scholarly journals Evidence for tetrahedral structure of Calcium-40

2020 ◽  
Vol 29 (04) ◽  
pp. 2050018
Author(s):  
N. S. Manton
Keyword(s):  
Excited States ◽  
High Spin ◽  
Vibrational Frequency ◽  
Spin States ◽  
Tetrahedral Structure ◽  
Rotational Bands ◽  
High Spin States ◽  
Vibrational Bands ◽  
Almost All

More than 100 excited states of the Calcium-40 nucleus, with isospin 0, are classified into rotational–vibrational bands of an intrinsic tetrahedral structure. Almost all observed states below 8[Formula: see text]MeV can be accommodated, as well as many high-spin states above 8[Formula: see text]MeV. The bands have some similarity to those classifying states of Oxygen-16, but the A-mode vibrational frequency is lower relative to the E-mode and F-mode frequencies than in Oxygen-16. Previously identified rotational bands up to spin 16 and energy above 20[Formula: see text]MeV are unified here into a smaller number of tetrahedral bands.

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.

π-Topology and spin alignment in the photo-excited states of phenylanthracene-t-butylnitroxide radicals

2015 ◽  
Vol 17 (47) ◽  
pp. 31646-31652 ◽  
Author(s):  
Yoshio Teki ◽  
Sadaharu Miyamoto ◽  
Kentaro Koide
Keyword(s):  
Excited States ◽  
High Spin ◽  
Transient Absorption ◽  
Spin Systems ◽  
Spin States ◽  
Spin Alignment ◽  
Time Resolved ◽  
High Spin States ◽  
The Relationship

We have studied the relationship between the π-topology and the photo-excited high-spin states of π-conjugated spin systems, 9-anthracen-(3-phenyl-t-butylnitroxide) radical (1m) and 9-anthracen-(4-phenyl-t-butylnitroxide) radical (1p) systems, by time-resolved ESR and transient absorption spectroscopies.

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

High spin states inNd153and first identification of excited states inNd155

2008 ◽  
Vol 78 (1) ◽  
Author(s):  
J. K. Hwang ◽  
A. V. Ramayya ◽  
J. H. Hamilton ◽  
K. Li ◽  
C. Goodin ◽  
...  
Keyword(s):  
Excited States ◽  
High Spin ◽  
Spin States ◽  
High Spin States

SEARCH FOR TWO-PHONON OCTUPOLE VIBRATIONAL BANDS IN 88, 89, 92, 93, 94, 96Sr AND 95, 96, 97, 98Zr

2012 ◽  
Vol 21 (09) ◽  
pp. 1250080 ◽  
Author(s):  
J. K. HWANG ◽  
J. H. HAMILTON ◽  
A. V. RAMAYYA ◽  
N. T. BREWER ◽  
E. H. WANG ◽  
...  
Keyword(s):  
High Spin ◽  
Vibrational Band ◽  
Spin States ◽  
Vibrational States ◽  
High Spin States ◽  
Weakly Coupled ◽  
Vibrational Bands ◽  
Spherical Nuclei ◽  
Gamma Transitions ◽  
First Time

Several new gamma transitions were identified in 94 Sr , 93 Sr , 92 Sr , 96 Zr and 97 Zr from the spontaneous fission of 252 Cf . Excited states in 88, 89, 92, 94, 96 Sr and 95, 96, 97, 98 Zr were reanalyzed and reorganized to propose the new two-phonon octupole vibrational states and bands. The spin and parity of 6+ are assigned to a 4034.5 keV state in 94 Sr and 3576.4 keV state in 98 Zr . These states are proposed as the two-phonon octupole vibrational states along with the 6+ states at 3483.4 keV in 96 Zr , at 3786.0 keV in 92 Sr and 3604.2 keV in 96 Sr . The positive parity bands in 88, 94, 96 Sr and 96, 98 Zr are the first two-phonon octupole vibrational bands based on a 6+ state assigned in spherical nuclei. It is thought that in 94, 96 Sr and 96, 98 Zr a 3- octupole vibrational phonon is weakly coupled to an one-phonon octupole vibrational band to make the two-phonon octupole vibrational band. Also, the high spin states of odd-A95 Zr and 97 Zr are interpreted to be generated by the neutron 2d5/2 hole and neutron 1g7/2 particle, respectively, weakly coupled to one- and two-phonon octupole vibrational bands of 96 Zr . The high spin states of odd-A87 Sr are interpreted to be caused by the neutron 1g9/2 hole weakly coupled to 3- and 5- states of 88 Sr . New one- and two-POV bands in 95, 97 Zr and 87, 89 Sr are proposed, for the first time, in the present work.

IDENTIFICATION OF HIGH-SPIN STATES IN NEUTRON-RICH 88,90,92Kr AND 86Se

2011 ◽  
Vol 20 (08) ◽  
pp. 1825-1832 ◽  
Author(s):  
K. LI ◽  
J. H. HAMILTON ◽  
A. V. RAMAYYA ◽  
S. H. LIU ◽  
X. Q. ZHANG ◽  
...  
Keyword(s):  
Angular Correlation ◽  
Excited States ◽  
High Spin ◽  
Level Scheme ◽  
Spontaneous Fission ◽  
Detector Array ◽  
Spin States ◽  
High Spin States ◽  
Coincidence Data

Level schemes of even–even neutron-rich 88-92 Kr and 86 Se have been investigated by measuring triple-γ coincidence data from the spontaneous fission of 252 Cf with the Gammasphere detector array. The level scheme of 88 Kr has been extended up to 7169 keV state. Several new excited states with new transitions have been identified in 90,92 Kr and 86 Se . Spins and parities have been assigned to levels in these nuclei by following regional systematics and angular correlation measurements. The level structures of the N = 52, 54, Se , Kr , and Sr isotones are discussed.

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.

ROTATIONALLY SINGLE-PARTICLE AND VIBRATIONAL EXCITED STATES OF DEFORMABLE ODD NUCLEI WITH SMALL NONAXIALITY

2003 ◽  
Vol 12 (01) ◽  
pp. 41-58 ◽  
Author(s):  
SH. SHARIPOV ◽  
M. J. ERMAMATOV
Keyword(s):  
Excited States ◽  
High Spin ◽  
Single Particle ◽  
Spin States ◽  
Quadrupole Moments ◽  
Excitation Energies ◽  
High Spin States ◽  
Vibrational Excitations

Rotationally single-particle and vibrational excitations of deformable odd nuclei with small nonaxiality are investigated with allowance for the interaction of collective and single-particle states. The ratios of excitation energies, of reduced probabilities of E2 transitions, and of quadrupole moments for deformable odd nuclei with small nonaxiality are calculated up to high-spin states.

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