Abstract
Two new absolute transition rates are reported for the nucleus144Sm following an (α, α′) Coulomb excitation study. They are B(E3; 3−→ 0+)=(38±3) W.u. and B(E1;3− → 2+)=(2.8±0.4)×10−3 W.u. This large E1 matrix element, along with the previously known B(E1; 1− →+) value support the interpretation of the 1− state in this nucleus as 2-phonon 2+ × 3− excitation. In the frame of the IBM-1 +f-boson model we show the need for a two-body term in the E1 transition operator. Estimates for the strengths of the one and two-body parts of the E1 transition operator are obtained from these experimental data.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Metzger, F.R.: Phys. Rev. C14, 543 (1976)
Swan, C.P.: Phys. Rev. C15, 1967 (1977)
Metzger, F.R.: Phys. Rev. C18, 2138 (1978)
Martin, R., Bimbot, L., Gales, S., Lessard, L., Spalding, D., Weitkamp, W.G., Dietzsch, O., Foster, J.L. Jr.: Nucl. Phys. A210, 221 (1973)
Dao Tien Khoa, Ponomarev, JV.Yu., Voronev, V.V.: Preprint Dubna, E4-84-27 (1984)
Leander, G.A., Nazarewicz, W., Bertsch, G.F., Dudek, J.: Nucl. Phys. A453, 58 (1986)
Daley, H.J., Iachello, F.: Ann. Phys. (N.Y.)167, 73 (1986);
Daley, H.J., Barrett, B.R.: Nucl. Phys. A449, 256 (1986)
Engel, J., Iachello, F.: Phys. Rev. Lett.54, 1126 (1985)
Sakai, M.: At. Data Nucl. Data Tables31, 399 (1984)
Kownacki, J., Ryde, H., Sergejev, V.O., Sujkowski, Z.: Nucl. Phys. A196, 498 (1972)
Tuli, J.K.: Nucl. Data Sheets27, 97 (1979)
Alder, K., Winther, A.: Electromagnetic excitation. Amsterdam: North Holland 1975
Rösel, F. et al.: At. Data Nucl. Data Tables21, 91 (1978)
Raman, S., Malarkey, C.H., Milner, W.T., Nestor, C.W. Jr., Stelson, P.H.: At. Data Nucl. Data Tables36, 1 (1987)
Endt, P.M.: At. Data Nucl. Data Tables26, 47 (1981)
Vogel, P., Kochach, L.: Nucl. Phys. A176, 33 (1971)
Arima, A., Iachello, F.: Phys. Rev. Lett.35, 1069 (1976);
Arima, A., Iachello, F.: Ann. Phys. (N.Y.)99, 253 (1976);
ibid.111, 201 (1978)
Barfield, A.F., Wood, J.L., Barrett, B.R.: Phys. Rev. C34, 2001 (1986);
Barfield, A.F., Wood, J.L., Barrett, B.R., Scholten, O.: Ann. Phys. (N.Y.)182, 344 (1988)
Scholten, O., Iachello, F., Arima, A.: Ann. Phys. (N.Y.)115, 325 (1978)
Casten, R.F., Frank, W., v. Brentano, P.: Nucl. Phys. A444, 133 (1985)
Scholten, O.: In: Bosons in nuclei. Fang, D.H., Pittel, S., Vollieres, M. (eds.), p. 223. Singapore: World Scientific 1984
Wolf, A., Casten, R.F.: Phys. Rev. C36, 851 (1987)
Bucurescu, D., Cata, G., Cutoiu, D., Constantinescu, G., Ivaşcu, M., Zamfir, N.V.: Z. Phys. A — Atomic Nuclei324, 387 (1986)
Otsuka, T., Sugita, M.: Phys. Rev. Lett. (submitted)
Author information
Authors and Affiliations
Additional information
The authors thank R.F. Casten, A. Gelberg, F. Iachello, Dao Tien Khoa, K. Heyde, C. Wesselborg and H. Harter for valuable discussions and S. Harissopulos for his help during the experiments. NVZ thanks Institut für Kernphysik in Köln and AFB thanks both Institut für Kernphysik in Köln and the Kernfysisch Versneller Institut in Groningen for their hospitality during the course of this work. This work has been partially funded by the German Minister of Research and Technology (BMFT) under contract number 060K272.
Rights and permissions
About this article
Cite this article
Barfield, A.F., von Brentano, P., Dewald, A. et al. Evidence for the two-body nature of theE1 transition operator in the sdf-interacting boson model. Z. Physik A - Atomic Nuclei 332, 29–32 (1989). https://doi.org/10.1007/BF01292577
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01292577