scholarly journals Role of quadrupole deformation and continuum effects in the “island of inversion” nuclei F28,29,31

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Yu-Xuan Luo ◽  
Kévin Fossez ◽  
Quan Liu ◽  
Jian-You Guo
Keyword(s):  
Quadrupole Deformation ◽  
Island Of Inversion

Scattering of α-particles by 11B nuclei at an energy of 40MeV and role of the exchange mechanism with transfer of 7Li

2018 ◽  
Vol 27 (11) ◽  
pp. 1850094
Author(s):  
N. Burtebayev ◽  
Maulen Nassurlla ◽  
Marzhan Nassurlla ◽  
N. Saduyev ◽  
A. Sabidolda ◽  
...  
Keyword(s):  
Deformation Parameter ◽  
Quadrupole Deformation ◽  
Collective Model ◽  
Negative Sign ◽  
Exchange Mechanism ◽  
Angular Distributions ◽  
Coupled Channels ◽  
Quadrupole Deformation Parameter ◽  
Α Particles

The elastic and inelastic scatterings of [Formula: see text]-particles were investigated at an energy of 40[Formula: see text]MeV with excitation of low-lying states of the [Formula: see text]B nucleus [0.0 (3/2[Formula: see text]), 4.445 (5/2[Formula: see text]), 6.74 (7/2[Formula: see text]), 2.125 (1/2[Formula: see text]) and 5.02[Formula: see text]MeV (3/2[Formula: see text])]. The analysis of the experimental angular distributions was carried out via the coupled channels method within the framework of the collective model. The value of the quadrupole deformation parameter [Formula: see text] was extracted. Calculations indicate a preference for a negative sign for deformation. It is shown that the exchange mechanism with the transfer of the heavy 7Li cluster does not play an important role in the scattering of [Formula: see text]-particles on [Formula: see text]B nuclei at an energy of 40[Formula: see text]MeV.

Role of triaxiality parameter γ in deformed nuclei

2020 ◽  
Vol 29 (06) ◽  
pp. 2050037
Author(s):  
J. B. Gupta
Keyword(s):  
Intimate Relationship ◽  
Quadrupole Deformation ◽  
Spectral Features ◽  
Usual Practice ◽  
Deformed Nuclei ◽  
Variable Formula ◽  
Unified View ◽  
The Absolute ◽  
Relationship Of

The well known, one-parameter Davydov–Filippov model (DFM) or its variants have been used often to study the inter band [Formula: see text]-g B(E2) ratios for the triaxially deformed nuclei. Here, its application for the axially deformed nuclei with [Formula: see text] less than [Formula: see text] is illustrated, which has not received attention so far. Instead of the usual practice of studying the gamma-ground B(E2) ratios, we focus on the absolute B(E2) values in DFM. It offers a wholly new role of the [Formula: see text]-variable in explaining the spectral features of the axially deformed nuclei. Further, it illustrates the intimate relationship of the [Formula: see text] variable and the quadrupole deformation variable [Formula: see text]. Additionally, a unified view of the various differing patterns of the variation of the [Formula: see text]-g B(E2) ratios versus [Formula: see text] is presented.

scholarly journals Shape phase changes with N in 72−84Kr isotopes

2020 ◽  
Vol 29 (09) ◽  
pp. 2030008
Author(s):  
J. B. Gupta ◽  
J. H. Hamilton
Keyword(s):  
Large Deformation ◽  
Quadrupole Deformation ◽  
Phase Changes ◽  
Spectral Features ◽  
Band Structures ◽  
Nuclear Core ◽  
Nuclear Interactions ◽  
Specific Formula ◽  
Striking Contrast

The Kr isotopes lying in between the lighter isotopes of (Zn, Ge and Se) and the heavier isotopes of (Sr and Zr) in the [Formula: see text]–80 region exhibit very interesting spectral features. The spectra of [Formula: see text]Kr isotopes display a striking contrast from those of Zn, Ge and Se isotopes. The role of spherical and oblate and prolate deformed subshell gaps at specific [Formula: see text] and [Formula: see text] and the resulting re-inforcement are strikingly evident in these contrasting features, with variation in [Formula: see text] or [Formula: see text]. The evolution of the spectral features in Kr isotopes with [Formula: see text] as reflected in the quadrupole deformation, [Formula: see text]-band structures, [Formula: see text]0 decay, [Formula: see text]2) values, [Formula: see text]-softness of the nuclear core and odd–even staggering in [Formula: see text]-bands is studied to explore the role of the under lying nuclear interactions. The correlations with odd–[Formula: see text] isotopes are explored. The shape co-existence displayed in some Kr isotopes is studied. The large deformation observed in the ground bands of [Formula: see text]Kr, as exhibited in the [Formula: see text]2) values, is especially interesting.

INFLUENCE OF THE ENTRANCE CHANNEL EFFECTS ON THE FORMATION PROCESS OF SUPERHEAVY ELEMENTS

2005 ◽  
Vol 14 (03) ◽  
pp. 327-332 ◽  
Author(s):  
M. KOWAL ◽  
Z. ŁOJEWSKI
Keyword(s):  
Cross Sections ◽  
Formation Process ◽  
Heavy Ions ◽  
Nuclear Reactions ◽  
Quadrupole Deformation ◽  
Superheavy Nuclei ◽  
Flerov Laboratory ◽  
Channel Effects ◽  
Spin Distributions

For the description of heavy-ions collisions the importance of multipole deformations of the reaction partners beyond the quadrupole deformation is investigated in particular on fusion cross sections, barrier and spin distributions. The role of fragment orientation in a collision is studied. We have applied our method to Ca – induced reactions leading to superheavy nuclei recently discovered at the Flerov Laboratory of Nuclear Reactions in Dubna. We will show that our predictions are very well confirmed by the recent experiments.

Study of alpha-decay half-lives with deformed, oriented daughter nuclei

2015 ◽  
Vol 24 (02) ◽  
pp. 1550010 ◽  
Author(s):  
D. Naderi ◽  
M. Zargooshi
Keyword(s):  
Linear Relation ◽  
Half Life ◽  
Daughter Nucleus ◽  
Potential Model ◽  
Alpha Decay ◽  
Quadrupole Deformation ◽  
Decay Process ◽  
Proximity Potential

In this paper, Coulomb and proximity potential model has been applied to calculate the half-lives of alpha-decay for isotopes around N = Z = 50. Using this model, we investigated the influence of deformation and orientation of daughter nucleus on alpha-decay half-lives. Two orientations (90° and 180°) with quadrupole deformation are applied to study the role of daughter orientation in alpha-decay process. It is found that the deformation and orientation of daughter nucleus affects the alpha-decay half-life and changes the slope and intercept of linear relation between log10(T1/2) and Q-1/2.

Role of shape and quadrupole deformation of parents in the cluster emission of rare earth nuclei

2014 ◽  
Vol 23 (01) ◽  
pp. 1450002 ◽  
Author(s):  
K. K. Girija ◽  
Antony Joseph
Keyword(s):  
Rare Earth ◽  
Decay Rate ◽  
Nuclear Structure ◽  
Half Life ◽  
Branching Ratio ◽  
Quadrupole Deformation ◽  
Cluster Emission ◽  
Α Decay ◽  
Rare Earth Nuclei

The nuclear structure effects on α decay and cluster emission are investigated in the case of even–even rare earth nuclei150–160Dy ,150–160Er ,150–160Yb ,158,162,166–176Hf ,160,164–178W and162,166,170–180Os . The role of shape and deformation of parent nuclei in the decay rate is studied by taking the Coulomb and proximity potentials as the interacting barrier for the post scission configuration. The quadrupole deformation of parent nuclei causes a slight change in the half-life of α emissions, but it affects the rate of heavy cluster emissions significantly. Prolate deformation of parents enhances cluster emission, while an oblate deformation slows down the decay. Shape and deformation of parent nuclei causes change in the branching ratio also. A prolate deformation increases the branching ratio, whereas an oblate deformation reduces it. Highest branching ratio is predicted at N ~ 90.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management
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