Role of shell structure in the 2νββ nuclear matrix elements

✍ Scribed by H. Nakada

• Book ID: 104336707
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 231 KB
• Volume: 629
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(97)00731-8

✦ Synopsis

Significance of the nuclear shell structure in the tiff nuclear matrix elements is pointed out. The 2uflfl processes are mainly mediated by the low-lying 1 + states. The shell structure also gives rise to concentration or fragmentation of the 2r, flfl components over intermediate states, depending on nuclide. These roles of the shell structure are numerically confirmed by realistic shell model calculations. Some shell structure effects are suggested for Ouflfl matrix elements; dominance of low-lying intermediate states and nucleus-dependence of their spin-parities.