Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes

D. Frekers; M. C. Simon; C. Andreoiu; J. C. Bale; M. Brodeur; T. Brunner; A. Chaudhuri; U. Chowdhury; J. R. Crespo López-Urrutia; P. Delheij; H. Ejiri; S. Ettenauer; A. T. Gallant; V. Gavrin; A. Grossheim; M. N. Harakeh; F. Jang; A. A. Kwiatkowski; J. Lassen; A. Lennarz; M. Luichtl; T. Ma; T. D. Macdonald; E. Mané; D. Robertson; B. E. Schultz; V. V. Simon; A. Teigelhöfer; J. Dilling

doi:10.1016/j.physletb.2013.04.019

Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes

D. Frekers, M. C. Simon, C. Andreoiu, J. C. Bale, M. Brodeur, T. Brunner, A. Chaudhuri, U. Chowdhury, J. R. Crespo López-Urrutia, P. Delheij, H. Ejiri, S. Ettenauer, A. T. Gallant, V. Gavrin, A. Grossheim, M. N. Harakeh, F. Jang, A. A. Kwiatkowski, J. Lassen, A. LennarzM. Luichtl, T. Ma, T. D. Macdonald, E. Mané, D. Robertson, B. E. Schultz, V. V. Simon, A. Teigelhöfer, J. Dilling

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Abstract

We present a first direct Q-value measurement of the Ga71(ν,e-)Ge71 reaction using the TITAN mass-measurement facility at ISAC/TRIUMF. The measurements were performed in a Penning trap on neon-like ⁷¹Ga²¹⁺ and ⁷¹Ge²²⁺ using isobar separation of the on-line produced mother and daughter nuclei through threshold charge breeding in an electron-beam ion trap. In addition, isoionic samples of ⁷¹Ga²¹⁺ and ⁷¹Ge²¹⁺ were stored concurrently in the Penning trap and provided a separate Q-value measurement. Both independent measurements result in a combined Q-value of 233.5 ± 1.2 keV, which is in agreement with the previously accepted Q-value for the ν cross-section calculations. Together with a recent measurement of the ν-response from the excited states in ⁷¹Ge, we conclude that there are no further uncertainties in the nuclear structure, which could remove the persistent discrepancy between the SAGE and GALLEX calibration measurements performed with neutrinos from reactor-produced ⁵¹Cr and ³⁷Ar sources and the theoretical expectation.

Original language	English
Pages (from-to)	233-237
Number of pages	5
Journal	Physics Letters B
Volume	722
Issue number	4-5
DOIs	https://doi.org/10.1016/j.physletb.2013.04.019
State	Published - May 24 2013
Externally published	Yes

Funding

This work has been supported by the Natural Sciences and Engineering Research Council of Canada and the National Research Council of Canada . D.F. and A.L. acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG) under grant FR 601/3-1 , S.E. from the Vanier CGS , T.B. from the Evangelisches Studienwerk e.V. Villigst , V.V.S. from the Studienstiftung des Deutschen Volkes , A.T.G. from the NSERC CGS-D and T.D.M. from the NSERC CGS-M . D.F. further expresses his gratitude to TRIUMF for the hospitality and support during his extended stay. We thank the TRIUMF technical staff, the ISAC beam delivery group, and M. Good for their continuous support.

Funders	Funder number
Evangelisches Studienwerk
Natural Sciences and Engineering Research Council of Canada
National Research Council Canada
Deutsche Forschungsgemeinschaft	FR 601/3-1
Deutsche Forschungsgemeinschaft
Studienstiftung des Deutschen Volkes

Keywords

Highly-charged ions
Ion-traps
Mass-measurement
Neutrino-induced reactions
Radioactive beams
Solar neutrinos

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10.1016/j.physletb.2013.04.019

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Frekers, D., Simon, M. C., Andreoiu, C., Bale, J. C., Brodeur, M., Brunner, T., Chaudhuri, A., Chowdhury, U., Crespo López-Urrutia, J. R., Delheij, P., Ejiri, H., Ettenauer, S., Gallant, A. T., Gavrin, V., Grossheim, A., Harakeh, M. N., Jang, F., Kwiatkowski, A. A., Lassen, J., ... Dilling, J. (2013). Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes. Physics Letters B, 722(4-5), 233-237. https://doi.org/10.1016/j.physletb.2013.04.019

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title = "Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes",

abstract = "We present a first direct Q-value measurement of the Ga71(ν,e-)Ge71 reaction using the TITAN mass-measurement facility at ISAC/TRIUMF. The measurements were performed in a Penning trap on neon-like 71Ga21+ and 71Ge22+ using isobar separation of the on-line produced mother and daughter nuclei through threshold charge breeding in an electron-beam ion trap. In addition, isoionic samples of 71Ga21+ and 71Ge21+ were stored concurrently in the Penning trap and provided a separate Q-value measurement. Both independent measurements result in a combined Q-value of 233.5 ± 1.2 keV, which is in agreement with the previously accepted Q-value for the ν cross-section calculations. Together with a recent measurement of the ν-response from the excited states in 71Ge, we conclude that there are no further uncertainties in the nuclear structure, which could remove the persistent discrepancy between the SAGE and GALLEX calibration measurements performed with neutrinos from reactor-produced 51Cr and 37Ar sources and the theoretical expectation.",

keywords = "Highly-charged ions, Ion-traps, Mass-measurement, Neutrino-induced reactions, Radioactive beams, Solar neutrinos",

author = "D. Frekers and Simon, {M. C.} and C. Andreoiu and Bale, {J. C.} and M. Brodeur and T. Brunner and A. Chaudhuri and U. Chowdhury and {Crespo L{\'o}pez-Urrutia}, {J. R.} and P. Delheij and H. Ejiri and S. Ettenauer and Gallant, {A. T.} and V. Gavrin and A. Grossheim and Harakeh, {M. N.} and F. Jang and Kwiatkowski, {A. A.} and J. Lassen and A. Lennarz and M. Luichtl and T. Ma and Macdonald, {T. D.} and E. Man{\'e} and D. Robertson and Schultz, {B. E.} and Simon, {V. V.} and A. Teigelh{\"o}fer and J. Dilling",

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doi = "10.1016/j.physletb.2013.04.019",

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journal = "Physics Letters B",

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Frekers, D, Simon, MC, Andreoiu, C, Bale, JC, Brodeur, M, Brunner, T, Chaudhuri, A, Chowdhury, U, Crespo López-Urrutia, JR, Delheij, P, Ejiri, H, Ettenauer, S, Gallant, AT, Gavrin, V, Grossheim, A, Harakeh, MN, Jang, F, Kwiatkowski, AA, Lassen, J, Lennarz, A, Luichtl, M, Ma, T, Macdonald, TD, Mané, E, Robertson, D, Schultz, BE, Simon, VV, Teigelhöfer, A & Dilling, J 2013, 'Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes', Physics Letters B, vol. 722, no. 4-5, pp. 233-237. https://doi.org/10.1016/j.physletb.2013.04.019

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T1 - Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes

AU - Frekers, D.

AU - Simon, M. C.

AU - Andreoiu, C.

AU - Bale, J. C.

AU - Brodeur, M.

AU - Brunner, T.

AU - Chaudhuri, A.

AU - Chowdhury, U.

AU - Crespo López-Urrutia, J. R.

AU - Delheij, P.

AU - Ejiri, H.

AU - Ettenauer, S.

AU - Gallant, A. T.

AU - Gavrin, V.

AU - Grossheim, A.

AU - Harakeh, M. N.

AU - Jang, F.

AU - Kwiatkowski, A. A.

AU - Lassen, J.

AU - Lennarz, A.

AU - Luichtl, M.

AU - Ma, T.

AU - Macdonald, T. D.

AU - Mané, E.

AU - Robertson, D.

AU - Schultz, B. E.

AU - Simon, V. V.

AU - Teigelhöfer, A.

AU - Dilling, J.

PY - 2013/5/24

Y1 - 2013/5/24

N2 - We present a first direct Q-value measurement of the Ga71(ν,e-)Ge71 reaction using the TITAN mass-measurement facility at ISAC/TRIUMF. The measurements were performed in a Penning trap on neon-like 71Ga21+ and 71Ge22+ using isobar separation of the on-line produced mother and daughter nuclei through threshold charge breeding in an electron-beam ion trap. In addition, isoionic samples of 71Ga21+ and 71Ge21+ were stored concurrently in the Penning trap and provided a separate Q-value measurement. Both independent measurements result in a combined Q-value of 233.5 ± 1.2 keV, which is in agreement with the previously accepted Q-value for the ν cross-section calculations. Together with a recent measurement of the ν-response from the excited states in 71Ge, we conclude that there are no further uncertainties in the nuclear structure, which could remove the persistent discrepancy between the SAGE and GALLEX calibration measurements performed with neutrinos from reactor-produced 51Cr and 37Ar sources and the theoretical expectation.

AB - We present a first direct Q-value measurement of the Ga71(ν,e-)Ge71 reaction using the TITAN mass-measurement facility at ISAC/TRIUMF. The measurements were performed in a Penning trap on neon-like 71Ga21+ and 71Ge22+ using isobar separation of the on-line produced mother and daughter nuclei through threshold charge breeding in an electron-beam ion trap. In addition, isoionic samples of 71Ga21+ and 71Ge21+ were stored concurrently in the Penning trap and provided a separate Q-value measurement. Both independent measurements result in a combined Q-value of 233.5 ± 1.2 keV, which is in agreement with the previously accepted Q-value for the ν cross-section calculations. Together with a recent measurement of the ν-response from the excited states in 71Ge, we conclude that there are no further uncertainties in the nuclear structure, which could remove the persistent discrepancy between the SAGE and GALLEX calibration measurements performed with neutrinos from reactor-produced 51Cr and 37Ar sources and the theoretical expectation.

KW - Highly-charged ions

KW - Ion-traps

KW - Mass-measurement

KW - Neutrino-induced reactions

KW - Radioactive beams

KW - Solar neutrinos

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U2 - 10.1016/j.physletb.2013.04.019

DO - 10.1016/j.physletb.2013.04.019

M3 - Article

AN - SCOPUS:84877589450

SN - 0370-2693

VL - 722

SP - 233

EP - 237

JO - Physics Letters B

JF - Physics Letters B

IS - 4-5

ER -

Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes

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Keywords

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