The (3He,t) reaction on 76Ge, and the double-β-decay matrix element

J. H. Thies; D. Frekers; T. Adachi; M. Dozono; H. Ejiri; H. Fujita; Y. Fujita; M. Fujiwara; E. W. Grewe; K. Hatanaka; P. Heinrichs; D. Ishikawa; N. T. Khai; A. Lennarz; H. Matsubara; H. Okamura; Y. Y. Oo; P. Puppe; T. Ruhe; K. Suda; A. Tamii; H. P. Yoshida; R. G.T. Zegers

doi:10.1103/PhysRevC.86.014304

The (3He,t) reaction on 76Ge, and the double-β-decay matrix element

J. H. Thies, D. Frekers, T. Adachi, M. Dozono, H. Ejiri, H. Fujita, Y. Fujita, M. Fujiwara, E. W. Grewe, K. Hatanaka, P. Heinrichs, D. Ishikawa, N. T. Khai, A. Lennarz, H. Matsubara, H. Okamura, Y. Y. Oo, P. Puppe, T. Ruhe, K. SudaA. Tamii, H. P. Yoshida, R. G.T. Zegers

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Abstract

A 76Ge(3He,t)76As charge-exchange experiment at an incident energy of 420 MeV has been performed with an energy resolution of 30 keV. The Gamow-Teller GT^- strength distribution in 76As, which is the intermediate nucleus in the double-beta (ββ) decay of 76Ge, has been extracted. An unusually strong fragmentation of the GT^- strength is observed even at low excitation energies of E_x≤5MeV. By combining the data with those for GT⁺ transitions from a recent 76Se(d,2He)76As measurement, the nuclear matrix element for the 76Ge 2νββ decay has been evaluated. A lack of correlation among the GT transition strengths feeding the same levels from the two different directions is observed. The impact on the 76Ge 2νββ decay nuclear matrix element is discussed.

Original language	English
Article number	014304
Journal	Physical Review C - Nuclear Physics
Volume	86
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.86.014304
Publication status	Published - 03-07-2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.86.014304

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Thies, J. H., Frekers, D., Adachi, T., Dozono, M., Ejiri, H., Fujita, H., Fujita, Y., Fujiwara, M., Grewe, E. W., Hatanaka, K., Heinrichs, P., Ishikawa, D., Khai, N. T., Lennarz, A., Matsubara, H., Okamura, H., Oo, Y. Y., Puppe, P., Ruhe, T., ... Zegers, R. G. T. (2012). The (3He,t) reaction on 76Ge, and the double-β-decay matrix element. Physical Review C - Nuclear Physics, 86(1), Article 014304. https://doi.org/10.1103/PhysRevC.86.014304

@article{5d35f95d03ec4bd4a65453e0519fcf7b,

title = "The (3He,t) reaction on 76Ge, and the double-β-decay matrix element",

abstract = "A 76Ge(3He,t)76As charge-exchange experiment at an incident energy of 420 MeV has been performed with an energy resolution of 30 keV. The Gamow-Teller GT- strength distribution in 76As, which is the intermediate nucleus in the double-beta (ββ) decay of 76Ge, has been extracted. An unusually strong fragmentation of the GT- strength is observed even at low excitation energies of Ex≤5MeV. By combining the data with those for GT+ transitions from a recent 76Se(d,2He)76As measurement, the nuclear matrix element for the 76Ge 2νββ decay has been evaluated. A lack of correlation among the GT transition strengths feeding the same levels from the two different directions is observed. The impact on the 76Ge 2νββ decay nuclear matrix element is discussed.",

author = "Thies, {J. H.} and D. Frekers and T. Adachi and M. Dozono and H. Ejiri and H. Fujita and Y. Fujita and M. Fujiwara and Grewe, {E. W.} and K. Hatanaka and P. Heinrichs and D. Ishikawa and Khai, {N. T.} and A. Lennarz and H. Matsubara and H. Okamura and Oo, {Y. Y.} and P. Puppe and T. Ruhe and K. Suda and A. Tamii and Yoshida, {H. P.} and Zegers, {R. G.T.}",

year = "2012",

month = jul,

day = "3",

doi = "10.1103/PhysRevC.86.014304",

language = "English",

volume = "86",

journal = "Physical Review C - Nuclear Physics",

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publisher = "American Physical Society",

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Thies, JH, Frekers, D, Adachi, T, Dozono, M, Ejiri, H, Fujita, H, Fujita, Y, Fujiwara, M, Grewe, EW, Hatanaka, K, Heinrichs, P, Ishikawa, D, Khai, NT, Lennarz, A, Matsubara, H, Okamura, H, Oo, YY, Puppe, P, Ruhe, T, Suda, K, Tamii, A, Yoshida, HP & Zegers, RGT 2012, 'The (3He,t) reaction on 76Ge, and the double-β-decay matrix element', Physical Review C - Nuclear Physics, vol. 86, no. 1, 014304. https://doi.org/10.1103/PhysRevC.86.014304

TY - JOUR

T1 - The (3He,t) reaction on 76Ge, and the double-β-decay matrix element

AU - Thies, J. H.

AU - Frekers, D.

AU - Adachi, T.

AU - Dozono, M.

AU - Ejiri, H.

AU - Fujita, H.

AU - Fujita, Y.

AU - Fujiwara, M.

AU - Grewe, E. W.

AU - Hatanaka, K.

AU - Heinrichs, P.

AU - Ishikawa, D.

AU - Khai, N. T.

AU - Lennarz, A.

AU - Matsubara, H.

AU - Okamura, H.

AU - Oo, Y. Y.

AU - Puppe, P.

AU - Ruhe, T.

AU - Suda, K.

AU - Tamii, A.

AU - Yoshida, H. P.

AU - Zegers, R. G.T.

PY - 2012/7/3

Y1 - 2012/7/3

N2 - A 76Ge(3He,t)76As charge-exchange experiment at an incident energy of 420 MeV has been performed with an energy resolution of 30 keV. The Gamow-Teller GT- strength distribution in 76As, which is the intermediate nucleus in the double-beta (ββ) decay of 76Ge, has been extracted. An unusually strong fragmentation of the GT- strength is observed even at low excitation energies of Ex≤5MeV. By combining the data with those for GT+ transitions from a recent 76Se(d,2He)76As measurement, the nuclear matrix element for the 76Ge 2νββ decay has been evaluated. A lack of correlation among the GT transition strengths feeding the same levels from the two different directions is observed. The impact on the 76Ge 2νββ decay nuclear matrix element is discussed.

AB - A 76Ge(3He,t)76As charge-exchange experiment at an incident energy of 420 MeV has been performed with an energy resolution of 30 keV. The Gamow-Teller GT- strength distribution in 76As, which is the intermediate nucleus in the double-beta (ββ) decay of 76Ge, has been extracted. An unusually strong fragmentation of the GT- strength is observed even at low excitation energies of Ex≤5MeV. By combining the data with those for GT+ transitions from a recent 76Se(d,2He)76As measurement, the nuclear matrix element for the 76Ge 2νββ decay has been evaluated. A lack of correlation among the GT transition strengths feeding the same levels from the two different directions is observed. The impact on the 76Ge 2νββ decay nuclear matrix element is discussed.

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DO - 10.1103/PhysRevC.86.014304

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SN - 0556-2813

VL - 86

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

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ER -

The (3He,t) reaction on 76Ge, and the double-β-decay matrix element

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