Advertisement

Zeitschrift für Physik A Hadrons and Nuclei

, Volume 354, Issue 3, pp 301–310 | Cite as

Quantum numbers of26Al levels above 6 MeV excitation energy

  • J. Brenneisen
  • D. Grathwohl
  • B. Ehrhard
  • P. M. Endt
  • S. Fischer
  • M. Lickert
  • R. Ott
  • H. Röpke
  • J. Schmälzlin
  • P. Siedle
  • B. H. Wildenthal
Article
  • 21 Downloads

Abstract

Measurements of resonance strengths and ofγ-ray angular distributions or anisotropies have been performed on selected resonances of the25Mg(p, γ) reaction in the rangeE p=2–4 MeV,E x=8.2−10.1 MeV with an emphasis on high-spin andT=1 analog resonances. EightT=1 states are identified, among them high-spin states at 8747 keV (I=6), 9286 KeV (I=5), and 9986 keV (I π = 7+, 6+). Shell model calculations in thes-d basis space reproduce the branching ratios of these states and clarify the nature of final states. New high-spinT=0 states are observed at 9720 keV (I π = 7+), 8602 keV (I = 6), and 6695 keV (I π = 7+). TheI π assignments to severalE x = 6–8 MeV states are revised and the role of two-particle excitations into thef-p shell is elucidated. A revised spectrum of 73 positive-parity,T = 0 states is compared to the predictions of shell-model calculations in thes-d basis space using the universals-d shell Hamiltonian.

PACS

27.30 + t 21.10 Hw 21.60 Cs 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Endt, P.M.: Nucl. Phys. A521, 1 (1990)ADSCrossRefGoogle Scholar
  2. 2.
    Glatz, F., Norbert, S., Bitterwolf, E., Burkhard, A., Heidinger, F., Kern, Th., Lehmann, R., Röpke, H., Siefert, J., Schneider, C.: Z. Phys. A — Atomic Nuclei324, 187 (1986)CrossRefGoogle Scholar
  3. 3.
    Endt, P.M., de Wit, P., Alderliesten, C., Wildenthal, B.H.: Nucl. Phys. A487, 221 (1988)ADSCrossRefGoogle Scholar
  4. 4.
    Endt, P.M., de Wit, P., Alderliesten, C.: Nucl. Phys. A459, 61 (1986)ADSCrossRefGoogle Scholar
  5. 5.
    Endt, P.M., de Wit, P., Alderliesten, C.: Nucl. Phys. A476, 333 (1988)ADSCrossRefGoogle Scholar
  6. 6.
    Peterson, R.J., Yasue, M., Tanaka, M.H., Hasegawa, T., Nisimura, M., Ohnuma, H., Shimizu, H., Ieki, K., Toyokawa, H., Iwase, M., Iimura, J., Hayakawa, S.I.: Phys. Rev. C38, 1130 (1988)ADSCrossRefGoogle Scholar
  7. 7.
    Iliadis, C., Buchmann, L., Endt, P.M., Herndl, H., Wiescher, M.: submitted to Phys. Rev. CGoogle Scholar
  8. 8.
    Yasue, M., Sato, H., Hasegawa, T., Takamatsu, J., Terakawa, T., Nakagawa, T., Hatori, K., Peterson, R.J.: Phys. Rev. C39, 2159 (1989)ADSGoogle Scholar
  9. 9.
    Betts, R.R., Fortune, H.T., Pullen, D.J.: Nucl. Phys. A299, 412 (1978)ADSCrossRefGoogle Scholar
  10. 10.
    Endt, P.M.: Atomic Data and Nuclear Data Tables55, 171 (1993)ADSCrossRefGoogle Scholar
  11. 11.
    Rose, H.J., Brink, D.M.: Revs. Mod. Phys.39, 306 (1967)ADSCrossRefGoogle Scholar
  12. 12.
    Seth, Kamal K, Soundranayagam R., Saha, A., de Jager, C.W., de Vries, H., Brown, B.A., Wildenthal, B.H.: Phys. Rev. Lett.74, 642 (1995) and to be published.ADSCrossRefGoogle Scholar
  13. 13.
    Wildenthal, B.H.: Progress in Particle and Nuclear Physics11, D.H. Wilkinson (ed.), p. 1, New York Pergamon Press (1984)Google Scholar
  14. 14.
    Brown, B.A., Wildenthal, B.H.: Nucl. Phys. A474, 290 (1987)ADSCrossRefGoogle Scholar
  15. 15.
    Wijekumar, V., Schmalbrock, P., Hausmann, H.J., Donoghue, T.R., Wiescher, M., Suiter, H.R., Browne, C.P., Rollefson, A.A., Tarara, R.W., Nucl. Phys. A436, 561 (1985)ADSCrossRefGoogle Scholar
  16. 16.
    Bansal, R., French, J.: Phys. Lett.11, 145 (1964)ADSCrossRefGoogle Scholar
  17. 17.
    Del Vecchio, R.M., Kouzes, R.T., Sherr, R.: Nucl. Phys. A265, 220 (1976)ADSCrossRefGoogle Scholar
  18. 18.
    Jahn, R., Stahel, D.P., Wozniak, G.J., de Meijer, R.J., Cerny, J.: Phys. Rev. C18, 9 (1978)ADSGoogle Scholar

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • J. Brenneisen
    • 1
  • D. Grathwohl
    • 1
  • B. Ehrhard
    • 1
  • P. M. Endt
    • 2
  • S. Fischer
    • 1
  • M. Lickert
    • 1
  • R. Ott
    • 1
  • H. Röpke
    • 1
  • J. Schmälzlin
    • 1
  • P. Siedle
    • 1
  • B. H. Wildenthal
    • 3
  1. 1.Fakultät für Physik der Universität FreiburgFreiburg i. Br.Germany
  2. 2.R.J. Van de Graaff LaboratoriumRijksuniversiteit UtrechtUtrechtThe Netherlands
  3. 3.Physics Program, School of Natural Sciences and MathematicsThe University of Texas at DallasRichardsonUSA

Personalised recommendations