scholarly journals Theoretical studies in nuclear reactions and nuclear structure

1992 ◽  
Author(s):  
Keyword(s):  
Nuclear Structure ◽  
Nuclear Reactions ◽  
Theoretical Studies

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.

AB INITIO NUCLEAR STRUCTURE AND NUCLEAR REACTIONS IN LIGHT NUCLEI

2005 ◽  
Vol 14 (01) ◽  
pp. 85-93 ◽  
Author(s):  
PETR NAVRÁTIL
Keyword(s):  
Ab Initio ◽  
Shell Model ◽  
Nuclear Reaction ◽  
Nuclear Structure ◽  
Nuclear Reactions ◽  
Light Nuclei ◽  
Core Shell ◽  
Ab Initio Methods ◽  
Significant Progress ◽  
Nucleon Interactions

There has been significant progress in the ab initio approaches to the structure of light nuclei. One such method is the ab initio no-core shell model (NCSM). Starting from the realistic two- and three-nucleon interactions, this method can predict the low-lying levels in p-shell nuclei. It is a challenging task to extend the ab initio methods to describe nuclear reactions. In this contribution, we present a brief overview of the NCSM with examples of recent applications as well as the first steps taken toward nuclear reaction applications.

The Nuclear Cooper Pair

2021 ◽  
Author(s):  
Grégory Potel Aguilar ◽  
Ricardo A. Broglia
Keyword(s):  
Field Theory ◽  
Nuclear Structure ◽  
Quantum Electrodynamics ◽  
Nuclear Physics ◽  
Cooper Pair ◽  
Nuclear Reactions ◽  
Pair Correlations ◽  
Nuclear Field ◽  
Experimental Findings ◽  
Reaction Processes

This monograph presents a unified theory of nuclear structure and nuclear reactions in the language of quantum electrodynamics, Feynman diagrams. It describes how two-nucleon transfer reaction processes can be used as a quantitative tool to interpret experimental findings with the help of computer codes and nuclear field theory. Making use of Cooper pair transfer processes, the theory is applied to the study of pair correlations in both stable and unstable exotic nuclei. Special attention is given to unstable, exotic halo systems, which lie at the forefront of the nuclear physics research being carried out at major laboratories around the world. This volume is distinctive in dealing in both nuclear structure and reactions and benefits from comparing the nuclear field theory with experimental observables, making it a valuable resource for incoming and experienced researchers who are working in nuclear pairing and using transfer reactions to probe them.

Theoretical studies in nuclear structure. II. Nuclear d 2 , d 3 and d 4 configurations. Fractional parentage coefficients and central force matrix elements

1951 ◽  
Vol 205 (1081) ◽  
pp. 192-237 ◽  
Keyword(s):  
Group Theory ◽  
Nuclear Structure ◽  
Central Force ◽  
Irreducible Representations ◽  
Theoretical Studies ◽  
Matrix Elements ◽  
Energy Matrix ◽  
Body Interaction ◽  
Fractional Parentage

The orbital and charge-spin fractional parentage coefficients for the nuclear d 3 and d 4 con­figurations are derived using group theory. The orbital coefficients are given in a form appropriate to the new subclassification of the states according to irreducible representations of R 5 discussed in part I (Jahn 1950). Using these coefficients the complete energy matrices for the d 3 and d 4 configurations are derived, for a general charge-symmetric central two-body interaction, from the known energy matrix for the d 2 configuration.

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