Enhanced Mixing of Intrinsic States in Deformed Hf Nuclei

Authors

E. A. McCutchan
R. F. Casten
V. Werner
E. Williams
R. Winkler
A. Wolf
Z. Berant
G. Gurdal
J. Qian
H. Ai
L. Amon
C. W. Beausang, University of RichmondFollow
D. S. Brenner
R. Cakirli
R. J. Casperson
C. R. Fitzpatrick
D Franks
A. B. Garnsworthy
A. Heinz
R. Luttke
A. F. Mertz
Y. Oktem
N. Pietralla
P. H. Regan
B. Shoraka
J. R. Terry
N. J. Thompson

DOI

10.1103/PhysRevC.77.054304

Abstract

Excited low-spin, nonyrast states in ^170,172,174Hf were populated in β + /∈decay and studied through off-beam γ-ray spectroscopy. New coincidence data allowed for a substantial revision of the level schemes of Hf^170,172 and a confirmation of the level scheme of ¹⁷⁴Hf. The Hf isotopes represent a unique situation in which a crossing of collective intrinsic excitations occurs, enhancing significantly the effects of mixing. Using branching ratios from excited 2⁺ states, this mixing is followed and studied. The resulting mixing matrix elements are found to be ∼30 keV—an order of magnitude larger than estimated previously for nearby nuclei. In the case of ¹⁷⁰Hf, the 2⁺_β and 2⁺_γlevel are shown to be completely mixed.

Document Type

Article

Publication Date

5-2-2008

Publisher Statement

Copyright © 2008 The American Physical Society. This article first appeared in Physical Review C 77, no. 5 (May 2, 2008): 054304: 1-54304: 14. doi:10.1103/PhysRevC.77.054304.

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Recommended Citation

Mccutchan, E., R. Casten, V. Werner, E. Williams, R. Winkler, A. Wolf, Z. Berant, G. Gürdal, J. Qian, H. Ai, L. Amon, C. Beausang, D. Brenner, R. Cakirli, R. Casperson, C. Fitzpatrick, D. Frank, A. Garnsworthy, A. Heinz, R. Lüttke, A. Mertz, Y. Oktem, N. Pietralla, P. Regan, B. Shoraka, J. Terry, and N. Thompson. "Enhanced Mixing of Intrinsic States in Deformed Hf Nuclei." Physical Review C 77, no. 5 (May 2, 2008): 054304: 1-54304: 14. doi:10.1103/PhysRevC.77.054304.