Fission decay ofN=Znuclei at high angular momentum:Zn60

• DOI: 10.1103/physrevc.78.044615
• Publication Date: 2008-10-17T17:36:24Z
• Authors: W. von Oertzen; V. Zherebchevsky; B. Gebauer; Ch. Schulz; S. Thummerer; D. Kamanin; G. Royer; Th. Wilpert
• Keywords: Spontaneous fission

Using a unique two-arm detector system for heavy ions (the BRS, binary reaction spectrometer), coincident fission events have been measured from the decay of $^{60}\mathrm{Zn}$ compound nuclei formed at 88 MeV excitation energy in reactions with $^{36}\mathrm{Ar}$ beams on $^{24}\mathrm{Mg}$ target ${E}_{\mathrm{lab}}({}^{36}\mathrm{Ar})=195$ MeV. The detectors consisted two large-area position-sensitive ($x,y$) gas telescopes Bragg-ionization chambers. From coincidences detectors, inclusive and exclusive cross sections channels differing losses charge were obtained. Narrow out-of-plane correlations corresponding to coplanar are observed fragments emitted events, data ternary missing charges 4 up 8. After subtraction broad components, these narrow interpreted as process high angular momentum through an elongated shape. lighter mass neck region consists dominantly or three $\ensuremath{\alpha}$ particles. Differential different splits presented. relative yields explained using statistical model based extended Hauser-Feshbach formalism nucleus decay. can be described by hyper-deformed states momenta around $4552\ensuremath{\hbar}$.