Neutron pair correlations in A=100 nuclei involved in neutrinoless double-β decay

被引：14

作者：

Thomas, J. S. ^{[1
]}

Freeman, S. J. ^{[1
]}

Deibel, C. M. ^{[2
,3
]}

Faestermann, T. ^{[4
,5
]}

Hertenberger, R. ^{[5
,6
]}

Kay, B. P. ^{[7
]}

McAllister, S. A. ^{[1
]}

Mitchell, A. J. ^{[1
]}

Schiffer, J. P. ^{[2
]}

Sharp, D. K. ^{[1
]}

Wirth, H-F. ^{[5
,6
]}

机构：

[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

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

[3] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA

[4] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany

[5] Munchner Univ MLL, Maier Leibnitz Lab, D-85748 Garching, Germany

[6] Univ Munich, Fak Phys, D-85748 Garching, Germany

[7] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

来源：

PHYSICAL REVIEW C | 2012年 / 86卷 / 04期

基金：

英国科学技术设施理事会;

关键词：

DATA SHEETS; ISOTOPES; STATES;

D O I：

10.1103/PhysRevC.86.047304

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：

The pairing properties of the neutrinoless double-beta decay (0 nu 2 beta) candidate Mo-100 have been studied, along with its daughter Ru-100, to provide input for nuclear matrix element calculations relevant to the decay. The (p, t) two-neutron transfer reaction was measured on nuclei of Ru-102,Ru-100 and Mo-100,Mo-98. The experiment was designed to have particular sensitivity to 0(+) states up to excitation energies of similar to 3 MeV with high energy resolution. Measurements were made at two angles and L = 0 transitions identified by the ratio of yields between the two angles. For the reactions leading to and from Ru-100, greater than 95% of the L = 0 (p, t) strength was in the ground state, but in Mo-100 about 20% was in excited 0(+) states. The measured (p, t) data, together with existing (t, p) data, suggest that Mo-100 is a shape-transitional nucleus while Ru-100 is closer to the spherical side of that transition. Theoretical calculations of the 0 nu 2 beta nuclear matrix element may be complicated by this difference in shape.

引用

页数：5

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