Gamow-Teller strengths in the A=14 multiplet: A challenge to the shell model

A. Negret; T. Adachi; B. R. Barrett; C. Bäumer; A. M. Van Den Berg; G. P.A. Berg; P. Von Brentano; D. Frekers; D. De Frenne; H. Fujita; K. Fujita; Y. Fujita; E. W. Grewe; P. Haefner; M. N. Harakeh; K. Hatanaka; K. Heyde; M. Hunyadi; E. Jacobs; Y. Kalmykov; A. Korff; K. Nakanishi; P. Navrátil; P. Von Neumann-Cosel; L. Popescu; S. Rakers; A. Richter; N. Ryezayeva; Y. Sakemi; A. Shevchenko; Y. Shimbara; Y. Shimizu; Y. Tameshige; A. Tamii; M. Uchida; J. Vary; H. J. Wörtche; M. Yosoi; L. Zamick

doi:10.1103/PhysRevLett.97.062502

Gamow-Teller strengths in the A=14 multiplet: A challenge to the shell model

A. Negret, T. Adachi, B. R. Barrett, C. Bäumer, A. M. Van Den Berg, G. P.A. Berg, P. Von Brentano, D. Frekers, D. De Frenne, H. Fujita, K. Fujita, Y. Fujita, E. W. Grewe, P. Haefner, M. N. Harakeh, K. Hatanaka, K. Heyde, M. Hunyadi, E. Jacobs, Y. KalmykovA. Korff, K. Nakanishi, P. Navrátil, P. Von Neumann-Cosel, L. Popescu, S. Rakers, A. Richter, N. Ryezayeva, Y. Sakemi, A. Shevchenko, Y. Shimbara, Y. Shimizu, Y. Tameshige, A. Tamii, M. Uchida, J. Vary, H. J. Wörtche, M. Yosoi, L. Zamick

Physics

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Abstract

A new experimental approach to the famous problem of the anomalously slow Gamow-Teller (GT) transitions in the β decay of the A=14 multiplet is presented. The GT strength distributions to excited states in C14 and O14 were studied in high-resolution (d,He2) and (He3,t) charge-exchange reactions on N14. No-core shell-model calculations capable of reproducing the suppression of the β decays predict a selective excitation of Jπ=2+ states. The experimental confirmation represents a validation of the assumptions about the underlying structure of the N14 ground state wave function. However, the fragmentation of the GT strength over three 2+ final states remains a fundamental issue not explained by the present no-core shell model using a 6 ω model space, suggesting possibly the need to include cluster structure in these light nuclei in a consistent way.

Original language	English (US)
Article number	062502
Journal	Physical review letters
Volume	97
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.97.062502
State	Published - 2006

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.97.062502

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Negret, A., Adachi, T., Barrett, B. R., Bäumer, C., Van Den Berg, A. M., Berg, G. P. A., Von Brentano, P., Frekers, D., De Frenne, D., Fujita, H., Fujita, K., Fujita, Y., Grewe, E. W., Haefner, P., Harakeh, M. N., Hatanaka, K., Heyde, K., Hunyadi, M., Jacobs, E., ... Zamick, L. (2006). Gamow-Teller strengths in the A=14 multiplet: A challenge to the shell model. Physical review letters, 97(6), Article 062502. https://doi.org/10.1103/PhysRevLett.97.062502

Negret, A, Adachi, T, Barrett, BR, Bäumer, C, Van Den Berg, AM, Berg, GPA, Von Brentano, P, Frekers, D, De Frenne, D, Fujita, H, Fujita, K, Fujita, Y, Grewe, EW, Haefner, P, Harakeh, MN, Hatanaka, K, Heyde, K, Hunyadi, M, Jacobs, E, Kalmykov, Y, Korff, A, Nakanishi, K, Navrátil, P, Von Neumann-Cosel, P, Popescu, L, Rakers, S, Richter, A, Ryezayeva, N, Sakemi, Y, Shevchenko, A, Shimbara, Y, Shimizu, Y, Tameshige, Y, Tamii, A, Uchida, M, Vary, J, Wörtche, HJ, Yosoi, M & Zamick, L 2006, 'Gamow-Teller strengths in the A=14 multiplet: A challenge to the shell model', Physical review letters, vol. 97, no. 6, 062502. https://doi.org/10.1103/PhysRevLett.97.062502

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title = "Gamow-Teller strengths in the A=14 multiplet: A challenge to the shell model",

abstract = "A new experimental approach to the famous problem of the anomalously slow Gamow-Teller (GT) transitions in the β decay of the A=14 multiplet is presented. The GT strength distributions to excited states in C14 and O14 were studied in high-resolution (d,He2) and (He3,t) charge-exchange reactions on N14. No-core shell-model calculations capable of reproducing the suppression of the β decays predict a selective excitation of Jπ=2+ states. The experimental confirmation represents a validation of the assumptions about the underlying structure of the N14 ground state wave function. However, the fragmentation of the GT strength over three 2+ final states remains a fundamental issue not explained by the present no-core shell model using a 6 ω model space, suggesting possibly the need to include cluster structure in these light nuclei in a consistent way.",

author = "A. Negret and T. Adachi and Barrett, {B. R.} and C. B{\"a}umer and {Van Den Berg}, {A. M.} and Berg, {G. P.A.} and {Von Brentano}, P. and D. Frekers and {De Frenne}, D. and H. Fujita and K. Fujita and Y. Fujita and Grewe, {E. W.} and P. Haefner and Harakeh, {M. N.} and K. Hatanaka and K. Heyde and M. Hunyadi and E. Jacobs and Y. Kalmykov and A. Korff and K. Nakanishi and P. Navr{\'a}til and {Von Neumann-Cosel}, P. and L. Popescu and S. Rakers and A. Richter and N. Ryezayeva and Y. Sakemi and A. Shevchenko and Y. Shimbara and Y. Shimizu and Y. Tameshige and A. Tamii and M. Uchida and J. Vary and W{\"o}rtche, {H. J.} and M. Yosoi and L. Zamick",

year = "2006",

doi = "10.1103/PhysRevLett.97.062502",

language = "English (US)",

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T2 - A challenge to the shell model

AU - Negret, A.

AU - Adachi, T.

AU - Barrett, B. R.

AU - Bäumer, C.

AU - Van Den Berg, A. M.

AU - Berg, G. P.A.

AU - Von Brentano, P.

AU - Frekers, D.

AU - De Frenne, D.

AU - Fujita, H.

AU - Fujita, K.

AU - Fujita, Y.

AU - Grewe, E. W.

AU - Haefner, P.

AU - Harakeh, M. N.

AU - Hatanaka, K.

AU - Heyde, K.

AU - Hunyadi, M.

AU - Jacobs, E.

AU - Kalmykov, Y.

AU - Korff, A.

AU - Nakanishi, K.

AU - Navrátil, P.

AU - Von Neumann-Cosel, P.

AU - Popescu, L.

AU - Rakers, S.

AU - Richter, A.

AU - Ryezayeva, N.

AU - Sakemi, Y.

AU - Shevchenko, A.

AU - Shimbara, Y.

AU - Shimizu, Y.

AU - Tameshige, Y.

AU - Tamii, A.

AU - Uchida, M.

AU - Vary, J.

AU - Wörtche, H. J.

AU - Yosoi, M.

AU - Zamick, L.

PY - 2006

Y1 - 2006

N2 - A new experimental approach to the famous problem of the anomalously slow Gamow-Teller (GT) transitions in the β decay of the A=14 multiplet is presented. The GT strength distributions to excited states in C14 and O14 were studied in high-resolution (d,He2) and (He3,t) charge-exchange reactions on N14. No-core shell-model calculations capable of reproducing the suppression of the β decays predict a selective excitation of Jπ=2+ states. The experimental confirmation represents a validation of the assumptions about the underlying structure of the N14 ground state wave function. However, the fragmentation of the GT strength over three 2+ final states remains a fundamental issue not explained by the present no-core shell model using a 6 ω model space, suggesting possibly the need to include cluster structure in these light nuclei in a consistent way.

AB - A new experimental approach to the famous problem of the anomalously slow Gamow-Teller (GT) transitions in the β decay of the A=14 multiplet is presented. The GT strength distributions to excited states in C14 and O14 were studied in high-resolution (d,He2) and (He3,t) charge-exchange reactions on N14. No-core shell-model calculations capable of reproducing the suppression of the β decays predict a selective excitation of Jπ=2+ states. The experimental confirmation represents a validation of the assumptions about the underlying structure of the N14 ground state wave function. However, the fragmentation of the GT strength over three 2+ final states remains a fundamental issue not explained by the present no-core shell model using a 6 ω model space, suggesting possibly the need to include cluster structure in these light nuclei in a consistent way.

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JF - Physical review letters

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ER -

Gamow-Teller strengths in the A=14 multiplet: A challenge to the shell model

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