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F. D. Becchetti; D. G. Kovar; B. G. Harvey; D. L. Hendrie; H. Homeyer; J. Mahoney; W. von Oertzen; N. K. Glendenning

doi:10.1103/PhysRevC.9.1543

Two-proton-transfer reactions ${}^{208}{Pb}$ ( ${}^{12}C$ , ${}^{10}{Be}$ ) ${}^{210}{Po}$ and ${}^{208}{Pb}$ ( ${}^{16}O$ , ${}^{14}C$ ) ${}^{210}{Po}$

F. D. Becchetti, D. G. Kovar, B. G. Harvey, D. L. Hendrie, H. Homeyer, J. Mahoney, W. von Oertzen, and N. K. Glendenning

Phys. Rev. C 9, 1543 – Published 1 April 1974

Abstract

Levels in ${}^{210}{Po}$ have been investigated using the two-proton-transfer reactions ( ${}^{12}C$ , ${}^{10}{Be}$ ) and ( ${}^{16}O$ , ${}^{14}C$ ) on ${}^{208}{Pb}$ at incident energies $E ({}^{12}C) = 78$ MeV and $E ({}^{16}O) = 104 and 140$ MeV. Reaction products were identified and energies measured with a magnetic spectrometer and a focal-plane resistive-wire proportional counter. Many levels in ${}^{210}{Po}$ were observed up to an excitation energy of about 8 MeV. The results have been analyzed using distorted-wave Born approximation, and shell-model wave functions for levels in ${}^{210}{Po}$ have been tested. The $0^{+}$ → $0^{+}$ (g.s.) transition is enhanced by a factor ∼8 compared with the expected strength for a pure ${(π h_{\frac{9}{2}})}^{2}$ $0^{+}$ configuration for ${}^{210}{Po}$ (g.s.). The dependence of the cross sections on projectile and target structure is discussed.

[NUCLEAR REACTIONS ${}^{208}{Pb}$ ( ${}^{12}C$ , ${}^{10}{Be}$ ), $E = 78$ MeV; ${}^{208}{Pb}$ ( ${}^{16}O$ , ${}^{14}C$ ), $E = 104$ , 140 MeV; measured $σ (E_{f}, θ)$ ; DWBA analysis; ${}^{210}{Po}$ levels deduced structure; ${}^{209}{Bi}$ ( ${}^{12}C$ , ${}^{11}B$ ), $E = 78$ MeV; ${}^{209}{Bi}$ ( ${}^{16}O$ , ${}^{15}N$ ), $E = 104$ MeV; measured $σ (E_{f})$ , ${}^{210}{Po}$ levels deduced relative spectroscopic factors; Resolution 100-200 keV.]

Received 4 September 1973

DOI:https://doi.org/10.1103/PhysRevC.9.1543

Authors & Affiliations

F. D. Becchetti^*, D. G. Kovar^†, B. G. Harvey, D. L. Hendrie, H. Homeyer^‡, J. Mahoney, W. von Oertzen^§, and N. K. Glendenning

Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

^*Present address: Cyclotron Laboratory, Physics Department, University of Michigan, Ann Arbor, Michigan 48105.
^†Present address: Argonne National Laboratory, Argonne, Illinois.
^‡Permanent address: Hahn-Meitner Institute, Berlin, Germany.
^§On leave from Max Planck Institute, Hiedelberg, Germany.

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Vol. 9, Iss. 4 — April 1974

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