Evidence for [gamma] vibrations and shape evolutions through the transitional [sup 184,186,188,190]Hg nuclei

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.2332· OSTI ID:6905290

Delaroche, J P; Girod, M ^[1]; Bastin, G; Deloncle, I; Hannachi, F; Libert, J; Porquet, M G ^[2]; Bourgeois, C; Hojman, D; Kilcher, P; Korichi, A; Le Blanc, F; Perrin, N; Roussiere, B; Sauvage, J; Sergolle, H ^[3]

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1. Commissariat a l'Energie Atomique, Service de Physique et Techniques Nucleaires, Boite Postale 12, 91680 Bruyeres-le-Chatel (France)
2. 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)
3. 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), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663120 -- Nuclear Structure Models & Methods-- (1992-)
663220 -- Electromagnetic Transitions-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
CALCULATION METHODS
COLLECTIVE EXCITATIONS
DECAY
E2-TRANSITIONS
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
EXCITED STATES
GAMMA SPECTROSCOPY
HARTREE-FOCK METHOD
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MERCURY 184
MERCURY 186
MERCURY 188
MERCURY 190
MERCURY ISOTOPES
MINUTES LIVING RADIOISOTOPES
MOMENT OF INERTIA
MULTIPOLE TRANSITIONS
NUCLEAR DECAY
NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTROSCOPY
THALLIUM 186
THALLIUM 190
THALLIUM ISOTOPES
VIBRATIONAL STATES