مطالعة عددی نرخ واکنش و شدت گذار B(E2) برای واکنش17O(p,γ)18F در انرژی‌های پایین

آران پور, امیر هومان; خلیلی, حسن; ناهیدی نژاد, شهلا; دالوند, معصومه

doi:10.22055/jrmbs.2024.18898

مطالعة عددی نرخ واکنش و شدت گذار B(E2) برای واکنش17O(p,γ)18F در انرژی‌های پایین

نوع مقاله : مقاله پژوهشی کامل

نویسندگان

گروه فیزیک، دانشکده علوم، دانشگاه اراک،38156 -8-8349، اراک، ایران

10.22055/jrmbs.2024.18898

چکیده

مطالعة عامل اخترفیزیکی S، یکی از روش‌های تجزیه و تحلیل واکنش‌های گیراندازی تابشی پروتونی در چارچوب‌ نظری برای دماهای پایین می‌باشد. در این کار با استفاده از مدل پتانسیل وودز-ساکسون به‌مطالعة عددی واکنش گیراندازی تابشی پروتونی توسط اکسیژن۱۷ پرداخته‌ شده است. ابتدا عامل اخترفیزیکیS برای واکنش¹⁷O(p,γ)¹⁸F در انرژی‌های کم محاسبه شد و سپس با استفاده از عامل اخترفیزیکیS نرخ واکنش به‌دست آورده شد. همچنین در این کار شدت گذار چهارقطبی الکتریکی B[E₂] از حالت‌های برانگیخته هسته ¹⁸F بررسی شده است. مشخص شد که B[E₂] به انرژی و اسپین حالت‌های برانگیخته وابسته می‌باشد. نتایج به‌دست آمده در خصوص عامل اخترفیزیکیS، نرخ واکنش و شدت گذار در محدودة انرژی keV 200-500 با داده‌های تجربی و سایر مدل‌های نظری مقایسه و مطابقت خوبی داشتند. همچنین عامل اخترفیزیکی S در انرژی صفر با روش برون‌یابی برای تراز ⁺(2/5) محاسبه و مقدار keV b 8_/4 S(0)= ارزیابی شد.

کلیدواژه‌ها

موضوعات

فیزیک هسته ای

عنوان مقاله [English]

Numerical study of transition rate and B(E2) transition strengths for 17O(p,γ)18F reaction

نویسندگان [English]

Amir Hooman Aranpour
Hassan Khalili
Shahla Nahidinezhad
Masoumeh Dalvand

Department of Physics, Faculty of Science, Arak University, Arak 8349-8-38156, Iran

چکیده [English]

The study of the astrophysical S-factor is one of the methods of analyzing proton radiation capture reactions in the theoretical framework for low temperatures. In this research, we have numerically studied the proton radiative capture reaction by ¹⁷O using the Woods-Saxon potential model.
First, the astrophysical S-factor reaction was calculated at low energies, and then the reaction rate of was obtained from the astrophysical S-factor. Also, in this study, the electrical quadrupole transition strength (B[E2]) for excited states ¹⁸F nucleus has been calculated. We found that B[E2] depends on the energy and spin of the excited states.
The results corresponding to the astrophysical S-factor, reaction rate and transition strength at energy range of 200-500 keV were compared with experimental data and other theoretical models and were in good agreement. Also, the astrophysical S-factor at zero energy was calculated by the extrapolation method for (5/2)⁺ state and S(0)=4/8 keV b.

کلیدواژه‌ها [English]

Potential model
Radiative capturing reaction
Astrophysical factor S
Electrical transition strength

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