ElectromagneticB(E2)transition strengths along the yrast negative-parity band of113I

2003 ◽  
Vol 67 (5) ◽  
Author(s):  
P. Petkov ◽  
A. Dewald ◽  
A. Fitzler ◽  
T. Klug ◽  
G. de Angelis ◽  
...  
Keyword(s):  
Negative Parity ◽  
Parity Band ◽  
Negative Parity Band

Concerning a Possible K = 7/2 Negative Parity Band in 29Si

1971 ◽  
Vol 49 (3) ◽  
pp. 355-359 ◽  
Author(s):  
R. H. Spear ◽  
J. E. Cairns ◽  
R. V. Elliott ◽  
J. A. Kuehner ◽  
A. A. Pilt
Keyword(s):  
Gamma Radiation ◽  
Linear Polarization ◽  
Negative Parity ◽  
Parity Band ◽  
Polarization Studies ◽  
Negative Parity Band

Linear polarization studies of gamma radiation from the reaction 26Mg(α,nγ)29Si show that the parity of the 3.623 MeV [Formula: see text] state is negative, and that the spin and parity of the 5.255 MeV state are [Formula: see text] or [Formula: see text]. A previously reported unique [Formula: see text] assignment for the latter state is not confirmed.

scholarly journals Nuclear Gamma-soft Character in ¹²⁸Ba

2021 ◽  
Vol 3 (3) ◽  
pp. 16-20
Author(s):  
I. Hossain ◽  
Hewa Y. Abdullah ◽  
I. M. Ahmed ◽  
Fadhil I. Sharrad
Keyword(s):  
Energy Level ◽  
Vector Boson ◽  
Negative Parity ◽  
Measured Data ◽  
Interacting Boson Model ◽  
Parity Band ◽  
Boson Model ◽  
Experimental Values ◽  
Negative Parity Band

We report the properties of gamma soft O(6) of 128Ba isotones with neutron N = 72 using Interacting Vector Boson Model (IVBM), interacting Boson Model (IBM-1), Bohr-Mottelson Model (BM), and Doma-El-Gendy (D-G) relation. The first energy level ( ) and ratio  have been investigated which show that 128Ba has gamma-soft character. The curves Eγ/Vs.J of E-GOS of even 128Ba nucleus were compared with the standard curves of vibrational, gamma soft and rotational limits. The staggering factors were studied of available measured data of 128Ba nucleus. The yrast levels of this isotope are calculated by the model of VBMI, IBM-1, BM and D-G and they were compared by measured data. The negative parity band of 128Ba was calculated by IVBM and BM model and compared with experimental values.

Negative-Parity Band inV48

1974 ◽  
Vol 33 (2) ◽  
pp. 105-108 ◽  
Author(s):  
B. Haas ◽  
P. Taras
Keyword(s):  
Negative Parity ◽  
Parity Band ◽  
Negative Parity Band

scholarly journals "Beat" Patterns of Odd-Even Staggering in Octupole Bands of Light Actinides

2019 ◽  
Vol 11 ◽  
Author(s):  
Dennis Bonatsos ◽  
C. Daskaloyannis ◽  
S. B. Drenska ◽  
N. Karoussos ◽  
N. Minkov ◽  
...  
Keyword(s):  
Vector Boson ◽  
Negative Parity ◽  
Interacting Boson Model ◽  
Algebraic Models ◽  
Ground State Band ◽  
Parity Band ◽  
State Band ◽  
Boson Model ◽  
The Difference ◽  
Negative Parity Band

The Δ I = 1 staggering (odd-even staggering) in octupole bands of light actinides. is found to exhibit a "beat" behaviour as a function of the angular momentum J, forcing us to revise the traditional belief that this staggering decreases gradually to, zero and then remains at this zero value. Various algebraic models (spf-Interacting Boson Model, spdf-IBM, Vector Boson Model, Nuclear Vibron Model) predict in their su(3) limits constant staggering for this case, being thus unable to describe the "beat" behaviour. An explanation of the "beat" behaviour is given in terms of two Dunham expansions (expansions in terms of powers of I ( I + 1) ) with slightly different sets of coefficients for the ground state band and the negative parity band, the difference in the values of the coefficients being attributed to Coriolis couplings to other negative parity bands.

High-spin negative parity band in162Er

1976 ◽  
Vol 277 (2) ◽  
pp. 113-115 ◽  
Author(s):  
D. R. Zolnowski ◽  
H. Beuscher ◽  
T. T. Sugihara
Keyword(s):  
High Spin ◽  
Negative Parity ◽  
Parity Band ◽  
Negative Parity Band

Spin–Parity Combinations in 18O

1971 ◽  
Vol 49 (20) ◽  
pp. 2589-2598 ◽  
Author(s):  
R. W. Ollerhead ◽  
G. F. R. Allen ◽  
A. M. Baxter ◽  
J. A. Kuehner
Keyword(s):  
Negative Parity ◽  
Alpha Particles ◽  
Energy Spectra ◽  
Excitation Energies ◽  
Spin Parity ◽  
Unnatural Parity ◽  
Parity Band ◽  
Natural Parity ◽  
Negative Parity Band

Detection of inelastically scattered alpha particles near 180° from the reaction 18O(α,α′)18O has been used to identify natural parity levels in 18O. Energy spectra were recorded for 13 incident energies from 20.0 to 23.4 MeV. Levels at 4.45, 5.09, and 5.25 MeV have been identified as having natural parity, confirming earlier assignments of 1−, 3−, and 2+, respectively. Levels at 5.37 and 5.52 MeV have been identified as having unnatural parity leading to definite assignments of 3+ and 2−, respectively. The spin and parity of the 6.18 MeV level has been restricted to 1− or 2+. Other levels at higher excitation energies have been assigned natural parity, and the implications with regard to the identification of a negative parity band in 18O are discussed.

SHAPE EVOLUTION OF HIGHLY DEFORMED 75Kr AND PROJECTED SHELL MODEL DESCRIPTION

2010 ◽  
Vol 19 (08n09) ◽  
pp. 1754-1762 ◽  
Author(s):  
YING-CHUN YANG ◽  
YANG SUN ◽  
T. TRIVEDI ◽  
R. PALIT ◽  
J. A. SHEIKH
Keyword(s):  
Shell Model ◽  
Negative Parity ◽  
Model Description ◽  
Shape Evolution ◽  
Quadrupole Moments ◽  
Projected Shell Model ◽  
Model Calculations ◽  
High Spin States ◽  
Parity Band ◽  
Insight Into

A study of recently-measured high spin states of 75 Kr is carried out by using the Projected Shell Model. Calculations are performed up to spin I = 33/2 for the positive parity band and I = 27/2 for the negative parity band. Irregularities found in moment of inertia and in the deduced transition quadrupole moments Q t of the two bands are discussed in terms of the alignment of g 9/2 protons. Our study provides an insight into the shape evolution of the well-deformed nucleus 75 kr .

Study of high spin states in 149Tb observed by the (10B,3n) reaction

1979 ◽  
Vol 57 (11) ◽  
pp. 1959-1968 ◽  
Author(s):  
N. C. Singhal ◽  
M. W. Johns ◽  
J. V. Thompson
Keyword(s):  
High Spin ◽  
Energy Levels ◽  
Negative Parity ◽  
Positive Parity ◽  
Angular Distributions ◽  
Spin States ◽  
Core Nucleus ◽  
High Spin States ◽  
Parity Band ◽  
Positive Parity Band

Energy levels in 149Tb have been studied by the 142Nd (10B,3n) reaction using 54 MeV 10B beams from the McMaster University FN accelerator. Excitation functions, angular distributions, prompt γ–γ coincidence, electron conversion, and linear polarization measurements were obtained. On the basis of these measurements we have identified two rotaition-aligned πh11/2 bands, a negative parity band up to spin 27/2−, and a positive parity band up to spin 27/2+. The energy spacings between levels in these bands strongly resemble those in the ground state and the 3− octupole band of the adjacent 148Gd core nucleus. Other high spin positive parity states up to spin of 41/2 are also observed. These high spin states show some evidence of rotational structure in 14 9Tb.

scholarly journals Complete Spectroscopy of negative parity states in208Pb with Ex< 6.3 MeV

2014 ◽  
Vol 66 ◽  
pp. 02049 ◽  
Author(s):  
A. Heusler ◽  
T. Faestermann ◽  
R. Hertenberger ◽  
H.-F. Wirth ◽  
P. von Brentano
Keyword(s):  
Negative Parity

Low-lying Negative-parity Levels of 17N and 18N

1984 ◽  
Vol 37 (1) ◽  
pp. 17 ◽  
Author(s):  
FC Barker
Keyword(s):  
Shell Model ◽  
Weak Coupling ◽  
Coupling Model ◽  
Negative Parity ◽  
Positive Parity ◽  
Model Calculations

On the basis of a weak-coupling model, adjustments are made to the interactions used in the full shell model calculations of Millener in order to fit the experimental energies of the low-lying negativeparity levels of 16N and of the low-lying positive-parity levels of 180 and 190 . The predicted energies of the low-lying negative-parity levels of 17N then agree better with experiment, while those for 18N lead to suggested spin assignments for the observed levels.

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