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Evolution of nuclear spectra with nuclear forces.

R B Wiringa¹, Steven C Pieper

¹Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. wiringa@anl.gov

Physical Review Letters

|October 26, 2002

Summary

The spin, isospin, and tensor forces are crucial for nuclear stability. Realistic nuclear forces explain the absence of stable five- and eight-body nuclei.

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Area of Science:

Nuclear Physics
Quantum Mechanics
Computational Physics

Background:

Understanding the fundamental forces governing atomic nuclei is essential in nuclear physics.
Previous models often simplified nuclear interactions, limiting predictive power for nuclear structure.

Purpose of the Study:

To investigate the impact of increasingly sophisticated nuclear forces on the properties of light nuclei.
To determine the key components of the nuclear force responsible for the stability of nuclei.

Main Methods:

Development of a series of nuclear (NN) interaction models, from simple to realistic.
Application of Green's function Monte Carlo (GFMC) calculations to study light nuclei.
Systematic analysis of nuclear spectra as a function of nuclear force complexity.

Main Results:

Nuclear spectra were observed to evolve significantly with the sophistication of nuclear forces.
The absence of stable five- and eight-body nuclei was found to be critically dependent on specific force components.
Spin, isospin, and tensor components of the nuclear force were identified as crucial factors for nuclear stability.

Conclusions:

The detailed structure of nuclear forces, particularly spin, isospin, and tensor components, is vital for nuclear existence.
Realistic nuclear interactions are necessary to accurately predict the stability and spectra of light nuclei.
GFMC calculations provide a robust framework for studying nuclear systems with complex interactions.

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