Evidence for the Importance of Soft Deformation Potentials in Strongly Deformed Nuclei

Journal Article · Wed Jan 28 00:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3087077· OSTI ID:21255472

Pietralla, N; Bonnet, J; Beller, J; Krugmann, A; Moeller, O ^[1]; Costin, A ^[1]; Ai, H; Casten, R F; Heinz, A; McCutchan, E A; Qian, J; Werner, V ^[2]; Rainovski, G ^[3]; Dusling, K ^[4]

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1. Institut fuer Kernphysik, TU Darmstadt (Germany)
2. WNSL, Yale Univ., New Haven, CT (United States)
3. Faculty of Physics, St. Kliment Ohridski Univ., Sofia (Bulgaria)
4. Nuclear Structure Laboratory, State University of New York, Stony Brook, NY (United States)

Excited states of {sup 168}Hf were populated using the {sup 124}Sn({sup 48}Ti,4n) fusion evaporation reaction at the WNSL of Yale University. The lifetimes of the J{sup {pi}} = 4{sup +},6{sup +},8{sup +}, and 10{sup +} levels along the ground state band of {sup 168}Hf were measured by means of the recoil distance Doppler shift (RDDS) method using the New Yale Plunger Device (NYPD) and the SPEEDY Ge detector array. The new lifetime values are sufficiently precise to clearly prove the increase of quadrupole collectivity as a function of angular momentum in the deformed nucleus {sup 168}Hf. The data agree with the predictions from the geometrical Confined {beta}-Soft (CBS) rotor model that involves centrifugal stretching in a soft potential. Relative and absolute E0 transition strengths [{rho}{sup 2}(E0)] on the transitional path between X(5) and the Rigid Rotor Limit have been evaluated within the framework of the CBS rotor model, too. Relative inter-band E0 transition strengths decrease with increasing angular momentum for a given potential stiffness, while for increasing potential stiffness, the absolute E0 transition strengths decrease with increasing angular momentum and increasing potential stiff0010ne.

• OSTI ID: 21255472
• Journal Information: AIP Conference Proceedings, Vol. 1090, Issue 1; Conference: 13. international symposium on capture gamma-ray spectroscopy and related topics, Cologne (Germany), 25-29 Aug 2008; Other Information: DOI: 10.1063/1.3087077; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
COLLECTIVE MODEL
COLLIDING BEAMS
DEFORMED NUCLEI
DOPPLER EFFECT
E0-TRANSITIONS
EVAPORATION MODEL
EXCITED STATES
GE SEMICONDUCTOR DETECTORS
GROUND STATES
HAFNIUM 168
HEAVY ION FUSION REACTIONS
LIFETIME
NUCLEAR DECAY
POTENTIALS
QUADRUPOLES
TIN 124 TARGET
TITANIUM 48 BEAMS
TITANIUM 48 REACTIONS