Production and transport of convoy electrons in amorphous carbon foils

J. P. Gibbons; S. B. Elston; R. DeSerio; C. Biedermann; M. Breinig; C. E. Gonzalez-Lepera; O. Heil; H. P. Hülskötter; H. Rothard; I. A. Sellin; C. R. Vane

doi:10.1016/0168-583X(89)90922-1

Production and transport of convoy electrons in amorphous carbon foils

J. P. Gibbons, S. B. Elston, R. DeSerio, C. Biedermann, M. Breinig, C. E. Gonzalez-Lepera, O. Heil, H. P. Hülskötter, H. Rothard, I. A. Sellin, C. R. Vane

Nuclear Medicine

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The production of free convoy electrons, emitted with velocities near the ion velocity in ion-solid collisions, is not well understood. Experiments concerning thickness-dependent yields have suggested the dominant mechanism for convoy production is electron loss to the continuum (ELC) in the bulk of the solid. Free electrons created in the bulk are subject to multiple elastic and inelastic scattering during transport through remaining layers of the solid. We discuss double-differential measurements of convoy electrons as a function of target thickness for fast O⁵⁺ ion projectiles incident on carbon foils of varied thicknesses. Angular distributions confirm the ELC model for convoy production. From the radial broadening of the convoy cusps we have determined energy and angular spreading parameters due to postcollisional multiple scattering.

Original language	English (US)
Pages (from-to)	53-55
Number of pages	3
Journal	Nuclear Inst. and Methods in Physics Research, B
Volume	40-41
Issue number	PART 1
DOIs	https://doi.org/10.1016/0168-583X(89)90922-1
State	Published - Apr 2 1989

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/0168-583X(89)90922-1

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title = "Production and transport of convoy electrons in amorphous carbon foils",

abstract = "The production of free convoy electrons, emitted with velocities near the ion velocity in ion-solid collisions, is not well understood. Experiments concerning thickness-dependent yields have suggested the dominant mechanism for convoy production is electron loss to the continuum (ELC) in the bulk of the solid. Free electrons created in the bulk are subject to multiple elastic and inelastic scattering during transport through remaining layers of the solid. We discuss double-differential measurements of convoy electrons as a function of target thickness for fast O5+ ion projectiles incident on carbon foils of varied thicknesses. Angular distributions confirm the ELC model for convoy production. From the radial broadening of the convoy cusps we have determined energy and angular spreading parameters due to postcollisional multiple scattering.",

author = "Gibbons, {J. P.} and Elston, {S. B.} and R. DeSerio and C. Biedermann and M. Breinig and Gonzalez-Lepera, {C. E.} and O. Heil and H{\"u}lsk{\"o}tter, {H. P.} and H. Rothard and Sellin, {I. A.} and Vane, {C. R.}",

note = "Funding Information: We are grateful for the cooperation and support of the Holifield Heavy Ion Research Facility staff in making the reported measurements. This research was supported by the U.S. National Science Foundation, Physics Division and Division of International Programs, and by the U.S. Department of Energy. under contract no. DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc.",

year = "1989",

month = apr,

day = "2",

doi = "10.1016/0168-583X(89)90922-1",

language = "English (US)",

volume = "40-41",

pages = "53--55",

journal = "Nuclear Inst. and Methods in Physics Research, B",

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TY - JOUR

T1 - Production and transport of convoy electrons in amorphous carbon foils

AU - Gibbons, J. P.

AU - Elston, S. B.

AU - DeSerio, R.

AU - Biedermann, C.

AU - Breinig, M.

AU - Gonzalez-Lepera, C. E.

AU - Heil, O.

AU - Hülskötter, H. P.

AU - Rothard, H.

AU - Sellin, I. A.

AU - Vane, C. R.

N1 - Funding Information: We are grateful for the cooperation and support of the Holifield Heavy Ion Research Facility staff in making the reported measurements. This research was supported by the U.S. National Science Foundation, Physics Division and Division of International Programs, and by the U.S. Department of Energy. under contract no. DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc.

PY - 1989/4/2

Y1 - 1989/4/2

N2 - The production of free convoy electrons, emitted with velocities near the ion velocity in ion-solid collisions, is not well understood. Experiments concerning thickness-dependent yields have suggested the dominant mechanism for convoy production is electron loss to the continuum (ELC) in the bulk of the solid. Free electrons created in the bulk are subject to multiple elastic and inelastic scattering during transport through remaining layers of the solid. We discuss double-differential measurements of convoy electrons as a function of target thickness for fast O5+ ion projectiles incident on carbon foils of varied thicknesses. Angular distributions confirm the ELC model for convoy production. From the radial broadening of the convoy cusps we have determined energy and angular spreading parameters due to postcollisional multiple scattering.

AB - The production of free convoy electrons, emitted with velocities near the ion velocity in ion-solid collisions, is not well understood. Experiments concerning thickness-dependent yields have suggested the dominant mechanism for convoy production is electron loss to the continuum (ELC) in the bulk of the solid. Free electrons created in the bulk are subject to multiple elastic and inelastic scattering during transport through remaining layers of the solid. We discuss double-differential measurements of convoy electrons as a function of target thickness for fast O5+ ion projectiles incident on carbon foils of varied thicknesses. Angular distributions confirm the ELC model for convoy production. From the radial broadening of the convoy cusps we have determined energy and angular spreading parameters due to postcollisional multiple scattering.

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U2 - 10.1016/0168-583X(89)90922-1

DO - 10.1016/0168-583X(89)90922-1

M3 - Article

AN - SCOPUS:0024648355

SN - 0168-583X

VL - 40-41

SP - 53

EP - 55

JO - Nuclear Inst. and Methods in Physics Research, B

JF - Nuclear Inst. and Methods in Physics Research, B

IS - PART 1

ER -

Production and transport of convoy electrons in amorphous carbon foils

Abstract

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