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- W1489715400 abstract "The note reports results of an unsuccessful search for the four hyperfine transitions in the cited rotational state of interstellar CH, which was performed using a 25.6-m radio telescope equipped with a traveling-wave maser radiometer. The frequency interval covered ranged from 4677 to 4850 MHz; the sources observed were W3 Cont, W51, Orion A, and IRC+10216. It is shown that the lines in the present excited state cannot be expected to be observed if the state is populated according to thermodynamic equilibrium at the kinetic temperature of the medium. The possibility is considered of detecting thermally excited CH in a more compact region and of detecting excited-state CH maser lines. It is concluded that no strong CH maser lines exist for the frequencies and sources covered." @default.
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- W1489715400 date "1976-08-01" @default.
- W1489715400 modified "2023-09-23" @default.
- W1489715400 title "Search for radiation from the 2 pi 1/2, J = 5/2 state of interstellar CH" @default.
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