Temperatures of exploding nuclei

被引：84

作者：

Serfling, V ^{[1
]}

Schwarz, C

Bassini, R

Begemann-Blaich, M

Fritz, S

Gaff, SJ

Gross, C

Imme, G

Iori, I

Kleinevoss, U

Kunde, GJ

Kunze, WD

Lynen, U

Maddalena, V

Mahi, M

Mohlenkamp, T

Moroni, A

Muller, WFJ

Nociforo, C

Ocker, B

Odeh, T

Petruzzelli, F

Pochodzalla, J

Raciti, G

Riccobene, G

Romano, FP

Saija, A

Schnittker, M

Schuttauf, A

Seidel, W

Sfienti, C

Trautmann, W

Trzcinski, A

Verde, G

Worner, A

Xi, HF

Zwieglinski, B

机构：

[1] Gesell Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[2] Univ Milan, Ist Sci Fis, I-20133 Milan, Italy

[3] Ist Nazl Fis Nucl, I-20133 Milan, Italy

[4] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[5] Michigan State Univ, Natl Supercond Cyclotron Lab, E Lansing, MI 48824 USA

[6] Univ Catania, I-95129 Catania, Italy

[7] Ist Nazl Fis Nucl, I-95129 Catania, Italy

[8] Forschungszentrum Rossendorf EV, D-01314 Dresden, Germany

[9] Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

[10] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[11] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.80.3928

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Breakup temperatures in central collisions of Au-197 + Au-197 at bombarding energies E/A = 50 to 200 MeV were determined with two methods. Isotope temperatures, deduced from double ratios of hydrogen, helium, and lithium isotopic yields, increase monotonically with bombarding energy from 5 to 12 MeV, in qualitative agreement with a scenario of chemical freeze-out after adiabatic expansion. Excited-state temperatures, derived from yield ratios of states in He-4, Li-5.6, and Be-8, are about 5 MeV, independent of the projectile energy, and seem to reflect the internal temperature of fragments at their final separation from the system.

引用

页码：3928 / 3931

页数：4

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