Atomic few-body systems with muonium

作者：Frolov Alexei M^*

来源：Journal of Physics B: Atomic, Molecular and Optical Physics , 2017, 50(10): 105102.

DOI：10.1088/1361-6455/aa6a40

• muonium
• positron
• adiabatic

Properties of some few-body systems which include one positively charged muon mu(+) and two electrons e(-) are discussed. In particular, we consider the negatively charged muonium ion Mu(-) or mu(+)e(2)(-)) and four-body MuPs (or mu(+)e(2)(-)e(+)) systems, each of which has only one stable bound (ground) state. The problem of annihilation of the electron-positron pair(s) in the MuPs system is investigated. The hyperfine structure splitting of the ground state in the MuPs system evaluated with our expectation value of the muon-positron delta-function is Delta approximate to 23.05758 MHz. Another group of interesting four-body neutral systems investigated in this study includes the p(+) mu(+) e(2)(-), d(+) mu(+) e(2)(-) and t(+) mu(+) e(2)(-) 'quasi-molecules'. These quasi-molecules are formed in large numbers when positively charged muons slow down in liquid hydrogen, or in liquid deuterium and/or tritium. The properties of these systems are unique, since they occupy an intermediate position between actual two-center molecules and one-center atoms.

• 出版日期2017-5-28