skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nuclear Data Sheets for A = 229

Abstract

The evaluators present in this publication spectroscopic data and level schemes from radioactive decay and nuclear reaction studies for all nuclei with mass number A = 229. These nuclei belong to a region of coexisting quadrupole with possible octupole deformations. The latter have been observed in {sup 229}Ra, but in {sup 229}Pa the experimental evidence is inconclusive. The present evaluation of A = 229, which includes all data received by June 2008, supersedes the 1989 evaluation by Y.A. Akovali, published in Nuclear Data Sheets58, 555 (1989). Highlights of this publication are given below: A comprehensive spectroscopic study of {sup 229}Fr(50.2 s) {beta}- decay using mass-separated sources have provided the first evidence of parity doublets in {sup 229}Ra due to nuclear octupole deformation (1999Fr33). In {sup 229}Th a level at 7.6 5 eV - the closest level to the ground state ever known - has been confirmed through extremely precise measurements of {gamma}-ray energies from {sup 233}U {alpha} decay (1994He08, 2007Be16). A nuclear level at such low energy may be used for studying a large variety of atomic properties associated to nuclear decay. The level structure in {sup 229}Pa has been interpreted in terms of the rotational model (1994Le22). Some authors,more » however, have proposed the existence of parity doublets as evidence of octupole nuclear deformation (1982Ah08). This interpretation has not been confirmed.« less

Authors:
 [1];  [2]
  1. Lawrence Berkeley National Laboratory under subcontract with National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
  2. National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
Publication Date:
OSTI Identifier:
21163758
Resource Type:
Journal Article
Journal Name:
Nuclear Data Sheets
Additional Journal Information:
Journal Volume: 109; Journal Issue: 11; Other Information: DOI: 10.1016/j.nds.2008.10.001; PII: S0090-3752(08)00080-X; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0090-3752
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ACTINIUM 229; ALPHA DECAY; BETA DECAY; EVALUATED DATA; FRANCIUM 229; GAMMA RADIATION; GROUND STATES; NEPTUNIUM 229; NUCLEAR DATA COLLECTIONS; NUCLEAR DEFORMATION; NUCLEAR REACTIONS; OCTUPOLES; PARITY; PLUTONIUM 229; PROTACTINIUM 229; QUADRUPOLES; RADIUM 229; THORIUM 229; URANIUM 229; URANIUM 233

Citation Formats

Browne, E, and Tuli, J K. Nuclear Data Sheets for A = 229. United States: N. p., 2008. Web. doi:10.1016/j.nds.2008.10.001.
Browne, E, & Tuli, J K. Nuclear Data Sheets for A = 229. United States. https://doi.org/10.1016/j.nds.2008.10.001
Browne, E, and Tuli, J K. 2008. "Nuclear Data Sheets for A = 229". United States. https://doi.org/10.1016/j.nds.2008.10.001.
@article{osti_21163758,
title = {Nuclear Data Sheets for A = 229},
author = {Browne, E and Tuli, J K},
abstractNote = {The evaluators present in this publication spectroscopic data and level schemes from radioactive decay and nuclear reaction studies for all nuclei with mass number A = 229. These nuclei belong to a region of coexisting quadrupole with possible octupole deformations. The latter have been observed in {sup 229}Ra, but in {sup 229}Pa the experimental evidence is inconclusive. The present evaluation of A = 229, which includes all data received by June 2008, supersedes the 1989 evaluation by Y.A. Akovali, published in Nuclear Data Sheets58, 555 (1989). Highlights of this publication are given below: A comprehensive spectroscopic study of {sup 229}Fr(50.2 s) {beta}- decay using mass-separated sources have provided the first evidence of parity doublets in {sup 229}Ra due to nuclear octupole deformation (1999Fr33). In {sup 229}Th a level at 7.6 5 eV - the closest level to the ground state ever known - has been confirmed through extremely precise measurements of {gamma}-ray energies from {sup 233}U {alpha} decay (1994He08, 2007Be16). A nuclear level at such low energy may be used for studying a large variety of atomic properties associated to nuclear decay. The level structure in {sup 229}Pa has been interpreted in terms of the rotational model (1994Le22). Some authors, however, have proposed the existence of parity doublets as evidence of octupole nuclear deformation (1982Ah08). This interpretation has not been confirmed.},
doi = {10.1016/j.nds.2008.10.001},
url = {https://www.osti.gov/biblio/21163758}, journal = {Nuclear Data Sheets},
issn = {0090-3752},
number = 11,
volume = 109,
place = {United States},
year = {Sat Nov 15 00:00:00 EST 2008},
month = {Sat Nov 15 00:00:00 EST 2008}
}