Use of radioactive decay for the identification of the excited states of 93- , 91-, and 89- neutron isotopes of dysprosium (in French)
Technical Report
·
OSTI ID:4934287
Thesis. The chain of the 89-, 91-, and 93-neutron isotopes of dysprosium was studied using the radioactive decay of the corresponding holmium isotopes. The chains are: /sup 155/Er(5.3 min) yields /sup 155/Ho(48 min) yields /sup 155/Dy(10.2 h) yields /sup 155/Tb(5.4 d) yields /sup 155/ Gd(stable); /su p 157/Er(5.3 min) yields /sup 157/Ho(12,6 min) yields /sup 157/ Dy(8.1 h) yields /sup 157/Tb(150 a) yields /sup 157/ Gd(stable); /sup 159/Er (36 min) yields /sup 159/Ho(33 min) yields /sup 159/Dy(144 d) yields /sup 159/ Tb(stable). The level schemes were established for /sup 157/Dy and /sup 155/ Dy, and the level scheme of /sup 159/Dy was completed. A systematic comparison of the results obtained with the method to those obtained from (d,p), (d,t) and ( alpha ,xn gamma ) reactions enabled the identification of almost all the excited states observed in the framework of the Nilsson model. Account must be taken of a strong Coriolis interaction in view of explaining the sequence of positive- parity levels. In the case of the 89-neutron isotope (/sup 155/Dy) the Coriolis coupling must be taken into account, between the negative-parity levels 3/2/sup -/ (521), 3/2 /sup-/(532 and 5/2/sup -/(523) and also between the positive-parity levels 1/2/sup +/(660), 3/2/sup +/(651) and 5/2/sup +/(642). (FR)
- Research Organization:
- Paris-11 Univ., 91 - Orsay (France)
- Sponsoring Organization:
- Sponsor not identified
- NSA Number:
- NSA-29-006539
- OSTI ID:
- 4934287
- Report Number(s):
- FRNC-TH--397
- Country of Publication:
- France
- Language:
- French
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Related Subjects
ANGULAR MOMENTUM
BETA-PLUS DECAY
BRANCHING RATIO
COINCIDENCE SPECTROMETRY
CORIOLIS FORCE
COUPLING
DYSPROSIUM 155
DYSPROSIUM 157
DYSPROSIUM 159
ELECTRON CAPTURE DECAY
ELECTRONS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FERMI PLOT
FT VALUE
GAMMA SPECTRA
HALF-LIFE
HOLMIUM 155
HOLMIUM 157
HOLMIUM 159
K CONVERSION COINCIDENCE SPECTROMETRY
L CONVERSION
M CONVERSION
MULTIPOLARITY
N68821 -- Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
150 <= A <= 189-- Radioactive Decay
N68831* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
150 <= A <= 189--Energy Levels & Transitions
NILSSON-MOTTELSON MODEL
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
PARITY
Q-VALUE
ROTATIONAL STATES
SPECTRA
SPIN
BETA-PLUS DECAY
BRANCHING RATIO
COINCIDENCE SPECTROMETRY
CORIOLIS FORCE
COUPLING
DYSPROSIUM 155
DYSPROSIUM 157
DYSPROSIUM 159
ELECTRON CAPTURE DECAY
ELECTRONS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FERMI PLOT
FT VALUE
GAMMA SPECTRA
HALF-LIFE
HOLMIUM 155
HOLMIUM 157
HOLMIUM 159
K CONVERSION COINCIDENCE SPECTROMETRY
L CONVERSION
M CONVERSION
MULTIPOLARITY
N68821 -- Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
150 <= A <= 189-- Radioactive Decay
N68831* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
150 <= A <= 189--Energy Levels & Transitions
NILSSON-MOTTELSON MODEL
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
PARITY
Q-VALUE
ROTATIONAL STATES
SPECTRA
SPIN