The stopping of fast protons in the accretion column of a neutron star

Details The stopping of fast protons in the accretion column of a neutron star The stopping of fast protons in the accretion column of a neutron star

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195p..45k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 195, May 1981, p. 45P-50P.

Astronomy and Astrophysics

Astronomy

23

Neutron Stars, Particle Motion, Plasma-Particle Interactions, Protons, Stellar Mass Accretion, Fokker-Planck Equation, Plasma Density

Scientific paper

New calculations are performed of the Fokker-Planck coefficients for a proton in an accretion plasma. The resulting Fokker-Planck equation is solved numerically to ascertain the stopping length of the proton. It is found that for an infall velocity of c/4 into a plasma of temperature 5 keV and density 10 to the 23rd particles/cu cm, only 0.6 g/sq cm is required to stop the proton. This result is considered to derive from the fact that the gyro radius of the proton is smaller than the plasmas Debye screening length.

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