Total absorption γ-ray spectroscopy of niobium isomers

被引：19

作者：

Guadilla, V ^{[1
,4
]}

Algora, A. ^{[1
,2
]}

Tain, J. L. ^{[1
]}

Agramunt, J. ^{[1
]}

Aysto, J. ^{[3
]}

Briz, J. A. ^{[4
]}

Cucoanes, A. ^{[4
]}

Eronen, T. ^{[3
]}

Estienne, M. ^{[4
]}

Fallot, M. ^{[4
]}

Fraile, L. M. ^{[5
,6
]}

Ganioglu, E. ^{[7
]}

Gelletly, W. ^{[8
]}

Gorelov, D. ^{[3
]}

Hakala, J. ^{[3
]}

Jokinen, A. ^{[3
]}

Jordan, D. ^{[1
]}

Kankainen, A. ^{[3
]}

Kolhinen, V ^{[3
]}

Koponen, J. ^{[3
]}

Lebois, M. ^{[9
]}

Le Meur, L. ^{[4
]}

Martinez, T. ^{[10
]}

Monserrate, M. ^{[1
]}

Montaner-Piza, A. ^{[1
]}

Moore, I ^{[3
]}

Nacher, E. ^{[11
]}

Orrigo, S. E. A. ^{[1
]}

Penttila, H. ^{[3
]}

Pohjalainen, I ^{[3
]}

Porta, A. ^{[4
]}

Reinikainen, J. ^{[3
]}

Reponen, M. ^{[3
]}

Rinta-Antila, S. ^{[3
]}

Rubio, B. ^{[1
]}

Rytkonen, K. ^{[3
]}

Sarriguren, P. ^{[11
]}

Shiba, T. ^{[4
]}

Sonnenschein, V ^{[3
]}

Sonzogni, A. A. ^{[12
]}

Valencia, E. ^{[1
]}

Vedia, V. ^{[5
,6
]}

Voss, A. ^{[3
]}

Wilson, J. N. ^{[9
]}

Zakari-Issoufou, A-A ^{[4
]}

机构：

[1] Univ Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, Spain

[2] Hungarian Acad Sci, Inst Nucl Res, H-4026 Debrecen, Hungary

[3] Univ Jyvaskyla, Dept Phys, Jyvaskyla 40014, Finland

[4] Univ Nantes, CNRS, IN2P3, Subatech,IMT Atlantique, F-44307 Nantes, France

[5] Univ Complutense Madrid, CEI Moncloa, Grp Fis Nucl, E-28040 Madrid, Spain

[6] Univ Complutense Madrid, CEI Moncloa, IPARCOS, E-28040 Madrid, Spain

[7] Istanbul Univ, Dept Phys, TR-34134 Istanbul, Turkey

[8] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[9] Inst Phys Nucl Orsay, F-91406 Orsay, France

[10] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain

[11] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[12] Brookhaven Natl Lab, NNDC, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW C | 2019年 / 100卷 / 02期

基金：

英国科学技术设施理事会; 芬兰科学院;

关键词：

BETA-DECAY; NUCLEAR-DATA; SPECTRA; SPECTROMETER; BEAMS;

D O I：

10.1103/PhysRevC.100.024311

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 beta-intensity distributions of the decays of Nb-100gs,Nb-100m and Nb-102gs,Nb-102m have been determined using the total absorption gamma-ray spectroscopy technique. The JYFLTRAP double Penning trap system was employed in a campaign of challenging measurements performed with the decay total absorption gamma-ray spectrometer at the Ion Guide Isotope Separator On-Line facility in Jyvaskyla. Different strategies were applied to disentangle the isomeric states involved, lying very close in energy. The low-spin component of each niobium case was populated through the decay of the zirconium parent, which was treated as a contaminant. We have applied a method to extract this contamination, and additionally we have obtained beta-intensity distributions for these zirconium decays. The beta-strength distributions evaluated with these results were compared with calculations in a quasiparticle random-phase approximation, suggesting a prolate configuration for the ground states of Zr-100,Zr-102. The footprint of the Pandemonium effect was found when comparing our results for the analyses of the niobium isotopes with previous decay data. The beta-intensities of the decay of Nb-102m, for which there were no previous data, were obtained. A careful evaluation of the uncertainties was carried out, and the consistency of our results was validated taking advantage of the segmentation of our spectrometer. The final results were used as input in reactor summation calculations. A large impact on antineutrino spectrum calculations was already reported, and here we detail the significant impact on decay heat calculations.

引用

页数：15

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