用JYFLTRAP和SHIPTRAP测量rp过程和nu p过程轨道附近的质量
Mass measurements in the vicinity of the rp-process and the nu p-process paths with JYFLTRAP and SHIPTRAP
摘要：
位于JYFL/Jyväskylä的Penning阱装置JYFLTRAP和位于GSI/Darmstadt的SHIPTRAP已经确定了接近天体物理rp和nu p过程路径的非常缺中子核素的质量。从钇（Z = 39）到钯（Z = 46）的同位素都是在重离子熔融蒸发反应中产生的。总共研究了21种核素，其中近一半的质量值是首次通过实验确定的：88 Tc，90- 92 Ru，92- 94 Rh和94，95 Pd。对于95 Pdm，（21/2^+）高自旋态，进行了第一次直接质量测定。得到了典型$δm / m = 5 \times 10^{-8}$的相对质量不确定度。新的质量值的影响进行了研究，在nu p过程核合成计算。将得到的反应流和最终丰度与2003年原子质量评估的数据进行比较。
英文摘要：
The masses of very neutron-deficient nuclides close to the astrophysical rp- and nu p-process paths have been determined with the Penning trap facilities JYFLTRAP at JYFL/Jyväskylä and SHIPTRAP at GSI/Darmstadt. Isotopes from yttrium (Z = 39) to palladium (Z = 46) have been produced in heavy-ion fusion-evaporation reactions. In total 21 nuclides were studied and almost half of the mass values were experimentally determined for the first time: 88Tc, 90-92Ru, 92-94Rh, and 94,95Pd. For the 95Pdm, (21/2^+) high-spin state, a first direct mass determination was performed. Relative mass uncertainties of typically $δm / m = 5 \times 10^{-8}$ were obtained. The impact of the new mass values has been studied in nu p-process nucleosynthesis calculations. The resulting reaction flow and the final abundances are compared to those obtained with the data of the Atomic Mass Evaluation 2003.
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