Anomalous behavior of the 2{sup +} mixed-symmetry state in {sup 94}Zr

Journal Article · Mon Jan 15 04:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.011301· OSTI ID:20990923

Elhami, E; Orce, J N; Mukhopadhyay, S; Choudry, S N; Scheck, M; McEllistrem, M T ^[1]; Yates, S W ^[1]

---

1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)

The low-spin structure of {sup 94}Zr has been studied with the (n,n{sup '}{gamma}) reaction, and branching ratios, lifetimes, multipolarities and spin assignments were determined. The 2{sub 2}{sup +} state at 1671.4 keV has been identified as the lowest mixed-symmetry state in {sup 94}Zr. The 752.5-keV transition from this state to the 2{sub 1}{sup +} level has a large B(M1) value of 0.33(5) {mu}{sub N}{sup 2}, 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;2{sub 1,MS}{sup +}{yields}0{sub 1}{sup +}) value significantly exceeds the E2 strength predicted by the IBM-2. For the first time, the 2{sub 1,MS}{sup +}{yields}0{sub 1}{sup +}E2 transition is observed to have a larger E2 transition strength than the 2{sub 1}{sup +}{yields}0{sub 1}{sup +} decay.

• OSTI ID: 20990923
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
E2-TRANSITIONS
GROUND STATES
KEV RANGE
M1-TRANSITIONS
MASS NUMBER
SPIN
SYMMETRY
VIBRATIONAL STATES
ZIRCONIUM 94