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Iwai, R; Abe, M; Fukumura, S; Hiraishi, M; Kanda, S; Kawamura, S; Nishimura, S; Okabe, H; Sasaki, K; Strasser, P; Shimomura, K; Tada, H; Teshima, N; Torii, H A
Journal of physics. Conference series, 03/2023, Letnik: 2462, Številka: 1Journal Article
Abstract At J-PARC, the MuSEUM (Muonium Spectroscopy Experiment Using Microwave) collaboration aims to precisely measure the ground-state hyperfine splitting of muonium atoms arising from the muon and electron spins. The pulsed muon beam is stopped in a krypton gas cell to form muonium atoms. The transitions of spin states are induced with a microwave cavity, which are then measured by positron counters. After the previously performed successful measurements with a nearly-zero magnetic field, we are currently planning a measurement with the 2.9T magnetic field by measuring two Zeeman-split sub-levels, so that increased statistics will allow us to more precisely determine the transition frequency down to ∼1ppb. Moreover, a new microwave cavity with a unique geometry is being designed to perform the measurement at an even stronger field of 2.9T in the future.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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