New PDF release: Atomic and Nuclear Clusters: Proceedings of the Second

By Professor G. S. Anagnostatos, Professor Dr. W. von Oertzen (eds.)

ISBN-10: 3642796966

ISBN-13: 9783642796968

ISBN-10: 3642796982

ISBN-13: 9783642796982

The topic of clusters - small aggregates of debris - is a subject of basic curiosity in either atomic and nuclear physics, and in addition in different fields reminiscent of the quark-structures of baryons and cosmology. The interaction among atomic and nuclear physics is a very attention-grabbing one simply because many strategies are universal to either fields (quantal results, shells, geometric buildings, collective modes, fission, etc.). those lawsuits comprise a wealth of papers illustrating the interdisciplinary position of cluster physics. a few of them are reprinted from Zeitschrift für Physik A and D.

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Extra info for Atomic and Nuclear Clusters: Proceedings of the Second International Conference at Santorini, Greece, June 28 – July 2, 1993

Sample text

N) where b is the size parameter of the four-nucleon or alpha cluster. The configuration of N alpha-clusters is then given by a Slater determinant of the 4N nucleon wave functions characterised by the distance parameter s giving the separations of the alpha-particles in the lattice in the x, y and z directions. The microscopic Hamiltonian is expressed as the sum of kinetic and potential energy terms with direct and exchange components. The total energy per particle is then calculated as a function of the size parameter b and the distance parameter s.

This 12C state preferentially breaks up into sBe+a, and is known from elastic scattering to have a large charge radius. There are no known 0+ states of 16 0 that have 8Be, 12C(02) or four alpha-particles among their decay products. There are however three 2+ states around 17 Me V that decay into sBe and at least one alpha-particle, and they may have a chain-structure. There are several other possIble candidates, and so chain states in 16 0 may still be found. Calculations of alpha-chain states in 12C and 16 0 have been made by Zamick and Zheng [45].

The second term with t3 depends quadratically on p, and the third depends on the kinetic energy density , which varies as the 5/3 power of the density in the Fermi gas limit. The kinetic term in the single-particle Hamiltonian has an effective mass that depends explicitely on the density, (11) which is not appreciably more difficult to treat than the usual Schrodinger equation with constant mass. This effective mass arise from momentum-dependent contact interactions. The momentum dependence is present in the bare nucleon-nucleon interaction and is a consequence of the meson exchange origin of it.

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Atomic and Nuclear Clusters: Proceedings of the Second International Conference at Santorini, Greece, June 28 – July 2, 1993 by Professor G. S. Anagnostatos, Professor Dr. W. von Oertzen (eds.)


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