Abstract
High energynp-pairs from a252Cf source were searched for. They are expected to be emitted with the absorption of negative pions which can be created through spontaneous fissions. The branching ratio is deduced as γπ/γSF 1.3×10−8 at the confidence level of 90%.
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References
Ion, D.B., Ivascu, M., Ion-Mihai, R.: Ann. Phys. (NY)171, 237 (1986)
Cerruti, C., Hisleur, J.M., Julien, J., Legrain, R., Cassagnou, Y., Ribrag, M.: Z. Phys. A — Atomic Nuclei329, 393 (1988)
Beene, J.R., Bemis, C.E., Halbert, Jr., Halbert, M.L.: Phys. Rev. C38, 569 (1988)
Julien, J., Bellini, V., Cassagnou, Y., Cerruti, C., Hisleur, J.M., Legeain, R., Lucas, B.: Z. Phys. A — Atomic Nuclei332, 473 (1989)
Heusi, P., Isaak, H.P., Pruys, H.S., Engfer, R., Hermes, E.A.: Nucl. Phys. A407, 429 (1986)
Sakai, H.: (in preparation)
Cecil, R.A., Anderson, B.D., Madey, R.: Nucl. Instrum. Methods161, 439 (1979)
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We thank Professor M. Ishihara for encouragement. We wish to acknowledge an assistance of Dr. S. Shimoura during the experiment. This work was supported in part by a Grant-in-Aids for Scientific Research No. 6342007, Ministry of Education, Science and Culture of Japan.