https://doi.org/10.1140/epja/i2005-10168-1
Original Article
Single α-particle orbits and Bose-Einstein condensation in 12C
1
Laboratory of Physics, Kanto Gakuin University, 236-8501, Yokohama, Japan
2
Institute de Physique Nucléaire, F-91406, Orsay Cedex, France
* e-mail: yamada@kanto-gakuin.ac.jp
Received:
1
October
2005
Accepted:
5
November
2005
Published online:
13
December
2005
Bosonic properties of α particles such as single-α orbits and occupation numbers in J π = 0+, 2+, 1- and 3- states of 12C around the 3α threshold are investigated with the semi-microscopic 3α cluster model. As in other studies, we found that the 0+ 2 (2+ 2) state has dilute-3α-condensate-like structure in which the α particle is occupied in the single S (D) orbit with about 70% (80%) probability. The radial behaviors of the single-α orbits as well as the occupation numbers are discussed in detail in comparison with those for the 0+ 1 and 2+ 1 states together with the 1- 1 and 3- 1 states.
PACS: 21.10.Dr Binding energies and masses – / 21.10.Gv Mass and neutron distributions – / 21.60.Gx Cluster models – / 03.75.Hh Static properties of condensates; thermodynamical, statistical and structural properties –
© Società Italiana di Fisica and Springer-Verlag, 2005
