scholarly journals WHAT MAGNETIC MOMENTS TELL US ABOUT NUCLEAR FORCES AND NUCLEAR STRUCTURE.

1972 ◽  
Author(s):  
G Brown
Keyword(s):  
Nuclear Structure ◽  
Magnetic Moments ◽  
Nuclear Forces

Nuclear structure and nuclear forces

1952 ◽  
Vol 133 (1-2) ◽  
pp. 276-285
Author(s):  
Victor F. Weisskopf
Keyword(s):  
Nuclear Structure ◽  
Nuclear Forces

scholarly journals On the nuclear forces and the magnetic moments of the neutron and the proton

1938 ◽  
Vol 166 (924) ◽  
pp. 154-177 ◽  
Keyword(s):  
Cosmic Radiation ◽  
Decay Constant ◽  
Magnetic Moments ◽  
Cosmic Ray ◽  
Exchange Theory ◽  
Approximate Theory ◽  
Nuclear Forces ◽  
Hard Component ◽  
Heavy Particles ◽  
Upper Limit

It was first suggested by Heisenberg that the forces between a proton and a neutron are connected with an exchange of charge between the two heavy particles. This exchange nature of the neutron-proton forces is now generally accepted. It would follow from this assumption that in suitable circumstances a proton (neutron) could emit a positively (negatively) charged particle transforming itself into a neutron (proton). At first sight it seemed that the emission of positive or negative electrons in the β -decay could in this way be made responsible for the nuclear forces. This was, in fact, suggested by Iwanenko (1934) and Tamm (1934). It has also been pointed out by Wick (1935) that the virtual emission of β -electrons might explain the values of the magnetic moments of the proton and the neutron. These theories, however, were not successful. The nuclear forces, for instance, turn out to be too small by a factor of more than 10 10 and have far too small a range; this is due to the fact that the β -decay constant is extremely small. Since the β -decay is a process which, in nuclear dimensions, takes “geological ages”, one might think that the ordinary properties of the heavy particles have no direct connexion with this process and that an approximate theory of the nuclear forces should be possible without the inclusion of the β -decay. A new hope for such an “exchange theory” of the properties of nuclei is offered by the probable existence of a hitherto unknown type of particle constituting the hard component of cosmic radiation. Since these particles do not lose much energy by radiation, it has been suggested by Neddermeyer and Anderson (1937) that they are (positive and negative) “heavy electrons” with a mass between that of an electron and a proton. From cosmic-ray data the mass of these particles can hardly be determined yet, but it can be limited to values between 3 and 300 electron masses. There are, however, some arguments favouring a mass nearer to the upper limit of 100-200 electron masses.

Theoretical studies in nuclear structure I. Enumeration and classification of the states arising from the filling of the nuclear d -shell

1950 ◽  
Vol 201 (1067) ◽  
pp. 516-544 ◽  
Keyword(s):  
Nuclear Structure ◽  
Short Range ◽  
Dimensional Space ◽  
Theoretical Studies ◽  
Nuclear Forces ◽  
New Classification ◽  
Simple Method

Using a simple method due to Racah, the orbital states arising from the filling of the nuclear d -shell in Russell-Saunders coupling are enumerated and, again following Racah, a new classification of the states introduced according to their transformation properties under the group of rotations in the five-dimensional space of the orbital states of a single d -particle. This new classification acquires significance from the short-range nature of nuclear forces and permits of predictions relating to the order of the levels with attractive forces of short range.

scholarly journals Skyrme-Hartree-Fock approach for description of static nuclear properties of well-deformed nuclei

2020 ◽  
Vol 16 (1) ◽  
pp. 34-37
Author(s):  
Meng-Hock Koh ◽  
Nurhafiza Mohamad Nor ◽  
Nor-Anita Rezle ◽  
Kai-Wen Kelvin Lee ◽  
Philippe Quentin ◽  
...  
Keyword(s):  
Nuclear Structure ◽  
Nuclear Physics ◽  
Nuclear Power ◽  
Magnetic Moments ◽  
Mean Field ◽  
Nucleon Nucleon ◽  
Nuclear Power Generation ◽  
Hartree Fock ◽  
Pairing Correlations ◽  
Experimental Magnetic Moment

Nuclear structure data plays an important role in nuclear physics studies and applications such as nuclear power generation. This article presents evaluations of a mean-field approach to describe two nuclear structure quantities namely the electric and magnetic moments. The Hartree-Fock-plus-pairing approach was employed with pairing correlations treated within the Bardeen-Cooper-Schrieffer (BCS) framework. The Skyrme SIII parametrization and seniority force are chosen to approximate the effective nucleon-nucleon and pairing interactions, respectively. Calculated results show that the self-consistent blocking procedure which takes into account time-reversal symmetry breaking is important to reproduce experimental magnetic moment

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