Impact-parameter independence of participant energy spectra measured in symmetric heavy-ion collisions

C. A. Pruneau; G. C. Ball; E. Hagberg; D. Horn; S. Gilbert; L. Potvin; C. Rioux; C. St-Pierre; T. E. Drake; A. Galindo-Uribarri; G. Zwartz; D. A. Cebra; S. Howden; J. Karn; C. A. Ogilvie; A. Vander Molen; G. D. Westfall; W. K. Wilson; J. S. Winfield

doi:10.1016/0375-9474(91)90563-L

Impact-parameter independence of participant energy spectra measured in symmetric heavy-ion collisions

C. A. Pruneau, G. C. Ball, E. Hagberg, D. Horn, S. Gilbert, L. Potvin, C. Rioux, C. St-Pierre, T. E. Drake, A. Galindo-Uribarri, G. Zwartz, D. A. Cebra, S. Howden, J. Karn, C. A. Ogilvie, A. Vander Molen, G. D. Westfall, W. K. Wilson, J. S. Winfield

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5 Scopus citations

Abstract

A reaction filter of nearly 4π sr geometry is presented. Its ability to tag heavy-ion collisions according to their centrality is established by a comparison of experimental data with computer simulations and BUU model calculations in which events of known impact parameter are filtered by the instrumental acceptance. On the one hand, energy spectra of light charged particles from reactions of ²⁰Ne at 35 and 45 MeV/nucleon with a NaF target show little dependence of their high-energy slopes upon the relative impact parameters determined by this technique. On the other hand, spectra from ²⁰Ne on ⁴⁵Sc and ¹⁹⁷Au targets display increasing slopes with increasing centrality. Such a difference between symmetric and asymmetric systems is consistent with the formation of a "participant" zone.

Original language	English
Pages (from-to)	204-220
Number of pages	17
Journal	Nuclear Physics A
Volume	534
Issue number	1
DOIs	https://doi.org/10.1016/0375-9474(91)90563-L
State	Published - Nov 11 1991
Externally published	Yes

Funding

We wish to acknowledge the valuable results communicated by the authors of ref.'3)priortopublication.ThisworkwassupportedinpartbytheNaturalSciences and Engineering Research Council of Canada and by the U.S. National Science Foundation .

Funders	Funder number
Engineering Research Council of Canada
U.S. National Science Foundation

Keywords

Nuclear reactions

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10.1016/0375-9474(91)90563-L

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Pruneau, C. A., Ball, G. C., Hagberg, E., Horn, D., Gilbert, S., Potvin, L., Rioux, C., St-Pierre, C., Drake, T. E., Galindo-Uribarri, A., Zwartz, G., Cebra, D. A., Howden, S., Karn, J., Ogilvie, C. A., Vander Molen, A., Westfall, G. D., Wilson, W. K., & Winfield, J. S. (1991). Impact-parameter independence of participant energy spectra measured in symmetric heavy-ion collisions. Nuclear Physics A, 534(1), 204-220. https://doi.org/10.1016/0375-9474(91)90563-L

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title = "Impact-parameter independence of participant energy spectra measured in symmetric heavy-ion collisions",

abstract = "A reaction filter of nearly 4π sr geometry is presented. Its ability to tag heavy-ion collisions according to their centrality is established by a comparison of experimental data with computer simulations and BUU model calculations in which events of known impact parameter are filtered by the instrumental acceptance. On the one hand, energy spectra of light charged particles from reactions of 20Ne at 35 and 45 MeV/nucleon with a NaF target show little dependence of their high-energy slopes upon the relative impact parameters determined by this technique. On the other hand, spectra from 20Ne on 45Sc and 197Au targets display increasing slopes with increasing centrality. Such a difference between symmetric and asymmetric systems is consistent with the formation of a {"}participant{"} zone.",

keywords = "Nuclear reactions",

author = "Pruneau, {C. A.} and Ball, {G. C.} and E. Hagberg and D. Horn and S. Gilbert and L. Potvin and C. Rioux and C. St-Pierre and Drake, {T. E.} and A. Galindo-Uribarri and G. Zwartz and Cebra, {D. A.} and S. Howden and J. Karn and Ogilvie, {C. A.} and {Vander Molen}, A. and Westfall, {G. D.} and Wilson, {W. K.} and Winfield, {J. S.}",

year = "1991",

month = nov,

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doi = "10.1016/0375-9474(91)90563-L",

language = "English",

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Pruneau, CA, Ball, GC, Hagberg, E, Horn, D, Gilbert, S, Potvin, L, Rioux, C, St-Pierre, C, Drake, TE, Galindo-Uribarri, A, Zwartz, G, Cebra, DA, Howden, S, Karn, J, Ogilvie, CA, Vander Molen, A, Westfall, GD, Wilson, WK & Winfield, JS 1991, 'Impact-parameter independence of participant energy spectra measured in symmetric heavy-ion collisions', Nuclear Physics A, vol. 534, no. 1, pp. 204-220. https://doi.org/10.1016/0375-9474(91)90563-L

TY - JOUR

T1 - Impact-parameter independence of participant energy spectra measured in symmetric heavy-ion collisions

AU - Pruneau, C. A.

AU - Ball, G. C.

AU - Hagberg, E.

AU - Horn, D.

AU - Gilbert, S.

AU - Potvin, L.

AU - Rioux, C.

AU - St-Pierre, C.

AU - Drake, T. E.

AU - Galindo-Uribarri, A.

AU - Zwartz, G.

AU - Cebra, D. A.

AU - Howden, S.

AU - Karn, J.

AU - Ogilvie, C. A.

AU - Vander Molen, A.

AU - Westfall, G. D.

AU - Wilson, W. K.

AU - Winfield, J. S.

PY - 1991/11/11

Y1 - 1991/11/11

N2 - A reaction filter of nearly 4π sr geometry is presented. Its ability to tag heavy-ion collisions according to their centrality is established by a comparison of experimental data with computer simulations and BUU model calculations in which events of known impact parameter are filtered by the instrumental acceptance. On the one hand, energy spectra of light charged particles from reactions of 20Ne at 35 and 45 MeV/nucleon with a NaF target show little dependence of their high-energy slopes upon the relative impact parameters determined by this technique. On the other hand, spectra from 20Ne on 45Sc and 197Au targets display increasing slopes with increasing centrality. Such a difference between symmetric and asymmetric systems is consistent with the formation of a "participant" zone.

AB - A reaction filter of nearly 4π sr geometry is presented. Its ability to tag heavy-ion collisions according to their centrality is established by a comparison of experimental data with computer simulations and BUU model calculations in which events of known impact parameter are filtered by the instrumental acceptance. On the one hand, energy spectra of light charged particles from reactions of 20Ne at 35 and 45 MeV/nucleon with a NaF target show little dependence of their high-energy slopes upon the relative impact parameters determined by this technique. On the other hand, spectra from 20Ne on 45Sc and 197Au targets display increasing slopes with increasing centrality. Such a difference between symmetric and asymmetric systems is consistent with the formation of a "participant" zone.

KW - Nuclear reactions

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DO - 10.1016/0375-9474(91)90563-L

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VL - 534

SP - 204

EP - 220

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1

ER -

Impact-parameter independence of participant energy spectra measured in symmetric heavy-ion collisions

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