The collinear cluster tri-partition (CCT) of 252Cf (sf): New aspects from neutron gated data

被引：66

作者：

Pyatkov, Yu. V. ^{[1
,2
]}

Kamanin, D. V. ^{[1
]}

von Oertzen, W. ^{[3
,7
]}

Alexandrov, A. A. ^{[1
]}

Alexandrova, I. A. ^{[1
]}

Falomkina, O. V. ^{[1
,4
]}

Jacobs, N. ^{[5
]}

Kondratjev, N. A. ^{[1
]}

Kuznetsova, E. A. ^{[1
]}

Lavrova, Yu. E. ^{[2
]}

Malaza, V. ^{[5
]}

Ryabov, Yu. V. ^{[6
]}

Strekalovsky, O. V. ^{[1
]}

Tyukavkin, A. N. ^{[2
]}

Zhuchko, V. E. ^{[1
]}

机构：

[1] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[2] Natl Nucl Res Univ MEPHI, Moscow 115409, Russia

[3] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany

[4] Moscow MV Lomonosov State Univ, Fac Phys, Comp Methods Phys Div, Moscow 119899, Russia

[5] Univ Stellenbosch, Fac Mil Sci, Mil Acad, ZA-7395 Saldanha, South Africa

[6] Inst Nucl Res RAN, Moscow 117312, Russia

[7] Free Univ Berlin, Fachbereich Phys, Berlin, Germany

来源：

EUROPEAN PHYSICAL JOURNAL A | 2012年 / 48卷 / 07期

关键词：

SPONTANEOUS FISSION; ASYMMETRIC FISSION; PRODUCTS; EMISSION; SPECTROMETER; TRIPARTITION; U-235(N(TH);

D O I：

10.1140/epja/i2012-12094-5

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Results of two different experiments for the study of fission of Cf-252 (sf) events in coincidence with neutrons are reported. Two time-of-flight-energy (TOF-E) detectors systems have been used. The fission fragment masses were obtained in a double arm coincidence set-up, where the missing mass in the binary decay is used to characterise ternary fission as a collinear cluster tri-partition (CCT). The He-3 filled neutron counters have been arranged so as to detect principally neutrons emitted from an isotropic source in the laboratory frame. The fission events connected to the larger experimental neutron multiplicities show a wide range in the missing-mass spectrum, down to alpha-particles, carbon and oxygen isotopes. These are linked with magic nuclei in the binary mass-mass correlations of the fission fragments. These neutron gated data are virtually free from background events from scattered binary fission fragments. The ungated spectra are compared to those of the previous data from our previous article (Eur. Phys. J. A. 45, 29 (2010)), the observed structures agree well with the manifestations of the collinear cluster tri-partition of Cf-252 (sf) observed earlier. Several new families of the CCT modes are observed.

引用

页数：16

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