Octupole Signatures in Moderately Neutron-Deficient Barium Isotopes (Paperback)

The spontaneous breaking of the spherical symmetry in the nuclear many-body problem is a long-established and thoroughly-studied topic. This work focuses in particular on octupole correlations, which cause the atomic nucleus to dynamically assume intrinsic reflection-asymmetric shapes such as a "pear" or "banana" shape. The most relevant fingerprints of these correlations are presented, along with the gamma-spectroscopy techniques that make it possible to identify them. The case of the nuclear species Barium-124 and Barium-125, populated in a fusion-evaporation reaction in which Nickel-64 projectiles impinged on a Nickel-64 target, is in particular addressed. It is shown how both barium isotopes do exhibit signatures of octupole correlations, i.e. low-lying negative-parity excited states and numerous electric-dipole transitions linking opposite-parity energy levels. It is also shown how these experimental results are consistent with theoretical expectations, as 56, the atomic number of Barium, corresponds to a single-particle configuration in which the proton Fermi level lies in the proximity of a pair of orbitals strongly coupled by the octupole interaction, i.e. h11/2 and d5/2.

General

Imprint:	Lap Lambert Academic Publishing
Country of origin:	Germany
Release date:	July 2010
First published:	July 2010
Authors:	Paolo Mason
Dimensions:	229 x 152 x 7mm (L x W x T)
Format:	Paperback - Trade
Pages:	116
ISBN-13:	978-3-8383-7358-4
Categories:	Books > Science & Mathematics > Physics > Nuclear structure physics
LSN:	3-8383-7358-8
Barcode:	9783838373584

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