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Breakup conditions of projectile spectators from dynamical observables
Begemann-Blaich, M; Lindenstruth, V; Pochodzalla, J; Adloff, JC; Bouissou, P; Hubele, J; Imme, G; Iori, I; Kreutz, P; Kunde, GJ; Leray, S; Liu, Z; Lynen, U; Meijer, RJ; Milkau, U; Moroni, A; Muller, WFJ; Ngo, C; Ogilvie, CA; Raciti, G; Rudolf, G; Sann, H; Schnittker, M; Schuttauf, A; Seidel, W; Stuttge, L; Trautmann, W; Tucholski, A
1998
发表期刊PHYSICAL REVIEW C
卷号58期号:3页码:1639-1655
通讯作者Gesell Schwerionenforsch GmbH, D-64220 Darmstadt, Germany ; MPI Kernphys Heidelberg, D-69029 Heidelberg, Germany ; Ctr Rech Nucl, F-67037 Strasbourg, France ; CENS, Natl Saturne Lab, F-91191 Gif Sur Yvette, France ; Univ Catania, Dipartmento Fis, I-95129 Catania, Italy ; Ist Nazl Fis Nucl, I-95129 Catania, Italy ; Univ Milan, Ist Sci Fis, I-20133 Milan, Italy ; Ist Nazl Fis Nucl, I-20133 Milan, Italy ; Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany ; Forschungszentrum Rossendorf, D-01314 Dresden, Germany ; Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA ; Yale Univ, Dept Phys, New Haven, CT 06512 USA ; Inst High Energy Phys, Beijing 100039, Peoples R China ; MIT, Dept Phys, Cambridge, MA 02139 USA
摘要Momenta and masses of heavy projectile fragments (Z greater than or equal to 8), produced in collisions of (197)AU With C, Al, Cu, and Pb targets at EIA = 600 MeV, were determined with the ALADIN magnetic spectrometer at SIS. Using this information, an analysis of kinematic correlations between the two and three heaviest projectile fragments in their rest frame was performed. The sensitivity of these correlations to the conditions at breakup was verified within the schematic sos model. For a quantitative investigation, the data were compared to calculations with statistical multifragmentation models and to classical three-body calculations. With classical trajectory calculations, where the charges and masses of the fragments are taken from a Monte Carlo sampling of the experimental events, the dynamical observables can be reproduced. The deduced breakup parameters, however, differ considerably from those assumed in the statistical multifragmentation models which describe the charge correlations. If, on the other hand, the analysis of kinematic and charge correlations is performed for events with two and three heavy fragments produced by statistical multifragmentation codes, good agreement with the data is found with the exception that the fluctuation widths of the intrinsic fragment energies are significantly underestimated. A new Version of the multifragmentation code MCFRAG was therefore used to investigate the potential role of angular momentum at the breakup stage. If a mean angular momentum of 0.75(h)over bar>/nucleon is added to the system, the energy fluctuations can be reproduced, but at the same time the charge partitions are modified and deviate from the data.
文章类型Article
学科领域Physics
研究领域[WOS]Physics
DOI10.1103/PhysRevC.58.1639
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语种英语
WOS类目Physics, Nuclear
WOS记录号WOS:000075896700031
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被引频次:13[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239447
专题实验物理中心
作者单位中国科学院高能物理研究所
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Begemann-Blaich, M,Lindenstruth, V,Pochodzalla, J,et al. Breakup conditions of projectile spectators from dynamical observables[J]. PHYSICAL REVIEW C,1998,58(3):1639-1655.
APA Begemann-Blaich, M.,Lindenstruth, V.,Pochodzalla, J.,Adloff, JC.,Bouissou, P.,...&Tucholski, A.(1998).Breakup conditions of projectile spectators from dynamical observables.PHYSICAL REVIEW C,58(3),1639-1655.
MLA Begemann-Blaich, M,et al."Breakup conditions of projectile spectators from dynamical observables".PHYSICAL REVIEW C 58.3(1998):1639-1655.
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