Evidence for [gamma] vibrations and shape evolutions through the transitional [sup 184,186,188,190]Hg nuclei
- Commissariat a l'Energie Atomique, Service de Physique et Techniques Nucleaires, Boite Postale 12, 91680 Bruyeres-le-Chatel (France)
- Institut National de Physique Nucleaire et de Physique des Particules, Centre National de la Recherche Scientifique, Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, 91405 Orsay (France)
- Institut National de Physique Nucleaire et de Physique des Particules, Centre National de la Recherche Scientifique, Institut de Physique Nucleaire, 91406 Orsay (France)
Constrained Hartree-Fock-Bogoliubov calculations based on Gogny's force have been performed to determine the potential energy surfaces, collective masses, and moments of inertia used to build a five-dimension collective Hamiltonian treating quadrupole motion in the [sup 184,186,188,190]Hg isotopes. Many collective states have been predicted at low excitation energy, some of them forming [gamma]-vibrational bands. To expand experimental information on [gamma] bands, high statistics measurements on the [beta][sup +] and electron capture decay of [sup 190]Tl[sup [ital g],][ital m] and [sup 186]Tl[sup [ital g],][ital m] have been performed at the ISOCELE facility. For the first time, [gamma] bands have been identified in [sup 190]Hg and [sup 186]Hg. These new results together with previous experimental information available on the ground state and [ital K]=0 excited bands in [sup 184,186,188,190]Hg form a database which has been analyzed and discussed in the present theoretical framework. It is argued that the first [ital K]=0 excited band in [sup 190]Hg is a [beta]-vibrational band, and that [sup 186]Hg is a nucleus in which shape coexistence occurs not only for the [ital K]=0 bands but also for the [gamma] bands.
- OSTI ID:
- 6905290
- Journal Information:
- Physical Review, C (Nuclear Physics); (United States), Vol. 50:5; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MERCURY 184
VIBRATIONAL STATES
MERCURY 186
MERCURY 188
MERCURY 190
THALLIUM 186
ELECTRON CAPTURE DECAY
THALLIUM 190
BETA-PLUS DECAY
COLLECTIVE EXCITATIONS
E2-TRANSITIONS
EXCITATION
GAMMA SPECTROSCOPY
HARTREE-FOCK METHOD
MOMENT OF INERTIA
ALPHA DECAY RADIOISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCULATION METHODS
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITED STATES
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MERCURY ISOTOPES
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NUCLEAR DECAY
NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTROSCOPY
THALLIUM ISOTOPES
663110* - General & Average Properties of Nuclei & Nuclear Energy Levels- (1992-)
663120 - Nuclear Structure Models & Methods- (1992-)
663220 - Electromagnetic Transitions- (1992-)