PROBING THE NUCLEAR LIQUID-GAS PHASE-TRANSITION

被引:701
作者
POCHODZALLA, J
MOHLENKAMP, T
RUBEHN, T
SCHUTTAUF, A
WORNER, A
ZUDE, E
BEGEMANNBLAICH, M
BLAICH, T
EMLING, H
FERRERO, A
GROSS, C
IMME, G
IORI, I
KUNDE, GJ
KUNZE, WD
LINDENSTRUTH, V
LYNEN, U
MORONI, A
MULLER, WFJ
OCKER, B
RACITI, G
SANN, H
SCHWARZ, C
SEIDEL, W
SERFLING, V
STROTH, J
TRAUTMANN, W
TRZCINSKI, A
TUCHOLSKI, A
VERDE, G
ZWIEGLINSKI, B
机构
[1] FORSCHUNGSZENTRUM ROSSENDORF, D-01314 DRESDEN, GERMANY
[2] UNIV FRANKFURT, INST KERNPHYS, D-60486 FRANKFURT, GERMANY
[3] UNIV MAINZ, INST KERNCHEM, D-55099 MAINZ, GERMANY
[4] UNIV MILAN, DIPARTIMENTO FIS, I-20133 MILAN, ITALY
[5] IST NAZL FIS NUCL, I-20133 MILAN, ITALY
[6] UNIV CATANIA, DIPARTMENTO FIS, I-95129 CATANIA, ITALY
[7] IST NAZL FIS NUCL, I-95129 CATANIA, ITALY
[8] SOLTAN INST NUCL STUDIES, PL-00681 WARSAW, POLAND
关键词
D O I
10.1103/PhysRevLett.75.1040
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Fragment distributions resulting from Au + Au collisions at an incident energy of E/A = 600 MeV are studied. From the measured fragment and neutron distributions the mass and the excitation energy of the decaying prefragments were determined. A temperature scale was derived from observed yield ratios of He and Li isotopes. The relation between this isotope temperature and the excitation energy of the system exhibits a behavior which is expected for a phase transition. The nuclear vapor regime takes over at an excitation energy of 10 MeV per nucleon, a temperature of 5 MeV, and may be characterized by a density of 0.15-0.3 normal nuclear density.
引用
收藏
页码:1040 / 1043
页数:4
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