Enhanced mixing of intrinsic states in deformed Hf nuclei

E. A. McCutchan; R. F. Casten; V. Werner; E. Williams; R. Winkler; A. Wolf; Z. Berant; G. Gürdal; J. Qian; H. Ai; L. Amon; C. W. Beausang; D. S. Brenner; R. B. Cakirli; R. J. Casperson; C. R. Fitzpatrick; D. Frank; A. B. Garnsworthy; A. Heinz; R. Lüttke; A. F. Mertz; Y. Oktem; N. Pietralla; P. H. Regan; B. Shoraka; J. R. Terry; N. J. Thompson

doi:10.1103/PhysRevC.77.054304

Enhanced mixing of intrinsic states in deformed Hf nuclei

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

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Abstract

Excited low-spin, nonyrast states in Hf170,172,174 were populated in β+/ε decay and studied through off-beam γ-ray spectroscopy. New coincidence data allowed for a substantial revision of the level schemes of Hf170,172 and a confirmation of the level scheme of Hf174. 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 Hf170, the 2β+ and 2γ+ level are shown to be completely mixed.

Original language	English
Article number	054304
Journal	Physical Review C - Nuclear Physics
Volume	77
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.77.054304
Publication status	Published - 2 May 2008
Externally published	Yes

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McCutchan, E. A., Casten, R. F., Werner, V., Williams, E., Winkler, R., Wolf, A., Berant, Z., Gürdal, G., Qian, J., Ai, H., Amon, L., Beausang, C. W., Brenner, D. S., Cakirli, R. B., Casperson, R. J., Fitzpatrick, C. R., Frank, D., Garnsworthy, A. B., Heinz, A., ... Thompson, N. J. (2008). Enhanced mixing of intrinsic states in deformed Hf nuclei. Physical Review C - Nuclear Physics, 77(5), Article 054304. https://doi.org/10.1103/PhysRevC.77.054304

@article{bb623533f8464dbd8382396cfc8ec31c,

title = "Enhanced mixing of intrinsic states in deformed Hf nuclei",

abstract = "Excited low-spin, nonyrast states in Hf170,172,174 were populated in β+/ε decay and studied through off-beam γ-ray spectroscopy. New coincidence data allowed for a substantial revision of the level schemes of Hf170,172 and a confirmation of the level scheme of Hf174. 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 Hf170, the 2β+ and 2γ+ level are shown to be completely mixed.",

author = "McCutchan, {E. A.} and Casten, {R. F.} and V. Werner and E. Williams and R. Winkler and A. Wolf and Z. Berant and G. G{\"u}rdal and J. Qian and H. Ai and L. Amon and Beausang, {C. W.} and Brenner, {D. S.} and Cakirli, {R. B.} and Casperson, {R. J.} and Fitzpatrick, {C. R.} and D. Frank and Garnsworthy, {A. B.} and A. Heinz and R. L{\"u}ttke and Mertz, {A. F.} and Y. Oktem and N. Pietralla and Regan, {P. H.} and B. Shoraka and Terry, {J. R.} and Thompson, {N. J.}",

year = "2008",

month = may,

day = "2",

doi = "10.1103/PhysRevC.77.054304",

language = "English",

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issn = "0556-2813",

publisher = "American Physical Society",

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McCutchan, EA, Casten, RF, Werner, V, Williams, E, Winkler, R, Wolf, A, Berant, Z, Gürdal, G, Qian, J, Ai, H, Amon, L, Beausang, CW, Brenner, DS, Cakirli, RB, Casperson, RJ, Fitzpatrick, CR, Frank, D, Garnsworthy, AB, Heinz, A, Lüttke, R, Mertz, AF, Oktem, Y, Pietralla, N, Regan, PH, Shoraka, B, Terry, JR & Thompson, NJ 2008, 'Enhanced mixing of intrinsic states in deformed Hf nuclei', Physical Review C - Nuclear Physics, vol. 77, no. 5, 054304. https://doi.org/10.1103/PhysRevC.77.054304

TY - JOUR

T1 - Enhanced mixing of intrinsic states in deformed Hf nuclei

AU - McCutchan, E. A.

AU - Casten, R. F.

AU - Werner, V.

AU - Williams, E.

AU - Winkler, R.

AU - Wolf, A.

AU - Berant, Z.

AU - Gürdal, G.

AU - Qian, J.

AU - Ai, H.

AU - Amon, L.

AU - Beausang, C. W.

AU - Brenner, D. S.

AU - Cakirli, R. B.

AU - Casperson, R. J.

AU - Fitzpatrick, C. R.

AU - Frank, D.

AU - Garnsworthy, A. B.

AU - Heinz, A.

AU - Lüttke, R.

AU - Mertz, A. F.

AU - Oktem, Y.

AU - Pietralla, N.

AU - Regan, P. H.

AU - Shoraka, B.

AU - Terry, J. R.

AU - Thompson, N. J.

PY - 2008/5/2

Y1 - 2008/5/2

N2 - Excited low-spin, nonyrast states in Hf170,172,174 were populated in β+/ε decay and studied through off-beam γ-ray spectroscopy. New coincidence data allowed for a substantial revision of the level schemes of Hf170,172 and a confirmation of the level scheme of Hf174. 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 Hf170, the 2β+ and 2γ+ level are shown to be completely mixed.

AB - Excited low-spin, nonyrast states in Hf170,172,174 were populated in β+/ε decay and studied through off-beam γ-ray spectroscopy. New coincidence data allowed for a substantial revision of the level schemes of Hf170,172 and a confirmation of the level scheme of Hf174. 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 Hf170, the 2β+ and 2γ+ level are shown to be completely mixed.

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U2 - 10.1103/PhysRevC.77.054304

DO - 10.1103/PhysRevC.77.054304

M3 - Article

SN - 0556-2813

VL - 77

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 5

M1 - 054304

ER -

Enhanced mixing of intrinsic states in deformed Hf nuclei

Abstract

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