Alternative method of generating gamma rays with orbital angular momentum

TL;DR

This paper introduces a novel technique for producing gamma rays carrying orbital angular momentum by using laser-irradiated, accelerated ions to excite them to high angular momentum states, resulting in gamma-ray emission with OAM.

Contribution

It presents a new method utilizing partially-stripped ions and laser excitation to generate gamma rays with orbital angular momentum, a novel approach in the field.

Findings

Calculated excitation cross section and deexcitation rate.

Demonstrated feasibility of gamma-ray OAM generation.

Proposed experimental setup for implementation.

Abstract

We propose a new method of generating gamma rays with orbital angular momentum (OAM). Accelerated partially-stripped ions are used as an energy up-converter. Irradiating an optical laser beam with OAM on ultrarelativistic ions, they are excited to a state of large angular momentum. Gamma rays with OAM are emitted in their deexcitation process. We examine the excitation cross section and deexcitation rate.