## Proceedings of the International School of Physics "Enrico Fermi.", Volume 69N. Zanichelli, 1977 - Nuclear physics |

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Page 32

Our picture , to begin with , is built on the analogy with a classical liquid drop . For

a homogeneous spherical system with a sharp

small deformations described by expanding the

Our picture , to begin with , is built on the analogy with a classical liquid drop . For

a homogeneous spherical system with a sharp

**surface**at r = R , we can considersmall deformations described by expanding the

**surface**R in multipoles ( 1 ) R ...Page 46

In particular , the frequency ( 38 ) varies as A - , while the liquid - drop picture

would imply ( * ) C ~ Ai ( proportional to area ) , D ~ Aš ( total mass times

area ) , which yields w ~ ( C / D ) * ~ A - . This difference arises because the

restoring ...

In particular , the frequency ( 38 ) varies as A - , while the liquid - drop picture

would imply ( * ) C ~ Ai ( proportional to area ) , D ~ Aš ( total mass times

**surface**area ) , which yields w ~ ( C / D ) * ~ A - . This difference arises because the

restoring ...

Page 91

If G , = 0 , the lowlying excited states will mainly be built out of the states close to

the Fermi

) will be about equal and of the order of unity because of cancellations from ...

If G , = 0 , the lowlying excited states will mainly be built out of the states close to

the Fermi

**surface**( with U ; ~ Vi ~ 0 . 5 ) , which means that ( 3 . 33a ) and ( 3 . 33b) will be about equal and of the order of unity because of cancellations from ...

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### Contents

A BOHR Some aspects of rotational motion | 3 |

B R MOTTELSON Elementary excitations in the nucleus | 42 |

R BÉs and R A BROGLIA Nuclear superfluidity | 55 |

Copyright | |

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addition angular momentum appears approximation associated backbending band calculated closed collective compared comparison components configurations considered contributions corresponding coupling cross-sections deformation density dependence describe determined discussed distribution effects electron equations estimate evidence example excitation energy expected experiment experimental expression fact factor field given gives ground Hamiltonian hole included increase indicate inertia interaction Lett levels limit mass matrix elements measured modes moments motion neutron Nucl nuclear nuclei nucleons observed obtained operator orbits oscillator pairing parameters particle particular peak Phys physical possible potential predictions present processes protons quadrupole reaction region relation relative resonance respect rotational rule scattering seen shape shell model shown in fig shows simple single single-particle space spectra spectrum strength structure surface symmetry theory tion transfer transition values vibrational wave functions