Muon spin relaxation for Ar+NO2 systems in transverse and longitudinal magnetic fields
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Surface muons produced in UT-MSL were introduced into argon gas of 4.0±0.2 atm with NO2 (0–30 ppm), and muonium signals were detected in the presence of a transverse (1.7–3.4 G) and a longitudinal magnetic field (0–3.5 kG) at 295±1 K. The cross section for the transverse relaxation was (11.0±1.0)×10−16 cm2. The relaxation rates in different longitudinal magnetic fields show that the rate does not follow the conventional equation which assumes that the relaxation occurs mainly by spin-exchange interaction. Similar measurements were performed for the Mu+O2 system. These findings indicate that chemical reactions contribute to these relaxation rates.
KeywordsMagnetic Field Thin Film Argon Similar Measurement Relaxation Rate
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