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

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.

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High Spin Structure of 122Xe

HNPS Proceedings ◽

10.12681/hnps.2923 ◽

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.

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

Canadian Journal of Physics ◽

10.1139/p79-269 ◽

1979 ◽

Vol 57 (11) ◽

pp. 1959-1968 ◽

Cited By ~ 12

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.

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High Spin States in the Odd–Odd 150Eu Nucleus

International Journal of Modern Physics A ◽

10.1142/s0217751x97001547 ◽

1997 ◽

Vol 12 (16) ◽

pp. 2791-2808 ◽

Cited By ~ 1

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.

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