Extreme Prolate Deformation in Light Strontium Isotopes

Multiple-particle, ..gamma..-ray coincidence techniques have been used to study neutron-deficient isotopes near N = Z = 40. Results are presented for /sup 77 -80/Sr. Levels in /sup 78/Sr were seen to J = 10 with E(2/sup +/) = 278 keV and T/sub 1/2/ = 155 +- 19 ps. The results suggest that this regio...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1982-01, Vol.49 (5), p.308-311
Hauptverfasser:	Lister, C. J., Varley, B. J., Price, H. G., Olness, J. W.
Format:	Artikel
Sprache:	eng
Schlagworte:	651623 - Nuclear Properties & Reactions, A=59-89, Experimental- Energy Levels & Transitions- (-1987) ALKALINE EARTH ISOTOPES BARYONS BETA DECAY RADIOISOTOPES BETA-PLUS DECAY RADIOISOTOPES CALCIUM 40 REACTIONS CALCIUM 40 TARGET CHARGED-PARTICLE REACTIONS COMPOUND-NUCLEUS REACTIONS DEFORMED NUCLEI ELECTRON CAPTURE RADIOISOTOPES ELEMENTARY PARTICLES ENERGY LEVELS ENERGY RANGE ENERGY-LEVEL TRANSITIONS EVEN-EVEN NUCLEI EVEN-ODD NUCLEI FERMIONS GAMMA SPECTRA HADRONS HEAVY ION REACTIONS HOURS LIVING RADIOISOTOPES INTERMEDIATE MASS NUCLEI ISOTOPES LIFETIME MAGNESIUM 24 REACTIONS MEV RANGE MEV RANGE 100-1000 MINUTES LIVING RADIOISOTOPES MOMENT OF INERTIA NEUTRONS NICKEL 58 TARGET NUCLEAR PHYSICS AND RADIATION PHYSICS NUCLEAR PROPERTIES NUCLEAR RADII NUCLEAR REACTIONS NUCLEI NUCLEONS PROTONS RADIOISOTOPES SECONDS LIVING RADIOISOTOPES SPECTRA STRONTIUM 77 STRONTIUM 78 STRONTIUM 79 STRONTIUM 80 STRONTIUM ISOTOPES TARGETS
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Zusammenfassung:	Multiple-particle, ..gamma..-ray coincidence techniques have been used to study neutron-deficient isotopes near N = Z = 40. Results are presented for /sup 77 -80/Sr. Levels in /sup 78/Sr were seen to J = 10 with E(2/sup +/) = 278 keV and T/sub 1/2/ = 155 +- 19 ps. The results suggest that this region contains some of the most deformed nuclei known, with quadrupole deformations epsilon/sub 2/roughly-equal0.4. These data resolve conflicting theoretical predictions of nuclear shapes and emphasize the important contribution of hexadecapole deformation in determining the most stable shape.
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.49.308