The European Physical Journal A

, Volume 36, Issue 1, pp 1–5 | Cite as

A study of the proton resonant property in 22Mg by elastic scattering of 21Na + p and its astrophysical implication in the 18Ne(α, p)21Na reaction rate

  • J. J. He
  • S. Kubono
  • T. Teranishi
  • M. Notani
  • H. Baba
  • S. Nishimura
  • J. Y. Moon
  • M. Nishimura
  • S. Michimasa
  • H. Iwasaki
  • Y. Yanagisawa
  • N. Hokoiwa
  • M. Kibe
  • J. H. Lee
  • S. Kato
  • Y. Gono
  • C. S. Lee
Open Access
Letter

Abstract.

Proton resonances in 22Mg have been investigated by the resonant elastic scattering of 21 Na + p . The 21Na beam with a mean energy of 4.00 MeV/nucleon was separated by the CNS radioactive-ion-beam separator (CRIB) and bombarded a thick ( CH2 n target. The energy spectra of recoiled protons were measured at scattering angles of θc.m. ≈ 172° , 146° , respectively. Several excited states observed before have been confirmed including two states (at 6.616, 6.796 MeV) observed at TRIUMF. A new state at 7.06 MeV has been observed, and another new one at 7.28 MeV is tentatively identified due to its low statistics. The proton resonant parameters were deduced from an R -matrix analysis of the differential cross-section data with a SAMMY-M6-BETA code. The astrophysical implication for the 18 Ne(α, p)21 Na reaction has been briefly discussed.

PACS.

25.60.-t Reaction induced by unstable nuclei 23.50.+z Decay by proton emission 26.50.+x Nuclear physics aspects of novae, supernovae, and other explosive environments 

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Copyright information

© The Author(s) 2008

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • J. J. He
    • 1
  • S. Kubono
    • 1
  • T. Teranishi
    • 2
  • M. Notani
    • 1
  • H. Baba
    • 1
  • S. Nishimura
    • 3
  • J. Y. Moon
    • 4
  • M. Nishimura
    • 3
  • S. Michimasa
    • 1
  • H. Iwasaki
    • 3
  • Y. Yanagisawa
    • 3
  • N. Hokoiwa
    • 2
  • M. Kibe
    • 2
  • J. H. Lee
    • 4
  • S. Kato
    • 5
  • Y. Gono
    • 2
  • C. S. Lee
    • 4
  1. 1.Center for Nuclear StudyUniversity of Tokyo (CNS)Wako, SaitamaJapan
  2. 2.Department of PhysicsKyushu UniversityFukuokaJapan
  3. 3.RIKEN (The Institute of Physical and Chemical Research)Wako, SaitamaJapan
  4. 4.Department of PhysicsChung-Ang UniversitySeoulRepublic of Korea
  5. 5.Department of PhysicsYamagata UniversityYamagataJapan

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