Observation of β-Delayed Fission from <SUP>230</SUP>Ac

YUAN ShuangGui; YANG WeiFan; XU YanBing; PAN QiangYan; HE JianJun; XIONG Bing; LI YingJun

Chinese Physics C> 2000, Vol. 24> Issue(12) : 1191-1193

Observation of β-Delayed Fission from ²³⁰Ac

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
β-delayed fission for ^230Acwas searched. ²³⁰Ra was produced via multinucleon transfer reaction by 60MeV/u¹⁸O ion irradiation of ²³²Th target. Thin ²³⁰Ra→β-²³⁰Ac sources of 108 atoms were acquired through radiochemical separations. The mica track detectors were used to record the fission events. The β-delayed fission nucleus ²³⁰Ac was identified via the observed two fission events and the measured γ-ray spectra. Its β-delayed fission probability was obtained to be (1.19±0.85)×10^－8.

References

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Berlovich E Ye, Novikov Yu N. Phys. Lett., 1969,B29: 1552 Myers W, Swiatecki W. Nucl. Phys., 1966,81: 1 3 Thielemann F K, Metzinger J, Klapdor H V. Z. Phys., 1983, A309:301 4 Klapdor H V. Fortschr Phys., 1985,33: 15 Gangrskii Yu P, Marinescu G M, Miller M B et al. Sov. J. Nucl. Phys., 1978,27:4756 Baas–May A, Kratz J V. Trautmann N. Z. Phys., 1985, A322:4577 Hal H L, Gregorich K E, Henderson R A et al. Phys. Rev., 1989, C39: 1866 8 Mezilev K A, Novikov Yu N, Popov A V et al. Z. Phys., 1990,A337: 109 9 Akovali Y A. Nucl. Data Sheets, 1993, 69: 155

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YUAN ShuangGui, YANG WeiFan, XU YanBing, PAN QiangYan, HE JianJun, XIONG Bing and LI YingJun. Observation of β-Delayed Fission from ²³⁰Ac[J]. Chinese Physics C, 2000, 24(12): 1191-1193.

YUAN ShuangGui, YANG WeiFan, XU YanBing, PAN QiangYan, HE JianJun, XIONG Bing and LI YingJun. Observation of β-Delayed Fission from ²³⁰Ac[J]. Chinese Physics C, 2000, 24(12): 1191-1193. shu

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Received: 2000-07-07
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Observation of β-Delayed Fission from ²³⁰Ac

Corresponding author: YUAN ShuangGui,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 2000-07-07
Accepted Date: 1900-01-01
Available Online: 2000-12-05

Abstract: β-delayed fission for ^230Acwas searched. ²³⁰Ra was produced via multinucleon transfer reaction by 60MeV/u¹⁸O ion irradiation of ²³²Th target. Thin ²³⁰Ra→β-²³⁰Ac sources of 108 atoms were acquired through radiochemical separations. The mica track detectors were used to record the fission events. The β-delayed fission nucleus ²³⁰Ac was identified via the observed two fission events and the measured γ-ray spectra. Its β-delayed fission probability was obtained to be (1.19±0.85)×10^－8.