Coexistence features in the spherical-deformed A approx 100 transition region: Picosecond lifetime measurements in sup 97 Sr, sup 97 Y, and sup 97 Zr

Journal Article · Wed Feb 28 23:00:00 EST 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.1115· OSTI ID:6964593

Buescher, M ^[1]; Casten, R F; Gill, R L ^[2]; Schuhmann, R ^[3]; Winger, J A ^[4]; Mach, H ^[2]; Moszynski, M ^[5]; Sistemich, K ^[6]

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1. Brookhaven National Laboratory, Upton, New York 11973 (USA) Institut fuer Kernphysik, Kernforschungsanlage Juelich G.m.b.H., D-5170 Juelich, Federal Republic of Germany
2. Brookhaven National Laboratory, Upton, New York 11973 (USA)
3. Brookhaven National Laboratory, Upton, New York 11973 (USA) Clark University, Worcester, Massachusetts 01610
4. Brookhaven National Laboratory, Upton, New York 11973 (USA) Ames Laboratory, Iowa State University, Ames, Iowa 50011 (USA)
5. Institute for Nuclear Studies, PL 05-400, Swierk-Otwock, Poland (PL)
6. Institut fuer Kernphysik, Kernforschungsanlage Juelich G.m.b.H., D-5170 Juelich, Federal Republic of Germany (DE)

A recently developed technique for fast timing measurements using {beta}-{gamma}-{gamma} coincidences with plastic, BaF{sub 2} and Ge detectors, respectively, has been used to measure lifetimes in the range 5--1500 ps in the neutron-rich nuclei {sup 97}Sr, {sup 97}Y, and {sup 97}Zr. The results for {sup 97}Y are interpreted in terms of quadrupole vibrational excitations. For {sup 97}Sr the experimental data suggest the coexistence of spherical/vibrational and deformed states and allow the extraction of mixing matrix elements between them. A quadrupole moment of {vert bar}{ital Q}{sub 0}{vert bar}=3.5(4) {ital e} b for the deformed states in {sup 97}Sr has been deduced.

• DOE Contract Number: AC02-76CH00016; FG02-88ER40417; W-7405-ENG-82
• OSTI ID: 6964593
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:3; ISSN PRVCA; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

651720* -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COINCIDENCE SPECTROMETRY
DATA
DEFORMED NUCLEI
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENRICHED URANIUM REACTORS
EVEN-ODD NUCLEI
EXCITED STATES
EXPERIMENTAL DATA
GAMMA RADIATION
HEAVY WATER COOLED REACTORS
HEAVY WATER MODERATED REACTORS
HFBR REACTOR
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LIFETIME
MATRIX ELEMENTS
MEASURING INSTRUMENTS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
QUADRUPOLE MOMENTS
RADIATION DETECTORS
RADIATIONS
RADIOISOTOPES
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
ROTATIONAL STATES
SECONDS LIVING RADIOISOTOPES
STRONTIUM 97
STRONTIUM ISOTOPES
TANK TYPE REACTORS
THERMAL REACTORS
VIBRATIONAL STATES
YTTRIUM 97
YTTRIUM ISOTOPES
ZIRCONIUM 97
ZIRCONIUM ISOTOPES