Onset of nuclear matter expansion in Au+Au collisions

P. Crochet, F. Rami, A. Gobbi, R. Donà, J. P. Coffin, P. Fintz, G. Guillaume, F. Jundt, C. Kuhn, C. Roy, B. De Schauenburg, L. Tizniti, P. Wagner, J. R. Alard, V. Amouroux, A. Andronic, Z. Basrak, N. Bastid, I. Belyaev, D. BestJ. Biegansky, A. Buta, R. Čaplar, N. Cindro, P. Dupieux, M. Dželalija, Z. G. Fan, Z. Fodor, L. Fraysse, R. P. Freifelder, N. Herrmann, K. D. Hildenbrand, Byungsik Hong, S. C. Jeong, J. Kecskemeti, M. Kirejczyk, P. Koncz, M. Korolija, R. Kotte, A. Lebedev, Y. Leifels, V. Manko, D. Moisa, J. Mösner, W. Neubert, D. Pelte, M. Petrovici, C. Pinkenburg, P. Pras, V. Ramillien, W. Reisdorf, J. L. Ritman, A. G. Sadchikov, D. Schüll, Z. Seres, B. Sikora, V. Simion, K. Siwek-Wilczyńska, U. Sodan, K. M. Teh, M. Trzaska, M. Vasiliev, G. S. Wang, J. P. Wessels, T. Wienold, K. Wisniewski, D. Wohlfarth, A. Zhilin

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident energies ranging from 100AMeV to 800AMeV. The threshold energies, corresponding to the onset of sideward-flow (balance energy) and squeeze-out effect (transition energy), are extracted from extrapolations of these excitation functions toward lower beam energies for charged products with Z ≥ 2. The transition energy is found to be larger than the balance energy. The impact parameter dependence of both balance and transition energies, when extrapolated to central collisions, suggests comparable although slightly higher values than the threshold energy for the radial flow. The relevant parameter seems to be the energy deposited into the system in order to overcome the attractive nuclear forces.

Original languageEnglish
Pages (from-to)755-772
Number of pages18
JournalNuclear Physics A
Volume624
Issue number4
Publication statusPublished - 1997 Oct 20
Externally publishedYes

Fingerprint

collisions
expansion
energy
radial flow
thresholds
excitation
extrapolation
detectors
products

Keywords

  • Balance energy
  • Heavy ion collisions
  • Nuclear matter expansion
  • Radial flow
  • Sideward-flow
  • Squeeze-out
  • Transition energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Crochet, P., Rami, F., Gobbi, A., Donà, R., Coffin, J. P., Fintz, P., ... Zhilin, A. (1997). Onset of nuclear matter expansion in Au+Au collisions. Nuclear Physics A, 624(4), 755-772.

Onset of nuclear matter expansion in Au+Au collisions. / Crochet, P.; Rami, F.; Gobbi, A.; Donà, R.; Coffin, J. P.; Fintz, P.; Guillaume, G.; Jundt, F.; Kuhn, C.; Roy, C.; De Schauenburg, B.; Tizniti, L.; Wagner, P.; Alard, J. R.; Amouroux, V.; Andronic, A.; Basrak, Z.; Bastid, N.; Belyaev, I.; Best, D.; Biegansky, J.; Buta, A.; Čaplar, R.; Cindro, N.; Dupieux, P.; Dželalija, M.; Fan, Z. G.; Fodor, Z.; Fraysse, L.; Freifelder, R. P.; Herrmann, N.; Hildenbrand, K. D.; Hong, Byungsik; Jeong, S. C.; Kecskemeti, J.; Kirejczyk, M.; Koncz, P.; Korolija, M.; Kotte, R.; Lebedev, A.; Leifels, Y.; Manko, V.; Moisa, D.; Mösner, J.; Neubert, W.; Pelte, D.; Petrovici, M.; Pinkenburg, C.; Pras, P.; Ramillien, V.; Reisdorf, W.; Ritman, J. L.; Sadchikov, A. G.; Schüll, D.; Seres, Z.; Sikora, B.; Simion, V.; Siwek-Wilczyńska, K.; Sodan, U.; Teh, K. M.; Trzaska, M.; Vasiliev, M.; Wang, G. S.; Wessels, J. P.; Wienold, T.; Wisniewski, K.; Wohlfarth, D.; Zhilin, A.

In: Nuclear Physics A, Vol. 624, No. 4, 20.10.1997, p. 755-772.

Research output: Contribution to journalArticle

Crochet, P, Rami, F, Gobbi, A, Donà, R, Coffin, JP, Fintz, P, Guillaume, G, Jundt, F, Kuhn, C, Roy, C, De Schauenburg, B, Tizniti, L, Wagner, P, Alard, JR, Amouroux, V, Andronic, A, Basrak, Z, Bastid, N, Belyaev, I, Best, D, Biegansky, J, Buta, A, Čaplar, R, Cindro, N, Dupieux, P, Dželalija, M, Fan, ZG, Fodor, Z, Fraysse, L, Freifelder, RP, Herrmann, N, Hildenbrand, KD, Hong, B, Jeong, SC, Kecskemeti, J, Kirejczyk, M, Koncz, P, Korolija, M, Kotte, R, Lebedev, A, Leifels, Y, Manko, V, Moisa, D, Mösner, J, Neubert, W, Pelte, D, Petrovici, M, Pinkenburg, C, Pras, P, Ramillien, V, Reisdorf, W, Ritman, JL, Sadchikov, AG, Schüll, D, Seres, Z, Sikora, B, Simion, V, Siwek-Wilczyńska, K, Sodan, U, Teh, KM, Trzaska, M, Vasiliev, M, Wang, GS, Wessels, JP, Wienold, T, Wisniewski, K, Wohlfarth, D & Zhilin, A 1997, 'Onset of nuclear matter expansion in Au+Au collisions', Nuclear Physics A, vol. 624, no. 4, pp. 755-772.
Crochet P, Rami F, Gobbi A, Donà R, Coffin JP, Fintz P et al. Onset of nuclear matter expansion in Au+Au collisions. Nuclear Physics A. 1997 Oct 20;624(4):755-772.
Crochet, P. ; Rami, F. ; Gobbi, A. ; Donà, R. ; Coffin, J. P. ; Fintz, P. ; Guillaume, G. ; Jundt, F. ; Kuhn, C. ; Roy, C. ; De Schauenburg, B. ; Tizniti, L. ; Wagner, P. ; Alard, J. R. ; Amouroux, V. ; Andronic, A. ; Basrak, Z. ; Bastid, N. ; Belyaev, I. ; Best, D. ; Biegansky, J. ; Buta, A. ; Čaplar, R. ; Cindro, N. ; Dupieux, P. ; Dželalija, M. ; Fan, Z. G. ; Fodor, Z. ; Fraysse, L. ; Freifelder, R. P. ; Herrmann, N. ; Hildenbrand, K. D. ; Hong, Byungsik ; Jeong, S. C. ; Kecskemeti, J. ; Kirejczyk, M. ; Koncz, P. ; Korolija, M. ; Kotte, R. ; Lebedev, A. ; Leifels, Y. ; Manko, V. ; Moisa, D. ; Mösner, J. ; Neubert, W. ; Pelte, D. ; Petrovici, M. ; Pinkenburg, C. ; Pras, P. ; Ramillien, V. ; Reisdorf, W. ; Ritman, J. L. ; Sadchikov, A. G. ; Schüll, D. ; Seres, Z. ; Sikora, B. ; Simion, V. ; Siwek-Wilczyńska, K. ; Sodan, U. ; Teh, K. M. ; Trzaska, M. ; Vasiliev, M. ; Wang, G. S. ; Wessels, J. P. ; Wienold, T. ; Wisniewski, K. ; Wohlfarth, D. ; Zhilin, A. / Onset of nuclear matter expansion in Au+Au collisions. In: Nuclear Physics A. 1997 ; Vol. 624, No. 4. pp. 755-772.
@article{995dd2386f1b422b8339a973a3b204fc,
title = "Onset of nuclear matter expansion in Au+Au collisions",
abstract = "Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident energies ranging from 100AMeV to 800AMeV. The threshold energies, corresponding to the onset of sideward-flow (balance energy) and squeeze-out effect (transition energy), are extracted from extrapolations of these excitation functions toward lower beam energies for charged products with Z ≥ 2. The transition energy is found to be larger than the balance energy. The impact parameter dependence of both balance and transition energies, when extrapolated to central collisions, suggests comparable although slightly higher values than the threshold energy for the radial flow. The relevant parameter seems to be the energy deposited into the system in order to overcome the attractive nuclear forces.",
keywords = "Balance energy, Heavy ion collisions, Nuclear matter expansion, Radial flow, Sideward-flow, Squeeze-out, Transition energy",
author = "P. Crochet and F. Rami and A. Gobbi and R. Don{\`a} and Coffin, {J. P.} and P. Fintz and G. Guillaume and F. Jundt and C. Kuhn and C. Roy and {De Schauenburg}, B. and L. Tizniti and P. Wagner and Alard, {J. R.} and V. Amouroux and A. Andronic and Z. Basrak and N. Bastid and I. Belyaev and D. Best and J. Biegansky and A. Buta and R. Čaplar and N. Cindro and P. Dupieux and M. Dželalija and Fan, {Z. G.} and Z. Fodor and L. Fraysse and Freifelder, {R. P.} and N. Herrmann and Hildenbrand, {K. D.} and Byungsik Hong and Jeong, {S. C.} and J. Kecskemeti and M. Kirejczyk and P. Koncz and M. Korolija and R. Kotte and A. Lebedev and Y. Leifels and V. Manko and D. Moisa and J. M{\"o}sner and W. Neubert and D. Pelte and M. Petrovici and C. Pinkenburg and P. Pras and V. Ramillien and W. Reisdorf and Ritman, {J. L.} and Sadchikov, {A. G.} and D. Sch{\"u}ll and Z. Seres and B. Sikora and V. Simion and K. Siwek-Wilczyńska and U. Sodan and Teh, {K. M.} and M. Trzaska and M. Vasiliev and Wang, {G. S.} and Wessels, {J. P.} and T. Wienold and K. Wisniewski and D. Wohlfarth and A. Zhilin",
year = "1997",
month = "10",
day = "20",
language = "English",
volume = "624",
pages = "755--772",
journal = "Nuclear Physics A",
issn = "0375-9474",
publisher = "Elsevier",
number = "4",

}

TY - JOUR

T1 - Onset of nuclear matter expansion in Au+Au collisions

AU - Crochet, P.

AU - Rami, F.

AU - Gobbi, A.

AU - Donà, R.

AU - Coffin, J. P.

AU - Fintz, P.

AU - Guillaume, G.

AU - Jundt, F.

AU - Kuhn, C.

AU - Roy, C.

AU - De Schauenburg, B.

AU - Tizniti, L.

AU - Wagner, P.

AU - Alard, J. R.

AU - Amouroux, V.

AU - Andronic, A.

AU - Basrak, Z.

AU - Bastid, N.

AU - Belyaev, I.

AU - Best, D.

AU - Biegansky, J.

AU - Buta, A.

AU - Čaplar, R.

AU - Cindro, N.

AU - Dupieux, P.

AU - Dželalija, M.

AU - Fan, Z. G.

AU - Fodor, Z.

AU - Fraysse, L.

AU - Freifelder, R. P.

AU - Herrmann, N.

AU - Hildenbrand, K. D.

AU - Hong, Byungsik

AU - Jeong, S. C.

AU - Kecskemeti, J.

AU - Kirejczyk, M.

AU - Koncz, P.

AU - Korolija, M.

AU - Kotte, R.

AU - Lebedev, A.

AU - Leifels, Y.

AU - Manko, V.

AU - Moisa, D.

AU - Mösner, J.

AU - Neubert, W.

AU - Pelte, D.

AU - Petrovici, M.

AU - Pinkenburg, C.

AU - Pras, P.

AU - Ramillien, V.

AU - Reisdorf, W.

AU - Ritman, J. L.

AU - Sadchikov, A. G.

AU - Schüll, D.

AU - Seres, Z.

AU - Sikora, B.

AU - Simion, V.

AU - Siwek-Wilczyńska, K.

AU - Sodan, U.

AU - Teh, K. M.

AU - Trzaska, M.

AU - Vasiliev, M.

AU - Wang, G. S.

AU - Wessels, J. P.

AU - Wienold, T.

AU - Wisniewski, K.

AU - Wohlfarth, D.

AU - Zhilin, A.

PY - 1997/10/20

Y1 - 1997/10/20

N2 - Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident energies ranging from 100AMeV to 800AMeV. The threshold energies, corresponding to the onset of sideward-flow (balance energy) and squeeze-out effect (transition energy), are extracted from extrapolations of these excitation functions toward lower beam energies for charged products with Z ≥ 2. The transition energy is found to be larger than the balance energy. The impact parameter dependence of both balance and transition energies, when extrapolated to central collisions, suggests comparable although slightly higher values than the threshold energy for the radial flow. The relevant parameter seems to be the energy deposited into the system in order to overcome the attractive nuclear forces.

AB - Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident energies ranging from 100AMeV to 800AMeV. The threshold energies, corresponding to the onset of sideward-flow (balance energy) and squeeze-out effect (transition energy), are extracted from extrapolations of these excitation functions toward lower beam energies for charged products with Z ≥ 2. The transition energy is found to be larger than the balance energy. The impact parameter dependence of both balance and transition energies, when extrapolated to central collisions, suggests comparable although slightly higher values than the threshold energy for the radial flow. The relevant parameter seems to be the energy deposited into the system in order to overcome the attractive nuclear forces.

KW - Balance energy

KW - Heavy ion collisions

KW - Nuclear matter expansion

KW - Radial flow

KW - Sideward-flow

KW - Squeeze-out

KW - Transition energy

UR - http://www.scopus.com/inward/record.url?scp=0031580984&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031580984&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031580984

VL - 624

SP - 755

EP - 772

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

IS - 4

ER -