000			02276cam a2200325 a 4500
003			EG-GiCUC
008			190131s2018 ua d f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aPh.D
099			_aCai01.12.20.Ph.D.2018.La.O
100	0		_aLaila Hassan Mohammad Amer
245	1	0	_aOn the cluster radioactivity of heavy nuclei / _cLaila Hassan Mohammad Amer ; Supervised Walaa Mohamed Seif , Mahmoud Yahia Ismail , Amal I. Refaei
246	1	5	_aالنشاط الإشعاعى العنقودي للأنوية الثقيلة
260			_aCairo : _bLaila Hassan Mohammad Amer , _c2018
300			_a112 P. : _bcharts ; _c25cm
502			_aThesis (Ph.D.) - Cairo University - Faculty of Science - Department of Physics
520			_aThe most probable cluster decays that might be observed from ²¹⁷-²³⁸U isotopes have been investigated. The more-probable binary fragmentations corresponding to the local minima in the driving potentials with respect to the mass number Ac and atomic number Zc, individually, are singled out. The calculations are preformed based on the Skyrme-SLy4 nucleon-nucleon interaction and the folded Coulomb interaction. In the frame work of the preformed cluster model, we calculated the cluster decays half-lives and their branching ratios, with respect to the total half-life of the investigated isotope. The quantum knocking frequency and penetration probability based on the Wentzel-Kramers-Brillouin approximation are used to find the decay width. We considered the more-probable decays that commonly manifest themselves via cold valleys in the driving potentials with respect to both Ac and Zc. Among the indicated favored decays involving emitted light clusters heavier than Ü-particle, 28 decay modes exhibit calculated half-lives less than 10²² years with branching ratio larger than 10-¹⁴%
530			_aIssued also as CD
653		4	_aCluster radioactivity
653		4	_aHalf-life
653		4	_aPreformation probability
700	0		_aAmal I. Refaei , _eSupervisor
700	0		_aMahmoud Yahia Ismail , _eSupervisor
700	0		_aWalaa Mohamed Seif , _eSupervisor
905			_aAsmaa _eCataloger
905			_aNazla _eRevisor
942			_2ddc _cTH
999			_c69873 _d69873