Nuclear Masses and the r- and p-Processes of Nucleosynthesis

2001 ◽  
pp. 105-114
Author(s):  
S. Goriely
Keyword(s):  
Nuclear Masses

scholarly journals Nuclear mass measurements with radioactive ion beams

2019 ◽  
Vol 28 (04) ◽  
pp. 1930005 ◽  
Author(s):  
Michael A. Famiano
Keyword(s):  
Mass Measurement ◽  
Measurement Techniques ◽  
Nuclear Mass ◽  
Mass Measurements ◽  
Future Directions ◽  
Advantages And Disadvantages ◽  
Nuclear Masses ◽  
Under Construction ◽  
Very High ◽  
Practical Constraints

Nuclear masses are the most fundamental of all nuclear properties, yet they can provide a wealth of knowledge, including information on astrophysical sites, constraints on existing theory, and fundamental symmetries. In nearly all applications, it is necessary to measure nuclear masses with very high precision. As mass measurements push to more short-lived and more massive nuclei, the practical constraints on mass measurement techniques become more exacting. Various techniques used to measure nuclear masses, including their advantages and disadvantages are described. Descriptions of some of the world facilities at which the nuclear mass measurements are performed are given, and brief summaries of planned facilities are presented. Future directions are mentioned, and conclusions are presented which provide a possible outlook and emphasis on upcoming plans for nuclear mass measurements at existing facilities, those under construction, and those being planned.

scholarly journals Nuclear masses, deformations and shell effects

2011 ◽  
Vol 322 ◽  
pp. 012017 ◽  
Author(s):  
Jorge G Hirsch ◽  
César A Barbero ◽  
Alejandro E Mariano
Keyword(s):  
Shell Effects ◽  
Nuclear Masses

scholarly journals Nuclear masses and the origin of the elements

2006 ◽  
Vol 37 (5) ◽  
pp. 16-21 ◽  
Author(s):  
Hendrik Schatz ◽  
Klaus Blaum
Keyword(s):  
Nuclear Masses

scholarly journals Non-laminar cerebral cortex in teleost fishes?

2008 ◽  
Vol 5 (1) ◽  
pp. 117-121 ◽  
Author(s):  
Hironobu Ito ◽  
Naoyuki Yamamoto
Keyword(s):  
Cerebral Cortex ◽  
Neural Circuits ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Teleost Fishes ◽  
Nuclear Masses ◽  
Cerebral Neocortex ◽  
Three Dimensional Space

A large skull is disadvantageous to animals that move quickly in three-dimensional space, such as fishes and birds in water or air. A cerebral neocortex with a six-layered sheet has not evolved, most likely due to the limited cranial space. Instead of the laminar cortex, telencephalic nuclear masses seem to have evolved as the pallium in teleost fishes. We consider that the nuclear masses contain rather simple neural circuits sharing a skeleton of simple circuits in the mammalian cortex, which have been elaborated by additional circuits in mammals. Such basic similarities at the connectional level shared by nuclear and cortical pallium might underlie similar or equivalent functions.

scholarly journals Nuclear masses, chaos, and the residual interaction

2006 ◽  
Vol 637 (1-2) ◽  
pp. 48-52 ◽  
Author(s):  
A. Molinari ◽  
H.A. Weidenmüller
Keyword(s):  
Residual Interaction ◽  
Nuclear Masses

Energy Density Formalism, Nuclear Masses and Heavy-Ion Interaction

1986 ◽  
pp. 291-300 ◽  
Author(s):  
Irwin Reichstein ◽  
F. Bary Malik
Keyword(s):  
Energy Density ◽  
Heavy Ion ◽  
Nuclear Masses

Mapping of Nuclear Masses in the Region (N ≤ 126, Z ≥ 82) from Direct Measurements of Francium Isotopes

1980 ◽  
pp. 281-289
Author(s):  
G. Audi ◽  
M. Epherre ◽  
C. Thibault ◽  
R. Klapisch ◽  
G. Huber ◽  
...  
Keyword(s):  
Direct Measurements ◽  
Nuclear Masses

scholarly journals Exploring the astrophysical conditions for the creation of the first r-process peak, and the impact of nuclear physics uncertainties

2020 ◽  
Vol 27 ◽  
pp. 175
Author(s):  
Stylianos Nikas ◽  
G. Martínez-Pinedo ◽  
M. R. Wu ◽  
A. Sieverding ◽  
M. P. Reiter
Keyword(s):  
Beta Decay ◽  
Nuclear Physics ◽  
Decay Rates ◽  
Abundance Pattern ◽  
Nuclear Masses ◽  
The Creation ◽  
R Process ◽  
The Impact

We present a study of nucleosynthesis for conditions of high Ye outflows from NeutronStar Mergers (NSMs). We investigate the effect of new beta-decay rates measurements and uncertaintiesin nuclear masses of the newly measured 84,85 Ga to the r-process nucleosynthesis calculations. The impactof these quantities to the production of the elements of the r-process abundance pattern for A < 100 isquantified and presented.

scholarly journals Nuclear Structure Evolution Reflected from Local Relations

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2253
Author(s):  
Man Bao ◽  
Qian Wei
Keyword(s):  
Nuclear Charge ◽  
Binding Energies ◽  
Structure Evolution ◽  
Α Decay ◽  
Charge Radii ◽  
Coexistence Phase ◽  
Nuclear Masses ◽  
Quadrupole Deformation Parameter ◽  
Nuclear Structures ◽  
Physical Quantities

The structure evolution of nuclei which are in connection with symmetry breaking is one of the important problems not only for nuclear structures, but also for astrophysics and the spectroscopy of exotic nuclei. Many physical quantities can provide useful information of a shell structure, such as nuclear masses and nuclear charge radii. This paper introduces three kinds of local relations, i.e., the NpNn scheme respectively for the quadrupole deformation parameter and the excitation energy of the first 2+, 4+, 6+ states, the (αN′n+N′p) relation for nuclear charge radii and α decay energies, and the so-called “nonpairing” relation for binding energies and nuclear charge radii. All these relations reflect the evolution of nuclear structures, involving shells, subshells, shape coexistence, phase transition and the Wigner effect. Some results from different models can be verified with each other.

scholarly journals Modification of the nuclear landscape in the inverse problem framework using the generalized Bethe–Weizsäcker mass formula

2018 ◽  
Vol 27 (02) ◽  
pp. 1850015 ◽  
Author(s):  
S. Cht. Mavrodiev ◽  
M. A. Deliyergiyev
Keyword(s):  
Inverse Problem ◽  
Mass Formula ◽  
Maximum Deviation ◽  
Model Parameters ◽  
Magic Numbers ◽  
Systems Of Equations ◽  
Nonlinear Systems Of Equations ◽  
Nuclear Mass ◽  
Nuclear Masses ◽  
Semi Empirical

We formalized the nuclear mass problem in the inverse problem framework. This approach allows us to infer the underlying model parameters from experimental observation, rather than to predict the observations from the model parameters. The inverse problem was formulated for the numerically generalized semi-empirical mass formula of Bethe and von Weizsäcker. It was solved in a step-by-step way based on the AME2012 nuclear database. The established parametrization describes the measured nuclear masses of 2564 isotopes with a maximum deviation less than 2.6[Formula: see text]MeV, starting from the number of protons and number of neutrons equal to 1.The explicit form of unknown functions in the generalized mass formula was discovered in a step-by-step way using the modified least [Formula: see text] procedure, that realized in the algorithms which were developed by Lubomir Aleksandrov to solve the nonlinear systems of equations via the Gauss–Newton method, lets us to choose the better one between two functions with same [Formula: see text]. In the obtained generalized model, the corrections to the binding energy depend on nine proton (2, 8, 14, 20, 28, 50, 82, 108, 124) and ten neutron (2, 8, 14, 20, 28, 50, 82, 124, 152, 202) magic numbers as well on the asymptotic boundaries of their influence. The obtained results were compared with the predictions of other models.

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