Positronium in space: Proposal for detection

作     者：Burdyuzha, V.V. Kauts, V.L. 

作者机构：Astro Space Ctr. Lebedev Phys. I. Moscow Profsoyuznaya 84/32 Russian Federation 

出 版 物：《Astrophysics and Space Science》 (Astrophys. Space Sci.)

年 卷 期：1997年第258卷第1-2期

页      面：329-335页

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

摘      要：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.