scholarly journals The Forward-Plane Star in $$^1$$H(d, pp)n Breakup at E$$_{{{\varvec{d}}}}=\mathbf{80}$$ MeV/nucleon

2021 ◽  
Vol 62 (4) ◽  
Author(s):  
A. Wilczek ◽  
A. Szadziński ◽  
N. Kalantar-Nayestanaki ◽  
St. Kistryn ◽  
A. Kozela ◽  
...  
Keyword(s):  
Cross Section ◽  
Beam Energy ◽  
Detector System ◽  
Systematic Analysis ◽  
Star Configurations

AbstractAnalysis of the data acquired with the BINA detector system in $$^1$$ 1 H(d, pp)n reaction at the beam energy of 80 MeV/nucleon makes a systematic analysis of the star configurations possible. This paper shows the preliminary cross section of the Forward-Plane Star (FPS) configuration with the neighbouring configurations.

scholarly journals Studies of Deuteron–Proton Collisions at 100 MeV

2021 ◽  
Vol 62 (4) ◽  
Author(s):  
I. Skwira-Chalot ◽  
N. Kalantar-Nayestanaki ◽  
St. Kistryn ◽  
A. Kozela ◽  
E. Stephan
Keyword(s):  
Cross Section ◽  
Effective Field Theory ◽  
Beam Energy ◽  
Effective Field ◽  
Breakup Reaction ◽  
Low Energy ◽  
Chiral Effective Field Theory ◽  
Proton Collisions ◽  
Realistic Potentials ◽  
Good Agreement

AbstractDifferential cross section for the $$^1H(d,pp)n$$ 1 H ( d , p p ) n reaction is sensitive to various dynamical ingredients and allows for thorough tests of theoretical potentials describing the interaction in the three nucleon systems. The analysis of the experimental data collected for the breakup reaction at the beam energy of 100 MeV has been performed and the first cross section results for selected configurations are presented in this paper. They are in good agreement with calculations based on the realistic potentials. Studies at this relatively low energy will also be important for examining awaited calculations within the Chiral Effective Field Theory.

scholarly journals Activation cross section of the (n,2n) reaction on Hf isotopes

2019 ◽  
Vol 23 ◽  
pp. 47
Author(s):  
A. Kalamara ◽  
M. Serris ◽  
A. Spiliotis ◽  
D. Sigalos ◽  
N. Patronis ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross Section ◽  
Beam Energy ◽  
Reaction Cross ◽  
Activation Technique ◽  
Incident Neutron ◽  
Activation Cross Section ◽  
Reference Reaction

Cross sections of the 174Hf(n,2n)173Hf and 176Hf(n,2n)175Hf reactions have been experimentally determined relative to the 27Al(n,α)24Na reference reaction at incident neutron energies of 15.3 and 17.1 MeV by means of the activation technique. The irradiations were carried out at the 5 MV tandem T11/25 Accelerator Laboratory of NCSR "Demokritos" with monoenergetic neutron beams provided via the 3H(d,n)4He reaction, using a new Ti-tritiated target of 373 GBq activity. In the determination of the 176Hf(n,2n)175Hf reaction cross section the contamination of the 174Hf(n,γ)175Hf and 177Hf(n,3n)175Hf reactions has been taken into account. Moreover, the neutron beam energy has been studied by means of Monte Carlo simulation codes and the neutron flux has been determined via the 27Al(n,α)24Na reference reaction.

MEASUREMENT OF OFF-PLANE STAR ANOMALY IN pd BREAKUP AT Ep = 9.5 MeV AND Ep = 13 MeV

2009 ◽  
Vol 24 (11n13) ◽  
pp. 863-866
Author(s):  
T. SUETA ◽  
S. KUROITA ◽  
H. SHIMODA ◽  
Y. EGUCHI ◽  
K. YASHIMA ◽  
...  
Keyword(s):  
Cross Section ◽  
Inclination Angle ◽  
Coulomb Force ◽  
Experimental Results ◽  
Beam Axis ◽  
Space Star ◽  
Star Configurations

We measured D (p, pp)n cross section at Ep = 9.5 MeV and 13 MeV at off-plane star configurations, including the space star where the star is perpendicular to the beam axis. The experimental results were compared with recent pd breakup calculations using screened Coulomb force, and disagreement was found to smoothly vary with an inclination angle of the off-plane star, α. Further systematic experiments are necessary to investigate the star anomaly.

A BaF2 detector system for (n,γ) cross section measurements at ORELA

1997 ◽  
Vol 621 (1-2) ◽  
pp. 254-257 ◽  
Author(s):  
K.H. Guber ◽  
R.R. Spencer ◽  
P.E. Koehler ◽  
R.R. Winters
Keyword(s):  
Cross Section ◽  
Detector System

scholarly journals MANIFESTATION OF AN EXCITED ELECTRON IN e⁺e¯ → γγ REACTION

2021 ◽  
pp. 14-18
Author(s):  
G.I. Gakh ◽  
M.I. Konchatnij ◽  
N.P. Merenkov ◽  
A.G. Gakh
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Beam Energy ◽  
Correlation Coefficients ◽  
Spin Correlation ◽  
Excited Electron ◽  
Electron Mass ◽  
Electron Contribution ◽  
Numerical Estimations

The differential cross section and some polarization observables have been calculated for the e⁺e¯ → γγ reaction taking into account the contribution of the excited electron. The spin correlation coefficients were calculated for the case when both beams are polarized. We consider two approaches for the excited electron contribution: the eу → γγ contact interaction and the exchange of the excited electron in t- and u-channels. Numerical estimations are given for the excited electron contribution to the differential cross section and spin correlation coefficients for vari-ous values of the electron beam energy and excited electron mass.

scholarly journals Neutron pick-up reactions in 18O (10 MeV/nucleon) + Ta

2020 ◽  
Vol 4 (4) ◽  
pp. 274-280
Author(s):  
S. Lukyanov ◽  
T. Issatayev ◽  
B.M. Hue ◽  
V. Maslov ◽  
K. Mendibayev ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Statistical Models ◽  
Beam Energy ◽  
Nuclear Reactions ◽  
Production Cross ◽  
Ion Beams ◽  
O Isotopes ◽  
Momentum Distributions ◽  
Inelastic Processes

The availability of new radioactive ion beams has broadened the study of nuclear reactions and nuclear structure. The main mechanism to produce the secondary beams is the fragmentation of the projectile. An alternative method for the production of the exotic nuclei is the multinucleon transfer. We measured production cross section for the B, C, N and O isotopes in the reaction 18O + Ta and the beam energy at 10 MeV/nucleon. The cross-sections were obtained by integrating the momentum distributions of the isotopes. It was shown that in deep inelastic processes the production yields of different isotopes could be well described using statistical models and could also be explained by the Qgg-systematic.

Cross section of the 3H(d, 3He)nn reaction at a deuteron beam energy of 37 MeV

2010 ◽  
Vol 74 (4) ◽  
pp. 453-457
Author(s):  
O. O. Belyuskina ◽  
V. I. Grantsev ◽  
V. M. Lebedev ◽  
A. L. Litvinsky ◽  
K. K. Kisurin ◽  
...  
Keyword(s):  
Cross Section ◽  
Beam Energy ◽  
Deuteron Beam

scholarly journals Generation, transport, and efficient extraction of a large cross-section electron beam into an air in an accelerator with a mesh plasma cathode

2018 ◽  
Vol 36 (1) ◽  
pp. 22-28 ◽  
Author(s):  
Maxim S. Vorobyov ◽  
Tamara V. Koval ◽  
Nikolay N. Koval ◽  
Nguyen Bao Hung
Keyword(s):  
Electron Beam ◽  
Cross Section ◽  
Beam Energy ◽  
Arc Discharge ◽  
Theoretical Research ◽  
Metal Foil ◽  
Large Cross Section ◽  
Plasma Parameters ◽  
Plasma Cathode ◽  
Discharge System

AbstractThe paper presents experimental and theoretical research data on the generation, transport, and extraction of a large cross-section (750 × 150 mm2) electron beam into the air through a thin metal foil in an accelerator with a mesh plasma cathode on the bases of a low-pressure arc and with a multi-aperture two-electrode electron-optical system. When the burning conditions of the arc discharge, responsible for the generation of the emission plasma, is changed, the characteristics of this plasma were investigated, including under the conditions of the selection of electrons from it. Our experiments show that at an accelerating voltage of 200 kV, current in the accelerating gap of up to 30 A, and full width at half maximum of up to 100 µm, the average extracted power is ≈4 kW and the extracted beam current is ≈85% from the common current into the accelerating gap. Our numerical estimates give a good correlation between the arc and emission plasma parameters depending on the electrode configuration in the discharge system and on the mechanism of electron beam generation. Analysis of the emission plasma parameters under different arc conditions and of the mechanisms responsible for the beam energy loss suggests that most of the energy in the accelerator is lost at the support grid and at the output foil due to defocusing of the beam and partial electron reflection from the foil. Other mechanisms that decrease the extracted beam energy are discussed.

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