Anomalous behavior of the 2(+) mixed-symmetry state in Zr-94

E. Elhami; J.N. Orce; S. Mukhopadhyay; S.N. Choudry; M. Scheck; M.T. McEllistrem; S.W. Yates

doi:10.1103/PhysRevC.75.011301

Anomalous behavior of the 2(+) mixed-symmetry state in Zr-94

E. Elhami, J.N. Orce, S. Mukhopadhyay, S.N. Choudry, M. Scheck, M.T. McEllistrem, S.W. Yates

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

The low-spin structure of 94Zr has been studied with the (n,n'γ) reaction, and branching ratios, lifetimes, multipolarities and spin assignments were determined. The 22+ state at 1671.4 keV has been identified as the lowest mixed-symmetry state in 94Zr. The 752.5-keV transition from this state to the 21+ level has a large B(M1) value of 0.33(5) μN2, and the B(E2) of the transition to the ground state has an unusually large value of 8(1) W.u. The M1 transition strength is in agreement with IBM-2 predictions in the U(5) vibrational limit, whereas the large B(E2;21,MS+→01+) value significantly exceeds the E2 strength predicted by the IBM-2. For the first time, the 21,MS+→01+E2 transition is observed to have a larger E2 transition strength than the 21+→01+ decay

Original language	English
Article number	011301
Journal	Physical Review C
Volume	75
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.75.011301
Publication status	Published - 20 Aug 2013
Externally published	Yes

Keywords

BRANCHING RATIO
E2-TRANSITIONS
GROUND STATES
KEV RANGE
M1-TRANSITIONS
MASS NUMBER
SPIN
SYMMETRY
VIBRATIONAL STATES
ZIRCONIUM 94
ANGULAR MOMENTUM
DIMENSIONLESS NUMBERS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITED STATES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MULTIPOLE TRANSITIONS
NUCLEI
PARTICLE PROPERTIES
STABLE ISOTOPES
ZIRCONIUM ISOTOPES

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10.1103/PhysRevC.75.011301

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title = "Anomalous behavior of the 2(+) mixed-symmetry state in Zr-94",

abstract = "The low-spin structure of 94Zr has been studied with the (n,n'γ) reaction, and branching ratios, lifetimes, multipolarities and spin assignments were determined. The 22+ state at 1671.4 keV has been identified as the lowest mixed-symmetry state in 94Zr. The 752.5-keV transition from this state to the 21+ level has a large B(M1) value of 0.33(5) μN2, and the B(E2) of the transition to the ground state has an unusually large value of 8(1) W.u. The M1 transition strength is in agreement with IBM-2 predictions in the U(5) vibrational limit, whereas the large B(E2;21,MS+→01+) value significantly exceeds the E2 strength predicted by the IBM-2. For the first time, the 21,MS+→01+E2 transition is observed to have a larger E2 transition strength than the 21+→01+ decay",

keywords = "BRANCHING RATIO, E2-TRANSITIONS, GROUND STATES, KEV RANGE, M1-TRANSITIONS, MASS NUMBER, SPIN, SYMMETRY, VIBRATIONAL STATES, ZIRCONIUM 94, ANGULAR MOMENTUM, DIMENSIONLESS NUMBERS, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, EXCITED STATES, INTERMEDIATE MASS NUCLEI, ISOTOPES, MULTIPOLE TRANSITIONS, NUCLEI, PARTICLE PROPERTIES, STABLE ISOTOPES, ZIRCONIUM ISOTOPES",

author = "E. Elhami and J.N. Orce and S. Mukhopadhyay and S.N. Choudry and M. Scheck and M.T. McEllistrem and S.W. Yates",

year = "2013",

month = aug,

day = "20",

doi = "10.1103/PhysRevC.75.011301",

language = "English",

volume = "75",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

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T1 - Anomalous behavior of the 2(+) mixed-symmetry state in Zr-94

AU - Elhami, E.

AU - Orce, J.N.

AU - Mukhopadhyay, S.

AU - Choudry, S.N.

AU - Scheck, M.

AU - McEllistrem, M.T.

AU - Yates, S.W.

PY - 2013/8/20

Y1 - 2013/8/20

N2 - The low-spin structure of 94Zr has been studied with the (n,n'γ) reaction, and branching ratios, lifetimes, multipolarities and spin assignments were determined. The 22+ state at 1671.4 keV has been identified as the lowest mixed-symmetry state in 94Zr. The 752.5-keV transition from this state to the 21+ level has a large B(M1) value of 0.33(5) μN2, and the B(E2) of the transition to the ground state has an unusually large value of 8(1) W.u. The M1 transition strength is in agreement with IBM-2 predictions in the U(5) vibrational limit, whereas the large B(E2;21,MS+→01+) value significantly exceeds the E2 strength predicted by the IBM-2. For the first time, the 21,MS+→01+E2 transition is observed to have a larger E2 transition strength than the 21+→01+ decay

AB - The low-spin structure of 94Zr has been studied with the (n,n'γ) reaction, and branching ratios, lifetimes, multipolarities and spin assignments were determined. The 22+ state at 1671.4 keV has been identified as the lowest mixed-symmetry state in 94Zr. The 752.5-keV transition from this state to the 21+ level has a large B(M1) value of 0.33(5) μN2, and the B(E2) of the transition to the ground state has an unusually large value of 8(1) W.u. The M1 transition strength is in agreement with IBM-2 predictions in the U(5) vibrational limit, whereas the large B(E2;21,MS+→01+) value significantly exceeds the E2 strength predicted by the IBM-2. For the first time, the 21,MS+→01+E2 transition is observed to have a larger E2 transition strength than the 21+→01+ decay

KW - BRANCHING RATIO

KW - E2-TRANSITIONS

KW - GROUND STATES

KW - KEV RANGE

KW - M1-TRANSITIONS

KW - MASS NUMBER

KW - SPIN

KW - SYMMETRY

KW - VIBRATIONAL STATES

KW - ZIRCONIUM 94

KW - ANGULAR MOMENTUM

KW - DIMENSIONLESS NUMBERS

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KW - ENERGY RANGE

KW - ENERGY-LEVEL TRANSITIONS

KW - EVEN-EVEN NUCLEI

KW - EXCITED STATES

KW - INTERMEDIATE MASS NUCLEI

KW - ISOTOPES

KW - MULTIPOLE TRANSITIONS

KW - NUCLEI

KW - PARTICLE PROPERTIES

KW - STABLE ISOTOPES

KW - ZIRCONIUM ISOTOPES

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DO - 10.1103/PhysRevC.75.011301

M3 - Article

SN - 2469-9985

VL - 75

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 011301

ER -

Anomalous behavior of the 2(+) mixed-symmetry state in Zr-94

Abstract

Keywords

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