分类: 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间: 2017-11-10
摘要: We take the JUNO experiment as an example to explore nuclearites in the future large liquid scintillator detector. Comparing to the previous calculations, the visible energy of nuclearites across the liquid scintillator will be reestimated for the liquid scintillator based detector. Then the JUNO sensitivities to the nuclearite flux are presented. It is found that the JUNO projected sensitivities can be better than 7.7×10−17cm−2s−1sr−1 for the nuclearite mass 1015 GeV ≤ M ≤ 1024 GeV and initial velocity 10−4 ≤ β0 ≤ 10−1 with a 20 year running. Note that the JUNO will give the most stringent limits for downgoing nuclearites with 1.6 × 1013 GeV ≤ M ≤ 4.0 × 1015 GeV and a typical galactic velocity β0 = 10−3.
分类: 物理学 >> 核物理学 提交时间: 2017-07-30
摘要: The intrinsic nuclear shapes deviating from a sphere not only man- ifest themselves in nuclear collective states but also play impor- tant roles in determining nuclear potential energy surfaces (PES’s) and fission barriers. In order to describe microscopically and self- consistently nuclear shapes and PES’s with as many shape degrees of freedom as possible included, we developed multidimensionally- constrained covariant density functional theories (MDC-CDFTs). In MDC-CDFTs, the axial symmetry and the reflection symmetry are both broken and all deformations characterized by βλμ with even μ are considered. We have used the MDC-CDFTs to study PES’s and fission barriers of actinides, the non-axial octupole Y32 correla- tions in N = 150 isotones and shapes of hypernuclei. In this Review we will give briefly the formalism of MDC-CDFTs and present the applications to normal nuclei.