量热曲线的同位素依赖性
Isotopic Dependence of the Caloric Curve
摘要：
本文用SIS的ALADIN前向谱仪研究了相对论能区弹丸碎裂的同位素效应。稳定的放射性Sn和La束的入射能量为600兆电子伏每核子已被用来探索广泛的同位素组成。化学冻结温度被发现是几乎不变的相对于所产生的观众源的A/Z比，与预测的扩展系统。建议解释的化学破碎温度代表的极限温度预测微观模型的后果进行了讨论。
英文摘要：
Isotopic effects in projectile fragmentation at relativistic energies have been studied with the ALADIN forward spectrometer at SIS. Stable and radioactive Sn and La beams with an incident energy of 600 MeV per nucleon have been used in order to explore a wide range of isotopic compositions. Chemical freeze-out temperatures are found to be nearly invariant with respect to the A/Z ratio of the produced spectator sources, consistent with predictions for expanded systems. Consequences for the proposed interpretation of chemical breakup temperatures as representing the limiting temperatures predicted by microscopic models are discussed.
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