136Sn and three-body forces

Pramana

S Sarkar¹  M Saha Sarkar1² 

[1] Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, India$$;Saha Institute of Nuclear Physics, Bidhan Nagar, Kolkata 700 064, India$$

关键词: Shell model;    neutron-rich nuclei;    nuclear structure;    𝐵(𝐸2) values;    90 ≤ A ≤ 149.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

New experimental data on 2+ energies of 136,138Sn confirm the trend of lower 2+ excitation energies of even–even tin isotopes with 𝑁 > 82 compared to those with N < 82. However, none of the theoretical predictions using both realistic and empirical interactions can reproduce experimental data on excitation energies as well as the transition probabilities (𝐵(𝐸2; 6+ → 4+)) of these nuclei, simultaneously, apart from the ones whose matrix elements have been changed empirically to produce mixed seniority states by weakening the pairing. We have shown that the experimental result also shows good agreement with the theory in which three-body forces have been included in a realistic interaction. The new theoretical results on transition probabilities are discussed to identify the experimental quantities which will clearly distinguish between different views.

【 授权许可】

Unknown