Levels of 186W from the Decay of 186Ta

1973 ◽  
Vol 51 (3) ◽  
pp. 241-256 ◽  
Author(s):  
S. C. Gujrathi ◽  
S. K. Mark
Keyword(s):  
Experimental Data ◽  
High Resolution ◽  
Excited States ◽  
Gamma Rays ◽  
Decay Scheme ◽  
Transition Probabilities ◽  
Recent Experimental Data ◽  
Particle State ◽  
Quasi Particle ◽  
Coincidence Data

Gamma rays from the decay of 10.5 min 186Ta have been studied using high resolution Ge(Li) detectors. More than 90 gamma rays have been observed. Several photo-peaks previously reported as single lines were found to be close doublets. The results of this study have been correlated with the published γ–γ coincidence data and the recent (d,d′) reaction work and a decay scheme for 186Ta has been constructed. The scheme incorporates more than 85 transitions among 23 excited states in 186W. The level at 1661 keV has been discussed in terms of a two-proton quasi-particle state arising from the Nilsson orbitals Ωπ[NnzΛ] = 7/2+[404] and 1/2+[411]. Several transition probabilities have been extracted and compared with other recent experimental data and with the calculations of Kumar and Baranger as well as with the predictions of various phenomenological models.

THE DECAY OF Re186 AND Re188

1956 ◽  
Vol 34 (1) ◽  
pp. 69-82 ◽  
Author(s):  
M. W. Johns ◽  
C. C. McMullen ◽  
I. R. Williams ◽  
S. V. Nablo
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Decay Scheme ◽  
Low Energy ◽  
End Points ◽  
Coincidence Measurements ◽  
Good Agreement

The energies and intensities of 13 gamma rays in Re188 have been measured by studying their external conversion spectra with a high resolution beta-ray spectrometer. An analysis of the beta-ray spectrum reveals groups with end points 2116 kev. (79%) and 1961 kev. (20%), and several low energy groups whose total intensity is of the order of 1%. The observed data can be consistently accounted for in terms of a decay scheme involving the following levels of OS188: 0.0, 155.0, 633, 1086, 1306, 1461, 1765, 1941, and 1958 kev. This scheme is firmly supported by coincidence measurements. The spins of the first three levels listed are 0+, 2+, and 2+ and that of the 1461 kev. level is probably 0+.The decay of Re186 is accompanied by gamma rays of the following energies and quantum intensities: 122.9 kev. (0.6%), 137.2 kev. (10%), 630.8 kev. (0.024%), and 768.2 kev. (0.024%). These values are in good agreement with those quoted in the literature, except for the intensities of the last two radiations.

scholarly journals Description of 160Dy nucleus by partial dynamical SU(3) symmetry

Open Physics ◽  
2013 ◽  
Vol 11 (4) ◽  
Author(s):  
Naser Fouladi ◽  
Mohammadali Jafarizadeh ◽  
Javad Fouladi ◽  
Hadi Sabri
Keyword(s):  
Experimental Data ◽  
Transition Probabilities ◽  
Dynamical Symmetry ◽  
Nuclear Spectroscopy ◽  
Interacting Boson Model ◽  
Recent Experimental Data ◽  
Model Framework ◽  
Boson Model ◽  
Characteristic Features ◽  
Symmetry Structure

AbstractWe considered the characteristic features of SU(3) partial dynamical symmetry in the interacting boson model framework to show the relevance of such intermediate symmetry structure in the nuclear spectroscopy of the 160Dy nucleus. The predictions of SU(3)-PDS for the energy spectrum and the transition probabilities were compared with the most recent experimental data and an acceptable degree of agreement was achieved.

1s hole excited states of Be: partial autoionization rates compared with recent experimental data

1991 ◽  
Vol 69 (5) ◽  
pp. 603-605
Author(s):  
D. Petrini ◽  
J. A. Tully
Keyword(s):  
Experimental Data ◽  
Excited States ◽  
Cross Section ◽  
Ground State ◽  
Photoionization Cross Section ◽  
Recent Experimental Data ◽  
Auger Decay ◽  
Close Coupling ◽  
University College London ◽  
The University

Auger decay following inner-shell photoexcitation of atomic beryllium is studied using the University College London close-coupling codes. We reproduce some of the features observed experimentally by Krause and co-workers. The vastly predominant decay mode of Be 1s2s2np1P° is to Be+ 1s2np rather than the ground state of Be+ and the theoretical np/2s ratio agrees with the experimental value. The peak observed in the partial photoionization cross section for formation of 1s(2s2p3P) 2P° is due to photoexcitation of 1s2s(3s3p3P) 1P° followed by autoionization. Our theoretical result reproduces this feature. Strong configuration interaction effects limit the accuracy we can achieve for the radiationless decay width.

Levels in 89Rb Populated by the Beta Decay of 89Kr

1972 ◽  
Vol 50 (22) ◽  
pp. 2741-2752 ◽  
Author(s):  
W. F. S. Poehlman ◽  
B. Singh ◽  
M. W. Johns
Keyword(s):  
Excited States ◽  
Beta Decay ◽  
Gamma Rays ◽  
Large Volume ◽  
Ground State ◽  
Level Scheme ◽  
Gamma Coincidence ◽  
Coincidence Data ◽  
Coincidence Arrangement

The decay of 3.2 min 89Kr has been investigated with small and large volume Ge(Li) detectors used singly and in a dual parameter coincidence arrangement. A total of 162 gamma rays are identified with the decay of this isotope, 120 of which are placed in a level scheme on the basis of gamma–gamma coincidence evidence and the energy differences between established levels. Levels at 220.9, 497.7, 577.3, 586.1, 930.7, 931.5, 997.6, 1195.5, 1324.6, 1530.1, 1533.6, 1694.1, 1822.1, 1998.9, 2160.5, 2401.5, 2598.5, 2867.2, 3099.7, 3329.9, 3363.1, 3372.1, 3534.1, 3719.3, 4145.1, 4217.4, 4340.9, and 4487.5 keV are well established by coincidence data and many energy sums. The levels proposed at 2783.4, 3429.7, 3456.6, 3978.4, 4058.4, and 4406.5 keV are less securely established. The most probable spins of the ground state and the first two excited states arc 3/2−. 5/2− and 1/2− respectively. Improved energies and intensities of the gamma rays from the decay of 15 min 89Rb have also been determined.

Study of 242−248Cm isotopes in the projected shell model framework

2016 ◽  
Vol 25 (04) ◽  
pp. 1650024
Author(s):  
Saiqa Sadiq ◽  
Rani Devi ◽  
S. K. Khosa
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Transition Probabilities ◽  
Negative Parity ◽  
Yrast Band ◽  
Spin States ◽  
Particle Structure ◽  
Projected Shell Model ◽  
Model Framework ◽  
Quasi Particle

The projected shell model framework is employed to study the band spectra in [Formula: see text]Cm isotopes. The present calculations reproduce the available experimental data on the yrast bands. Besides this, B(E2) transition probabilities of even–even Cm isotopes have also been calculated. The low spin states of yrast band are seen to arise purely from zero-quasi-particle (o-qp) intrinsic states whereas the high spin states have multi-quasi-particle structure. For the odd-neutron (odd-[Formula: see text]) isotopes, the calculated results qualitatively reproduce the available data on ground and lowest excited state bands for [Formula: see text]Cm. However, for [Formula: see text]Cm the negative-parity ground state band is in reasonable agreement with the experimental data.

Level structure of 88Rb

1970 ◽  
Vol 48 (6) ◽  
pp. 753-758 ◽  
Author(s):  
H. Lycklama ◽  
T. J. Kennett
Keyword(s):  
High Resolution ◽  
Beta Decay ◽  
Gamma Rays ◽  
Decay Scheme ◽  
Level Structure ◽  
Good Efficiency

The beta decay of 2.8 h 88Kr has been investigated using a high-resolution and good efficiency 40 cm3 coaxial Ge(Li) counter. A total of 40 gamma rays were detected and determined to belong to the beta decay of 88Kr. All but one of these were placed in a consistent decay scheme. As a result it was possible to give a plausible interpretation to the level structure of 88Rb.

Gamma rays produced in the 209Bi(n, n′γ) reaction

1984 ◽  
Vol 62 (10) ◽  
pp. 948-962 ◽  
Author(s):  
W. V. Prestwich ◽  
T. J. Kennett ◽  
J. S. Tsai
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Energy Region ◽  
Weak Coupling ◽  
Decay Scheme ◽  
High Energy ◽  
High Energy Region ◽  
Γ Rays ◽  
Γ Ray ◽  
Resolution Study

A high-resolution study of the γ-ray spectrum induced by the inelastic scattering of reactor produced neutrons has been conducted. The γ rays observed have been assigned in a decay scheme involving 134 levels extending in excitation energy to 6 MeV. The results are discussed within the context of previously identified weak coupling configurations, and possible discrepancies are indicated. Levels in the high-energy region are also compared with recently reported photoexcitation studies.

Excited states of even-A and odd-A nuclei with deformation-dependent mass parameters for the Kratzer potential

2021 ◽  
Author(s):  
M. Chabab ◽  
I. El-ilali ◽  
A. Lahbas ◽  
M. Oulne
Keyword(s):  
Experimental Data ◽  
Excited States ◽  
Transition Probabilities ◽  
Energy Spectra ◽  
Asymptotic Iteration Method ◽  
Axially Symmetric ◽  
Electromagnetic Transition ◽  
Energy Eigenvalues ◽  
Dependent Mass ◽  
Davidson Potential

The low-lying collective spectra for axially symmetric nuclei are described within the Bohr–Hamiltonian by considering deformation-dependent mass coefficients and Kratzer potential in [Formula: see text] part. The energy eigenvalues and the total wave function of the problem are obtained in compact forms by means of the asymptotic iteration method. The numerical calculations are carried out for energy spectra as well as electromagnetic transition probabilities, and compared with experimental data in both cases: within and without the deformation-dependent mass (DDM) formalism. We investigate the nuclear observables of four even-A nuclei [Formula: see text]Sm, [Formula: see text]Gd, [Formula: see text]Yb, [Formula: see text]W and two odd-A nuclei [Formula: see text]Yb, [Formula: see text]Dy. Moreover, we will show that the choice of the Kratzer potential minimizes the level spacings within the [Formula: see text] band, which are usually overestimated by Bohr–Hamiltonian with Davidson potential.

THE DECAY OF Os191 AND Os193

1958 ◽  
Vol 36 (10) ◽  
pp. 1409-1429 ◽  
Author(s):  
S. V. Nablo ◽  
M. W. Johns ◽  
R. H. Goodman ◽  
A. Artna
Keyword(s):  
Excited States ◽  
Gamma Rays ◽  
Cross Sections ◽  
Decay Scheme ◽  
Internal Conversion ◽  
Gamma Ray ◽  
Internal Conversion Coefficients ◽  
Gamma Coincidence ◽  
Conversion Coefficients ◽  
Activation Cross Sections

The beta- and gamma-ray spectra of Os191 and Os193 have been studied with a magnetic beta-ray spectrometer, scintillation spectrometers, and coincidence circuits. The 14-hour isomer of Os191 decays via a 0.0742-Mev (M3) transition. Gamma rays of energy 0.0418 (100%, E3), 0.0809 (1%, M1 + E2), 0.1287 (100%, M1 + E2), and 0.1858 (0.1%) Mev have been found to be associated with the 14.6 ± 0.3 day decay of Os191 and an extension of the accepted decay scheme proposed. The following 19 transitions have been associated with the 31.5 ± 0.5 hour decay of Os193: 0.0730 (14%), 0.1068 (~1%), 0.1393 (10%), 0.180 (0.3%), 0.196 (0.1%), 0.243 (~0.2%), 0.2485 (0.3%), 0.2514 (0.4%), 0.278 (0.6%), 0.2810 (1.6%), 0.2885 (0.3%), 0.2994 (0.4%), 0.314 (0.3%), 0.3218 (1.7%), 0.3620 (0.6%), 0.3878 (1.6%), 0.4604 (4.1%), 0.4857 (0.3%), and 0.5585 (2.2%). The internal conversion coefficients for all the stronger transitions suggest that they are M1 + E2 in character. The decay energy of Os193 is 1.132 ± 0.005 Mev. Fermi analyses and beta–gamma coincidence experiments have established excited states of Ir193 at 0.073, 0.139, 0.281, 0.362, 0.460, and 0.559 Mev above the ground state. Six otherwise unclassified weak gamma rays can be accommodated if levels at 0.247, 0.315, and 0.613 Mev are included in the decay scheme.The activation cross sections of Os184 and Os190 are (2.2 ± 0.5) × 103and 5.3 ± 2 barns respectively, relative to Seren's value of 1.6 ± 0.4 barns for Os192.

A study of the levels in 19 F following the -decay of 19 O

1959 ◽  
Vol 252 (1268) ◽  
pp. 1-15 ◽  
Keyword(s):  
Angular Correlation ◽  
Excited States ◽  
Decay Scheme ◽  
Transition Probabilities ◽  
Theoretical Calculations ◽  
Collective Model ◽  
Particle Model ◽  
Β Decay ◽  
Intermediate Coupling ◽  
The Individual

The β-decay scheme of 19 O to states of 19 F has been determined, and log ft values assigned to the individual transitions, by studying the y-rays following β-decay. The decay schemes of the levels in 19 F have been elucidated by coincidence and angular correlation measurements. These measurements have enabled characteristics to be assigned to the excited states of 19 F, and relative y-transition probabilities have been determined. The results are compared with theoretical calculations on the individual-particle model in intermediate coupling and on the collective model.

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