Naslov
Resolution-enhanced spectroscopy of 81Y

Autori
Schnare, H. ; Winter, G. ; Kaubler, L. ; Reif, J. ; Schwengner, R. ; Doring, J. ; Johns, G.D. ; Tabor, S.L. ; Gross, C.J. ; Akovali, Y.A. ; Baktash, C. ; Stracener, D.W. ; Durham, F.E. ; Hua, P.F. ; Korolija, Milorad ; LaFosse, D.R. ; Sašantites, D.G. ; Lee, I.Y. ; Macchiavelli, A.O. ; Rathbun, W. ; Vander Mollen, A.

Izvornik
Physical review C : nuclear physics (0556-2813) 56 (1997), 2; 729-744

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Shape coexistence; Superdeformed band; Transition strengths; Mass region; Excitations; Rb-79; Nuclei; Zr-84; Sr-82; Kr-79

Sažetak
The fusion-evaporation reaction Ni-58(S-32, 2 alpha p) has been used to study the neutron-deficient isotope Y-81. Multiple particle gamma-ray coincidences have been detected by the GAMMASPHERE array combined with the MICROBALL charged-particle detector system. Gamma-ray spectra with an improved resolution have been achieved from an event-by-event determination of the nucleus recoil momentum, thus allowing a precise Doppler-shift correction. In this way a resolution enhancement by a factor 2 was obtained for a 1 MeV gamma line. During the analysis an E-gamma-E-gamma matrix Bs well las an E-gamma-E-gamma-E-gamma cube have been used to extend the previously known level scheme to higher spin (I approximate to 57/2) and excitation energy (E-x approximate to 17 MeV). More than 100 new gamma rays and 80 new levels have been added to the level scheme and six new bands have been established. The interpretation of these bands in terms of the cranking model and their comparison with similar bands in neighboring nuclei is discussed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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