Effect of differences in proton and neutron density distributions on fission barriers

Assessment of The Relation Between Energy Of Primary Protons And Undesired Neutron Dose During Proton Therapy By Monte Carlo Method

Introduction: High-energy beams of protons offer significant advantages for the treatment of deepseated local tumors. Their physical depth-dose distribution in tissue is characterized by a small entrance dose and a distinct maximum -Bragg peak- near the end of range with a sharp fall-off at the distal edge. Alongside its advantages there are some point that they need to meticul...

Fission barriers in the neutron-proton isospin plane for heavy neutron-rich nuclei

Fragmentation of very neutron - rich projectiles around 132 Sn

We propose an experiment to isotopically identify and determine the production cross sections of residual nuclei in the fragmentation of very neutron-rich nuclei around Sn produced in the fission of relativistic U primary projectiles. These measurements will provide valuable information about a possible two-step reaction scheme (fission-fragmentation) to optimise the production of extremely neu...

بررسی دینامیکی ذرات خارج شده از هسته برانگیخته با استفاده از روش لانژوین

Using Langevin dynamics and the dissipative nature of the fission process, we have studied dynamical variations of nucleus from the formation of the compound nucleus to separation stage of two fission fragments. During this dissipative process, particles such as neutron, proton, alpha particle and gamma ray emit from the compound system. In the present work, the number of emitted particles usin...

بررسی توزیع زاویه‌ای پاره‌های شکافت هسته ‌های طلا و بیسموت با پروتونهای 25MeVتا30MeV

  The fission fragment angular distributions have been measured for proton-induced fission of 209Bi and 197Au nuclei using surface barrier detectors at several energies between 25 MeV and 30 MeV. The experimental anisotropies are found to be in agreement with the predictions of the Standard Saddle-Point Statistical Model (SSPSM). The fission cross sections of 209Bi 197Au nuclei were also measur...