Lifetime measurements of excited levels in prompt fission products of 252Cf

G. Mamane; E. Cheifetz; E. Dafni; A. Zemel; J. B. Wilhelmy

doi:10.1016/0375-9474(86)90265-4

Lifetime measurements of excited levels in prompt fission products of ²⁵²Cf

G. Mamane, E. Cheifetz, E. Dafni, A. Zemel, J. B. Wilhelmy

Research output: Contribution to journal › Article › peer-review

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Abstract

Lifetimes in the range 10^-11 to 10^-9 s of prompt γ rays emitted from the fission fragments of ²⁵²Cf were measured using a recoil distance method. A ²⁵²Cf source was deposited on a stretched Ni foil and placed in a plunger device, the recoil direction of the studied fragments being determined by the detection of the complementary fragment. The lifetime was determined by the change in the non-Doppler-shifted peak intensities of prompt γ rays as a function of the source-plunger distance. The 2⁺ → 0⁺ half-life in ¹¹²Pd and 4⁺ → 0⁺ halflives in ^{104, 106}Mo, ^108,110Ru and ¹⁴²Ba were determined for the first time. Several other measurements of longer lived 2⁺ → 0⁺ transitions were repeated as well. The experimental results are discussed within the framework of the rotational and the IBA-2 models.

Original language	English
Pages (from-to)	213-225
Number of pages	13
Journal	Nuclear Physics A
Volume	454
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(86)90265-4
State	Published - 16 Jun 1986
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0375-9474(86)90265-4

Cite this

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abstract = "Lifetimes in the range 10-11 to 10-9 s of prompt γ rays emitted from the fission fragments of 252Cf were measured using a recoil distance method. A 252Cf source was deposited on a stretched Ni foil and placed in a plunger device, the recoil direction of the studied fragments being determined by the detection of the complementary fragment. The lifetime was determined by the change in the non-Doppler-shifted peak intensities of prompt γ rays as a function of the source-plunger distance. The 2+ → 0+ half-life in 112Pd and 4+ → 0+ halflives in 104, 106Mo, 108,110Ru and 142Ba were determined for the first time. Several other measurements of longer lived 2+ → 0+ transitions were repeated as well. The experimental results are discussed within the framework of the rotational and the IBA-2 models.",

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AU - Mamane, G.

AU - Cheifetz, E.

AU - Dafni, E.

AU - Zemel, A.

AU - Wilhelmy, J. B.

PY - 1986/6/16

Y1 - 1986/6/16

N2 - Lifetimes in the range 10-11 to 10-9 s of prompt γ rays emitted from the fission fragments of 252Cf were measured using a recoil distance method. A 252Cf source was deposited on a stretched Ni foil and placed in a plunger device, the recoil direction of the studied fragments being determined by the detection of the complementary fragment. The lifetime was determined by the change in the non-Doppler-shifted peak intensities of prompt γ rays as a function of the source-plunger distance. The 2+ → 0+ half-life in 112Pd and 4+ → 0+ halflives in 104, 106Mo, 108,110Ru and 142Ba were determined for the first time. Several other measurements of longer lived 2+ → 0+ transitions were repeated as well. The experimental results are discussed within the framework of the rotational and the IBA-2 models.

AB - Lifetimes in the range 10-11 to 10-9 s of prompt γ rays emitted from the fission fragments of 252Cf were measured using a recoil distance method. A 252Cf source was deposited on a stretched Ni foil and placed in a plunger device, the recoil direction of the studied fragments being determined by the detection of the complementary fragment. The lifetime was determined by the change in the non-Doppler-shifted peak intensities of prompt γ rays as a function of the source-plunger distance. The 2+ → 0+ half-life in 112Pd and 4+ → 0+ halflives in 104, 106Mo, 108,110Ru and 142Ba were determined for the first time. Several other measurements of longer lived 2+ → 0+ transitions were repeated as well. The experimental results are discussed within the framework of the rotational and the IBA-2 models.

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Lifetime measurements of excited levels in prompt fission products of ²⁵²Cf

Abstract

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