Gamma-ray multiplicities and fission modes in (208)Pb((18)O,f).

5 Analysis of fusion - fission dynamics by pre - scission neutron emission in 58 Ni + 208 Pb

گذر از شکافت نامتقارن به متقارن در واکنش شکافت اورانیم 238 با پروتونهای MeV 69 - 45

Thin targets of 238U were bombarded with 45, 55, 65 and 69 MeV protons at the Cyclotron and Radioisotope Center (CYRIC) of Tohoku University in Japan. Gamma rays emitted from the fission products were recorded and analyzed by using gamma spectroscopy. Then, the cross sections for the formation of fission products, fragment mass distributions, and total fission cross sections were measured. Spec...

ar X iv : n uc l - ex / 9 90 70 03 v 1 6 J ul 1 99 9 Coupled - channels analysis of the 16 O + 208 Pb fusion barrier distribution

Analyses using simplified coupled-channels models have been unable to describe the shape of the previously measured fusion barrier distribution for the doubly magic O+Pb system. This problem was investigated by remeasuring the fission excitation function for O+Pb with improved accuracy and performing more exact coupled-channels calculations, avoiding the constant-coupling and first-order coupli...

Shielding studies on a total-body neutron activation facility

Background: Prompt gamma neutron activation analysis (PGNAA) is known as a non-invasive technique capable of measuring elemental concentration in voluminous samples in a short period of time. Also it is a valuable diagnostic tool for total body elemental measurements. 252Cf and 241Am-Be sources which are usually used in this method, generate not only neutrons, but also emit high-energy and unwa...

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...