Pressure Dependence of X-Ray Yields in Protonium
The shift and width of the 1s state have been taken from the most recent calculations by Richard and Sainio4. The calculation by Kaufmann, based on a boundary condition model5, gives essentially the same result, namely Γ1S=700 eV, ΔE1S=1000eV (spin averaged). In most of the present work, the annihilation width of the 2p state was taken to be 30 meV, or 75 times the radiative width, also in accordance with the calculations of Refs. 4 and 5.
The role of Coulomb deexcitation, as proposed by Bracci and Fiorentini6 has been studied.
KeywordsPressure Dependence Moderate Pressure Radiative Width Muonic Hydrogen Coulomb Deexcitation
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