Inelastic cross sections for positron scattering from atomic hydrogen

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Positronium formation (Ps) cross sections for positrons impinging on atomic hydrogen were measured in the impact energy range from 13eV to 255eV at the High Intensity Positron (HIP) beam at Brookhaven National Laboratory (BNL). The Ps-formation cross section was found to rise rapidly from the threshold at 6.8eV to a maximum value of (2.98 {plus_minus} 0.18) {times} 10{sup {minus}16} cm{sup 2} for {approx} 15eV positrons. By 75eV it drops below the detection limit of 0.17 {times} 10{sup {minus}16} cm{sup 2} which is the present level of statistical uncertainty. The experiment was modified to enable the measurement of doubly differential scattering ... continued below

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6 p.

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Weber, M.; Hofmann, A.; Raith, W.; Sperber, W.; Jacobsen, F. & Lynn, K.G. December 31, 1994.

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Description

Positronium formation (Ps) cross sections for positrons impinging on atomic hydrogen were measured in the impact energy range from 13eV to 255eV at the High Intensity Positron (HIP) beam at Brookhaven National Laboratory (BNL). The Ps-formation cross section was found to rise rapidly from the threshold at 6.8eV to a maximum value of (2.98 {plus_minus} 0.18) {times} 10{sup {minus}16} cm{sup 2} for {approx} 15eV positrons. By 75eV it drops below the detection limit of 0.17 {times} 10{sup {minus}16} cm{sup 2} which is the present level of statistical uncertainty. The experiment was modified to enable the measurement of doubly differential scattering cross sections.

Physical Description

6 p.

Notes

INIS; OSTI as DE95013845

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  • 10. international conference on positron annihilation, Beijing (China), 23-29 May 1994

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  • Other: DE95013845
  • Report No.: BNL--61720
  • Report No.: CONF-9405170--10
  • Grant Number: AC02-76CH00016
  • DOI: 10.2172/79980 | External Link
  • Office of Scientific & Technical Information Report Number: 79980
  • Archival Resource Key: ark:/67531/metadc736992

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  • December 31, 1994

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • Nov. 20, 2015, 9:37 p.m.

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Weber, M.; Hofmann, A.; Raith, W.; Sperber, W.; Jacobsen, F. & Lynn, K.G. Inelastic cross sections for positron scattering from atomic hydrogen, report, December 31, 1994; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc736992/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.