Abstract
The spin distribution of Evaporation Residues (ER) was measured for the reaction 30 Si + 170 Er. ER spin distributions were compared for the systems 16 O + 184 W, 19 F + 181 Ta and 30 Si + 170 Er forming the Compound Nucleus 200 Pb. Mean gamma multiplicity vs. excitation energy curve shows saturation at a lower value in case of 30 Si + 170 Er. This was attributed to non compound nuclear processes.
Highlights
IntroductionThe experiment was performed at IUAC with the recoil mass spectrometer HYRA [6]
Experimental detailsThe experiment was performed at IUAC with the recoil mass spectrometer HYRA [6]
A thin target of 170Er (97% enriched) with thickness 130 μg/cm2, on a Carbon backing of 45μg/cm2 and Carbon capping of 23 μg/cm2 was used [7] in the experiment. 4π spin spectrometer [8,9] was coupled with HYRA [10]
Summary
The experiment was performed at IUAC with the recoil mass spectrometer HYRA [6]. 4π spin spectrometer [8,9] was coupled with HYRA [10] Madhavan et al.) in such a way that the target was at the geometrical centre of the spin spectrometer. Two detectors were removed for beam pipe, one was removed for target ladder and the fourth one did not work satisfactorily. Total solid angle covered was 88% of 4π Sr with absolute efficiency 74%.
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