The interacting boson model (IBM) is a model
in nuclear physics in which
nucleons (protons or neutrons) pair up, essentially
acting as a single particle with boson properties,
with
integral spin of 0, 2 or 4.
It is sometimes known as the Interacting boson
approximation (IBA).The IBM1/IBM-I model treats
both types of nucleons the same and considers
only pairs of nucleons coupled to
total angular momentum 0 and 2, called respectively,
s and d bosons.
The IBM2/IBM-II model treats protons and neutrons
separately.
Both models are restricted to nuclei with
even numbers of protons and neutrons.
The model can be used to predict vibrational
and rotational modes of non-spherical nuclei.
== History ==
This model was invented by Akito Arima and
Francesco Iachello in 1974.
== See also ==
Liquid drop model
Nuclear shell model
