Beta-delayed multiparticle emission studies at ISOL-type facilities

M.J.G. Borge; U.C. Bergmann; R. Boutami; J. Cederkäll; P.G. Dendooven; L.M. Fraile; H.O.U. Fynbo; W. Huang; J. Huikari; Y. Jading; H. Jeppesen; A. Jokinen; B. Jonson; I. Martel; Melanie Meister; T. Nilsson; G. Nyman; Y. Prezado; K. Riisager; O. Tengblad; L. Weissman; K. Wilhemsen; J. Aysto

Beta-delayed multiparticle emission studies at ISOL-type facilities

M.J.G. Borge, U.C. Bergmann, R. Boutami, J. Cederkäll, P.G. Dendooven, L.M. Fraile, H.O.U. Fynbo, W. Huang, J. Huikari, Y. Jading, H. Jeppesen, A. Jokinen, B. Jonson, I. Martel, Melanie Meister, T. Nilsson, G. Nyman, Y. Prezado, K. Riisager, O. TengbladL. Weissman, K. Wilhemsen, J. Aysto

University of Groningen

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Abstract

We report here on the recent β-decay studies made at ISOL-type Facilities to determine
the multiparticle breakup mechanism of excited states in light nuclei by studying them in
full kinematics. In particular the results obtained for the A = 9 isobars and the breakup
of the 12.7 MeV state in 12C of unnatural parity are discussed. The breakup of the latter
has been debated since more than a decade. Mirror beta transitions in the A=9 chain are
compared and a large asymmetry factor is deduced for the transitions to high excitation
energy in 9Be (11.8 MeV) and 9B (12.2 MeV) fed in the β-decay of 9Li and 9C respectively.
It is shown that the asymmetry is not due to experimental problems or differences in the
mechanisms of breakup or in the spin of the states. As no asymmetry is found in the gs
to gs transition it must be due to the particular structure of these excited states. The
controversy on the breakup mechanism of the 12.7 MeV state is resolved.

Original language	English
Pages (from-to)	243c-247c
Number of pages	5
Journal	Nuclear Physics A
Volume	746
Publication status	Published - 2004

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Borge, M. J. G., Bergmann, U. C., Boutami, R., Cederkäll, J., Dendooven, P. G., Fraile, L. M., Fynbo, H. O. U., Huang, W., Huikari, J., Jading, Y., Jeppesen, H., Jokinen, A., Jonson, B., Martel, I., Meister, M., Nilsson, T., Nyman, G., Prezado, Y., Riisager, K., ... Aysto, J. (2004). Beta-delayed multiparticle emission studies at ISOL-type facilities. Nuclear Physics A, 746, 243c-247c.

@article{fb70597e378a4b499c970d494a03f22c,

title = "Beta-delayed multiparticle emission studies at ISOL-type facilities",

abstract = "We report here on the recent β-decay studies made at ISOL-type Facilities to determinethe multiparticle breakup mechanism of excited states in light nuclei by studying them infull kinematics. In particular the results obtained for the A = 9 isobars and the breakupof the 12.7 MeV state in 12C of unnatural parity are discussed. The breakup of the latterhas been debated since more than a decade. Mirror beta transitions in the A=9 chain arecompared and a large asymmetry factor is deduced for the transitions to high excitationenergy in 9Be (11.8 MeV) and 9B (12.2 MeV) fed in the β-decay of 9Li and 9C respectively.It is shown that the asymmetry is not due to experimental problems or differences in themechanisms of breakup or in the spin of the states. As no asymmetry is found in the gsto gs transition it must be due to the particular structure of these excited states. Thecontroversy on the breakup mechanism of the 12.7 MeV state is resolved.",

author = "M.J.G. Borge and U.C. Bergmann and R. Boutami and J. Cederk{\"a}ll and P.G. Dendooven and L.M. Fraile and H.O.U. Fynbo and W. Huang and J. Huikari and Y. Jading and H. Jeppesen and A. Jokinen and B. Jonson and I. Martel and Melanie Meister and T. Nilsson and G. Nyman and Y. Prezado and K. Riisager and O. Tengblad and L. Weissman and K. Wilhemsen and J. Aysto",

year = "2004",

language = "English",

volume = "746",

pages = "243c--247c",

journal = "Nuclear Physics A",

publisher = "ELSEVIER SCIENCE BV",

}

Borge, MJG, Bergmann, UC, Boutami, R, Cederkäll, J, Dendooven, PG, Fraile, LM, Fynbo, HOU, Huang, W, Huikari, J, Jading, Y, Jeppesen, H, Jokinen, A, Jonson, B, Martel, I, Meister, M, Nilsson, T, Nyman, G, Prezado, Y, Riisager, K, Tengblad, O, Weissman, L, Wilhemsen, K & Aysto, J 2004, 'Beta-delayed multiparticle emission studies at ISOL-type facilities', Nuclear Physics A, vol. 746, pp. 243c-247c.

TY - JOUR

T1 - Beta-delayed multiparticle emission studies at ISOL-type facilities

AU - Borge, M.J.G.

AU - Bergmann, U.C.

AU - Boutami, R.

AU - Cederkäll, J.

AU - Dendooven, P.G.

AU - Fraile, L.M.

AU - Fynbo, H.O.U.

AU - Huang, W.

AU - Huikari, J.

AU - Jading, Y.

AU - Jeppesen, H.

AU - Jokinen, A.

AU - Jonson, B.

AU - Martel, I.

AU - Meister, Melanie

AU - Nilsson, T.

AU - Nyman, G.

AU - Prezado, Y.

AU - Riisager, K.

AU - Tengblad, O.

AU - Weissman, L.

AU - Wilhemsen, K.

AU - Aysto, J.

PY - 2004

Y1 - 2004

N2 - We report here on the recent β-decay studies made at ISOL-type Facilities to determinethe multiparticle breakup mechanism of excited states in light nuclei by studying them infull kinematics. In particular the results obtained for the A = 9 isobars and the breakupof the 12.7 MeV state in 12C of unnatural parity are discussed. The breakup of the latterhas been debated since more than a decade. Mirror beta transitions in the A=9 chain arecompared and a large asymmetry factor is deduced for the transitions to high excitationenergy in 9Be (11.8 MeV) and 9B (12.2 MeV) fed in the β-decay of 9Li and 9C respectively.It is shown that the asymmetry is not due to experimental problems or differences in themechanisms of breakup or in the spin of the states. As no asymmetry is found in the gsto gs transition it must be due to the particular structure of these excited states. Thecontroversy on the breakup mechanism of the 12.7 MeV state is resolved.

AB - We report here on the recent β-decay studies made at ISOL-type Facilities to determinethe multiparticle breakup mechanism of excited states in light nuclei by studying them infull kinematics. In particular the results obtained for the A = 9 isobars and the breakupof the 12.7 MeV state in 12C of unnatural parity are discussed. The breakup of the latterhas been debated since more than a decade. Mirror beta transitions in the A=9 chain arecompared and a large asymmetry factor is deduced for the transitions to high excitationenergy in 9Be (11.8 MeV) and 9B (12.2 MeV) fed in the β-decay of 9Li and 9C respectively.It is shown that the asymmetry is not due to experimental problems or differences in themechanisms of breakup or in the spin of the states. As no asymmetry is found in the gsto gs transition it must be due to the particular structure of these excited states. Thecontroversy on the breakup mechanism of the 12.7 MeV state is resolved.

M3 - Article

VL - 746

SP - 243c-247c

JO - Nuclear Physics A

JF - Nuclear Physics A

ER -

Beta-delayed multiparticle emission studies at ISOL-type facilities

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