Home / Events / Octupole Collectivity: The Odd Case of Neutron-Rich 143Ba
Octupole Collectivity: The Odd Case of Neutron-Rich 143Ba
Presented By: Chris Morse / cmorse@lbl.gov
Chris is a Postdoctoral scholar at Lawrence Berkeley National Laboratory. He began his research career as a graduate student at the National Superconducting Cyclotron Laboratory at Michigan State University, receiving his PhD in 2015 under the supervision of Prof. Hiro Iwasaki. After graduating, he held a postdoctoral research position at the University of Massachusetts Lowell before moving to Berkeley in 2018. Chris' research interests lie in the area of low-energy nuclear structure. While his curiosity was first piqued by studies related to isospin symmetry, recently his focus has shifted to the subjects of octupole collectivity as well as the structure of the heaviest isotopes.
Abstract
The neutron-rich barium nuclei have enjoyed enduring attention due to the expectation that they exhibit strong octupole correlations. The observation of enhanced octupole collectivity in 144,146Ba [1,2], consistent with octupole deformation, has further piqued the interest in this region of the nuclear chart. However, the nearby odd-mass systems have received relatively little study compared to their even-even counterparts, despite the fact that the interplay between the odd particle and the core can provide valuable information regarding the octupole collectivity in this region. In this seminar, I will discuss a recent Coulomb excitation study of 143Ba conducted to investigate the octupole collectivity of this odd-mass system. Our results indicate that 143Ba exhibits significantly lower octupole collectivity than 144,146Ba, suggesting that the possible octupole deformation inferred for these even-even nuclei has disappeared in 143Ba. [1] B. Bucher et al., PRL 116, 112503 (2016). [2] B. Bucher et al., PRL 118, 152504 (2017). Download AbstractHosted By
University of Tennessee