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.

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.

A study of high spin states in 151Gd

1977 ◽  
Vol 55 (7-8) ◽  
pp. 690-713 ◽  
Author(s):  
H. J. Smith ◽  
M. W. Johns ◽  
G. Løvhøiden ◽  
J. V. Thompson ◽  
J. C. Waddington ◽  
...  
Keyword(s):  
Band Structure ◽  
Rotational Band ◽  
Gamma Ray ◽  
Level Structure ◽  
Negative Parity ◽  
Angular Distributions ◽  
Spin States ◽  
High Spin States ◽  
Conversion Coefficients ◽  
Coincidence Measurements

States in the transitional nucleus, 151Gd, excited by the (α,2n) reaction have been studied by gamma-ray and conversion electron measurements. Gamma-ray energies, intensities, excitation functions, and γ–γ coincidence measurements were used to establish the levels populated. Angular distributions involving measurements at seven angles from 0° to 90° and K-conversion coefficients have been used to make spin and parity assignments.The El character of the 65, 79, 340, 358, 406, and 462 keV transitions, which in the absence of K-conversion data had been tacitly assumed to be M1 by earlier workers leads to a significant revision of their parity assignments and interpretation of the level structure. The negative parity states at 1210, 1463, 1726, 2004, 2295, 2600, 2915, and 3237 keV form a well-developed rotational band based on the 11/2− [505] state at 1210 keV. The properties of this band in this nucleus are compared with those of the same band in a number of nearby nuclei. Two non-interacting negative parity bands with states at 0(7/2−), 706(11/2−), 1435(15/2−), 2078(19/2−), and 379(9/2−), 902(13/2−), 1511(17/2−), 2297(21/2−), respectively, have been found, as well as a number of other negative parity states of spin 7/2, 9/2, and 13/2. A complex positive band structure involving states at 784(11/2+), 852(13/2+), 1116(13/2+), 1346(17/2+), 1364(15/2+), 1677(17/2+), 1851(19/2+), 1853(21/2+), 2197(21/2+), 2325(23/2+), and 2405(25/2+) has been identified. By using a somewhat unusual set of parameters, we have been able to approach a description for the positive parity states in terms of the triaxial model of Meyer-ter-Vehn.

scholarly journals High Spin States in 193Hg

2020 ◽  
Vol 4 ◽  
pp. 170
Author(s):  
N. Fotiades ◽  
Et al.
Keyword(s):  
Excited States ◽  
High Spin ◽  
Normal Level ◽  
Beam Energy ◽  
Spin Structure ◽  
Spin States ◽  
Tandem Accelerator ◽  
High Spin States ◽  
Γ Rays ◽  
Γ Ray

The high-spin structure of 193Hg was investigated by in-beam γ-ray spectro­scopic techniques. The tandem accelerator at Daresbury Laboratory, U. K., was used to populate excited states of 193Hg through the reaction 150Nd(48Ca,5n)193Hg at a beam energy of 213 MeV and the EUROGAM detector array was used to de­ tect the γ-rays emitted by the deexciting nuclei. The normal level scheme has been further extended and a new band has been observed. In addition two new ΔI=1 structures of competing dipole and quadrupole transitions were found which will be discussed in detail.

Gamma-ray spectroscopic studies on high-spin states inAs71andAs73using heavy-ion reactions

1977 ◽  
Vol 15 (5) ◽  
pp. 1742-1757 ◽  
Author(s):  
B. Heits ◽  
H. -G. Friederichs ◽  
A. Rademacher ◽  
K. O. Zell ◽  
P. von Brentano ◽  
...  
Keyword(s):  
High Spin ◽  
Gamma Ray ◽  
Heavy Ion ◽  
Spectroscopic Studies ◽  
Spin States ◽  
Heavy Ion Reactions ◽  
High Spin States

Gamma-Ray Spectroscopy inA≅40Nuclei via Heavy-Ion-Induced Reactions: High-Spin States inK41andCa41

1973 ◽  
Vol 31 (17) ◽  
pp. 1067-1070 ◽  
Author(s):  
P. Gorodetzky ◽  
J. J. Kolata ◽  
J. W. Olness ◽  
A. R. Poletti ◽  
E. K. Warburton
Keyword(s):  
High Spin ◽  
Gamma Ray ◽  
Heavy Ion ◽  
Spin States ◽  
High Spin States ◽  
Gamma Ray Spectroscopy

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.

Quasiparticle Driving Effect on Shape of 87Nb Soft Nucleus

1997 ◽  
Vol 06 (01) ◽  
pp. 177-189 ◽  
Author(s):  
S. Wen ◽  
H. Zheng ◽  
L. K. Zhang ◽  
S. G. Li ◽  
P. K. Weng ◽  
...  
Keyword(s):  
Excitation Energy ◽  
High Spin ◽  
Beam Energy ◽  
Nuclear Shape ◽  
Angular Distributions ◽  
Spin States ◽  
Excitation Functions ◽  
High Spin States ◽  
Γ Rays

The high spin states of 87 Nb have been studied by using the 58 Ni (32 S , 3p)87 Nb reaction at beam energy 95–105 MeV and the reaction 58 Ni (35 Cl , 2pα) at 124 MeV. γ-γ coincidence relations, angular distributions of γ-rays, excitation functions and DCO ratios were measured. High spin states in 87 Nb have been established up to spin of 37/2ℏ and excitation energy of 7 MeV. CSM calculation was carried out with parameters of configuration dependence of nuclear shape. The nature and configuration of every band in 87 Nb are discussed.

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