Nuclear structure of Ac-231
Nuclear Experiment
2008-11-26 v1
Abstract
The low-energy structure of 231Ac has been investigated by means of gamma ray spectroscopy following the beta-decay of 231Ra. Multipolarities of 28 transitions have been established by measuring conversion electrons with a mini-orange electron spectrometer. The decay scheme of 231Ra --> 231Ac has been constructed for the first time. The Advanced Time Delayed beta-gamma-gamma(t) method has been used to measure the half-lives of five levels. The moderately fast B(E1) transition rates derived suggest that the octupole effects, albeit weak, are still present in this exotic nucleus.
Cite
@article{arxiv.0808.0790,
title = {Nuclear structure of Ac-231},
author = {R. Boutami and M. J. G. Borge and H. Mach and W. Kurcewicz and L. M. Fraile and K. Gulda and A. J. Aas and L. M. García-Raffi and G. Løvhøiden and T. Martínez and B. Rubio and J. L. Taín and O. Tengblad},
journal= {arXiv preprint arXiv:0808.0790},
year = {2008}
}