High-precision mass measurement of neutron-rich 96Kr

Matthew B. Smith; Tobias Murböck; Eleanor Dunling; Andrew Jacobs; Brian Kootte; Yang Lan; Erich Leistenschneider; David Lunney; Eleni Marina Lykiardopoulou; Ish Mukul; Stefan F. Paul; Moritz P. Reiter; Christian Will; Jens Dilling; Anna A. Kwiatkowski

doi:10.1007/s10751-020-01722-2

High-precision mass measurement of neutron-rich 96Kr

Matthew B. Smith, Tobias Murböck, Eleanor Dunling, Andrew Jacobs, Brian Kootte, Yang Lan, Erich Leistenschneider, David Lunney, Eleni Marina Lykiardopoulou, Ish Mukul, Stefan F. Paul, Moritz P. Reiter, Christian Will, Jens Dilling, Anna A. Kwiatkowski

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4 Scopus citations

Abstract

While the nuclear deformation in the region around Z = 40 and N = 60 has been studied in great detail, the possible onset of nuclear deformation in the isotopic chain of krypton (Z = 36) is still a subject of controversy. Here, we present a high-precision mass measurement of the neutron-rich nuclide ⁹⁶Kr, as measured by the Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN). A statistical method, based on a hyper-exponentially modified Gaussian, has been employed to model the data. As such, the uncertainty introduced by overlapping peaks from beam contaminants was reduced and the mass excess of ⁹⁶Kr determined to be -53097(57)keV. The capability of the method has been confirmed with measurements of the stable isotopic pair ⁴⁰Ar/⁴⁰Ca, in which a relative accuracy Δm/m of 3.5 ⋅ 10^{− 8} and a mass resolving power of more than 400000 were achieved.

Original language	English
Article number	59
Journal	Hyperfine Interactions
Volume	241
Issue number	1
DOIs	https://doi.org/10.1007/s10751-020-01722-2
State	Published - Dec 1 2020
Externally published	Yes

Funding

This work was supported by BMBF (grants 05P15RGFN1 and 05P12RGFN8), and by the JLU and GSI under the JLU-GSI strategic Helmholtz partnership agreement, by the Canada-UK foundation, and by France’s IN2P3 and the Programme Internationale de Coopération Scientifique “PACIFIC”. E.L. acknowledges support from Brazil’s Conselho Nacional de Desenvolvimento Cientifico e Tecnolgico (CNPq) under Science Without Borders’ grant no. 249121/2013-1. This work was supported by BMBF (grants 05P15RGFN1 and 05P12RGFN8), and by the JLU and GSI under the JLU-GSI strategic Helmholtz partnership agreement, by the Canada-UK foundation, and by France?s IN2P3 and the Programme Internationale de Coop?ration Scientifique ?PACIFIC?. E.L. acknowledges support from Brazil?s Conselho Nacional de Desenvolvimento Cientifico e Tecnolgico (CNPq) under Science Without Borders? grant no. 249121/2013-1.

Funders	Funder number
Conselho Nacional de Desenvolvimento Cientifico e Tecnolgico
France?s IN2P3
France’s IN2P3
Bundesministerium für Bildung und Forschung	05P15RGFN1, 05P12RGFN8
Conselho Nacional de Desenvolvimento Científico e Tecnológico	249121/2013-1
Jilin University
GSI Helmholtzzentrum für Schwerionenforschung
Foundation for Canadian Studies in the United Kingdom

Keywords

Atomic masses
Binding energy
Exotic nuclei
HEMG
Hyper-exponentially modified gaussian
Multiple reflection
Time-of-flight mass spectrometer

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10.1007/s10751-020-01722-2

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abstract = "While the nuclear deformation in the region around Z = 40 and N = 60 has been studied in great detail, the possible onset of nuclear deformation in the isotopic chain of krypton (Z = 36) is still a subject of controversy. Here, we present a high-precision mass measurement of the neutron-rich nuclide 96Kr, as measured by the Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF{\textquoteright}s Ion Trap for Atomic and Nuclear Science (TITAN). A statistical method, based on a hyper-exponentially modified Gaussian, has been employed to model the data. As such, the uncertainty introduced by overlapping peaks from beam contaminants was reduced and the mass excess of 96Kr determined to be -53097(57)keV. The capability of the method has been confirmed with measurements of the stable isotopic pair 40Ar/40Ca, in which a relative accuracy Δm/m of 3.5 ⋅ 10− 8 and a mass resolving power of more than 400000 were achieved.",

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AU - Jacobs, Andrew

AU - Kootte, Brian

AU - Lan, Yang

AU - Leistenschneider, Erich

AU - Lunney, David

AU - Lykiardopoulou, Eleni Marina

AU - Mukul, Ish

AU - Paul, Stefan F.

AU - Reiter, Moritz P.

AU - Will, Christian

AU - Dilling, Jens

AU - Kwiatkowski, Anna A.

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N2 - While the nuclear deformation in the region around Z = 40 and N = 60 has been studied in great detail, the possible onset of nuclear deformation in the isotopic chain of krypton (Z = 36) is still a subject of controversy. Here, we present a high-precision mass measurement of the neutron-rich nuclide 96Kr, as measured by the Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN). A statistical method, based on a hyper-exponentially modified Gaussian, has been employed to model the data. As such, the uncertainty introduced by overlapping peaks from beam contaminants was reduced and the mass excess of 96Kr determined to be -53097(57)keV. The capability of the method has been confirmed with measurements of the stable isotopic pair 40Ar/40Ca, in which a relative accuracy Δm/m of 3.5 ⋅ 10− 8 and a mass resolving power of more than 400000 were achieved.

AB - While the nuclear deformation in the region around Z = 40 and N = 60 has been studied in great detail, the possible onset of nuclear deformation in the isotopic chain of krypton (Z = 36) is still a subject of controversy. Here, we present a high-precision mass measurement of the neutron-rich nuclide 96Kr, as measured by the Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN). A statistical method, based on a hyper-exponentially modified Gaussian, has been employed to model the data. As such, the uncertainty introduced by overlapping peaks from beam contaminants was reduced and the mass excess of 96Kr determined to be -53097(57)keV. The capability of the method has been confirmed with measurements of the stable isotopic pair 40Ar/40Ca, in which a relative accuracy Δm/m of 3.5 ⋅ 10− 8 and a mass resolving power of more than 400000 were achieved.

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High-precision mass measurement of neutron-rich 96Kr

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Keywords

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