Particle–Nucleus Scattering at Intermediate Energies

1972 ◽  
Vol 50 (14) ◽  
pp. 1609-1613 ◽  
Author(s):  
Melvyn E. Best
Keyword(s):  
Cross Sections ◽  
Incident Neutron ◽  
Total Neutron ◽  
Intermediate Energies ◽  
Incident Pion ◽  
Glauber Theory ◽  
Nucleus Scattering ◽  
Theory And Experiment ◽  
Good Agreement

For incident neutron energies between 20 MeV and 10 GeV the total neutron–nucleus [Formula: see text] cross sections were calculated using Glauber theory. Remarkably good agreement between experiment and theory was found at energies above 250 MeV. Using the same formalism with identical nuclear parameters, the π−–C cross sections were calculated for incident pion energies near the (3, 3) resonance. In this case, however, good agreement between theory and experiment was found for pion energies above 150 MeV.

scholarly journals Coherent and incoherent channels of neutrino-nucleus reactions

2020 ◽  
Vol 16 ◽  
pp. 75
Author(s):  
P. C. Divari ◽  
T. S. Kosmas
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Charged Current ◽  
Preliminary Results ◽  
Scattering Cross ◽  
Neutrino Detection ◽  
Intermediate Energies ◽  
Nucleus Scattering ◽  
Scattering Cross Sections

Inelastic neutrino-nucleus scattering cross sections at low and intermediate energies are investigated for currently interesting nuclei employed in neutrino-detection experiments. This is an extension to charged current processes of our previous QRPA calculations referred to neutral current neutrino/antineutrino-nucleus reactions. Our preliminary results for the reactions 56Fe(νe, e−)56Co and 40Ar(νe, e−)40K compare rather well with similar calculations obtained in the context of continuum RPA.

First (n, p) measurements with the Indiana University Cyclotron Facility

1987 ◽  
Vol 65 (6) ◽  
pp. 687-690 ◽  
Author(s):  
D. Počanić ◽  
K. Wang ◽  
C. J. Martoff ◽  
S. S. Hanna ◽  
R. C. Byrd ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Beam ◽  
Cross Sections ◽  
Distorted Wave ◽  
Indiana University ◽  
Preliminary Results ◽  
Intermediate Energies ◽  
Set Up ◽  
Wave Calculation ◽  
Good Agreement

A new monochromatic neutron-beam facility has been set up at the Indiana University Cyclotron Facility, primarily for (n, p) reaction measurements at intermediate energies (100–200 MeV). Reported are the experimental layout of the facility and preliminary results of the first measurements: 6Li(n,p)6He cross sections at six angles ranging from Θcm = 0–22°, with En = 118 MeV (laboratory). Good agreement is found between the measured σ(0°) and the cross sections measured for the mirror reaction 6Li(p, n) at 120 and 144 MeV. Results of a distorted wave calculation, while slightly lower, are consistent with the preliminary experimental 0° cross section.

scholarly journals TESTING 6,8He DENSITY DISTRIBUTIONS BY CALCULATIONS OF TOTAL REACTION CROSS-SECTIONS OF 6,8He+28Si

2004 ◽  
Vol 13 (03) ◽  
pp. 573-583 ◽  
Author(s):  
V. K. LUKYANOV ◽  
E. V. ZEMLYANAYA ◽  
S. E. MASSEN ◽  
Ch. C. MOUSTAKIDIS ◽  
A. N. ANTONOV ◽  
...  
Keyword(s):  
Cross Sections ◽  
Reaction Cross ◽  
Scattering Data ◽  
Total Reaction ◽  
Density Distributions ◽  
Intermediate Energies ◽  
Limit Model ◽  
Optical Limit ◽  
Nucleus Scattering ◽  
Reaction Cross Sections

Calculations of the 6,8 He +28 Si total reaction cross-sections at intermediate energies are performed on the basis of the Glauber–Sitenko microscopic optical-limit model. The target-nucleus density distribution is taken from the electron-nucleus scattering data, and the 6,8 He densities are used as they are derived in different models. The results of the calculations are compared with existing experimental data. The effects of the density tails of the projectile nuclei as well as the role of shell admixtures and short-range correlations are analyzed.

Polarization dependence of resonant multiphoton ionization in atomic mercury

1984 ◽  
Vol 62 (5) ◽  
pp. 419-430
Author(s):  
F. W. Dalby ◽  
M. H. L. Pryce ◽  
J. H. Sanders
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Multiphoton Ionization ◽  
Polarization Dependence ◽  
Ionization Cross ◽  
Polarization Dependences ◽  
Ionization Cross Sections ◽  
Theory And Experiment ◽  
Atomic Mercury ◽  
Good Agreement

The polarization dependences of a number of resonant multiphoton ionizations in atomic Hg have been studied experimentally and theoretically. Good agreement between theory and experiment is found from which quantitive information about relative ionization cross sections from excited states has been deduced.

scholarly journals On the Electron Impact Integral Cross-Sections for Butanol and Pentanol Isomers

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 43
Author(s):  
Nafees Uddin ◽  
Paresh Modak ◽  
Bobby Antony
Keyword(s):  
Momentum Transfer ◽  
Cross Sections ◽  
Optical Potential ◽  
Total Cross Sections ◽  
Intermediate Energies ◽  
Spherical Complex ◽  
Potential Formalism ◽  
The Impact ◽  
First Time ◽  
Good Agreement

The need for a reliable and comprehensive database of cross-sections for many atomic and molecular species is immense due to its key role in R&D domains such as plasma modelling, bio-chemical processes, medicine and many other natural and technological environments. Elastic, momentum transfer and total cross-sections of butanol and pentanol isomers by the impact of 6–5000 eV electrons are presented in this work. The calculations were performed by employing the spherical complex optical potential formalism along with single-centre expansion and group additivity rule. The investigations into the presence of isomeric variations reveal that they are more pronounced at low and intermediate energies. Elastic, total cross-sections (with the exception of n-pentanol) and momentum transfer cross-sections for all pentanol isomers are reported here for the first time, to the best of our knowledge. Our momentum transfer cross-sections for butanol isomers are in very good agreement with the experimental and theoretical values available, and in reasonable consensus for other cross-sections.

The photoelectron spectrum of N 2 , and partial cross sections as a function of photon energy from 16 to 40 eV

1977 ◽  
Vol 358 (1692) ◽  
pp. 87-103 ◽  
Keyword(s):  
Cross Sections ◽  
Photoelectron Spectrum ◽  
Molecular Nitrogen ◽  
Resonant Scattering ◽  
Vibrational States ◽  
Electron Synchrotron ◽  
Cylindrical Mirror ◽  
Theoretical Predictions ◽  
Theory And Experiment ◽  
Good Agreement

The Daresbury electron synchrotron has been used to provide photons from 16 to 40 eV for an investigation of the photoelectron spectrum of molecular nitrogen. A cylindrical mirror analyser was designed so as to obtain partial cross sections which are not dependent upon the asymmetry parameter β of the ejected photoelectrons. Partial cross sections are reported for individual vibrational states of the N 2 over the region covered by the Hopfield bands and their associated photoionization continua to 20.5 eV. Allowance has been made in the data for the resonant scattering of electrons from residual N 2 through the formation of the short-lived state of Ng and for the photo dissociation of . Partial cross sections for the electronic states of the ion are reported which allow recent theoretical predictions to be studied. Reasonable agreement is found between theory and experiment above 30 eV for the X 2 ∑ g + state of N 2 + . There is also good agreement between theory and experiment for the B 2 ∑ u + state except near threshold. The data for the A 2 II u state show a steady departure from theory towards the higher photon energies.

Total neutron-nucleus cross sections at intermediate energies

1988 ◽  
Vol 490 (3) ◽  
pp. 667-688 ◽  
Author(s):  
J. Franz ◽  
H.P. Grotz ◽  
L. Lehmann ◽  
E. Rössle ◽  
H. Schmitt ◽  
...  
Keyword(s):  
Cross Sections ◽  
Total Neutron ◽  
Intermediate Energies

Analysis of Reinforced Concrete Culvert considering Concrete Creep and Shrinkage

1996 ◽  
Vol 1541 (1) ◽  
pp. 120-126
Author(s):  
Charles J. Oswald
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Cross Sections ◽  
Soil Structure ◽  
Silty Clay ◽  
Soil Pressure ◽  
Concrete Creep ◽  
Long Span ◽  
Creep And Shrinkage ◽  
Good Agreement

Measurements made on a long span reinforced concrete arch culvert under 7.3 m (24 ft) of silty clay backfill were compared with results from finite-element analyses of the soil-structure system using the CANDE finite-element code. The culvert strains and deflections and the soil pressure on the culvert were measured during construction and during the following 2.5 years at three instrumented cross sections. The CANDE program was modified to account for the effects of concrete creep and shrinkage strains after it was noted that the measured postconstruction culvert deflection and strains increased significantly whereas the measured soil pressure on the culvert remained relatively constant. Good agreement was generally obtained between measured and calculated values of the culvert strain and deflection and the soil pressure during the entire monitoring period after the code was modified.

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