Nuclear structure relevant to neutrinoless double β decay:: 76Ge and 76Se

被引：125

作者：

Schiffer, J. P. ^{[1
]}

Freeman, S. J. ^{[2
]}

Clark, J. A. ^{[3
]}

Deibel, C. ^{[3
]}

Fitzpatrick, C. R. ^{[2
]}

Gros, S. ^{[1
]}

Heinz, A. ^{[3
]}

Hirata, D. ^{[4
,5
]}

Jiang, C. L. ^{[1
]}

Kay, B. P. ^{[2
]}

Parikh, A. ^{[3
]}

Parker, P. D. ^{[3
]}

Rehm, K. E. ^{[1
]}

Villari, A. C. C. ^{[4
]}

Werner, V. ^{[3
]}

Wrede, C. ^{[3
]}

机构：

[1] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[2] Univ Manchester, Manchester M13 9PL, Lancs, England

[3] Yale Univ, New Haven, CT 06520 USA

[4] CEA, IN2P3, GANIL, CNRS,DSM, F-14076 Caen 5, France

[5] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 11期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.100.112501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The possibility of observing neutrinoless double beta decay offers the opportunity of determining the effective neutrino mass if the nuclear matrix element were known. Theoretical calculations are uncertain, and measurements of the occupations of valence orbits by nucleons active in the decay can be important. The occupation of valence neutron orbits in the ground states of Ge-76 (a candidate for such decay) and Se-76 (the daughter nucleus) were determined by precisely measuring cross sections for both neutron-adding and removing transfer reactions. Our results indicate that the Fermi surface is much more diffuse than in theoretical calculations. We find that the populations of at least three orbits change significantly between these two ground states while in the calculations, the changes are confined primarily to one orbit.

引用

页数：4

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