High Spin States in the Odd–Odd 150Eu Nucleus

1997 ◽  
Vol 12 (16) ◽  
pp. 2791-2808 ◽  
Author(s):  
J. M. Chatterjee ◽  
Somapriya Basu ◽  
U. Datta Pramanik ◽  
S. Bhattacharya ◽  
R. K. Chattopadhyay ◽  
...  
Keyword(s):  
High Spin ◽  
Positive Parity ◽  
Spin States ◽  
Phonon Coupling ◽  
Axially Symmetric ◽  
Rotational Bands ◽  
Isomeric Level ◽  
High Spin States ◽  
Symmetric Rotor ◽  
Rotor Core

High spin rotational bands in the odd–odd 150Eu nucleus, produced in the 148Nd(7Li,5n) reaction, were investigated by in-beam γ spectroscopy. Seven bands above the 588.8 keV (45 ns) isomeric level were observed. Probable single- and double-octupole-phonon coupling states were identified. Two positive parity bands are interpreted in terms of two quasiparticles (a proton and a neutron) coupled to an axially symmetric rotor core. Otherwise, the rest of the high spin levels are described by multiparticle–hole excitations.

CONFIGURATION ASSIGNMENT OF THE POSITIVE-PARITY STRUCTURES IN 108Ag

2011 ◽  
Vol 20 (11) ◽  
pp. 2351-2359 ◽  
Author(s):  
C. LIU ◽  
S. Y. WANG ◽  
B. QI ◽  
D. P. SUN ◽  
C. J. XU ◽  
...  
Keyword(s):  
High Spin ◽  
Beam Energy ◽  
Positive Parity ◽  
Spin States ◽  
High Spin States ◽  
Parity Band ◽  
Configuration Assignment ◽  
Higher Spins ◽  
Band Crossing ◽  
Positive Parity Band

The high-spin states of 108 Ag have been studied by the in-beam γ spectroscopy with the reaction 104 Ru (7 Li ,3n)108 Ag at a beam energy of 33 MeV. The previously known positive-parity band structures have been extended up to higher spins. Their configurations are discussed based on alignments, band-crossing frequencies, and B(M1)/B(E2) ratios.

High-spin states of rotational bands built upon νi13/2 in 166Lu

2000 ◽  
Vol 8 (1) ◽  
pp. 1-3 ◽  
Author(s):  
C. S. Lee ◽  
J. H. Ha ◽  
J. H. Lee ◽  
J. Y. Huh ◽  
J. C. Kim ◽  
...  
Keyword(s):  
High Spin ◽  
Spin States ◽  
Rotational Bands ◽  
High Spin States

Evidence for yrast positive-parity high-spin states in odd-odd72As

1998 ◽  
Vol 57 (1) ◽  
pp. 97-103 ◽  
Author(s):  
J. Döring ◽  
D. Pantelicǎ ◽  
A. Petrovici ◽  
B. R. S. Babu ◽  
J. H. Hamilton ◽  
...  
Keyword(s):  
High Spin ◽  
Positive Parity ◽  
Spin States ◽  
High Spin States

PROJECTED SHELL MODEL AND HIGH-SPIN SPECTROSCOPY

1995 ◽  
Vol 04 (04) ◽  
pp. 637-785 ◽  
Author(s):  
KENJI HARA ◽  
YANG SUN
Keyword(s):  
Shell Model ◽  
High Spin ◽  
Computing Time ◽  
Technical Information ◽  
Quantum Mechanical ◽  
Magic Numbers ◽  
Spin States ◽  
Axially Symmetric ◽  
Projected Shell Model ◽  
High Spin States

Most of the nuclei in the nuclear chart are deformed except for those in the vicinity of the magic numbers. It is difficult to treat such nuclei within the framework of the standard (spherical) shell model. On the other hand, the necessity for a proper quantum mechanical treatment of high-spin states has been steadily growing ever since modern experimental techniques made it possible to measure the fine details of the high-spin states of heavy nuclei. The present article reviews an approach based on the angular momentum projection technique which was initiated in the late seventies for the purpose of carrying out shell model configuration mixing calculations efficiently. A large number of examples is presented with an emphasis on the physical interpretation of the numerical results. Computing time for the whole spectrum up to spin ≈ 40 of an axially symmetric rare-earth nucleus takes only a few minutes on a Mainframe, showing the efficiency of the method. Most of the present calculations were carried out on a Workstation, but computation on a modern PC also presents no problem, so that one can enjoy a genuine quantum mechanical analysis of high-spin data using a facility available everywhere. Detailed technical information which may be useful for programming purposes is given in an Appendix.

High-Spin States inNe20and Their Possible Classification into Rotational Bands

1972 ◽  
Vol 5 (6) ◽  
pp. 1995-2006 ◽  
Author(s):  
A. D. Panagiotou ◽  
H. E. Gove ◽  
S. Harar
Keyword(s):  
High Spin ◽  
Spin States ◽  
Rotational Bands ◽  
High Spin States

scholarly journals High spin structure of 155Dy

2019 ◽  
Vol 3 ◽  
pp. 114
Author(s):  
C. T. Papadopoulos ◽  
R. Vlastou ◽  
M. Serris ◽  
C. A. Kalfas ◽  
N. Fotiades ◽  
...  
Keyword(s):  
High Spin ◽  
Beam Energy ◽  
Spin Structure ◽  
Negative Parity ◽  
Spin States ◽  
Detailed Structure ◽  
Strongly Coupled ◽  
Rotational Bands ◽  
High Spin States ◽  
Coincidence Measurements

High spin states in 155Dy have been studied by γ-γ coincidence measurements via the 124Sn(36S, 5n)155Dy reaction at a beam energy of 155 MeV. Eight rotational bands have been populated and observed up to high spin (I<91/2).The band features have been analysed within the framework of the cranked shell model. The Ì13/2 neutron alignments and the h11/2 proton alignments are discussed. B(M1)/B(E2) ratios have also been extracted for the strongly coupled bands to deduce further information on the detailed structure of these bands. For the highest states (above spin 30) of the negative parity bands an irregularity in y-ray energies appears which is discussed in terms of band termination.

scholarly journals High Spin Structure of 122Xe

2020 ◽  
Vol 6 ◽  
pp. 140
Author(s):  
M. Serris ◽  
Et al.
Keyword(s):  
High Spin ◽  
Beam Energy ◽  
Spin Structure ◽  
Positive Parity ◽  
Spectroscopic Methods ◽  
Spin States ◽  
High Spin States ◽  
Parity Band ◽  
Γ Ray ◽  
Positive Parity Band

High spin states in the isotope 122Xe  were populated using the reaction 96Zn(30Si,2n)122Xe at a beam energy of 135 MeV. The subsequent γ-ray deexcitation was studied using γ-ray spectroscopic methods. The analysis of γ-γ coincidences has revealed two new structures of competing dipole and quadrupole transitions. The highest states of a positive parity band provide characteristics consistent with an approach to band termination.

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.

Band crossings in the positive-parity high-spin states of83Rband85Y

1999 ◽  
Vol 60 (1) ◽  
Author(s):  
J. Döring ◽  
G. D. Johns ◽  
R. A. Kaye ◽  
M. A. Riley ◽  
S. L. Tabor
Keyword(s):  
High Spin ◽  
Positive Parity ◽  
Spin States ◽  
High Spin States
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