method seems remote but cannot be entirely excluded.Further measurements are needed to locate the source of the discrepancies in j assignments. Both p-y angular-correlation and y-ray circularpolarization measurements using high-resolution y detectors would seem appropriate for the transitions in question since these experiments provide independent checks on j assignments. For the state in 41 Ca at E x = 3.62 MeV we suggest the possibility that there exist two unresolved states whose relative population in the (d,p) reaction is different at 4 MeV deuteron energy where the (d,py) measurements 19 " 21 were made than at 11 MeV where the polarized-beam method was employed.In this Letter we report experimental evidence for rotational-like behavior in very neutron-rich even-even 40 Zr, 42 Mo, 44 Ru, and 46 Pd isotopes, These results support recent theoretical studies by Ragnarsson and Nilsson 1 and by Arseniev, Sobieczewski, and Soloviev 2 which have predicted a new region of stable deformation which includes these nuclei. Fission fragments from spontane-9

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