scholarly journals Measurements of cross sections and decay properties of the isotopes of elements 112, 114, and 116 produced in the fusion reactionsU233,238,Pu242, andCm248+Ca48

2004 ◽  
Vol 70 (6) ◽  
Author(s):  
Yu. Ts. Oganessian ◽  
V. K. Utyonkov ◽  
Yu. V. Lobanov ◽  
F. Sh. Abdullin ◽  
A. N. Polyakov ◽  
...  
Keyword(s):  
Cross Sections ◽  
Decay Properties

scholarly journals La137,138,139(n,γ) cross sections constrained with statistical decay properties of La138,139,140 nuclei

2017 ◽  
Vol 95 (4) ◽  
Author(s):  
B. V. Kheswa ◽  
M. Wiedeking ◽  
J. A. Brown ◽  
A. C. Larsen ◽  
S. Goriely ◽  
...  
Keyword(s):  
Cross Sections ◽  
Statistical Decay ◽  
Decay Properties

scholarly journals Our Future Nuclear Data Needs

2019 ◽  
Vol 69 (1) ◽  
pp. 109-136 ◽  
Author(s):  
Lee A. Bernstein ◽  
David A. Brown ◽  
Arjan J. Koning ◽  
Bradley T. Rearden ◽  
Catherine E. Romano ◽  
...  
Keyword(s):  
Cross Sections ◽  
Evaluation Process ◽  
Nuclear Data ◽  
Reaction Cross ◽  
Fission Reaction ◽  
Nuclear Science ◽  
Evaluation Methodologies ◽  
Decay Properties ◽  
Future Challenges ◽  
Reaction Cross Sections

A well-established knowledge of nuclear phenomena including fission, reaction cross sections, and structure/decay properties is critical for applications ranging from the design of new reactors to nonproliferation to the production of radioisotopes for the diagnosis and treatment of illness. However, the lack of a well-quantified, predictive theoretical capability means that most nuclear observables must be measured directly and used to calibrate empirical models, which in turn provide the data needed for these applications. In many cases, either there is a lack of data needed to guide the models or the results of the different measurements are discrepant, leading to the development of evaluation methodologies to provide recommended values and uncertainties. In this review, we describe the nuclear data evaluation process and the international community that carries it out. We then discuss new measurements and improved theory and/or modeling needed to address future challenges in applied nuclear science.

Spontaneous-fission decay properties and production cross-sections for the neutron-deficient nobelium isotopes formed in the 44, 48Ca + 204, 206, 208Pb reactions

2003 ◽  
Vol 16 (4) ◽  
pp. 447-456 ◽  
Author(s):  
A.V. Belozerov ◽  
M.L. Chelnokov ◽  
V.I. Chepigin ◽  
T.P. Drobina ◽  
V.A. Gorshkov ◽  
...  
Keyword(s):  
Cross Sections ◽  
Spontaneous Fission ◽  
Production Cross ◽  
Decay Properties

Decay properties and reaction dynamics of zirconium isotopes in the relativistic mean-field model

2018 ◽  
Vol 27 (02) ◽  
pp. 1850012
Author(s):  
M. Panigrahi ◽  
R. N. Panda ◽  
Bharat Kumar ◽  
S. K. Patra
Keyword(s):  
Cross Sections ◽  
Mean Field Theory ◽  
Energy Charge ◽  
Mean Field ◽  
Drip Line ◽  
Glauber Model ◽  
Mean Field Model ◽  
Relativistic Mean Field ◽  
Decay Properties ◽  
Quadrupole Deformation Parameter

In the framework of relativistic mean-field theory, the ground state properties like binding energy, charge radius and quadrupole deformation parameter for various isotopes of zirconium from the valley of stability to drip-line region have been studied. The results are compared with the experimental data and we found reasonable agreement. The calculations are carried out for [Formula: see text]-decay energy and [Formula: see text]-decay half-life up to the drip-line. Total reaction and elastic differential cross-sections are also studied for few zirconium isotopes as projectiles with [Formula: see text] as target, using different parameter sets namely NL3*, DD-ME2 and DD-PC1 in conjunction with Glauber model.

scholarly journals IDENTIFYING THE CONTRIBUTIONS OF UNIVERSAL EXTRA DIMENSIONS IN THE HIGGS SECTOR AT LINEAR e+e- COLLIDERS

2008 ◽  
Vol 23 (03n04) ◽  
pp. 519-528 ◽  
Author(s):  
ANINDYA DATTA ◽  
SANTOSH KUMAR RAI
Keyword(s):  
Cross Sections ◽  
Higgs Sector ◽  
Final States ◽  
Universal Extra Dimension ◽  
Simple Analysis ◽  
Decay Properties ◽  
The Standard Model ◽  
Simple Ratio ◽  
Kaluza Klein ◽  
Production Channel

We study the dilepton–dijet signal in the dominant Higgs production channel at a linear e+e- collider. We estimate the effects of universal extra dimension (UED) by a simple analysis of the cross-sections. The heavy Kaluza–Klein excitations of the Standard Model fields in UED can significantly alter the decay properties of the Higgs boson to loop-driven final states. We show that by taking a simple ratio between cross-sections of two different final states this difference can be very easily highlighted.

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

An Analysis of Dissociation of Molecules in a High Resolution Electron Microscope

1973 ◽  
Vol 31 ◽  
pp. 486-487
Author(s):  
Mihir Parikh
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Cross Sections ◽  
Resolving Power ◽  
Peak Intensity ◽  
Molecular Film ◽  
Resolution Electron ◽  
Dissociation Cross Section ◽  
High Resolution Electron Microscope ◽  
The Stability

It is well known that the resolution of bio-molecules in a high resolution electron microscope depends not just on the physical resolving power of the instrument, but also on the stability of these molecules under the electron beam. Experimentally, the damage to the bio-molecules is commo ly monitored by the decrease in the intensity of the diffraction pattern, or more quantitatively by the decrease in the peaks of an energy loss spectrum. In the latter case the exposure, EC, to decrease the peak intensity from IO to I’O can be related to the molecular dissociation cross-section, σD, by EC = ℓn(IO /I’O) /ℓD. Qu ntitative data on damage cross-sections are just being reported, However, the microscopist needs to know the explicit dependence of damage on: (1) the molecular properties, (2) the density and characteristics of the molecular film and that of the support film, if any, (3) the temperature of the molecular film and (4) certain characteristics of the electron microscope used

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