Titre :	Spectroscopie du noyau 139Ce : Etude expérimentale et interprétation théorique
Type de document :	texte imprimé
Auteurs :	Samra Kaim, Auteur ; Fatima Benrachi, Directeur de thèse
Editeur :	Universite :mentouri constantine
Année de publication :	2015
Importance :	1 vol (105 f .)
Format :	29cm
Langues :	Français (fre)
Catégories :	Thèses & Mémoires:Physique
Mots-clés :	Physique
Index. décimale :	530-Physique
Résumé :	High-spin states in 139Ce have been populated by the 130Te(14C,5n) reaction, using ORGAM array installed at IPN Orsay. The level scheme has been extended to 43/2 ħ in spin and ~ 8 MeV in energy, including a new dipole band. The multipolarity has been measured by the ''Directional Correlation from Oriented states of nuclei'' (DCO) and anisotropy ratios, and the parity of several states has been changed from negative to positive. Extended shell-model calculations have been used to investigate the structure of the observed states. The good agreement of the shell-model calculations with the experimental level scheme supports the spin-parity assignment to low- and medium-spin states. The dipole band configuration was investigated using the CNS and TAC models. The π1h211/2⊗ν1h-111/2 configuration with a deformation of (ε2 = 0.12, γ = 0°) and rotation around a tilted axis with θ ≈ 70°, reproduces best the experimental aligned spins
Côte titre :	DPH/0274
En ligne :	https://bu.umc.edu.dz/theses/physique/KAI6915.pdf
Format de la ressource électronique :	PDF

Spectroscopie du noyau 139Ce : Etude expérimentale et interprétation théorique [texte imprimé] / Samra Kaim, Auteur ; Fatima Benrachi, Directeur de thèse . - [S.l.] : Universite :mentouri constantine, 2015 . - 1 vol (105 f .) ; 29cm.
Langues : Français (fre)

Catégories :	Thèses & Mémoires:Physique
Mots-clés :	Physique
Index. décimale :	530-Physique
Résumé :	High-spin states in 139Ce have been populated by the 130Te(14C,5n) reaction, using ORGAM array installed at IPN Orsay. The level scheme has been extended to 43/2 ħ in spin and ~ 8 MeV in energy, including a new dipole band. The multipolarity has been measured by the ''Directional Correlation from Oriented states of nuclei'' (DCO) and anisotropy ratios, and the parity of several states has been changed from negative to positive. Extended shell-model calculations have been used to investigate the structure of the observed states. The good agreement of the shell-model calculations with the experimental level scheme supports the spin-parity assignment to low- and medium-spin states. The dipole band configuration was investigated using the CNS and TAC models. The π1h211/2⊗ν1h-111/2 configuration with a deformation of (ε2 = 0.12, γ = 0°) and rotation around a tilted axis with θ ≈ 70°, reproduces best the experimental aligned spins
Côte titre :	DPH/0274
En ligne :	https://bu.umc.edu.dz/theses/physique/KAI6915.pdf
Format de la ressource électronique :	PDF