The coulomb term and asymmetry term appear in a semi-empirical formula for their mass, which is obtained by treating them as a liquid drop.
The Nilsson model of these structures accounts for deformations which can result in shapes resembling pears, peanuts, and the theoretically possible "banana". Low energy states in these structures are called yrast states. These entities cannot undergo isoscalar dipole vibrations because it shifts their center of mass, so the lowest vibrational mode they experience is quadrupolar. A denominator of 1 plus various deformation parameters obtained from the spherical harmonics is found in a formula for the (*) charge density of this structure obtained from the Woods-Saxon potential. The coulomb term and asymmetry term appear in a semi-empirical formula for their mass, which is obtained by treating them as a liquid drop. These entities can be described as even-even or odd-odd depending on the number of their constituents. It is believed there will be an "island of stability" for a set of these entities whose compositions are near a magic number whose values include 2, 20, and 126. For 10 points, name this atomic structure formed of protons and neutrons.
The Nilsson model of these structures accounts for deformations which can result in shapes resembling pears, peanuts, and the theoretically possible "banana".
atomic nucleus [or atomic nuclei] 