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Title: Coulomb Excitation of 26Ne

Abstract

Coulomb excitation of the exotic neutron-rich nucleus 26Ne on a 208Pb target was measured at 58 A.MeV in order to search for low-lying E1 strength above the neutron emission threshold. Data were also taken on an Al target to estimate the nuclear contribution. The radioactive beam was produced by fragmentation of a 95 A.MeV Ar beam delivered by the RIKEN Research Facility. The set-up included a NaI gamma-ray array, a charged fragment hodoscope and a neutron wall. Using the invariant mass method in the 25Ne+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV excitation energy. By performing a multipole decomposition of the differential cross-section, a reduced dipole transition probability of B(E1)=0.49{+-}0.16 e2fm2 is deduced. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is measured.

Authors:
; ; ; ;  [1];  [1];  [2]; ; ; ; ; ; ; ; ;  [3];  [4]; ; ; more »;  [5] « less
  1. Instiut de physique nucleaire, 15 rue G.Clemenceau 91406 Orsay cedex (France)
  2. (Japan)
  3. RIKEN, Heavy-Ion science lab., 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
  4. Institute of Nuclear Research of the Hungarian Academy of Sciences, PO Box 51, H-4001 Debrecen (Hungary)
  5. Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan) (and others)
Publication Date:
OSTI Identifier:
21056739
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 891; Journal Issue: 1; Conference: 6. Symposium on nuclear physics, Tours (France), 5-8 Sep 2006; Other Information: DOI: 10.1063/1.2713517; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COULOMB EXCITATION; DIFFERENTIAL CROSS SECTIONS; E1-TRANSITIONS; GAMMA RADIATION; HEAVY ION REACTIONS; JAPANESE ORGANIZATIONS; LEAD 208; LEAD 208 TARGET; MEV RANGE; NAI DETECTORS; NEON 25; NEON 26; NEUTRON EMISSION; NEUTRON-RICH ISOTOPES; NEUTRONS; NUCLEAR FRAGMENTATION; NUCLEAR FRAGMENTS; PROBABILITY

Citation Formats

Beaumel, D., Blumenfeld, Y., Fortier, S., Frascaria, N., Lima, V., Gibelin, J., Department of Physics, Rikkyo university, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Motobayashi, T., Aoi, N., Baba, H., Fukuda, N., Gomi, T., Kubo, T., Takeuchi, S., Yanagisawa, Y., Yoshida, K., Elekes, Z., Ishikawa, K., Kondo, Y., Nakamura, T., and Satou, Y. Coulomb Excitation of 26Ne. United States: N. p., 2007. Web. doi:10.1063/1.2713517.
Beaumel, D., Blumenfeld, Y., Fortier, S., Frascaria, N., Lima, V., Gibelin, J., Department of Physics, Rikkyo university, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Motobayashi, T., Aoi, N., Baba, H., Fukuda, N., Gomi, T., Kubo, T., Takeuchi, S., Yanagisawa, Y., Yoshida, K., Elekes, Z., Ishikawa, K., Kondo, Y., Nakamura, T., & Satou, Y. Coulomb Excitation of 26Ne. United States. doi:10.1063/1.2713517.
Beaumel, D., Blumenfeld, Y., Fortier, S., Frascaria, N., Lima, V., Gibelin, J., Department of Physics, Rikkyo university, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Motobayashi, T., Aoi, N., Baba, H., Fukuda, N., Gomi, T., Kubo, T., Takeuchi, S., Yanagisawa, Y., Yoshida, K., Elekes, Z., Ishikawa, K., Kondo, Y., Nakamura, T., and Satou, Y. Mon . "Coulomb Excitation of 26Ne". United States. doi:10.1063/1.2713517.
@article{osti_21056739,
title = {Coulomb Excitation of 26Ne},
author = {Beaumel, D. and Blumenfeld, Y. and Fortier, S. and Frascaria, N. and Lima, V. and Gibelin, J. and Department of Physics, Rikkyo university, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501 and Motobayashi, T. and Aoi, N. and Baba, H. and Fukuda, N. and Gomi, T. and Kubo, T. and Takeuchi, S. and Yanagisawa, Y. and Yoshida, K. and Elekes, Z. and Ishikawa, K. and Kondo, Y. and Nakamura, T. and Satou, Y.},
abstractNote = {Coulomb excitation of the exotic neutron-rich nucleus 26Ne on a 208Pb target was measured at 58 A.MeV in order to search for low-lying E1 strength above the neutron emission threshold. Data were also taken on an Al target to estimate the nuclear contribution. The radioactive beam was produced by fragmentation of a 95 A.MeV Ar beam delivered by the RIKEN Research Facility. The set-up included a NaI gamma-ray array, a charged fragment hodoscope and a neutron wall. Using the invariant mass method in the 25Ne+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV excitation energy. By performing a multipole decomposition of the differential cross-section, a reduced dipole transition probability of B(E1)=0.49{+-}0.16 e2fm2 is deduced. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is measured.},
doi = {10.1063/1.2713517},
journal = {AIP Conference Proceedings},
number = 1,
volume = 891,
place = {United States},
year = {Mon Feb 26 00:00:00 EST 2007},
month = {Mon Feb 26 00:00:00 EST 2007}
}