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21 results on '"Rolander, K. Wilhelmsen"'

1. Decay characteristics of neutron-rich nuclei — new results for 14Be

Author

ISOLDE Collabration, Bergmann, U. C., Borge, M. J. G., Cederkäll, J., Fynbo, H. O. U., Jeppesen, H., Jonson, B., Markenroth, K., Nilsson, T., Nyman, G., Riisager, K., Simon, H., Tengblad, O., Rolander, K. Wilhelmsen, Äystö, Juha, editor, Dendooven, Peter, editor, Jokinen, Ari, editor, and Leino, Matti, editor

Published
2003
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2. β-decay in the A = 9 isobar

Author

ISOLDE collaboration, Tengblad, O., Bergmann, U. C., Borge, M. J. G., Boutami, R., Cederkäll, J., Fraile, L. M., Fynbo, H. O. U., Jeppesen, H., Jonson, B., Markenroth, K., Nilsson, T., Nyman, G., Prezado, Y., Riisager, K., Wenander, F., Rolander, K. Wilhelmsen, Äystö, Juha, editor, Dendooven, Peter, editor, Jokinen, Ari, editor, and Leino, Matti, editor

Published
2003
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4. Search for forbiddenβ-decays of the drip line nucleus12Be

Author

Keller, H., Anne, R., Bazin, D., Bimbot, R., Borge, M. J. G., Corre, J. M., Dogny, S., Emling, H., Guillemaud-Mueller, D., Hansen, P. G., Hornshøj, P., Humbert, F., Jensen, P., Jonson, B., Lewitowicz, M., Mueller, A. C., Neugart, R., Nilsson, T., Nyman, G., Pougheon, F., Saint-Laurent, M. G., Schrieder, G., Sorlin, O., Tengblad, O., and Rolander, K. Wilhelmsen

Published
1994
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5. Clarification of the Three-Body Decay of [Formula presented] (12.71 MeV)

Author

Fynbo, H. O.U., Prezado, Y., Bergmann, U. C., Borge, M. J.G., Dendooven, P., Huang, W. X., Huikari, J., Jeppesen, H., Jones, P., Jonson, B., Meister, M., Nyman, G., Riisager, K., Tengblad, O., Vogelius, I. S., Wang, Y., Weissman, L., Rolander, K. Wilhelmsen, and Äystö, J.

Subjects
Nuclear Experiment
Abstract

Using [Formula presented] decays of a clean source of [Formula presented] produced at the IGISOL facility, we have measured the breakup of the [Formula presented] (12.71 MeV) state into three [Formula presented] particles with a segmented particle detector setup. The high quality of the data permits solving the question of the breakup mechanism of the 12.71 MeV state, a longstanding problem in few-body nuclear physics. Among existing models, a modified sequential model fits the data best, but systematic deviations indicate that a three-body description is needed.

Published
2003
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6. Clarification of the Three-Body Decay of 12C (12.71 MeV)

Author

Fynbo, H. O. U., Prezado, Y., Bergmann, U. C., Borge, M. J. G., Dendooven, Peter, Huang, Wenxue, Huikari, Jussi, Jeppesen, H., Jones, Peter, Jonson, B., Meister, M., Nyman, G., Riisager, K., Tengblad, O., Vogelius, I. S., Wang, Youbao, Weissman, L., Rolander, K. Wilhelmsen, and Äystö, Juha

Subjects
nuclear physics, Nuclear Physics - Experiment, ydinfysiikka
Abstract

Using β decays of a clean source of 12 N produced at the IGISOL facility, we have measured the breakup of the 12 C (12.71 MeV) state into three α particles with a segmented particle detector setup. The high quality of the data permits solving the question of the breakup mechanism of the 12.71 MeV state, a longstanding problem in few-body nuclear physics. Among existing models, a modified sequential model fits the data best, but systematic deviations indicate that a three-body description is needed. peerReviewed

Published
1991

7. Clarification of the Three-Body Decay ofC12(12.71 MeV)

Author

Fynbo, H. O. U., primary, Prezado, Y., additional, Bergmann, U. C., additional, Borge, M. J. G., additional, Dendooven, P., additional, Huang, W. X., additional, Huikari, J., additional, Jeppesen, H., additional, Jones, P., additional, Jonson, B., additional, Meister, M., additional, Nyman, G., additional, Riisager, K., additional, Tengblad, O., additional, Vogelius, I. S., additional, Wang, Y., additional, Weissman, L., additional, Rolander, K. Wilhelmsen, additional, and Äystö, J., additional

Published
2003
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8. PIONIC FUSION STUDIES OF A = 6 HALO NUCLEI

Author

ANDERSSON, M., primary, BARGHOLTZ, CHR., additional, FRANSSON, KJ., additional, FUMERO, E., additional, GERÉN, L., additional, HOLMBERG, L., additional, LINDBERG, K., additional, LINDH, K., additional, MÅRTENSSON, L., additional, SITNIKOVA, I., additional, TEGNÉR, P.-E., additional, WEISS, G., additional, and ROLANDER, K. WILHELMSEN, additional

Published
2003
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10. NEW INFORMATION ON α-CLUSTER STATES IN 12C FROM THE β-DECAY OF 12N

Author

FYNBO, H.O.U., primary, JEPPESEN, H., additional, RIISAGER, K., additional, VOGELIUS, I. STORGAARD, additional, PREZADO, Y., additional, BORGE, M.J.G., additional, TENGBLAD, O., additional, DENDOOVEN, P., additional, HUANG, W., additional, HUIKARI, J., additional, JONES, P., additional, WANG, Y., additional, ÄYSTÖ, J., additional, JONSON, B., additional, MEISTER, M., additional, NYMAN, G., additional, BERGMANN, U.C., additional, WEISSMAN, L., additional, and ROLANDER, K. WILHELMSEN, additional

Published
2002
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11. Beta-delayed multi-particle emission in proton rich nuclei

Author

Borge, M. J. G., primary, Axelsson, L., additional, Äystö, J., additional, Bergmann, U. C., additional, Boutami, R., additional, Deendoven, P., additional, Fraile, L. M., additional, Fynbo, H. O. U., additional, Honkanen, A., additional, Hornshøj, P., additional, Huikari, J., additional, Jokinen, A., additional, Jonson, B., additional, Markenroth, K., additional, Martel, I., additional, Mukha, I., additional, Nilsson, T., additional, Nyman, G., additional, Oinonen, M., additional, Prezado, Y., additional, Riisager, K., additional, Tengblad, O., additional, and Rolander, K. Wilhelmsen, additional

Published
2002
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12. News on Beta Delayed Particle Emission from14Be

Author

Jeppesen, H., primary, Bergmann, U. C., additional, Borge, M. J. G., additional, Cederkäll, J., additional, Fedoseyev, V. N., additional, Fynbo, H. O. U., additional, Hansper, V. Y., additional, Jonson, B., additional, Markenroth, K., additional, Mishin, V. I., additional, Nilsson, T., additional, Nyman, G., additional, Riisager, K., additional, Tengblad, O., additional, Rolander, K. Wilhelmsen, additional, and collaboration, The ISOLDE, additional

Published
2002
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14. NEW INFORMATION ON α-CLUSTER STATES IN 12C FROM THE β-DECAY OF 12N.

Author

FYNBO, H. O. U., JEPPESEN, H., RIISAGER, K., VOGELIUS, I. STORGAARD, PREZADO, Y., BORGE, M. J. G., TENGBLAD, O., DENDOOVEN, P., HUANG, W., HUIKARI, J., JONES, P., WANG, Y., ÄYSTÖ, J., JONSON, B., NYMAN, G., BERGMANN, U. C., WEISSMAN, L., and ROLANDER, K. WILHELMSEN

Subjects
CLUSTER theory (Nuclear physics), CARBON, NITROGEN, BETA decay, ISOTOPES, RADIOACTIVE decay
Published
2002

16. Neutron Momentum Distributions from “Core Break-Up” Reactions of Halo Nuclei

Author

Nilsson, T, primary, Blaich, Th, additional, Borge, M. J. G, additional, Chulkov, L. V, additional, Elze, Th. W, additional, Emling, H, additional, Geissel, H, additional, Grimm, K, additional, Guillemaud-Mueller, D, additional, Hansen, P. G, additional, Holzmann, R, additional, Hornshøj, P, additional, Humbert, F, additional, Irnich, H, additional, Johannsen, L, additional, Jonson, B, additional, Keim, M, additional, Keller, J. G, additional, Klingler, H, additional, Kratz, J. V, additional, Kulessa, R, additional, Lambrecht, D, additional, Leifels, Y, additional, Lewitowicz, M, additional, Magel, A, additional, Mohar, M. F, additional, Mueller, A. C, additional, Münzenberg, G, additional, Neugart, R, additional, Nickel, F, additional, Nyman, G, additional, Richter, A, additional, Riisager, K, additional, Saint-Laurent, M.-G, additional, Scheidenberger, C, additional, Schrieder, G, additional, Schwab, W, additional, Sherrill, B. M, additional, Simon, H, additional, Sorlin, O, additional, Stelzer, K, additional, Stroth, J, additional, Tengblad, O, additional, Wajda, E, additional, Rolander, K. Wilhelmsen, additional, Zinser, M, additional, and Zude, E, additional

Published
1995
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17. Beta decay asymmetry in mirror nuclei: A=9.

Author

Tengblad, Olof, Axelsson, L., Bergmann, U., Borge, M. J. G., Fraile, L. M., Fynbo, H. O. U., Hornshøj, P., Jading, Y., Jonson, B., Nilsson, T., Nyman, G., Markenroth, K., Martel, I., Mukha, I., Riisager, K., Wenander, F., and Rolander, K. Wilhelmsen

Published
1999
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18. Search for forbiddenβ-decays of the drip line nucleus12Be

Author

Keller, H., Anne, R., Bazin, D., Bimbot, R., Borge, M. J. G., Corre, J. M., Dogny, S., Emling, H., Guillemaud-Mueller, D., Hansen, P. G., Hornshøj, P., Humbert, F., Jensen, P., Jonson, B., Lewitowicz, M., Mueller, A. C., Neugart, R., Nilsson, T., Nyman, G., Pougheon, F., Saint-Laurent, M. G., Schrieder, G., Sorlin, O., Tengblad, O., and Rolander, K. Wilhelmsen

Abstract

Beta-coincident?-rays have been measured from implanted pure samples of12Be separated at the LISE3 spectrometer at GANIL. An intensity of 0.040(26) % can be estimated for the branching ratio of the isospin forbidden pure-Fermi transition to the 0+ excited state of12B and of 0.008(6)% of the transition to the 1-1 excited state. Both are taken to represent upper limits. The half-life has been re-measured to be 26.1(2.4) ms.

Published
1994
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19. News on Beta Delayed Particle Emission from 14Be

Author

Jeppesen, H., Bergmann, U. C., Borge, M. J. G., Cederkäll, J., Fedoseyev, V. N., Fynbo, H. O. U., Hansper, V. Y., Jonson, B., Markenroth, K., Mishin, V. I., Nilsson, T., Nyman, G., Riisager, K., Tengblad, O., Rolander, K. Wilhelmsen, and collaboration, The ISOLDE

Abstract

Beta delayed charged particles from 14Be have been measured and give an upper limit on beta delayed alpha particles of B(βα) ≪ 6.7 × 10-5 and a tentative branching ratio on beta delayed tritons of 7.5 ×10-5 ≪ B(βt) ≪ 3.9 ×10-4. We combine the knowledge on beta delayed particles from 14Be to deduce information on the beta strength distribution.

Published
2013
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20. Large asymmetry in the strongest β-transition for A=9.

Author

Prezado, Y., Bergmann, U. C., Borge, M.J.G., Cederkäll, J., Diget, C. Aa., Fraile, L. M., Fynbo, H. O. U., Jeppesen, H., Jonson, B., Meister, M., Nilsson, T., Nyman, G., Riisager, K., Tengblad, O., Weissmann, L., and Rolander, K. Wilhelmsen

Subjects
*BETA decay, *ROTATIONAL motion, *ASYMPTOTIC symmetry (Physics)
Abstract

A new measurement of the β-decay of 9Li has clarified the feeding to the highest accessible states in 9Be. It is found that the β-decay mainly populates the 11.8 MeV state, whose spin is determined as 5/2−. The extracted BGT value of 5.3(0.9) is a factor 4.4(1.0) larger than that of the mirror transition from 9C. A theoretical explanation of such a pronounced β-decay asymmetry is presently lacking. [Copyright &y& Elsevier]

Published
2003
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21. Search for beta-delayed charged particles from the halo nucleus 14Be.

Author

Jeppesen, H., Bergmann, U.C., Borge, M.J.G., Cederkäll, J., Fedoseyev, V.N., Fynbo, H.O.U., Hansper, V.Y., Jonson, B., Markenroth, K., Mishin, V.I., Nilsson, T., Nyman, G., Riisager, K., Tengblad, O., and Rolander, K. Wilhelmsen

Subjects
*PARTICLES (Nuclear physics), *TRITONS (Nuclear physics)
Abstract

In a search for β-delayed charged particles from 14Be we have obtained an upper limit on β-delayed α particles, B(βα)<.2×10−4, and found evidence for β-delayed tritons at intensity of 6×10−5

Published
2002
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