Observation of the 2p3/2 -> 2s1/2 intra-shell transition in He-like uranium

TL;DR

This paper reports the first observation and measurement of an intra-shell transition in He-like uranium, providing new data on heavy ion atomic structure using advanced spectroscopic techniques.

Contribution

It presents the first experimental observation and energy measurement of the 1s2p 3P2 to 1s2s 3S1 transition in He-like uranium, utilizing a novel experimental setup.

Findings

First observation of the intra-shell transition in He-like uranium.

Accurate energy measurement of the transition.

Use of reference Li-like uranium transition for calibration.

Abstract

We present the first observation of the 1s2p 3P2 ? 1s2s 3S1 transition in He-like uranium. The experiment was performed at the internal gas-jet target of the ESR storage ring at GSI exploiting a Bragg crystal spectrometer and a germanium solid state detector. Using the 1s2 2p 2P3/2 ? 1s2 2s 2S1/2 transition in Li-like uranium as reference and the deceleration capabilities of the ESR storage rings, we obtained the first evaluation of the He-like heavy ion intra-shell transition energy.