Disappearance of flow and the in-medium nucleon-nucleon cross section for 64Zn+27Al collisions at intermediate energies

Zhi Yong He; J. C. Angélique; A. Auger; G. Bizard; R. Brou; A. Buta; C. Cabot; E. Crema; D. Cussol; Guang Xi Dai; Y. El Masri; Ph Eudes; M. Gonin; K. Hagel; Gen Ming Jin; A. Kerambrum; C. Lebrun; Yu Gang Ma; A. Péghaire; J. Péter; R. Popescu; R. Régimbart; E. Rosato; F. Saint-Laurent; Wen Qing Shen; J. C. Steckmeyer; B. Tamain; E. Vient; R. Wada; Feng Shou Zhang

doi:10.1016/0375-9474(95)00486-6

Disappearance of flow and the in-medium nucleon-nucleon cross section for ⁶⁴Zn+²⁷Al collisions at intermediate energies

Zhi Yong He
, J. C. Angélique
, A. Auger
, G. Bizard
, R. Brou
, A. Buta
, C. Cabot
, E. Crema
, D. Cussol
, Guang Xi Dai
, Y. El Masri
, Ph Eudes
, M. Gonin
, K. Hagel
, Gen Ming Jin
, A. Kerambrum
, C. Lebrun
, Yu Gang Ma
, A. Péghaire
, J. Péter

R. Popescu, R. Régimbart, E. Rosato, F. Saint-Laurent, Wen Qing Shen, J. C. Steckmeyer, B. Tamain, E. Vient, R. Wada, Feng Shou Zhang

Normandie Université
Institute of Modern Physics Chinese Academy of Sciences
GANIL Grand Accelerateur National d'Ions Lourds
IFA
University of Louvain
SUBATECH
Cyclotron Institute
Chinese Academy of Sciences
University of Naples Federico II

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

Light charged particles emitted from the reactions ⁶⁴Zn+²⁷Al at beam energies 49, 57, 69 and 79 MeV/u have been measured with a 4π multidetector array. The collective transverse momentum in the reaction plane (in-plane flow) is observed to vary strongly with the impact parameter and the emitted fragments. The flow parameter decreases monotonically from 49 to 79 MeV/u and falls to zero at a beam energy about 79 MeV/u in central collisions. This energy of vanishing flow increases with impact parameter and may be the same for different fragments. The disappearance of flow is also studied with the Boltzmann-Uehling-Uhlenbeck equation and it is demonstrated that the flow parameter and E_VF are very sensitive to the in-medium cross section σ_NN and weakly sensitive to the nuclear compressibility in central collisions. Comparisons with experimental data indicate that σ_NN is around 35 to 45 mb in central collisions.

langue originale	Anglais
Pages (de - à)	248-262
Nombre de pages	15
journal	Nuclear Physics A
Volume	598
Numéro de publication	2
Les DOIs	https://doi.org/10.1016/0375-9474(95)00486-6
état	Publié - 26 févr. 1996
Modification externe	Oui

Accès au document

10.1016/0375-9474(95)00486-6

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Contient cette citation

He, Z. Y., Angélique, J. C., Auger, A., Bizard, G., Brou, R., Buta, A., Cabot, C., Crema, E., Cussol, D., Dai, G. X., El Masri, Y., Eudes, P., Gonin, M., Hagel, K., Jin, G. M., Kerambrum, A., Lebrun, C., Ma, Y. G., Péghaire, A., ... Zhang, F. S. (1996). Disappearance of flow and the in-medium nucleon-nucleon cross section for ⁶⁴Zn+²⁷Al collisions at intermediate energies. Nuclear Physics A, 598(2), 248-262. https://doi.org/10.1016/0375-9474(95)00486-6

@article{5e5917d86b244dc38d8cbc7cc9412829,

title = "Disappearance of flow and the in-medium nucleon-nucleon cross section for 64Zn+27Al collisions at intermediate energies",

abstract = "Light charged particles emitted from the reactions 64Zn+27Al at beam energies 49, 57, 69 and 79 MeV/u have been measured with a 4π multidetector array. The collective transverse momentum in the reaction plane (in-plane flow) is observed to vary strongly with the impact parameter and the emitted fragments. The flow parameter decreases monotonically from 49 to 79 MeV/u and falls to zero at a beam energy about 79 MeV/u in central collisions. This energy of vanishing flow increases with impact parameter and may be the same for different fragments. The disappearance of flow is also studied with the Boltzmann-Uehling-Uhlenbeck equation and it is demonstrated that the flow parameter and EVF are very sensitive to the in-medium cross section σNN and weakly sensitive to the nuclear compressibility in central collisions. Comparisons with experimental data indicate that σNN is around 35 to 45 mb in central collisions.",

author = "He, \{Zhi Yong\} and Ang{\'e}lique, \{J. C.\} and A. Auger and G. Bizard and R. Brou and A. Buta and C. Cabot and E. Crema and D. Cussol and Dai, \{Guang Xi\} and \{El Masri\}, Y. and Ph Eudes and M. Gonin and K. Hagel and Jin, \{Gen Ming\} and A. Kerambrum and C. Lebrun and Ma, \{Yu Gang\} and A. P{\'e}ghaire and J. P{\'e}ter and R. Popescu and R. R{\'e}gimbart and E. Rosato and F. Saint-Laurent and Shen, \{Wen Qing\} and Steckmeyer, \{J. C.\} and B. Tamain and E. Vient and R. Wada and Zhang, \{Feng Shou\}",

year = "1996",

month = feb,

day = "26",

doi = "10.1016/0375-9474(95)00486-6",

language = "English",

volume = "598",

pages = "248--262",

journal = "Nuclear Physics A",

issn = "0375-9474",

number = "2",

}

He, ZY, Angélique, JC, Auger, A, Bizard, G, Brou, R, Buta, A, Cabot, C, Crema, E, Cussol, D, Dai, GX, El Masri, Y, Eudes, P, Gonin, M, Hagel, K, Jin, GM, Kerambrum, A, Lebrun, C, Ma, YG, Péghaire, A, Péter, J, Popescu, R, Régimbart, R, Rosato, E, Saint-Laurent, F, Shen, WQ, Steckmeyer, JC, Tamain, B, Vient, E, Wada, R & Zhang, FS 1996, 'Disappearance of flow and the in-medium nucleon-nucleon cross section for ⁶⁴Zn+²⁷Al collisions at intermediate energies', Nuclear Physics A, VOL. 598, Numéro 2, p. 248-262. https://doi.org/10.1016/0375-9474(95)00486-6

TY - JOUR

T1 - Disappearance of flow and the in-medium nucleon-nucleon cross section for 64Zn+27Al collisions at intermediate energies

AU - He, Zhi Yong

AU - Angélique, J. C.

AU - Auger, A.

AU - Bizard, G.

AU - Brou, R.

AU - Buta, A.

AU - Cabot, C.

AU - Crema, E.

AU - Cussol, D.

AU - Dai, Guang Xi

AU - El Masri, Y.

AU - Eudes, Ph

AU - Gonin, M.

AU - Hagel, K.

AU - Jin, Gen Ming

AU - Kerambrum, A.

AU - Lebrun, C.

AU - Ma, Yu Gang

AU - Péghaire, A.

AU - Péter, J.

AU - Popescu, R.

AU - Régimbart, R.

AU - Rosato, E.

AU - Saint-Laurent, F.

AU - Shen, Wen Qing

AU - Steckmeyer, J. C.

AU - Tamain, B.

AU - Vient, E.

AU - Wada, R.

AU - Zhang, Feng Shou

PY - 1996/2/26

Y1 - 1996/2/26

N2 - Light charged particles emitted from the reactions 64Zn+27Al at beam energies 49, 57, 69 and 79 MeV/u have been measured with a 4π multidetector array. The collective transverse momentum in the reaction plane (in-plane flow) is observed to vary strongly with the impact parameter and the emitted fragments. The flow parameter decreases monotonically from 49 to 79 MeV/u and falls to zero at a beam energy about 79 MeV/u in central collisions. This energy of vanishing flow increases with impact parameter and may be the same for different fragments. The disappearance of flow is also studied with the Boltzmann-Uehling-Uhlenbeck equation and it is demonstrated that the flow parameter and EVF are very sensitive to the in-medium cross section σNN and weakly sensitive to the nuclear compressibility in central collisions. Comparisons with experimental data indicate that σNN is around 35 to 45 mb in central collisions.

AB - Light charged particles emitted from the reactions 64Zn+27Al at beam energies 49, 57, 69 and 79 MeV/u have been measured with a 4π multidetector array. The collective transverse momentum in the reaction plane (in-plane flow) is observed to vary strongly with the impact parameter and the emitted fragments. The flow parameter decreases monotonically from 49 to 79 MeV/u and falls to zero at a beam energy about 79 MeV/u in central collisions. This energy of vanishing flow increases with impact parameter and may be the same for different fragments. The disappearance of flow is also studied with the Boltzmann-Uehling-Uhlenbeck equation and it is demonstrated that the flow parameter and EVF are very sensitive to the in-medium cross section σNN and weakly sensitive to the nuclear compressibility in central collisions. Comparisons with experimental data indicate that σNN is around 35 to 45 mb in central collisions.

UR - https://www.scopus.com/pages/publications/16144366624

U2 - 10.1016/0375-9474(95)00486-6

DO - 10.1016/0375-9474(95)00486-6

M3 - Article

AN - SCOPUS:16144366624

SN - 0375-9474

VL - 598

SP - 248

EP - 262

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 2