Accurate calculations of nuclear matrix elements for neutrinoless double beta decay

2016 Fiscal Year Final Research Report

• Project/Area Number: 25400267
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Chiba Institute of Technology
• Principal Investigator: HIGASHIYAMA Koji 千葉工業大学, 創造工学部, 准教授 (60433679)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 原子核構造 / 中重核 / 殻模型 / 核子対殻模型 / 二重ベータ崩壊

Outline of Final Research Achievements

Low-lying states for even-even, odd-mass, and doubly odd nuclei around masses 80, 100 and 130 are systematically investigated using a shell model. Energy levels of the low-lying collective states for even-even isotopes are reproduced very well along with electromagnetic transitions. For odd-mass and doubly odd nuclei, complicated level schemes and electromagnetic moments are in excellent agreement with the experimental data. Using wave functions obtained in these calculations, the nuclear matrix elements for the neutrinoless double beta decay are estimated. Our calculations give a few times smaller nuclear matrix elements than those obtained by other theoretical methods.

Free Research Field

原子核理論物理学