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Study of the nuclear structure of {sup 155}Eu; Estudo da estrutura nuclear do {sup 155}Eu

Abstract

The {sup 155}Eu nuclide was investigated by the directional angular correlation technique following the {beta} decay of {sup 155}Sm. The angular correlation measurements were carried out using a setup with 4 Ge detectors and a multi parametric data acquisition system. To perform the data analysis a new methodology was developed . The multipole mixing ratios of twenty sixty {gamma}- transitions were determined. Seven of them agreed with the results of earlier angular correlation studies and nineteen obtained for the first time confirmed the multipolarity suggested in earlier electron capture studies. Besides, the spin of the level at 1106.83 keV as well as the parity of the level at 1301.41 keV have also been suggested. The nuclear structure of {sup 155}Eu was discussed successfully in terms of the single particle model using a deformed Woods-Saxon potential plus residual pairing interaction permitting the description of the rotational quasi-proton band heads. (author)
Publication Date:
Jul 01, 2004
Product Type:
Thesis/Dissertation
Report Number:
INIS-BR-5916
Resource Relation:
Other Information: TH: Tese (Ph.D.); 43 refs., 90 figs., 6 tabs
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR CORRELATION; ANGULAR DISTRIBUTION; BETA DECAY; DECAY; ENERGY LEVELS; EUROPIUM; EUROPIUM 155; HEAVY NUCLEI; MIXING RATIO; MULTIPOLE TRANSITIONS; MULTIPOLES; NUCLEAR MODELS; NUCLEAR STRUCTURE; NUCLEI; PARTICLE PRODUCTION; QUASI PARTICLES; SAMARIUM; SAMARIUM 155
OSTI ID:
21219228
Research Organizations:
Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR09V2926087776
Availability:
Available from INIS in electronic form
Submitting Site:
BRN
Size:
155 pages
Announcement Date:
Nov 05, 2009

Citation Formats

Genezini, Frederico Antonio. Study of the nuclear structure of {sup 155}Eu; Estudo da estrutura nuclear do {sup 155}Eu. Brazil: N. p., 2004. Web.
Genezini, Frederico Antonio. Study of the nuclear structure of {sup 155}Eu; Estudo da estrutura nuclear do {sup 155}Eu. Brazil.
Genezini, Frederico Antonio. 2004. "Study of the nuclear structure of {sup 155}Eu; Estudo da estrutura nuclear do {sup 155}Eu." Brazil.
@misc{etde_21219228,
title = {Study of the nuclear structure of {sup 155}Eu; Estudo da estrutura nuclear do {sup 155}Eu}
author = {Genezini, Frederico Antonio}
abstractNote = {The {sup 155}Eu nuclide was investigated by the directional angular correlation technique following the {beta} decay of {sup 155}Sm. The angular correlation measurements were carried out using a setup with 4 Ge detectors and a multi parametric data acquisition system. To perform the data analysis a new methodology was developed . The multipole mixing ratios of twenty sixty {gamma}- transitions were determined. Seven of them agreed with the results of earlier angular correlation studies and nineteen obtained for the first time confirmed the multipolarity suggested in earlier electron capture studies. Besides, the spin of the level at 1106.83 keV as well as the parity of the level at 1301.41 keV have also been suggested. The nuclear structure of {sup 155}Eu was discussed successfully in terms of the single particle model using a deformed Woods-Saxon potential plus residual pairing interaction permitting the description of the rotational quasi-proton band heads. (author)}
place = {Brazil}
year = {2004}
month = {Jul}
}