Determination of fragment isotopic yields in the fission of 252Cf accompanied by light charged particles

doi:10.1016/0375-9474(75)90662-4

Nuclear Physics A

Volume 246, Issue 2, 21 July 1975, Pages 505-514

https://doi.org/10.1016/0375-9474(75)90662-4 Get rights and content

Abstract

High resolution measurements of prompt γ-rays emitted from fission fragments accompanied by light charged particles (LCP) and those emitted from normal binary fission fragments in ²⁵²Cf fission were simultaneously carried out using a 30 cm³ Ge(Li) detector. A “sandwich” type of arrangement in the source-detector assembly was used to eliminate Doppler broadening of the γ-ray lines in both cases. About thirty γ-ray lines were assigned to specific fission fragments by comparison with the published results for binary fission, and the ratios of intensities of these γ-ray lines in LCP fission and binary fission were determined. Assuming that 2⁺ → 0⁺ transition intensities of doubly even isotopes are a measure of their yields, the yields of several such isotopes in LCP accompanied fission relative to that in binary fission were obtained.

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The thin film scintillation detector (TFSD) response to incident heavy ions is made use of to probe the difference in most probable mass and charge of fragments in binary and light charged particle accompanied (LCPA) fission. The response function of the detector is calculated semi-empirically and the detector calibration is done by using the peaks in the TFSD pulse height distribution due to binary fission fragments. The analysis indicates that in LCPA fission the shifts (with respect to binary fission) of the charge and mass of the most probable light fragment are larger than the corresponding shifts for the most probable heavy fragment.
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Determination of fragment isotopic yields in the fission of 252Cf accompanied by light charged particles

Abstract

Nucl. Phys.

Phys. Rev. Lett.

Phys. Rev.

Phys. Rev. Lett.

Phys. Rev.

Phys. Rev.

Phys. Rev.

Phys. Rev.

Determination of fragment isotopic yields in the fission of ²⁵²Cf accompanied by light charged particles