Electron affinity of uranium and bound states of opposite parity in its anion

Autor:	Hongtao Liu, Yuzhu Lu, Rulin Tang, Chuangang Ning
Rok vydání:	2021
Předmět:	Physics Dipole Excited state Electron affinity Bound state Electronic structure Electron Atomic physics Relativistic quantum chemistry Ground state
Zdroj:	Physical Review A. 103
ISSN:	2469-9934 2469-9926
Popis:	The electronic structures of actinide systems are extremely complicated because of strong electron correlations and relativistic effects. The atomic actinide anion poses even more challenges for experimental and theoretical investigations due to the extra loosely bound electron. In this work, we report the electronic structure of ${\mathrm{U}}^{\ensuremath{-}}$ using the slow-electron velocity-map imaging method. The electron affinity of U was measured to be 314.97(9) meV. Two excited states of ${\mathrm{U}}^{\ensuremath{-}}$ were observed and their energies were determined to be 84(11) and 160(12) meV above its ground state, respectively. The present study provides convincing evidence that the transition between the first excited state and the ground state of ${\mathrm{U}}^{\ensuremath{-}}$ is electric dipole (E1) allowed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d3cd96a4c685c9821d9c484db74ae508 https://doi.org/10.1103/physreva.103.l050801 Zobrazit plný text záznamu