Positronium in Space: Proposal for Detection

Details Positronium in Space: Proposal for Detection Positronium in Space: Proposal for Detection

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ap%26ss.258..329b&link_type=abstract

Astrophysics and Space Science, v. 258, Issue 1/2, p. 329-335 (1997).

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We propose to observe the strongest recombination lines of positronium atoms Lα (2431 Å), Hα (1.3 μm), Pα (3.75 μm), the lines of fine structure of the level n=2 (1.62 cm, 2.30 cm and 3.48 cm) of the ortho Ps and the spin-flip line (0.147 cm) from probable Galactic sources of a narrow annihilation line. The Lα line may be detected by HST from sources with small extinction in their direction. The observations of the Hα and Pα lines are suitable for the best ground based IR telescopes. The maser lines of the fine structure may be observed on large radiotelescopes since the population of the upper sublevel n = 2 is higher than the population of low sublevels.

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