Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly

T. D. Macdonald; B. E. Schultz; J. C. Bale; A. Chaudhuri; U. Chowdhury; D. Frekers; A. T. Gallant; A. Grossheim; A. A. Kwiatkowski; A. Lennarz; M. C. Simon; V. V. Simon; J. Dilling

doi:10.1103/PhysRevC.89.044318

Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly

T. D. Macdonald, B. E. Schultz, J. C. Bale, A. Chaudhuri, U. Chowdhury, D. Frekers, A. T. Gallant, A. Grossheim, A. A. Kwiatkowski, A. Lennarz, M. C. Simon, V. V. Simon, J. Dilling

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7 Scopus citations

Abstract

A direct Q-value measurement has been made at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) for the Cr51(e-,νe)V51 reaction. This electron capture (EC) reaction was used in calibration measurements at the solar neutrino experiments SAGE and GALLEX, and the observed event rate differed from predictions creating the so-called gallium anomaly. Using isotopes delivered by the Isotope Separator and Accelerator (ISAC) facility at TRIUMF and charge breeding them to charge states 5+ and 6+, a Q value of 751.86(55) keV was determined. This represents a 1.3σ deviation from the result in the Atomic Mass Evaluation 2012 (AME12) and the value used in the calculated event rate. This deviation is found to be insignificant in context of the gallium anomaly, thus confirming that the predicted event rate has not been overestimated as the result of an erroneous Cr51 EC Q value. Additionally, the absolute masses of each Cr51 and V51 have been independently determined and are in agreement with the AME12 values.

Original language	English
Article number	044318
Journal	Physical Review C - Nuclear Physics
Volume	89
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.89.044318
State	Published - Apr 18 2014
Externally published	Yes

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Macdonald, T. D., Schultz, B. E., Bale, J. C., Chaudhuri, A., Chowdhury, U., Frekers, D., Gallant, A. T., Grossheim, A., Kwiatkowski, A. A., Lennarz, A., Simon, M. C., Simon, V. V., & Dilling, J. (2014). Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly. Physical Review C - Nuclear Physics, 89(4), Article 044318. https://doi.org/10.1103/PhysRevC.89.044318

@article{f757cb5de0cf4205bef27e0580acf142,

title = "Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly",

abstract = "A direct Q-value measurement has been made at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) for the Cr51(e-,νe)V51 reaction. This electron capture (EC) reaction was used in calibration measurements at the solar neutrino experiments SAGE and GALLEX, and the observed event rate differed from predictions creating the so-called gallium anomaly. Using isotopes delivered by the Isotope Separator and Accelerator (ISAC) facility at TRIUMF and charge breeding them to charge states 5+ and 6+, a Q value of 751.86(55) keV was determined. This represents a 1.3σ deviation from the result in the Atomic Mass Evaluation 2012 (AME12) and the value used in the calculated event rate. This deviation is found to be insignificant in context of the gallium anomaly, thus confirming that the predicted event rate has not been overestimated as the result of an erroneous Cr51 EC Q value. Additionally, the absolute masses of each Cr51 and V51 have been independently determined and are in agreement with the AME12 values.",

author = "Macdonald, \{T. D.\} and Schultz, \{B. E.\} and Bale, \{J. C.\} and A. Chaudhuri and U. Chowdhury and D. Frekers and Gallant, \{A. T.\} and A. Grossheim and Kwiatkowski, \{A. A.\} and A. Lennarz and Simon, \{M. C.\} and Simon, \{V. V.\} and J. Dilling",

year = "2014",

month = apr,

day = "18",

doi = "10.1103/PhysRevC.89.044318",

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journal = "Physical Review C - Nuclear Physics",

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Macdonald, TD, Schultz, BE, Bale, JC, Chaudhuri, A, Chowdhury, U, Frekers, D, Gallant, AT, Grossheim, A, Kwiatkowski, AA, Lennarz, A, Simon, MC, Simon, VV & Dilling, J 2014, 'Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly', Physical Review C - Nuclear Physics, vol. 89, no. 4, 044318. https://doi.org/10.1103/PhysRevC.89.044318

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T1 - Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly

AU - Macdonald, T. D.

AU - Schultz, B. E.

AU - Bale, J. C.

AU - Chaudhuri, A.

AU - Chowdhury, U.

AU - Frekers, D.

AU - Gallant, A. T.

AU - Grossheim, A.

AU - Kwiatkowski, A. A.

AU - Lennarz, A.

AU - Simon, M. C.

AU - Simon, V. V.

AU - Dilling, J.

PY - 2014/4/18

Y1 - 2014/4/18

N2 - A direct Q-value measurement has been made at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) for the Cr51(e-,νe)V51 reaction. This electron capture (EC) reaction was used in calibration measurements at the solar neutrino experiments SAGE and GALLEX, and the observed event rate differed from predictions creating the so-called gallium anomaly. Using isotopes delivered by the Isotope Separator and Accelerator (ISAC) facility at TRIUMF and charge breeding them to charge states 5+ and 6+, a Q value of 751.86(55) keV was determined. This represents a 1.3σ deviation from the result in the Atomic Mass Evaluation 2012 (AME12) and the value used in the calculated event rate. This deviation is found to be insignificant in context of the gallium anomaly, thus confirming that the predicted event rate has not been overestimated as the result of an erroneous Cr51 EC Q value. Additionally, the absolute masses of each Cr51 and V51 have been independently determined and are in agreement with the AME12 values.

AB - A direct Q-value measurement has been made at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) for the Cr51(e-,νe)V51 reaction. This electron capture (EC) reaction was used in calibration measurements at the solar neutrino experiments SAGE and GALLEX, and the observed event rate differed from predictions creating the so-called gallium anomaly. Using isotopes delivered by the Isotope Separator and Accelerator (ISAC) facility at TRIUMF and charge breeding them to charge states 5+ and 6+, a Q value of 751.86(55) keV was determined. This represents a 1.3σ deviation from the result in the Atomic Mass Evaluation 2012 (AME12) and the value used in the calculated event rate. This deviation is found to be insignificant in context of the gallium anomaly, thus confirming that the predicted event rate has not been overestimated as the result of an erroneous Cr51 EC Q value. Additionally, the absolute masses of each Cr51 and V51 have been independently determined and are in agreement with the AME12 values.

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DO - 10.1103/PhysRevC.89.044318

M3 - Article

AN - SCOPUS:84899733502

SN - 0556-2813

VL - 89

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

M1 - 044318

ER -

Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly

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