Speaker
Description
The formation of superconducting pair correlations
between like nucleons in the ground state of spherical
even-even nuclei is considered within a special Bogoliubov
transformation.
The influence of the monopole pairing interaction on
the energy of single-particle states is taken into account.
It is shown that the emergence of pair correlations
depends on the particle number and shell structure.
In open subshell nuclei the correlations exist at any
attractive monopole interaction.
In this case, nucleon pairs are distributed over all
subshells participating in the pairing interaction.
The closed shell nuclei are considered within simplified
model with constant pairing interaction.
It is confirmed that the superconducting
pair correlations appear if the coupling constant $G$
exceeds a certain threshold value.
Rough upper and lower estimates are obtained
for the threshold value.
| Section | Nuclear structure: theory and experiment |
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