Electromagnetic dissociation of relativistic Si28 into p+27Al

J. Barrette; R. Bellwied; P. Braun-Munzinger; W. E. Cleland; G. David; J. Dee; O. Dietzsch; E. Duek; M. Fatyga; D. Fox; S. V. Greene; J. R. Hall; T. K. Hemmick; N. Herrmann; R. W. Hogue; B. Hong; K. Jayananda; D. Kraus; B. Shiva Kumar; R. Lacasse; D. Lissauer; W. J. Llope; T. Ludlam; R. Majka; D. Makowiecki; S. K. Mark; S. McCorkle; J. T. Mitchell; M. Muthuswamy; E. O Brien; V. Polychronakos; C. Pruneau; F. S. Rotondo; J. Sandweiss; J. Simon-Gillo; U. Sonnadara; J. Stachel; H. Takai; E. M. Takagui; T. G. Throwe; L. Waters; W. J. Willis; C. Winter; K. Wolf; D. Wolfe; C. L. Woody; N. Xu; Y. Zhang; Z. Zhang; Z. Zou

doi:10.1103/PhysRevC.45.2427

Electromagnetic dissociation of relativistic Si28 into p+27Al

J. Barrette, R. Bellwied, P. Braun-Munzinger, W. E. Cleland, G. David, J. Dee, O. Dietzsch, E. Duek, M. Fatyga, D. Fox, S. V. Greene, J. R. Hall, T. K. Hemmick, N. Herrmann, R. W. Hogue, B. Hong, K. Jayananda, D. Kraus, B. Shiva Kumar, R. LacasseD. Lissauer, W. J. Llope, T. Ludlam, R. Majka, D. Makowiecki, S. K. Mark, S. McCorkle, J. T. Mitchell, M. Muthuswamy, E. O Brien, V. Polychronakos, C. Pruneau, F. S. Rotondo, J. Sandweiss, J. Simon-Gillo, U. Sonnadara, J. Stachel, H. Takai, E. M. Takagui, T. G. Throwe, L. Waters, W. J. Willis, C. Winter, K. Wolf, D. Wolfe, C. L. Woody, N. Xu, Y. Zhang, Z. Zhang, Z. Zou

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

12 Citations (Scopus)

Abstract

We report a direct measurement of the final-state energy spectrum in the electromagnetic dissociation of Si28 into p+ Al27 at an energy of 14.6 GeV/nucleon. The final-state energy is obtained through a calculation of the p-27Al invariant mass in kinematically reconstructed events. The final-state energy spectrum for all targets is peaked near the isovector giant-dipole resonance in Si28 and the dependence of the magnitude of the cross section on target charge confirms that the excitation is largely electromagnetic. By exploiting the expected scaling behavior on target Z and A, the background from nuclear interactions is evaluated and subtracted, leaving a pure electromagnetic dissociation final-state energy distribution. This distribution is well reproduced by simulated events, in which the photon spectrum calculated in the Weiszäcker-Williams approximation is combined with experimental data on the photonuclear reaction Si28(,p) Al27, and slight differences are observed only at low final-state energy.

Original language	English
Pages (from-to)	2427-2437
Number of pages	11
Journal	Physical Review C
Volume	45
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.45.2427
Publication status	Published - 1992
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.45.2427

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Barrette, J., Bellwied, R., Braun-Munzinger, P., Cleland, W. E., David, G., Dee, J., Dietzsch, O., Duek, E., Fatyga, M., Fox, D., Greene, S. V., Hall, J. R., Hemmick, T. K., Herrmann, N., Hogue, R. W., Hong, B., Jayananda, K., Kraus, D., Shiva Kumar, B., ... Zou, Z. (1992). Electromagnetic dissociation of relativistic Si28 into p+27Al. Physical Review C, 45(5), 2427-2437. https://doi.org/10.1103/PhysRevC.45.2427

Barrette, J, Bellwied, R, Braun-Munzinger, P, Cleland, WE, David, G, Dee, J, Dietzsch, O, Duek, E, Fatyga, M, Fox, D, Greene, SV, Hall, JR, Hemmick, TK, Herrmann, N, Hogue, RW, Hong, B, Jayananda, K, Kraus, D, Shiva Kumar, B, Lacasse, R, Lissauer, D, Llope, WJ, Ludlam, T, Majka, R, Makowiecki, D, Mark, SK, McCorkle, S, Mitchell, JT, Muthuswamy, M, O Brien, E, Polychronakos, V, Pruneau, C, Rotondo, FS, Sandweiss, J, Simon-Gillo, J, Sonnadara, U, Stachel, J, Takai, H, Takagui, EM, Throwe, TG, Waters, L, Willis, WJ, Winter, C, Wolf, K, Wolfe, D, Woody, CL, Xu, N, Zhang, Y, Zhang, Z & Zou, Z 1992, 'Electromagnetic dissociation of relativistic Si28 into p+27Al', Physical Review C, vol. 45, no. 5, pp. 2427-2437. https://doi.org/10.1103/PhysRevC.45.2427

@article{40e888956f6d464686f88b57733fd9f0,

title = "Electromagnetic dissociation of relativistic Si28 into p+27Al",

abstract = "We report a direct measurement of the final-state energy spectrum in the electromagnetic dissociation of Si28 into p+ Al27 at an energy of 14.6 GeV/nucleon. The final-state energy is obtained through a calculation of the p-27Al invariant mass in kinematically reconstructed events. The final-state energy spectrum for all targets is peaked near the isovector giant-dipole resonance in Si28 and the dependence of the magnitude of the cross section on target charge confirms that the excitation is largely electromagnetic. By exploiting the expected scaling behavior on target Z and A, the background from nuclear interactions is evaluated and subtracted, leaving a pure electromagnetic dissociation final-state energy distribution. This distribution is well reproduced by simulated events, in which the photon spectrum calculated in the Weisz{\"a}cker-Williams approximation is combined with experimental data on the photonuclear reaction Si28(,p) Al27, and slight differences are observed only at low final-state energy.",

author = "J. Barrette and R. Bellwied and P. Braun-Munzinger and Cleland, {W. E.} and G. David and J. Dee and O. Dietzsch and E. Duek and M. Fatyga and D. Fox and Greene, {S. V.} and Hall, {J. R.} and Hemmick, {T. K.} and N. Herrmann and Hogue, {R. W.} and B. Hong and K. Jayananda and D. Kraus and {Shiva Kumar}, B. and R. Lacasse and D. Lissauer and Llope, {W. J.} and T. Ludlam and R. Majka and D. Makowiecki and Mark, {S. K.} and S. McCorkle and Mitchell, {J. T.} and M. Muthuswamy and {O Brien}, E. and V. Polychronakos and C. Pruneau and Rotondo, {F. S.} and J. Sandweiss and J. Simon-Gillo and U. Sonnadara and J. Stachel and H. Takai and Takagui, {E. M.} and Throwe, {T. G.} and L. Waters and Willis, {W. J.} and C. Winter and K. Wolf and D. Wolfe and Woody, {C. L.} and N. Xu and Y. Zhang and Z. Zhang and Z. Zou",

year = "1992",

doi = "10.1103/PhysRevC.45.2427",

language = "English",

volume = "45",

pages = "2427--2437",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "5",

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TY - JOUR

T1 - Electromagnetic dissociation of relativistic Si28 into p+27Al

AU - Barrette, J.

AU - Bellwied, R.

AU - Braun-Munzinger, P.

AU - Cleland, W. E.

AU - David, G.

AU - Dee, J.

AU - Dietzsch, O.

AU - Duek, E.

AU - Fatyga, M.

AU - Fox, D.

AU - Greene, S. V.

AU - Hall, J. R.

AU - Hemmick, T. K.

AU - Herrmann, N.

AU - Hogue, R. W.

AU - Hong, B.

AU - Jayananda, K.

AU - Kraus, D.

AU - Shiva Kumar, B.

AU - Lacasse, R.

AU - Lissauer, D.

AU - Llope, W. J.

AU - Ludlam, T.

AU - Majka, R.

AU - Makowiecki, D.

AU - Mark, S. K.

AU - McCorkle, S.

AU - Mitchell, J. T.

AU - Muthuswamy, M.

AU - O Brien, E.

AU - Polychronakos, V.

AU - Pruneau, C.

AU - Rotondo, F. S.

AU - Sandweiss, J.

AU - Simon-Gillo, J.

AU - Sonnadara, U.

AU - Stachel, J.

AU - Takai, H.

AU - Takagui, E. M.

AU - Throwe, T. G.

AU - Waters, L.

AU - Willis, W. J.

AU - Winter, C.

AU - Wolf, K.

AU - Wolfe, D.

AU - Woody, C. L.

AU - Xu, N.

AU - Zhang, Y.

AU - Zhang, Z.

AU - Zou, Z.

PY - 1992

Y1 - 1992

N2 - We report a direct measurement of the final-state energy spectrum in the electromagnetic dissociation of Si28 into p+ Al27 at an energy of 14.6 GeV/nucleon. The final-state energy is obtained through a calculation of the p-27Al invariant mass in kinematically reconstructed events. The final-state energy spectrum for all targets is peaked near the isovector giant-dipole resonance in Si28 and the dependence of the magnitude of the cross section on target charge confirms that the excitation is largely electromagnetic. By exploiting the expected scaling behavior on target Z and A, the background from nuclear interactions is evaluated and subtracted, leaving a pure electromagnetic dissociation final-state energy distribution. This distribution is well reproduced by simulated events, in which the photon spectrum calculated in the Weiszäcker-Williams approximation is combined with experimental data on the photonuclear reaction Si28(,p) Al27, and slight differences are observed only at low final-state energy.

AB - We report a direct measurement of the final-state energy spectrum in the electromagnetic dissociation of Si28 into p+ Al27 at an energy of 14.6 GeV/nucleon. The final-state energy is obtained through a calculation of the p-27Al invariant mass in kinematically reconstructed events. The final-state energy spectrum for all targets is peaked near the isovector giant-dipole resonance in Si28 and the dependence of the magnitude of the cross section on target charge confirms that the excitation is largely electromagnetic. By exploiting the expected scaling behavior on target Z and A, the background from nuclear interactions is evaluated and subtracted, leaving a pure electromagnetic dissociation final-state energy distribution. This distribution is well reproduced by simulated events, in which the photon spectrum calculated in the Weiszäcker-Williams approximation is combined with experimental data on the photonuclear reaction Si28(,p) Al27, and slight differences are observed only at low final-state energy.

UR - http://www.scopus.com/inward/record.url?scp=0039100411&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.45.2427

DO - 10.1103/PhysRevC.45.2427

M3 - Article

AN - SCOPUS:0039100411

SN - 0556-2813

VL - 45

SP - 2427

EP - 2437

JO - Physical Review C

JF - Physical Review C

IS - 5

ER -

Electromagnetic dissociation of relativistic Si28 into p+27Al

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