Abstract
The (3He,d) and (α, t) reactions on targets of146Nd and148Sm have been studied, using beams of 24 MeV3He and 27 MeV4He from the McMaster University tandem van de Graaff accelerator. Also the (t, α) reaction on a target of148Sm has been studied, using 17 MeV tritons from the Los Alamos Scientific Laboratory tandem accelerator. The reaction products were analyzed with magnetic spectrographs. Information on thel-values was obtained from (3He,d) angular distributions and from ratios of (α,t) and (3He,d) cross sections. In each nucleus a severe fragmentation of the shell-model strength is found. In particular a total of 13(7)l=2 transitions and 6(6)l=0 transitions have been identified in147Pm(149Eu). The results are analyzed in terms of the spherical shell model, which accounts fairly well for the summed spectroscopic strengths. However, with the existence of the (t, α) data a more detailed investigation of the emptiness of individual levels observed in147Pm gives some indication that a deformed scheme might be more successful in describing these nuclei.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Fleissner, J.G., Funk, E.G., Venezia, F.P., Mihelich, J.W.: Phys. Rev. C16, 227 (1977)
Kortelahti, M., Pakkanen, A., Piiparinen, M., Komppa, T., Komer, R.: Nucl. Phys. A288, 365 (1977)
Al-Janabi, T., Hamilton, W.D., Warner, D.D.: J. Phys. G: Nucl. Phys.3, 1415 (1977)
Taketani, H., Sharma, H.L., Hintz, N.M.: Phys. Rev. C12, 108 (1975)
Aleksandrov, V.S., Vylov, Ts., Gromova, I.I., Klyuchnikov, A.A., Nogorodov, A.F., Feoktistov, A.I.: Bull. Acad. Sci. USSR Phys. Ser.39, No. 3, 9 (1975)
Nakayama, H., Chiba, J., Sekimoto, M., Nakai, K.: Nucl. Phys. A293, 137 (1977)
Kunz, P.D.: Computer code DWUCK. University of Colorado, unpublished, 1969
Straume, O., Løvhøiden, G., Burke, D.G.: Nucl. Phys. A266, 390 (1976)
Løvhøiden, G., Burke, D.G., Hirning, C.R., Flynn, E.R., Sunier, J.W.: Nucl. Phys. A303, 1 (1978)
Rekstad, J.: Nucl. Phys. A247, 7 (1975)
Guttormsen, M., Osnes, E., Rekstad, J., Løvhøiden, G., Straume, O.: Nucl. Phys. A298, 122 (1978)
Straume, O., Løvhøiden, G., Shahabudin, M.A.M., Burke, D.G., Waddington, J.C.: McMaster Accelerator Laboratory Annual Report 88 (1977)
Author information
Authors and Affiliations
Additional information
The authors are grateful for the opportunity to use the facilities at the Los Alamos Scientific Laboratories and would like to thank E. Flynn and S. Orbeson for assistance with the (t,α) experiments. Financial support for this work was provided by the National Research Council of Canada and in part by Norges Almenviten-skapelige Forskningsråd and is gratefully acknowledged.
Rights and permissions
About this article
Cite this article
Straume, O., Løvhøiden, G. & Burke, D.G. Proton states in theN = 86 nuclei147Pm and149Eu populated in the (3He,d), (α,t) and (t, α) reactions. Z Physik A 290, 67–80 (1979). https://doi.org/10.1007/BF01408481
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01408481