2010 Fiscal Year Final Research Report
Theoretical investigation of the standard model through electric dipole moment
| Project/Area Number |
20540250
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Saitama University |
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Principal Investigator |
YOSHINAGA Naotaka Saitama University, 理工学研究科, 教授 (00192427)
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| Co-Investigator(Kenkyū-buntansha) |
HIGASHIYAMA Koji 千葉工業大学, 工学部, 助教 (60433679)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 原子核構造 / 中重核 / 殻模型 / 核子対殻模型 / 生成座標法 / シッフモーメント / 電気双極子モーメント |
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| Research Abstract |
We studied the nuclear structure and nuclear Schiff moments and obtained the following results. (1) We performed shell-model calculations for neutron-rich Se, As, Ge, and Ga isotopes, and compared the calculated energy levels and electromagnetic transitions with the experimental data. Through the analysis of the shell model results, it is confirmed that the spin alignment of two neutrons in the 0g9/2 orbital becomes apparent at high spins. (2) We developed a new algorithm for generator coordinate method calculations in order to investigate the structure in transitional nuclei. The application of this model to the even-even Se and Ge nuclei indicated the importance of triaxial deformation in the mass 80 region. (3) Nuclear Schiff moments for the ground states around the mass 130 arising from the nucleon intrinsic EDM are calculated in terms of the nuclear shell model. We estimated the upper limit for the EDM of neutral 129Xe atom using the Schiff moment.
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