Four quasi-particle excitations and two-phonon vibrational states in spherical nuclei — I

1964 ◽  
Vol 32 (4) ◽  
pp. 991-1014 ◽  
Author(s):  
M. Savoia ◽  
J. Sawicki ◽  
A. Tomasini
Keyword(s):  
Vibrational States ◽  
Quasi Particle ◽  
Spherical Nuclei

SUR L'APPROXIMATION DES BOSONS ET L'ANTISYMÉTRIE

1967 ◽  
Vol 45 (10) ◽  
pp. 3241-3245 ◽  
Author(s):  
P. A. Simard
Keyword(s):  
Ideal Space ◽  
Quasi Particle ◽  
Anharmonic Corrections ◽  
Spherical Nuclei ◽  
Unified Description ◽  
Boson Approximation ◽  
The Ideal

A method is presented in the scheme of the boson approximation such that the antisymmetry between the quasi-particles is introduced naturally. Based on the transcription of the quasi-particle into the ideal space, the method enables one to give a unified description of the anharmonic corrections in the even–even and odd spherical nuclei.

scholarly journals Static Quadrupole Moments of Vibrational States in Spherical Nuclei

1978 ◽  
Vol 59 (3) ◽  
pp. 790-803 ◽  
Author(s):  
G. Watanuki ◽  
Y. Miyanishi ◽  
M. Yasuno
Keyword(s):  
Quadrupole Moments ◽  
Vibrational States ◽  
Spherical Nuclei ◽  
Static Quadrupole

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.

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