Mass measurements near the $r$-process path using the Canadian Penning Trap mass spectrometer
Mass measurements near the $r$-process path using the Canadian Penning Trap mass spectrometer
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DOI：
10.1103/physrevc.85.045805
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发表时间：
2012-03
影响因子：
3.1
通讯作者：
J. V. Schelt;J. V. Schelt;D. Lascar;G. Savard;G. Savard;J. Clark;S. Caldwell;S. Caldwell;A. Chaudhuri;A. Chaudhuri;J. Fallis;J. Fallis;J. Greene;A. Levand;Gang Li;Gang Li;K. Sharma;M. Sternberg;M. Sternberg;T. Sun;B. Zabransky
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文献类型：
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作者：
J. V. Schelt;J. V. Schelt;D. Lascar;G. Savard;G. Savard;J. Clark;S. Caldwell;S. Caldwell;A. Chaudhuri;A. Chaudhuri;J. Fallis;J. Fallis;J. Greene;A. Levand;Gang Li;Gang Li;K. Sharma;M. Sternberg;M. Sternberg;T. Sun;B. Zabransky
用加拿大阿贡国家实验室的Penning阱质谱计测量了Z = 51 ~ 64的40个丰中子核素的质量，平均精度为$\delta m/m= 10^{-7}$。在氦气捕集器中对$^{252}$Cf自发裂变源的裂变碎片的测量接近天体物理过程的预测路径。存在重叠的地方，这个数据集在很大程度上是与以前的测量从潘宁陷阱，储存环，反应能量学一致，但大的系统偏差是明显的$\beta$-端点测量。从2003年的原子质量评估高达400千电子伏的质量过剩的差异，以及各种质量模型的系统不一致。
The masses of 40 neutron-rich nuclides from Z = 51 to 64 were measured at an average precision of $\delta m/m= 10^{-7}$ using the Canadian Penning Trap mass spectrometer at Argonne National Laboratory. The measurements, of fission fragments from a $^{252}$Cf spontaneous fission source in a helium gas catcher, approach the predicted path of the astrophysical $r$ process. Where overlap exists, this data set is largely consistent with previous measurements from Penning traps, storage rings, and reaction energetics, but large systematic deviations are apparent in $\beta$-endpoint measurements. Differences in mass excess from the 2003 Atomic Mass Evaluation of up to 400 keV are seen, as well as systematic disagreement with various mass models.