Pair correlations in nuclei involved in neutrinoless double β decay:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ge</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>76</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Se</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>76</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
S. J. FreemanSchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomJ. P. SchifferArgonne National Laboratory, Argonne, Illinois 60439, USAA. C. C. VillariGANIL (IN2P3/CNRS-DSM/CEA), B. P. 55027 F-14076 Caen Cedex 5, FranceJason A. ClarkA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USAC. M. DeibelA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USAS. GrosArgonne National Laboratory, Argonne, Illinois 60439, USAA. HeinzA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USAD. HirataGANIL (IN2P3/CNRS-DSM/CEA), B. P. 55027 F-14076 Caen Cedex 5, FranceC. L. JiangArgonne National Laboratory, Argonne, Illinois 60439, USAB. P. KaySchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomA. ParikhA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USAP. D. ParkerA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USAJ. QianA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USAK. E. RehmArgonne National Laboratory, Argonne, Illinois 60439, USAXiaodong TangArgonne National Laboratory, Argonne, Illinois 60439, USAV. WernerA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USAC. WredeA. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA
2007lv
ABI
Аннотация
Precision measurements were carried out to test the similarities between the ground states of $^{76}\mathrm{Ge}$ and $^{76}\mathrm{Se}$. The extent to which these two nuclei can be characterized as consisting of correlated pairs of neutrons in a BCS-like ground state was studied. The pair removal $(p,t)$ reaction was measured at the far forward angle of ${3}^{\ifmmode^\circ\else\textdegree\fi{}}$. The relative cross sections are consistent (at the 5% level) with the description of these nuclei in terms of a correlated pairing state outside the $N=28$ closed shells with no pairing vibrations. Data were also obtained for $^{74}\mathrm{Ge}$ and $^{78}\mathrm{Se}$.
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