弹核碎裂的 N/Z 依赖性
核实验
2009-03-24 v1
摘要
最近在 GSI 实验室利用耦合了 LAND 中子探测器的 ALADiN 前向谱仪进行了一项实验，研究了相对论能量下弹核碎裂的 N/Z 依赖性。除了 124Sn 初级束流外，还使用了由 FRS 碎片分离器提供的 124La 和 107Sn 次级束流，以扩展所产生的旁观者源的同位素组成范围。凭借达到的 \Delta A/A \approx 1.5% 的质量分辨率，原子序数 Z \le 10 的较轻同位素被单独分辨出来。目前对测量到的同位素产额的分析主要集中在同位素标度律及其与冻结-out 时热碎片性质的关系上，以及化学冻结-out 温度的推导上；研究发现这些温度与所研究系统的同位素组成无关。后一结果与有限温度 Hartree-Fock 计算所得的极限温度预测不一致。
引用
@article{arxiv.0711.4462,
title = {N/Z Dependence of Projectile Fragmentation},
author = {W. Trautmann and P. Adrich and T. Aumann and C. O. Bacri and T. Barczyk and R. Bassini and S. Bianchin and C. Boiano and A. S. Botvina and A. Boudard and J. Brzychczyk and A. Chbihi and J. Cibor and B. Czech and M. De Napoli and J. -E. Ducret and H. Emling and J. D. Frankland and M. Hellstroem and D. Henzlova and G. Imme and I. Iori and H. Johansson and K. Kezzar and A. Lafriakh and A. Le Fevre and E. Le Gentil and Y. Leifels and J. Luehning and J. Lukasik and W. G. Lynch and U. Lynen and Z. Majka and M. Mocko and W. F. J. Mueller and A. Mykulyak and H. Orth and A. N. Otte and R. Palit and P. Pawlowski and A. Pullia and G. Raciti and E. Rapisarda and H. Sann and C. Schwarz and C. Sfienti and H. Simon and K. Suemmerer and M. B. Tsang and G. Verde and C. Volant and M. Wallace and H. Weick and J. Wiechula and A. Wieloch and B. Zwieglinski},
journal= {arXiv preprint arXiv:0711.4462},
year = {2009}
}
备注
11 pages, 5 figures, Proceedings of International Workshop on Nuclear Dynamics in Heavy-Ion Reactions and Neutron Stars, Beijing, July 10-14, 2007, to appear in International Journal of Modern Physics E