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AbstractAbstract
[en] The two most intense lines of the 18-cm spectrum of 170H have been detected in absorption against Sgr. A. Rest frequencies of 1626.17 +- 0.03 and 1624.43 +- 0.03 MHz have been derived. The number ratio 180H/170H of 4.2 +- 0.4 is less than the terrestrial value of 5.5. It is concluded that the 170/160 abundance ratio near the galactic centre is greater than the terrestrial value. (author)
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Monthly Notices of the Royal Astronomical Society; v. 176(2); p. 57P-60P
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