COMPARISON OF ELECTRON AND PROTON IONIZATION DATA WITH THE BORN APPROXIMATION PREDICTIONS
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
A comparison is made of the experimental ionization cross sections for protons and electrons incident at the same velocity of relative motion on He, Ne, Ar, H, N, O, and CO. For a given target gas, the Born approximation predicts the proton and electron cross sections to be equal at the same velocity of relative motion, provided the velocity is sufficiently high. This prediction holds for these gases at electron energies above about 300 ev, The corresponding proton energy is 552 kev. The experimertal cross sections as functions of energy for incident protons on these gases were fitted to the theoretical expression of Bethe to obtain empirical values of the several parameters. For H, these agree satisfactorily with theoretical values obtained by Bethe. Similar comparisons carnot be made for the other gases since numerical values for these quantities are not calculated. Proton ionization data can be fitted to the Born approximation to a lower projectile velocity than can the corresponding electron data. (auth)
- Research Organization:
- Georgia Inst. of Tech., Atlanta
- NSA Number:
- NSA-16-015569
- OSTI ID:
- 4783150
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 125; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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