Experimental study of the low-lying structure of {sup 94}Zr with the (n,n{sup '}{gamma}) reaction

Journal Article · Mon Dec 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.064303· OSTI ID:21199414

Elhami, E; Orce, J N; Scheck, M; Mukhopadhyay, S; Choudry, S N; McEllistrem, M T ^[1]; Yates, S W ^[1]; Angell, C; Boswell, M; Karwowski, H J ^[2]; Fallin, B; Howell, C R; Hutcheson, A; Parpottas, Y; Tonchev, A P; Tornow, W ^[3]; Kelley, J H ^[3]

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1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)
2. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)
3. Triangle Universities Nuclear Laboratory (TUNL), Durham, North Carolina 27708 (United States)

The low-lying structure of {sub 40}{sup 94}Zr was studied with the (n,n{sup '}{gamma}) reaction, and a level scheme was established based on excitation function and {gamma}{gamma} coincidence measurements. Branching ratios, multipole mixing ratios, and spin assignments were determined from angular distribution measurements. Lifetimes of levels up to 3.4 MeV were measured by the Doppler-shift attenuation method, and for many transitions the reduced transition probabilities were determined. In addition to the anomalous 2{sub 2}{sup +} state, which has a larger B(E2;2{sub 2}{sup +}{yields}0{sub 1}{sup +}) value than the B(E2;2{sub 1}{sup +}{yields}0{sub 1}{sup +}), the experimental results revealed interesting and unusual properties of the low-lying states in {sup 94}Zr. In a simple interpretation, the excited states are classified in two distinct categories, i.e., those populating the 2{sub 2}{sup +} state and those decaying to the 2{sub 1}{sup +} state.

• OSTI ID: 21199414
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 78; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALLOCATIONS
ANGULAR DISTRIBUTION
BRANCHING RATIO
DSA METHOD
EXCITATION FUNCTIONS
EXCITED STATES
GAMMA DECAY
LIFETIME
MEV RANGE 01-10
MIXING RATIO
NEUTRONS
NUCLEAR REACTIONS
PROBABILITY
SPIN
ZIRCONIUM 94