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

Abstract

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.

Authors:
; ; ; ;  [1];  [1]; ; ; ; ; ;  [2];  [3];  [4]
  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)
Publication Date:
OSTI Identifier:
21255472
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1090; Journal 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); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Pietralla, N, Bonnet, J, Beller, J, Krugmann, A, Moeller, O, Costin, A, Nuclear Structure Laboratory, State University of New York, Stony Brook, NY, Ai, H, Casten, R F, Heinz, A, McCutchan, E A, Qian, J, Werner, V, Rainovski, G, and Dusling, K. Evidence for the Importance of Soft Deformation Potentials in Strongly Deformed Nuclei. United States: N. p., 2009. Web. doi:10.1063/1.3087077.
Pietralla, N, Bonnet, J, Beller, J, Krugmann, A, Moeller, O, Costin, A, Nuclear Structure Laboratory, State University of New York, Stony Brook, NY, Ai, H, Casten, R F, Heinz, A, McCutchan, E A, Qian, J, Werner, V, Rainovski, G, & Dusling, K. Evidence for the Importance of Soft Deformation Potentials in Strongly Deformed Nuclei. United States. https://doi.org/10.1063/1.3087077
Pietralla, N, Bonnet, J, Beller, J, Krugmann, A, Moeller, O, Costin, A, Nuclear Structure Laboratory, State University of New York, Stony Brook, NY, Ai, H, Casten, R F, Heinz, A, McCutchan, E A, Qian, J, Werner, V, Rainovski, G, and Dusling, K. 2009. "Evidence for the Importance of Soft Deformation Potentials in Strongly Deformed Nuclei". United States. https://doi.org/10.1063/1.3087077.
@article{osti_21255472,
title = {Evidence for the Importance of Soft Deformation Potentials in Strongly Deformed Nuclei},
author = {Pietralla, N and Bonnet, J and Beller, J and Krugmann, A and Moeller, O and Costin, A and Nuclear Structure Laboratory, State University of New York, Stony Brook, NY and Ai, H and Casten, R F and Heinz, A and McCutchan, E A and Qian, J and Werner, V and Rainovski, G and Dusling, K},
abstractNote = {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.},
doi = {10.1063/1.3087077},
url = {https://www.osti.gov/biblio/21255472}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1090,
place = {United States},
year = {Wed Jan 28 00:00:00 EST 2009},
month = {Wed Jan 28 00:00:00 EST 2009}
}