نویسندگان
دانشگاه فردوسی مشهد
چکیده
در این مطالعه، جفت شدگی بین نوکلئون ظرفیت و ارتعاشات قلب هسته در هسته 208Pb در نظر گرفته شده است. ماتریس هامیلتونی در پایه های ذره-ارتعاش برای هر تراز تشکیل شده است و پس از قطری سازی با ترازهای تجربی برازش شده است. بدین ترتیب مجموعه ای از ترازهای تجربی تصحیح شده بدست آمده که تک ذره ای خالص هستند. نتایج نشان می دهد که گپ انرژی نوترونی و پروتونی به ترتیب به اندازه MeV81/0 و MeV 39/0 در طیف تصحیح شده بزرگتر می شود. سپس، پارامترهای پتانسیل پدیده شناختی Woods-Saxon برای بازتولید این ترازهای تصحیح شده بهینه سازی شده است. نتایج نشان می دهد که ترازهای محاسبه شده با استفاده از پارامترهای جدید پتانسیل WS نسبت به مطالعات گذشته بهترین تطبیق با تجربه را داراست.
کلیدواژه‌ها
عنوان مقاله [English]
Parameterization of Woods-Saxon potential in view of Particle-vibration coupling for 208Pb
نویسندگان [English]
- L Rafat-Motavalli
- S H Miri-Hakimabad
- E Hoseinian-Azghadi
چکیده [English]
In this study, the particle-vibration coupling for nuclei around 208Pb was taken into account. Then, Hamiltonian matrix in the basis of particle vibration eigenvectors was constructed and after matrix Diagonalization, fitting with experimental states was performed. Therefore, a set of pure single particle states was obtained which also called modified experimental levels. The results show that the neutron and proton energy gap were considerably increased to 0.81 MeV and 0.39 MeV in modified spectrum, respectively. The shell model parameters of phenomenological Woods-Saxon (WS) potential was then adjusted to reproduce these modified experimental states. The results showed that, WS potential with the help of new parameters predict the experimental states more precisely.
کلیدواژه‌ها [English]
- Shell model
- 208Pb nuclei
- Particle-vibration coupling
- Single-particle states
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