@inbook{616f64e1dd9540e687510f32021ac2be,
title = "Hydrogen Hyperfine Splitting and HI Line",
abstract = "The hydrogen atom is made of a proton and an electron. They are spin-1/2 fermions and have magnetic moments (MM). The magnetic moment-magnetic moment (MM-MM) interaction takes place in the hydrogen atom.",
author = "Fumihiko Suekane",
note = "Publisher Copyright: {\textcopyright} 2021, Springer Nature Switzerland AG.",
year = "2021",
doi = "10.1007/978-3-030-70527-5_3",
language = "English",
series = "Lecture Notes in Physics",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "27--38",
booktitle = "Lecture Notes in Physics",
address = "Germany",
}