1. Aspects of charge distribution measurement for 252Cf(sf).
- Author
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Taofeng Wang, Guangwu Li, Liping Zhu, Or Hen, Gaolong Zhang, Qinghua Meng, Liming Wang, Hongyin Han, and Haihong Xia
- Subjects
- *
CALIFORNIUM , *DETECTORS , *KINETIC energy - Abstract
Measurements of charge distributions of fragments in the spontaneous fission of 252Cf have been performed using a unique detector setup consisting of a typical grid-ionization chamber coupled with a ΔE-E charged particle telescope. We find that the fragment mass dependency of the kinetic-energy-averaged width of the charge distribution shows a systematically decreasing trend with obvious fluctuations. The variation of the widths of the charge distribution with kinetic energy shows a pan-like shape. This is due to the large number of neutrons emitted at the high excitation energies and cold fragmentation at the low excitation energies. Deviation of the kinetic-energy-averaged most probable charge Zp from the unchanged charge distribution (UCD), ΔZ, as a function of the mass number of primary fragments, A*, changes from negative for mass asymmetric fission to positive near the symmetric fissions. Concerning the kinetic energy dependence of Zp given primary mass number A*, obvious increasing tendencies of Zp with increasing kinetic energy are observed. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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