Phenomenology of Inclusive Fast-Nucleon Spectra in Weak, Electromagnetic, and Strong Nuclear Processes

1979 ◽  
Vol 42 (3) ◽  
pp. 162-165 ◽  
Author(s):  
Paul Singer ◽  
Nimai C. Mukhopadhyay ◽  
R. D. Amado
Keyword(s):  
Fast Nucleon ◽  
Nuclear Processes

Nuclear Processes Related to the Ap Stars and the Heaviest Chemical Elements

1976 ◽  
Vol 32 ◽  
pp. 169-182
Author(s):  
B. Kuchowicz
Keyword(s):  
Nuclear Physics ◽  
Nuclear Reactions ◽  
Chemical Elements ◽  
Fission Products ◽  
Abundance Pattern ◽  
Isotopic Shifts ◽  
Processed Material ◽  
R Process ◽  
Ap Stars ◽  
Nuclear Processes

SummaryIsotopic shifts in the lines of the heavy elements in Ap stars, and the characteristic abundance pattern of these elements point to the fact that we are observing mainly the products of rapid neutron capture. The peculiar A stars may be treated as the show windows for the products of a recent r-process in their neighbourhood. This process can be located either in Supernovae exploding in a binary system in which the present Ap stars were secondaries, or in Supernovae exploding in young clusters. Secondary processes, e.g. spontaneous fission or nuclear reactions with highly abundant fission products, may occur further with the r-processed material in the surface of the Ap stars. The role of these stars to the theory of nucleosynthesis and to nuclear physics is emphasized.

SPALLATION YIELDS FROM HIGH ENERGY PROTON BOMBARDMENT OF HEAVY ELEMENTS

1957 ◽  
Vol 35 (1) ◽  
pp. 21-37 ◽  
Author(s):  
J. D. Jackson
Keyword(s):  
Cross Sections ◽  
High Energy ◽  
Heavy Elements ◽  
Collective Effects ◽  
Comparison With Experiment ◽  
Energy Proton ◽  
Stringent Test ◽  
Neutron Evaporation ◽  
Nuclear Processes ◽  
Mev Protons

The Monte Carlo calculations of McManus and Sharp (unpublished) for the prompt nuclear processes occurring upon bombardment of heavy elements by 400 Mev. protons are combined with a description of the subsequent neutron evaporation to determine spallation cross sections for comparison with experiment. The model employed is a schematic one which suppresses the detailed characteristics of individual nuclei, but gives the over-all behavior to be expected. Many-particle and collective effects such as alpha particle emission and fission are ignored. The computed cross sections are presented in a variety of different graphical forms which illustrate quantitatively the qualitative picture of high energy reactions first given by Serber (1947). The calculations are in general agreement with existing data when fission is not an important effect, but the agreement does not imply a very stringent test of the various features of the model.

scholarly journals Nuclear RNA purification by flow cytometry to study nuclear processes in plants

2021 ◽  
Vol 2 (1) ◽  
pp. 100320
Author(s):  
Belén Moro ◽  
Malgorzata Kisielow ◽  
Veronica Barragan Borrero ◽  
Antoine Bouet ◽  
Christopher A. Brosnan ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Rna Purification ◽  
Nuclear Rna ◽  
Nuclear Processes

scholarly journals Vocabulary of radioanalytical methods (IUPAC Recommendations 2020)

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhifang Chai ◽  
Amares Chatt ◽  
Peter Bode ◽  
Jan Kučera ◽  
Robert Greenberg ◽  
...  
Keyword(s):  
Nuclear Reactions ◽  
Hyperfine Interactions ◽  
Chemical Species ◽  
Radiation Detectors ◽  
Nuclear Analysis ◽  
Characterization Of Materials ◽  
Nuclear Effects ◽  
Nuclear Processes ◽  
Radioanalytical Methods

AbstractThese recommendations are a vocabulary of basic radioanalytical terms which are relevant to radioanalysis, nuclear analysis and related techniques. Radioanalytical methods consider all nuclear-related techniques for the characterization of materials where ‘characterization’ refers to compositional (in terms of the identity and quantity of specified elements, nuclides, and their chemical species) and structural (in terms of location, dislocation, etc. of specified elements, nuclides, and their species) analyses, involving nuclear processes (nuclear reactions, nuclear radiations, etc.), nuclear techniques (reactors, accelerators, radiation detectors, etc.), and nuclear effects (hyperfine interactions, etc.). In the present compilation, basic radioanalytical terms are included which are relevant to radioanalysis, nuclear analysis and related techniques.

scholarly journals The Voyage of Metals in the Universe from Cosmological to Planetary Scales: the need for a Very High-Resolution, High Throughput Soft X-ray Spectrometer

2021 ◽  
Author(s):  
F. Nicastro ◽  
J. Kaastra ◽  
C. Argiroffi ◽  
E. Behar ◽  
S. Bianchi ◽  
...  
Keyword(s):  
Chemical Composition ◽  
High Resolution ◽  
Deep Understanding ◽  
High Resolution Spectroscopy ◽  
X Ray ◽  
Viable Solution ◽  
Surrounding Space ◽  
Nuclear Processes ◽  
The Universe ◽  
Very High

AbstractMetals form an essential part of the Universe at all scales. Without metals we would not exist, and the Universe would look completely different. Metals are primarily produced via nuclear processes in stars, and spread out through winds or explosions, which pollute the surrounding space. The wanderings of metals in-and-out of astronomical objects are crucial in determining their own evolution and thus that of the Universe as a whole. Detecting metals and assessing their relative and absolute abundances and energetics can thus be used to trace the evolution of these cosmic components. The scope of this paper is to highlight the most important open astrophysical problems that will be central in the next decades and for which a deep understanding of the Universe’s wandering metals, their physical and kinematical states, and their chemical composition represents the only viable solution. The majority of these studies can only be efficiently performed through High Resolution Spectroscopy in the soft X-ray band.

Gas Phase Reactions Activated by Nuclear Processes

1957 ◽  
Vol 79 (17) ◽  
pp. 4609-4616 ◽  
Author(s):  
Adon A. Gordus ◽  
John E. Willard
Keyword(s):  
Gas Phase ◽  
Gas Phase Reactions ◽  
Nuclear Processes

Cooperative laser-electron-nuclear processes: QED calculation of electron satellites spectra for multi-charged ion in laser field

2004 ◽  
Vol 99 (6) ◽  
pp. 889-893 ◽  
Author(s):  
Alexander V. Glushkov ◽  
Svetlana V. Malinovskaya ◽  
Yulia G. Chernyakova ◽  
Andrey A. Svinarenko
Keyword(s):  
Laser Field ◽  
Nuclear Processes

The natBr(p,x)73,75Se nuclear processes: a convenient route for the production of radioselenium tracers relevant to amino acid labelling

2001 ◽  
Vol 54 (6) ◽  
pp. 905-913 ◽  
Author(s):  
Michael Faßbender ◽  
Dawid de Villiers ◽  
Meiring Nortier ◽  
Nico van der Walt
Keyword(s):  
Amino Acid ◽  
Convenient Route ◽  
Nuclear Processes

An attempt to detect a neutral particle of small mass

1934 ◽  
Vol 30 (1) ◽  
pp. 59-61 ◽  
Author(s):  
J. Chadwick ◽  
D. E. Lea
Keyword(s):  
Neutral Particle ◽  
Small Mass ◽  
Conservation Of Energy ◽  
The Mean ◽  
Nuclear Processes

It has long been realised that there are difficulties in understanding the continuous β-ray spectra emitted by certain radioactive bodies, if the conservation of energy, as applied to nuclear processes, is to be retained. In the case of radium E, for example, the energy of the disintegration β particles varies from quite low values to about a million volts, the mean being nearly 400,000 volts.

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