Precise branching ratios to unbound 12C states from 12N and 12B β-decays

S. Hyldegaard; C. Forssén; C. Aa Diget; M. Alcorta; F. C. Barker; B. Bastin; M. J.G. Borge; R. Boutami; S. Brandenburg; J. Büscher; P. Dendooven; P. Van Duppen; T. Eronen; S. Fox; B. R. Fulton; H. O.U. Fynbo; J. Huikari; M. Huyse; H. B. Jeppesen; A. Jokinen; B. Jonson; K. Jungmann; A. Kankainen; O. Kirsebom; M. Madurga; I. Moore; P. Navrátil; T. Nilsson; G. Nyman; G. J.G. Onderwater; H. Penttilä; K. Peräjärvi; R. Raabe; K. Riisager; S. Rinta-Antila; A. Rogachevskiy; A. Saastamoinen; M. Sohani; O. Tengblad; E. Traykov; J. P. Vary; Y. Wang; K. Wilhelmsen; H. W. Wilschut; J. Äystö

doi:10.1016/j.physletb.2009.06.064

Precise branching ratios to unbound ¹²C states from ¹²N and ¹²B β-decays

S. Hyldegaard
, C. Forssén
, C. Aa Diget
, M. Alcorta
, F. C. Barker
, B. Bastin
, M. J.G. Borge
, R. Boutami
, S. Brandenburg
, J. Büscher
, P. Dendooven
, P. Van Duppen
, T. Eronen
, S. Fox
, B. R. Fulton
, H. O.U. Fynbo^*
, J. Huikari
, M. Huyse
, H. B. Jeppesen
, A. Jokinen

B. Jonson, K. Jungmann, A. Kankainen, O. Kirsebom, M. Madurga, I. Moore, P. Navrátil, T. Nilsson, G. Nyman, G. J.G. Onderwater, H. Penttilä, K. Peräjärvi, R. Raabe, K. Riisager, S. Rinta-Antila, A. Rogachevskiy, A. Saastamoinen, M. Sohani, O. Tengblad, E. Traykov, J. P. Vary, Y. Wang, K. Wilhelmsen, H. W. Wilschut, J. Äystö

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in ¹²C from ¹²N and ¹²B β-decays. In the first the three α-particles emitted after β-decay are measured in coincidence in separate detectors, while in the second method ¹²N and ¹²B are implanted in a detector and the summed energy of the three α-particles is measured directly. For the narrow states at 7.654 MeV (0⁺) and 12.71 MeV (1⁺) the resulting branching ratios are both smaller than previous measurements by a factor of ≃2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.

Original language	English
Pages (from-to)	459-464
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	678
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2009.06.064
Publication status	Published - 3 Aug 2009

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10.1016/j.physletb.2009.06.064

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Hyldegaard, S., Forssén, C., Diget, C. A., Alcorta, M., Barker, F. C., Bastin, B., Borge, M. J. G., Boutami, R., Brandenburg, S., Büscher, J., Dendooven, P., Van Duppen, P., Eronen, T., Fox, S., Fulton, B. R., Fynbo, H. O. U., Huikari, J., Huyse, M., Jeppesen, H. B., ... Äystö, J. (2009). Precise branching ratios to unbound ¹²C states from ¹²N and ¹²B β-decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 678(5), 459-464. https://doi.org/10.1016/j.physletb.2009.06.064

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title = "Precise branching ratios to unbound 12C states from 12N and 12B β-decays",

abstract = "Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in 12C from 12N and 12B β-decays. In the first the three α-particles emitted after β-decay are measured in coincidence in separate detectors, while in the second method 12N and 12B are implanted in a detector and the summed energy of the three α-particles is measured directly. For the narrow states at 7.654 MeV (0+) and 12.71 MeV (1+) the resulting branching ratios are both smaller than previous measurements by a factor of ≃2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.",

author = "S. Hyldegaard and C. Forss{\'e}n and Diget, \{C. Aa\} and M. Alcorta and Barker, \{F. C.\} and B. Bastin and Borge, \{M. J.G.\} and R. Boutami and S. Brandenburg and J. B{\"u}scher and P. Dendooven and \{Van Duppen\}, P. and T. Eronen and S. Fox and Fulton, \{B. R.\} and Fynbo, \{H. O.U.\} and J. Huikari and M. Huyse and Jeppesen, \{H. B.\} and A. Jokinen and B. Jonson and K. Jungmann and A. Kankainen and O. Kirsebom and M. Madurga and I. Moore and P. Navr{\'a}til and T. Nilsson and G. Nyman and Onderwater, \{G. J.G.\} and H. Penttil{\"a} and K. Per{\"a}j{\"a}rvi and R. Raabe and K. Riisager and S. Rinta-Antila and A. Rogachevskiy and A. Saastamoinen and M. Sohani and O. Tengblad and E. Traykov and Vary, \{J. P.\} and Y. Wang and K. Wilhelmsen and Wilschut, \{H. W.\} and J. {\"A}yst{\"o}",

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doi = "10.1016/j.physletb.2009.06.064",

language = "English",

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journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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Hyldegaard, S, Forssén, C, Diget, CA, Alcorta, M, Barker, FC, Bastin, B, Borge, MJG, Boutami, R, Brandenburg, S, Büscher, J, Dendooven, P, Van Duppen, P, Eronen, T, Fox, S, Fulton, BR, Fynbo, HOU, Huikari, J, Huyse, M, Jeppesen, HB, Jokinen, A, Jonson, B, Jungmann, K, Kankainen, A, Kirsebom, O, Madurga, M, Moore, I, Navrátil, P, Nilsson, T, Nyman, G, Onderwater, GJG, Penttilä, H, Peräjärvi, K, Raabe, R, Riisager, K, Rinta-Antila, S, Rogachevskiy, A, Saastamoinen, A, Sohani, M, Tengblad, O, Traykov, E, Vary, JP, Wang, Y, Wilhelmsen, K, Wilschut, HW & Äystö, J 2009, 'Precise branching ratios to unbound ¹²C states from ¹²N and ¹²B β-decays', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 678, no. 5, pp. 459-464. https://doi.org/10.1016/j.physletb.2009.06.064

TY - JOUR

T1 - Precise branching ratios to unbound 12C states from 12N and 12B β-decays

AU - Hyldegaard, S.

AU - Forssén, C.

AU - Diget, C. Aa

AU - Alcorta, M.

AU - Barker, F. C.

AU - Bastin, B.

AU - Borge, M. J.G.

AU - Boutami, R.

AU - Brandenburg, S.

AU - Büscher, J.

AU - Dendooven, P.

AU - Van Duppen, P.

AU - Eronen, T.

AU - Fox, S.

AU - Fulton, B. R.

AU - Fynbo, H. O.U.

AU - Huikari, J.

AU - Huyse, M.

AU - Jeppesen, H. B.

AU - Jokinen, A.

AU - Jonson, B.

AU - Jungmann, K.

AU - Kankainen, A.

AU - Kirsebom, O.

AU - Madurga, M.

AU - Moore, I.

AU - Navrátil, P.

AU - Nilsson, T.

AU - Nyman, G.

AU - Onderwater, G. J.G.

AU - Penttilä, H.

AU - Peräjärvi, K.

AU - Raabe, R.

AU - Riisager, K.

AU - Rinta-Antila, S.

AU - Rogachevskiy, A.

AU - Saastamoinen, A.

AU - Sohani, M.

AU - Tengblad, O.

AU - Traykov, E.

AU - Vary, J. P.

AU - Wang, Y.

AU - Wilhelmsen, K.

AU - Wilschut, H. W.

AU - Äystö, J.

PY - 2009/8/3

Y1 - 2009/8/3

N2 - Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in 12C from 12N and 12B β-decays. In the first the three α-particles emitted after β-decay are measured in coincidence in separate detectors, while in the second method 12N and 12B are implanted in a detector and the summed energy of the three α-particles is measured directly. For the narrow states at 7.654 MeV (0+) and 12.71 MeV (1+) the resulting branching ratios are both smaller than previous measurements by a factor of ≃2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.

AB - Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in 12C from 12N and 12B β-decays. In the first the three α-particles emitted after β-decay are measured in coincidence in separate detectors, while in the second method 12N and 12B are implanted in a detector and the summed energy of the three α-particles is measured directly. For the narrow states at 7.654 MeV (0+) and 12.71 MeV (1+) the resulting branching ratios are both smaller than previous measurements by a factor of ≃2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.

UR - https://www.scopus.com/pages/publications/67749139777

U2 - 10.1016/j.physletb.2009.06.064

DO - 10.1016/j.physletb.2009.06.064

M3 - Article

SN - 0370-2693

VL - 678

SP - 459

EP - 464

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 5

ER -

Precise branching ratios to unbound ¹²C states from ¹²N and ¹²B β-decays

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