Deformation driving intruder orbitals in 77Kr (CROSBI ID 77366)
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Podaci o odgovornosti
Sylvan, G.N. ; Doring, J. ; Johns, G.D. ; Tabor, S.L. ; Gross, C.J. ; Baktash, C. ; Jin, H.Q. ; Stracener, D.W. ; Hua, P.F. ; Korolija, Milorad ; LaFosse, D.R. ; Sašantites, D.G. ; Cristancho, F. ; Landulfo, E. ; Sašadin, J.X. ; Cederwall, B. ; Lee, I.Y. ; Macchiavelli, A.O. ; Rathbun, W. ; Vander Mollen, A.
engleski
Deformation driving intruder orbitals in 77Kr
High-spin states in Kr-77 were identified via analysis of prompt gamma-gamma coincidences in the Ni-58(Si-29, 2 alpha 2p) reaction at 128 MeV at the Gammasphere facility. Evaporation channel selection was achieved using the 95 element Microball charged-particle detector. 27 new states and 42 new transitions were found, The positive-parity bands were confirmed and the alpha=-1/2 band extended to 39/2(+). The negative-parity signature pair was extended to 31/2(-) and 37/2(-). Two new high-lying negative-parity bands were found extending from a state of spin I = 15/2 and energy 2.6 MeV to 17.4 MeV at I = (55/2). The new bands appear highly deformed and become yrast at high spin. A three-quasiparticle structure based on deformation driving, low-K unique-parity and intruder orbitals is suggested for them.
Shape coexistence; Nucleus Kr-86; Alignment; Excitations; Proton
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