC increase when the concentration increases, (iii) the SOC is zero for l = 0 (l is angular momentum) and nonzero for l ≠ 0, (iv) for a given wire width, the RC is different for l = 0 and l = 1 due to expectation values of [Formula: see text] and [Formula: see text] (r is distance between the electron and impurity). We also computed the conductance of the quantum wire with and without impurity.

The total cross-section of natural uranium for fast neutrons in the energy range (0·8–9·0 MeV)

1974 ◽  
Vol 1 (5) ◽  
pp. 305-309
Author(s):  
D.B.C.B. Syme ◽  
J.D. Kellie ◽  
J. McKeown ◽  
S.J. Hall ◽  
G.I. Crawford
Keyword(s):  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Natural Uranium ◽  
Fast Neutrons
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