Abstract

Herein, evidence for the long-sought finite hyperfine interaction in the high-pressure hexagonal close-packed ε-iron is gained through synchrotron radiation perturbed angular correlation spectroscopy. This method yields an energy splitting of 3.5(5)neV between the mIe= ± 1/2 and mIe = ± 3/2 nuclear sublevels of the iron-57 14.412-keV nuclear excited state at 30(1)GPa and room temperature. This energy splitting is related to a nuclear quadrupole hyperfine interaction with an electric field gradient of eq=1.2(2) x 1016V/cm2. However, there is still a possibility that the splitting of the iron-57 nuclear levels is related to a modest magnetic hyperfine interaction of ca. 0.40(5) T.

Department(s)

Chemistry

Keywords and Phrases

Electric fields; Excited states; Synchrotron radiation, Electric field gradients; Energy splittings; Hexagonal close packed; High pressure; Hyperfine interactions; Nuclear levels; Nuclear quadrupole; Perturbed angular correlation spectroscopy, Iron

International Standard Serial Number (ISSN)

2469-9950; 2469-9969

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2020 American Physical Society (APS), All rights reserved.

Publication Date

01 Jan 2020

Included in

Chemistry Commons

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