Evidence for Nontermination of Rotational Bands in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Kr</mml:mi><mml:mprescripts/><mml:none/><mml:mn>74</mml:mn></mml:mmultiscripts></mml:math>
J. J. Valiente‐DobónDepartment of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada. [email protected]T. SteinhardtC. E. SvenssonA. V. AfanasjevI. RagnarssonC. AndreoiuR. A. E. AustinM. P. CarpenterD. DashdorjG. de AngelisF. DönauJ. EberthE. FarneaS. J. FreemanNuclear PhysicsA. GadeaP. E. GarrettA. GörgenG. F. GrinyerB. HylandD. G. JenkinsF. Johnston‐TheasbyP. K. JoshiA. JungclausK.P. LiebA. O. MacchiavelliE. F. MooreG. MukherjeeD. R. NapoliA. A. PhillipsC. PlettnerW. ReviolD. G. SarantitesH. SchnareM. A. SchumakerR. SchwengnerD. SeweryniakM. B. SmithI. ŞtefânescuO. ThelenR. Wadsworth
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Three rotational bands in 74Kr were studied up to (in one case one transition short of) the maximum spin I(max) of their respective single-particle configurations. Their lifetimes have been determined using the Doppler-shift attenuation method. The deduced transition quadrupole moments reveal a modest decrease, but far from a complete loss of collectivity at the maximum spin I(max). This feature, together with the results of mean field calculations, indicates that the observed bands do not terminate at I = I(max).
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