Study of the cross-section of a direct nuclear reaction in the vicinity of its singularities

In this note we consider the cross section for a nuclear reaction in which one of the product nuclei is unstable, with two or more levels contributing to its decay. Previously a formula had been derived from R-matrix theory for the case where contributions come from only a single level of the nucleus with a given spin and parity.

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Methods to subtract the effect of the decay of different nuclear reaction products on the cross-section measurements and their application to the reactions studied

Physical Review C ◽

10.1103/physrevc.103.014611 ◽

2021 ◽

Vol 103 (1) ◽

Author(s):

Yueli Song ◽

Fengqun Zhou ◽

Yong Li ◽

Xiaopeng Zhang ◽

Mingli Tian ◽

...

Keyword(s):

Nuclear Reaction ◽

Cross Section ◽

Reaction Products ◽

The Cross

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Differential Cross Sections of 9Be(d,p0)10Be, 9Be(d,p1)10Be, 9Be(d,α0)7Li and 9Be(d,α1)7Li reactions

HNPS Proceedings ◽

10.12681/hnps.1811 ◽

2019 ◽

Vol 26 ◽

pp. 151

Author(s):

P. Tsavalas ◽

A. Lagoyannis ◽

K. Mergia ◽

E. Ntemou ◽

C. P. Lungu

Keyword(s):

Elastic Scattering ◽

Energy Range ◽

Nuclear Reaction ◽

Cross Section ◽

Cross Sections ◽

Differential Cross ◽

Areal Density ◽

Deuteron Energy ◽

Nuclear Reaction Analysis ◽

The Cross

In the present work, the cross sections of the 9Be(d,p0)10Be, 9Be(d,p1)10Be,9Be(d,α0)7Li and 9Be(d,α1)7Li in the deuteron energy range Elab= 1 – 2.2 MeV with an energy step of 20 keV and at detection angles between 120o and 170o were measured, suitable for nuclear reaction analysis. A Si3N4film coated with a thin Be layer was used and the cross sections are determined relatively to the cross section of the natSi(d,d)natSi elastic scattering. Additionally, proton and oxygen beam measurements were carried out in order to determine the atomic areal density which is required to determine the cross sections.

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A theoretical model for the cross section of the proton-boron fusion nuclear reaction

Radiation Physics and Chemistry ◽

10.1016/j.radphyschem.2019.03.028 ◽

2020 ◽

Vol 167 ◽

pp. 108224 ◽

Cited By ~ 1

Author(s):

Federico Alejandro Geser ◽

Mauro Valente

Keyword(s):

Theoretical Model ◽

Nuclear Reaction ◽

Cross Section ◽

The Cross

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An investigation of the effects of level density models and alpha optical model potentials on the cross-section calculations for the production of the radionuclides 62Cu, 67Ga, 86Y and 89Zr via some alpha induced reactions

Radiochimica Acta ◽

10.1515/ract-2019-3169 ◽

2020 ◽

Vol 108 (6) ◽

pp. 459-467

Author(s):

Mert Şekerci

Keyword(s):

Nuclear Reaction ◽

Cross Section ◽

Optical Model ◽

Level Density ◽

Model Potentials ◽

Consistent Model ◽

Level Density Models ◽

Chi Squared ◽

The Cross ◽

Reaction Processes

AbstractTheoretical studies via nuclear reaction models have an undeniable importance and impact in terms of better understanding of reaction processes and their nature. In this study, by considering the importance of these models and the medical radionuclides, the effects of six level density models and eight alpha optical model potentials on the cross-section calculations for the production of the radionuclides 62Cu, 67Ga, 86Y and 89Zr via 59Co(α,n)62Cu, 60Ni(α,np)62Cu, 65Cu(α,2n)67Ga, 64Zn(α,p)67Ga, 85Rb(α,3n)86Y, 86Sr(α,n)89Zr, 87Sr(α,2n)89Zr and 88Sr(α,3n)89Zr reactions were investigated. Calculations for each reaction route were performed by using the TALYS v1.9 code. The most consistent model with the literature data taken from the Experimental Nuclear Reaction Database (EXFOR), was identified by using the reduced chi-squared statistics in addition to an eyeball estimation. Also, the effects of combinational use of selected models and potentials were investigated by comparing the calculational results with the experimental data.

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A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100073933 ◽

1973 ◽

Vol 31 ◽

pp. 698-699

Author(s):

V. Mizuhira ◽

Y. Futaesaku

Keyword(s):

Cross Section ◽

Tannic Acid ◽

Elastic Fiber ◽

The Other ◽

New Approach ◽

Tissue Block ◽

Active Reaction ◽

The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

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Energy Distribution in Electron Beams

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100096096 ◽

1972 ◽

Vol 30 ◽

pp. 568-569

Author(s):

Tamotsu Ohno

Keyword(s):

Electron Beam ◽

Energy Distribution ◽

Cross Section ◽

Integral Curve ◽

Electron Beams ◽

Electron Gun ◽

Angular Divergence ◽

Apparent Increase ◽

Integral Width ◽

The Cross

The energy distribution in an electron; beam from an electron gun provided with a biased Wehnelt cylinder was measured by a retarding potential analyser. All the measurements were carried out with a beam of small angular divergence (<3xl0-4 rad) to eliminate the apparent increase of energy width as pointed out by Ichinokawa.The cross section of the beam from a gun with a tungsten hairpin cathode varies as shown in Fig.1a with the bias voltage Vg. The central part of the beam was analysed. An example of the integral curve as well as the energy spectrum is shown in Fig.2. The integral width of the spectrum ΔEi varies with Vg as shown in Fig.1b The width ΔEi is smaller than the Maxwellian width near the cut-off. As |Vg| is decreased, ΔEi increases beyond the Maxwellian width, reaches a maximum and then decreases. Note that the cross section of the beam enlarges with decreasing |Vg|.

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