High spin states and neutron multiplicities after pion capture in181Ta and209Bi

Authors :: Beetz, R.
de Boer, F. W. N.
Panman, J. K.
Konijn, J.
Pavlopoulos, P.
Tibell, G.
Zioutas, K.
Bergström, I.
Fransson, K.
Tauscher, L.
Blüm, P.
Guigas, R.
Koch, H.
Poth, H.
Simons, L. M.
Source :: Zeitschrift für Physik A Hadrons and Nuclei; June 1978, Vol. 286 Issue: 2 p215-232, 18p
Publication Year :: 1978
Abstract: The absorption of stoppedp<superscript>-</superscript> in<superscript>181</superscript>Ta and<superscript>209</superscript>Bi has been investigated by studying prompt and delayed?-ray spectra. Absolute cross-sections for the yield of isotopes per capturedp<superscript>-</superscript> in (p<superscript>-</superscript>, xn) reactions, as well as the relative probability of populating nuclear states of different spins have been measured for the hafnium and lead isotopes, respectively. A spin as high as 20 has been observed in the production of<superscript>204</superscript>Pb. The ground-state rotational bands of the hafnium isotopes are excited to spin values up to 16. Neutron multiplicities as large as 15 have been observed for both targets. A neutron multiplicity of ?8 is most probable for both tantalum and bismuth targets.