Coexistence in even-even nuclei with emphasis on the germanium isotopes

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5553251

Carchidi, M A.V.

No simple model to date can explain in a self-consistent way the results of direct transfer data and BE2 electromagnetic rates in the germanium isotopes. The simplest models use a two-state interaction for describing the ground state and first excited O/sup +/ state. In all cases, these models can account for some of the data, but they are in drastic conflict with other experimental measurements. In this thesis, it is shown that a two-state model can consistently account for two-neutron and alpha transfer O/sup +//sub 2//g.s. cross-section ratio data in the germanium region (ie. zinc, germanium, and selenium), proton occupation number data in the ground states of the even stable zinc, germanium, and selenium isotopes, and BE2 transition rates in isotopes of germanium and zinc. In addition the author can account for most of the one-neutron and two-neutron transfer O/sup +//sub 2//g.s. and (9/2/sup +//sub 2/)/(9/2/sup +//sub 1/) cross-section ratio data in the odd-mass germanium isotopes. In this generalized two-state model (called Rerg1), the author makes as few assumptions as possible about the nature of the basis states; rather the author allows the experimental data to dictate the properties of the basis-state overlaps. In this sense, the author has learned much about the basis states and has a useful tool for constructing them. The author also shows that the Rerg1 model can quantitatively account for all two-neutron O/sup +//sub 2//g.s. cross-section ratio data in all even-even nuclei from calcium to uranium.

• Research Organization: Pennsylvania Univ., Philadelphia (USA)
• OSTI ID: 5553251
• Country of Publication: United States
• Language: English

Related Subjects

651613 -- Nuclear Properties & Reactions
A=59-89
Theoretical-- Energy Levels & Transitions-- (-1987)
651615* -- Nuclear Properties & Reactions
A=59-89
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CROSS SECTIONS
DATA
DIRECT REACTIONS
E2-TRANSITIONS
ELEMENTS
ENERGY-LEVEL TRANSITIONS
GERMANIUM
INFORMATION
MATHEMATICAL MODELS
METALS
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICAL DATA
SELENIUM
SEMIMETALS
THEORETICAL DATA
TRANSFER REACTIONS
ZINC