Abstract
The present thesis deals with the one-valence-particle nuclei {sup 147}Tb and {sup 151}Er. The main purpose of the study was, to study characteristic properties of the particle-phonon excitations of these nuclei. In the one-valence-proton nucleus {sup 147}Tb from the {pi}h{sub 11/2}x3{sup -} septet only the 15/2{sup +} and 17/2{sup +} Yrast states were known, which underly a strong diagonal exchange interaction. At mass separators in {beta} decay experiments of the 1/2{sup +} and the 11/2{sup -} {sup 147}Dy activities and in in-beam experiments layed out on excitation of states above the Yrast line with {sup 6}Li beams the nucleus {sup 147}Tb was spectroscoped. The combination of these three data sets made the nearly complete covering of the spin range from 1/2 to 27/2 of the low-lying states in {sup 147}Tb possible. At the whole in this nucleus more than 100 hitherto unknown states could be placed and farly characterized. The unusually manifold data allowed to identify beside the complete {pi}h{sub 11/2}x3{sup -} septet also very much further particlexphonon states. Furthermore in the excitation range between 2.5 and 4 MeV numerous three-quasiparticle excitations were observed and in very sufficient way described by parameter-free shell-model calculations. A further important result is the
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Citation Formats
Collatz, R D.
Particle-phonon excitations in valence-neutron and valence-proton nuclei around {sup 146}Gd; Teilchen-Phononanregungen in Valenzneutron- und Valenzprotonkernen um {sup 146}Gd.
Germany: N. p.,
1994.
Web.
Collatz, R D.
Particle-phonon excitations in valence-neutron and valence-proton nuclei around {sup 146}Gd; Teilchen-Phononanregungen in Valenzneutron- und Valenzprotonkernen um {sup 146}Gd.
Germany.
Collatz, R D.
1994.
"Particle-phonon excitations in valence-neutron and valence-proton nuclei around {sup 146}Gd; Teilchen-Phononanregungen in Valenzneutron- und Valenzprotonkernen um {sup 146}Gd."
Germany.
@misc{etde_10110200,
title = {Particle-phonon excitations in valence-neutron and valence-proton nuclei around {sup 146}Gd; Teilchen-Phononanregungen in Valenzneutron- und Valenzprotonkernen um {sup 146}Gd}
author = {Collatz, R D}
abstractNote = {The present thesis deals with the one-valence-particle nuclei {sup 147}Tb and {sup 151}Er. The main purpose of the study was, to study characteristic properties of the particle-phonon excitations of these nuclei. In the one-valence-proton nucleus {sup 147}Tb from the {pi}h{sub 11/2}x3{sup -} septet only the 15/2{sup +} and 17/2{sup +} Yrast states were known, which underly a strong diagonal exchange interaction. At mass separators in {beta} decay experiments of the 1/2{sup +} and the 11/2{sup -} {sup 147}Dy activities and in in-beam experiments layed out on excitation of states above the Yrast line with {sup 6}Li beams the nucleus {sup 147}Tb was spectroscoped. The combination of these three data sets made the nearly complete covering of the spin range from 1/2 to 27/2 of the low-lying states in {sup 147}Tb possible. At the whole in this nucleus more than 100 hitherto unknown states could be placed and farly characterized. The unusually manifold data allowed to identify beside the complete {pi}h{sub 11/2}x3{sup -} septet also very much further particlexphonon states. Furthermore in the excitation range between 2.5 and 4 MeV numerous three-quasiparticle excitations were observed and in very sufficient way described by parameter-free shell-model calculations. A further important result is the manifestation of a neutron-one-particle-one-hole state with I=27/2, which lies with 3.7 MeV excitation close to the Yrast line. (orig./HSI)}
place = {Germany}
year = {1994}
month = {Jul}
}
title = {Particle-phonon excitations in valence-neutron and valence-proton nuclei around {sup 146}Gd; Teilchen-Phononanregungen in Valenzneutron- und Valenzprotonkernen um {sup 146}Gd}
author = {Collatz, R D}
abstractNote = {The present thesis deals with the one-valence-particle nuclei {sup 147}Tb and {sup 151}Er. The main purpose of the study was, to study characteristic properties of the particle-phonon excitations of these nuclei. In the one-valence-proton nucleus {sup 147}Tb from the {pi}h{sub 11/2}x3{sup -} septet only the 15/2{sup +} and 17/2{sup +} Yrast states were known, which underly a strong diagonal exchange interaction. At mass separators in {beta} decay experiments of the 1/2{sup +} and the 11/2{sup -} {sup 147}Dy activities and in in-beam experiments layed out on excitation of states above the Yrast line with {sup 6}Li beams the nucleus {sup 147}Tb was spectroscoped. The combination of these three data sets made the nearly complete covering of the spin range from 1/2 to 27/2 of the low-lying states in {sup 147}Tb possible. At the whole in this nucleus more than 100 hitherto unknown states could be placed and farly characterized. The unusually manifold data allowed to identify beside the complete {pi}h{sub 11/2}x3{sup -} septet also very much further particlexphonon states. Furthermore in the excitation range between 2.5 and 4 MeV numerous three-quasiparticle excitations were observed and in very sufficient way described by parameter-free shell-model calculations. A further important result is the manifestation of a neutron-one-particle-one-hole state with I=27/2, which lies with 3.7 MeV excitation close to the Yrast line. (orig./HSI)}
place = {Germany}
year = {1994}
month = {Jul}
}