Determination of the electric field gradient and the magnetic field in M\"ossbauer spectrocsopy by half-cube method

TL;DR

This paper introduces a novel half-cube method for M"ossbauer spectroscopy that accurately determines electric field gradients and magnetic field orientations in single-crystal absorbers, enabling separation of hyperfine interactions.

Contribution

The paper presents a new half-cube method with explicit formulas for determining hyperfine parameters in M"ossbauer spectroscopy, applicable to single-crystal absorbers.

Findings

Allows full separation of electric quadrupolar and magnetic dipolar interactions.

Provides explicit formulas derived from velocity moments.

Applicable to single-crystal absorbers with well-separated lines.

Abstract

This paper presents a new method to determine all components of the electric field gradient tensor and orientation of the hyperfine magnetic field axis in the absorber Cartesian frame for M\"ossbauer spectroscopy for nuclear transitions between levels with spin 3/2 and 1/2. The method can be applied for single-crystal absorbers with well separated absorption lines in their spectra. Explicit formulas derived from velocity moments are presented. The new method allows full separation of the electric quadrupolar and magnetic dipolar hyperfine interactions by using unpolarized radiation.