Muon capture, radiative pion capture and photoproduction of charged pions in double-closed-shell nuclei

1970 ◽  
Vol 4 (2) ◽  
pp. 75-79 ◽  
Author(s):  
F. Cannata
Keyword(s):  
Closed Shell ◽  
Muon Capture ◽  
Closed Shell Nuclei ◽  
Charged Pions ◽  
Pion Capture

Spin–Orbit Coupling Force Effects in Giant Excitations of Doubly Closed Shell Nuclei

1974 ◽  
Vol 52 (13) ◽  
pp. 1228-1232 ◽  
Author(s):  
F. Ledoyen
Keyword(s):  
Closed Shell ◽  
Muon Capture ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Closed Shell Nuclei ◽  
Coupling Force

We show that the spin–orbit coupling force may induce axial excitations higher in energy than the vector ones in muon capture without necessarily having [Formula: see text].

Influence of 2p-2h ground state correlations on charge distributions of doubly-closed shell nuclei

1983 ◽  
Vol 28 (4) ◽  
pp. 1791-1797 ◽  
Author(s):  
M. Waroquier ◽  
J. Bloch ◽  
G. Wenes ◽  
K. Heyde
Keyword(s):  
Ground State ◽  
Closed Shell ◽  
Charge Distributions ◽  
Closed Shell Nuclei

Helm model interpretation of 16O form factors: application to pion photoproduction and muon capture

1980 ◽  
Vol 58 (1) ◽  
pp. 48-62 ◽  
Author(s):  
R. D. Graves ◽  
B. A. Lamers ◽  
Anton Nagl ◽  
H. Überall ◽  
V. Devanathan ◽  
...  
Keyword(s):  
Form Factor ◽  
Electron Scattering ◽  
Form Factors ◽  
Muon Capture ◽  
Physical Parameters ◽  
Medium Energy ◽  
Model Interpretation ◽  
Charged Pions ◽  
Transition Densities ◽  
Energy Processes

The available experimental data for the form factors of the T = 1 levels in 16O, obtained from electron scattering at low (Darmstadt), medium (Tohoku), and high momentum transfer (Stanford), are interpreted by the generalized Helm model. This phenomenological model reduces the form factor description of each level to the listing of a few physical parameters, i.e., the radius and smearing width of the transition densities of charge (current) and magnetization, and their corresponding strength constants. Its parameters having been determined by the form factor fits, the model may then be used to predict the results of other medium energy processes; this is done here for the photoproduction of charged pions and for muon capture in16O.

scholarly journals DISTRIBUTION OF MAXIMA OF THE ANTISYMMETRIZED WAVE FUNCTION FOR THE NUCLEONS OF A CLOSED-SHELL AND FOR THE NUCLEONS OF ALL CLOSED-SHELLS IN A NUCLEUS.

2020 ◽  
Vol 15 ◽  
pp. 57
Author(s):  
G. S. Anagnostatos
Keyword(s):  
Wave Function ◽  
Mathematical Problem ◽  
Closed Shell ◽  
Wave Functions ◽  
Pictorial Representation ◽  
One Dimensional ◽  
Regular Polyhedra ◽  
Closed Shell Nuclei ◽  
Simple Systems ◽  
Closed Shells

The significant features of exchange symmetry are displayed by simple systems such as two identical, spinless fermions in a one-dimensional well with infinite walls. The conclusion is that the maxima of probability of the antisymmetrized wave function of these two fermions lie at the same positions as if a repulsive force (of unknown nature) was applied between these two fermions. This conclusion is combined with the solution of a mathematical problem dealing with the equilibrium of identical repulsive particles (of one or two kinds) on one or more spheres like neutrons and protons on nuclear shells. Such particles are at equilibrium only for specific numbers of particles and, in addition, if these particles lie on the vertices of regular polyhedra or their derivative polyhedra. Finally, this result leads to a pictorial representation of the structure of all closed shell nuclei. This representation could be used as a laboratory for determining nuclear properties and corresponding wave functions.

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