Yrast isomers in exotic [ital N]=81 nucleus [sup 151]Yb studied using a fragment mass analyzer

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.1929· OSTI ID:6607934

Nisius, D; Fornal, B; Bearden, I G; Broda, R; Mayer, R H; Grabowski, Z W; Daly, P J ^[1]; Davids, C N; Ahmad, I; Back, B B; Bindra, K; Carpenter, M P; Chung, W; Henderson, D; Henry, R G; Janssens, R V.F.; Khoo, T L; Lauritsen, T; Liang, Y; Soramel, F ^[2] ; Ramayya, A V ^[3]

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1. Purdue University, West Lafayette, Indiana 47907 (United States)
2. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Vanderbilt University, Nashville, Tennessee 37235 (United States)

Product recoils from the reaction [sup 96]Ru +255 MeV [sup 58]Ni [r arrow] [sup 154]Hf[sup *] were analyzed using the Argonne Fragment Mass Analyzer and transported to a collector foil behind the focal plane, where decay of [mu]s isomers could be studied under low background conditions. The recoils were dispersed in [ital A]/[ital q] as they traversed the position-sensitive focal-plane detector, and recoil--[gamma]-ray coincidences could thus be used to assign masses for specific [gamma]-ray cascades. By use of these methods, yrast isomers with half-lives of 2.6(7) [mu]s and 20(1) [mu]s have been firmly assigned to the exotic [ital N]=81 nucleus [sup 151]Yb, and the main features of the isomeric decays have been established. The yrast level structure of [sup 151]Yb and lighter [ital N]=81 isotones are compared.

• DOE Contract Number: FG02-87ER40346; W-31109-ENG-38
• OSTI ID: 6607934
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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663540 -- Nuclear Mass Ranges-- A=39-58-- (1992-)
663570 -- Nuclear Mass Ranges-- A=150-189-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COUNTING TECHNIQUES
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
GAMMA CASCADES
GAMMA RADIATION
HAFNIUM 154
HAFNIUM ISOTOPES
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LIFETIME
MEV RANGE
MEV RANGE 100-1000
NICKEL 58 REACTIONS
NUCLEAR CASCADES
NUCLEAR REACTIONS
NUCLEI
PARTICLES
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RUTHENIUM 96 TARGET
SECONDS LIVING RADIOISOTOPES
TARGETS
YRAST STATES
YTTERBIUM 151
YTTERBIUM ISOTOPES