In-beam Mössbauer spectra of 57Mn implanted into lithium aluminum hydride. (April 2021)

• Record Type: Journal Article
• Authors: Sato, Yukiko; Yamada, Yasuhiro; Kobayashi, Yoshio; Kubo, M. Kenya; Mihara, Mototsugu; Sato, Wataru; Miyazaki, Jun; Nagatomo, Takashi; Ando, Takatoshi; Takahama, Noriko; Some, Kanako; Sato, Masami; Sato, Shinji; Kitagawa, Atsushi
• Is Part Of: Applied radiation and isotopes. Volume 170(2021)
• Publication Date: 2021-04
• Subjects: In-beam Mössbauer spectroscopy -- Manganese-57 -- Lithium aluminum hydride -- Iron hydride -- Density functional theory calculations; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2020.109582
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: In-beam Mössbauer spectra of 57 Mn implanted into LiAlH4 were measured at different temperatures between 17 and 300 K. The Mössbauer spectrum measured at 17 K showed two sets of doublets, which were assigned to 57 Fe atoms at substitutional sites at Al 3+ and Li + sites. The Debye temperatures θ M for the 57 Fe atoms at Al 3+ -substituted and Li + -substituted sites were estimated to be 194 K and 117 K, respectively. The assignments were confirmed by density functional theory calculations. Highlights: In-beam Mössbauer spectra of 57 Mn implanted into LiAlH4 were measured. The 57 Fe atoms occupy both Al 3+ - and Li + -substituted sites in LiAlH4 . The Al 3+ -substituted 57 Fe atoms with the tetrahedral FeH4 − structure are dominant. Density functional theory calculations were performed to confirm the assignments.