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.

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.

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.

Negative-parity high-spin states and a possible magnetic rotation band inPr7659135

2015 ◽  
Vol 92 (5) ◽  
Author(s):  
Ritika Garg ◽  
S. Kumar ◽  
Mansi Saxena ◽  
Savi Goyal ◽  
Davinder Siwal ◽  
...  
Keyword(s):  
High Spin ◽  
Negative Parity ◽  
Magnetic Rotation ◽  
Spin States ◽  
High Spin States ◽  
Rotation Band

High spin states in 96Tc populated through the (α,n) reaction

1980 ◽  
Vol 58 (2) ◽  
pp. 174-190 ◽  
Author(s):  
H. A. Mach ◽  
M. W. Johns ◽  
J. V. Thompson
Keyword(s):  
Theoretical Model ◽  
High Spin ◽  
Spin Structure ◽  
Gamma Ray ◽  
Angular Distributions ◽  
Spin States ◽  
High Spin States ◽  
Gamma Coincidence ◽  
Electron Conversion ◽  
Conversion Coefficients

High spin states of 96Tc populated by the (α,n) reaction using alpha beams from 13 to 27 MeV have been studied. Gamma-ray energies and intensities, gamma–gamma coincidence probabilities, gamma-ray angular distributions, and electron conversion coefficients were determined at 18 MeV. In addition, some results taken at 14 MeV are reported.The high spin structure observed in this work includes the following levels: 49.3(6+), 318.8(6+), 574.7(7+), 926.9(9+), 946.5(8+), 1062.1(8+), 1138.8(8+), 1447.2(9+), 1702.8(10+), 1861.6(9+), 1922.3(11+), 2147.5(11+), 2213.5(10(+)), 2317.2(12+), 2396.8(11(+)), 2599.0((13)+), 2642.4((14)+), and 3020.1(12(+)).These experiments also clarify and extend the information obtained by previous workers. In particular, evidence is adduced for low-lying states at 0.0(7+), 34.3(4+), 45.3(5+), 120.3(3−), 177.0(5+), 226.2(2−), 227.0(4+), and 254.3(3+).The work identifies many other states of intermediate energy.Attenuation coefficients for states in 96Tc are calculated using a theoretical model.

HIGH SPIN STATES IN 184Pt AND 172W NUCLIDES AND CORE EXCITATION IN IBA CALCULATION

1987 ◽  
Vol 02 (10) ◽  
pp. 715-719
Author(s):  
S. T. HSIEH ◽  
M. M. KING YEN
Keyword(s):  
High Spin ◽  
Energy Levels ◽  
Structure Change ◽  
Interacting Boson Model ◽  
Spin States ◽  
Quadrupole Moments ◽  
Core Excitation ◽  
High Spin States ◽  
The Core ◽  
Boson Model

The core-excited interacting boson model up to two boson excitation is applied to 184 Pt and 172 W nuclides. In addition to energy levels (backbending), the calculated transition quadrupole moments of 172 W also reproduces the experimentally observed behavior, namely, a reduction at high spin. Incidentally a structure change between the lighter and the heavier Pt isotopes manifests itself in the study.

scholarly journals Erratum: Negative-parity high-spin states and a possible magnetic rotation band in Pr7659135 [Phys. Rev. C 92 , 054325 (2015)]

2019 ◽  
Vol 100 (6) ◽  
Author(s):  
Ritika Garg ◽  
S. Kumar ◽  
Mansi Saxena ◽  
Savi Goyal ◽  
Davinder Siwal ◽  
...  
Keyword(s):  
High Spin ◽  
Negative Parity ◽  
Magnetic Rotation ◽  
Spin States ◽  
High Spin States ◽  
Rotation Band

scholarly journals Population of a low-spin positive-parity band from high-spin intruder states in 177Au: The two-state mixing effect

2020 ◽  
Vol 806 ◽  
pp. 135488 ◽  
Author(s):  
M. Venhart ◽  
M. Balogh ◽  
A. Herzáň ◽  
J.L. Wood ◽  
F.A. Ali ◽  
...  
Keyword(s):  
High Spin ◽  
Positive Parity ◽  
Mixing Effect ◽  
Parity Band ◽  
State Mixing ◽  
Positive Parity Band ◽  
Intruder 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

A Kπ = 0− Octupole Band in 150Sm

1975 ◽  
Vol 53 (13) ◽  
pp. 1229-1235 ◽  
Author(s):  
J. V. Thompson ◽  
M. W. Johns ◽  
J. C. Waddington
Keyword(s):  
High Spin ◽  
Conversion Electron ◽  
Gamma Ray ◽  
Angular Distributions ◽  
Spin States ◽  
High Spin States ◽  
Gamma Coincidence

A study of the 148Nd(α, 2n)150Sm reaction has revealed the high spin states of a Kπ = 0− octupole band, the members of which become the yrast levels above spin 12. Gamma ray angular distributions, gamma–gamma coincidence, and conversion electron studies have established the levels of the octupole band at 1764.6(7−), 2232.1(9−), 2744.0(11−), and tentatively at 3293.0(13−) keV.

Levels in 148Tb excited by the (6,7Li,xn) and (10B,xn) reactions

1979 ◽  
Vol 57 (3) ◽  
pp. 358-367 ◽  
Author(s):  
N. C. Singhal ◽  
M. W. Johns
Keyword(s):  
High Spin ◽  
Internal Conversion ◽  
Gamma Ray ◽  
Angular Distributions ◽  
Spin States ◽  
High Spin States ◽  
Internal Conversion Coefficients ◽  
Conversion Coefficients ◽  
Γ Ray ◽  
Coincidence Measurements

High spin slates in 148Tb have been excited by means of 144Sm(6Li,2n), 144Sm(7Li,3n), and 142Nd(10B,4n) reactions and studied by γ-ray and electron measurements. Gamma-ray singles, excitation functions, angular distributions, internal conversion coefficients, and γ–γ coincidence measurements have been made. A seven-fold gamma–gamma cascade feeding the 9+ isomeric state in 148Tb and originating in a level 4137 keV above that state is strongly excited. The spin and parity assignments are made on the basis of angular distribution and internal conversion coefficients. On the basis of these measurements, the 1006 keV transition is E3 in character; the half-life of the 1006 keV (12−) level is established to be 25 ± 2 ns.These experiments also confirm the existence of a number of high spin states in 148Gd seen by earlier workers.

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