Shears Mechanism in the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">A</mi><mi></mi><mi>∼</mi><mi></mi><mn>110</mn></math></span> Region

R. M. Clark; S. J. Asztalos; B. Busse; C. J. Chiara; M. Cromaz; M. A. Deleplanque; R. M. Diamond; P. Fallon; D. B. Fossan; D. G. Jenkins; S. Juutinen; N. Kelsall; R. Krücken; G. J. Lane; I. Y. Lee; A. O. Macchiavelli; R. W. MacLeod; G. Schmid; J. M. Sears; J. F. Smith; F. S. Stephens; K. Vetter; R. Wadsworth; S. Frauendorf

doi:10.1103/PhysRevLett.82.3220

Shears Mechanism in the $A \sim 110$ Region

R. M. Clark, S. J. Asztalos, B. Busse, C. J. Chiara, M. Cromaz, M. A. Deleplanque, R. M. Diamond, P. Fallon, D. B. Fossan, D. G. Jenkins, S. Juutinen, N. Kelsall, R. Krücken, G. J. Lane, I. Y. Lee, A. O. Macchiavelli, R. W. MacLeod, G. Schmid, J. M. Sears, J. F. Smith, F. S. Stephens, K. Vetter, R. Wadsworth, and S. Frauendorf

Phys. Rev. Lett. 82, 3220 – Published 19 April 1999

Abstract

Lifetimes of states in a rotational-like $M 1$ band in $^{110} Cd$ have been determined through a Doppler-shift attenuation method measurement performed with the Gammasphere array. The deduced $B (M 1)$ values, which agree well with the predictions of the tilted axis cranking model, clearly confirm that it has the character of a shears band. Using a semiclassical scheme of the coupling of two long $j$ vectors we deduce information on the strength and form of the effective interaction between the constituent nucleons. These results are the first definitive evidence of the shears mechanism and “magnetic rotation” in this mass region.

Received 13 July 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.3220

Authors & Affiliations

R. M. Clark¹, S. J. Asztalos¹, B. Busse¹, C. J. Chiara², M. Cromaz¹, M. A. Deleplanque¹, R. M. Diamond¹, P. Fallon¹, D. B. Fossan², D. G. Jenkins³, S. Juutinen⁴, N. Kelsall³, R. Krücken^1,*, G. J. Lane², I. Y. Lee¹, A. O. Macchiavelli¹, R. W. MacLeod¹, G. Schmid¹, J. M. Sears², J. F. Smith^2,†, F. S. Stephens¹, K. Vetter¹, R. Wadsworth³, and S. Frauendorf⁵

¹Lawrence Berkeley National Laboratory, Berkeley, California 94720
²Department of Physics, SUNY at Stony Brook, Stony Brook, New York 11794
³Department of Physics, University of York, Heslington, York, YO1 5DD, United Kingdom
⁴Department of Physics, University of Jyväskylä, Jyväskylä, Finland
⁵Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, PF 510119, D-01314 Dresden, Germany

^*Present address: W. A. Wright Nuclear Structure Laboratory, Physics Department, Yale University, P.O. Box 208124, New Haven, CT 06520.
^†Present address: Department of Physics, University of Manchester, Manchester M13 9PL, UK.