Gravitational resonance spectroscopy with an oscillating magnetic field gradient in the GRANIT flow through arrangement

TL;DR

This paper proposes a novel method for gravitational resonance spectroscopy using an oscillating magnetic field gradient in a flow-through setup, enabling precise measurement of ultracold neutron energy levels.

Contribution

It introduces a new AC mode for inducing resonances in gravitational spectroscopy with ultracold neutrons, supported by feasibility calculations.

Findings

Feasibility of the AC excitation mode demonstrated through calculations

Potential for improved precision in neutron energy spectrum measurement

Versatile use of the same device for different excitation modes

Abstract

Gravitational resonance spectroscopy consists in measuring the energy spectrum of bouncing ultracold neutrons above a mirror by inducing resonant transitions between different discrete quantum levels. We discuss how to induce the resonances with a flow through arrangement in the GRANIT spectrometer, excited by an oscillating magnetic field gradient. The spectroscopy could be realized in two distinct modes (so called DC and AC) using the same device to produce the magnetic excitation. We present calculations demonstrating the feasibility of the newly proposed AC mode.