Abstract
The150Sm(t,α)149Pm reaction was studied using 17MeV polarized tritons from the tandem Van de Graaff accelerator at the Los Alamos Scientific Laboratory. The alpha particles were analyzed using a Q3D magnetic spectrometer and detected with a helicalcathode position-sensitive counter. The overall resolution was ∼25 keV FWHM. In the present study many of the previous spin assignments have been confirmed, and some ambiguities in earlier studies have been resolved. The important levels at 416 and 751 keV that are strongly populated in the stripping reactions are shown to be 3/2+. Also new fragments of theg 7/2 andd 3/2 shell model states have been located. The deduced spectroscopic factors are compared to those measured in other promethium isotopes. It was found that the total (t, α) strength of the assigned peaks is stable within 15% for the chain of promethium isotopes ranging from mass number 147 to 153.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Seo, T., Hayashi, T.: Nucl. Phys. A159, 494 (970); Walters, W.B.: private communication
Straume, O., Løvhøiden, G., Burke, D.G.: Nucl. Phys. A266, 390 (1976)
Shahabuddin, M.A.M., Waddington, J.C., Burke, D.G., Straume, O., Løvhøiden, G.: Nucl. Phys. A307, 239 (1978)
Pakkanen, A.: private communication
Flynn, E.R., Hardekopf, R.A., Sherman, J.D., Sunier, J.W., Coffin, J.P.: Nucl. Phys. A279, 394 (1977)
Hirning, C.R., Burke, D.G., Flynn, E.R., Sunier, J.W., Schmelzbach, P.A., Haglund, R.F.: Jr. Nucl. Phys. A287, 24 (1977)
Løvhøiden, G., Burke, D.G., Hirning, C.R., Flynn, E.R., Sunier, J.W.: Nucl. Phys. A303, 1 (1978)
Burke, D.G., Løvhøiden, G., Flynn, E.R., Sunier, J.W.: Phys. Rev. C.18, 693 (1978)
Straume, O., Løvhøiden, G., Burke, D.G., Flynn, E.R., Sunier, J.W.: Nucl. Phys. A322, 13 (1979)
Orbesen, S.D., Sherman, J.D., Flynn, E.R.: Los Alamos Report, LA-6271-MS (1975)
Burke, D.G., Waddington, J.C.: Nucl. Phys. A193, 271 (1972)
Seo, T., Hayashi, T., Mithamura, T.: J. Phys. Soc. Jap.34, 1443 (1973)
Kunz, P.D.: Computer code DWUCK 4, unpublished (1974)
Straume, O., Løvhøiden, G., Burke, D.G.: Z. Physik A290, 67–80 (1979)
Maher, J.V., Kamermans, R., Smits, J.W., Siemssen, R.H.: Annual Report KVI Groningen, p. 28 (1976)
Guttormsen, M., Osnes, E., Rekstad, J., Løvhøiden, G., Straume, O.: Nucl. Phys. A298, 122 (1978)
Author information
Authors and Affiliations
Additional information
Financial support provided by the National Research Council of Canada
Work performed under the auspices of the U.S. Department of Energy
The authors are indebted to R. Hardekopf and L. Morrison for operating the polarized triton source and to S. Orbesen for assistance with the Q3D spectrometer and helix detector. The cooperation of R. Woods and the operations personnel at Los Alamos was very important for the success of this experiment and is greatly appreciated. Thanks are also due to Y. Peng for preparing the target used in this experiment. Financial support in the form of a research grant from the Nato Scientific Affairs Division is gratefully acknowledged.
Rights and permissions
About this article
Cite this article
Straume, O., Løvhøiden, G., Burke, D.G. et al. Single-proton states in149Pm. Z Physik A 293, 75–83 (1979). https://doi.org/10.1007/BF01414786
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01414786