Refine your search:     
Report No.
 - 

Nuclear moments of the radioactive isotope $$^{131}$$La determined by collinear fast-beam laser spectroscopy

Iimura, Hideki; Schuessler, H. A.*; Buchinger, F.*; Cocolios, T.*; Crawford, J. E.*; Gulick, S.*; Lee, J. K. P.*; Levy, C. D. P.*; Pearson, M.*; Lioubimov, V.*; Zhu, F.*; Rikovska, J.*; Rosner, S. D.*; Thompson, R.*; Wyss, R.*

We report measurements of the hyperfine structure constants of $$^{131}$$La (N=74) as an initial step to further exploring the neutron deficient rare-earth region where a sudden onset of nuclear deformation is predicted theoretically around N=74. This work is an extension of our earlier off-line experiments on $$^{135,137-139}$$La to on-line laser spectroscopy. The radioactive isotope $$^{131}$$La (T$$_{1/2}$$=59 min) was produced by means of a spallation reaction using a proton beam from TRIUMF cyclotron. The hyperfine spectra were observed by using the method of collinear fast-beam laser spectroscopy. From the obtained hyperfine constants, the nuclear moments of $$^{131}$$La were derived. In order to arrive at an understanding of the nuclear structure of $$^{131}$$La, we have carried out particle triaxial-rotor calculations. The results from the calculation reproduce well the experimental values when a triaxial shape is assumed for $$^{131}$$La.

Accesses

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.