Probing the Collective Degrees of Freedom at the Proton Drip Line in the Extremely Neutron Deficient {sup 172}Hg
- Department of Physics, University of Jyvaeskylae, FIN-40014 Jyvaeskylae (Finland)
- Department of Physics, Royal Institute of Technology, S-10691 Stockholm (Sweden)
Excited states in the extremely neutron-deficient isotope {sup 172}Hg have been established for the first time. The {sup 96}Ru({sup 78}Kr,2n) reaction was employed to populate excited states in {sup 172}Hg with a cross section {sigma}{approx_equal} 15 nb. The highly selective Recoil-Decay Tagging (RDT) technique was used to obtain clean in-beam {gamma}-ray spectra for {sup 172}Hg. The yrast ground-state band has tentatively been established up to I = 6h-bar. The data have been interpreted within the framework of total Routhian surface and quasiparticle random phase approximation calculations. In addition to the well-known features of shape coexistence previously observed in light Hg isotopes, the systematic trends in the energy of the yrast 2{sup +} and 4{sup +} states in the chain of Hg isotopes indicate a pronounced vibrational collectivity which is reduced in strength, but at the same time shows a higher degree of harmonicity, as the neutron number decreases below the neutron midshell.
- OSTI ID:
- 22003883
- Journal Information:
- AIP Conference Proceedings, Vol. 1409, Issue 1; Conference: 4. international conference on proton emitting nuclei and related topics, Bordeaux (France), 6-10 Jun 2011; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CROSS SECTIONS
DEGREES OF FREEDOM
EXCITED STATES
GROUND STATES
HEAVY ION REACTIONS
HYDROGEN 6
IN-BEAM SPECTROSCOPY
KRYPTON 78
MERCURY 172
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
NUCLEAR STRUCTURE
PROTONS
QUASI PARTICLES
RANDOM PHASE APPROXIMATION
RECOILS
RUTHENIUM 96
YRAST STATES