Proton pair correlations and the neutrinoless double-β decay of 76Ge

被引：14
|
作者：
Roberts, A. [1 ]
Howard, A. M. [1 ]
Kolata, J. J. [1 ]
Villano, A. N. [2 ]
Becchetti, F. D. [3 ]
DeYoung, P. A. [4 ]
Febbraro, M. [3 ]
Freeman, S. J. [5 ]
Kay, B. P. [6 ]
McAllister, S. A. [5 ]
Mitchell, A. J. [5 ]
Schiffer, J. P. [7 ]
Thomas, J. S. [5 ]
Torres-Isea, R. O. [3 ]
机构：
[1] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA
[2] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA
[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[4] Hope Coll, Dept Phys, Holland, MI 49422 USA
[5] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England
[6] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England
[7] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA
来源：
PHYSICAL REVIEW C | 2013年 / 87卷 / 05期
基金：
美国国家科学基金会; 英国科学技术设施理事会;
关键词：
D O I：
10.1103/PhysRevC.87.051305
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Proton pair correlations relevant for the neutrinoless double-beta decay of Ge-76 have been probed via the Ge-74,Ge-76(He-3,n) reactions at 16 MeV. No evidence for pairing vibrations in either nucleus is observed at sensitivity limits of similar to 6% and similar to 19% of the ground-state strength in Se-76 and Se-78, respectively. These results are relevant for the understanding of matrix elements for neutrinoless double-beta decay. The lack of pairing vibrations is consistent with a simple BCS structure for the ground states of Ge-76 and Se-76, assumed in quasiparticle random phase approximation (QRPA) models of the process.
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页数：5
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