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Time-of-flight Scattering Chamber for Actinide Fission(TOSCA)
Isomer-scope
Recoil Mass Separator
A Gamma-ray Detector Array("GEMINI")
e-mail: riyou.tandem "at" jaea.go.jp


<< Time-of-flight Scattering Chamber for Actinide Fission(TOSCA) >>
BA-1
Research purpose: Mechanism of unclear fission is studied from the precise measurements of time flight and kinetic energy of fission Fragments.
Specification: Diameter of the chamber is 120cm.Equipped withthree revolving tables and one rotation arm for detectors.
Persons in charge: Katsuhisa NISHIO
Advanced Science Research Center
Research Group for Reactions Involving Heavy Nuclei
TEL:029-282-5454
FAX:029-282-5927


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<< Isomer-scope >>
BA-2
Research purpose : Nuclear structure of neutron-rich nuclei has been studied by deep-inelastic scattering with heavy-ions.
Specification : γ-ray can be detected in high sensitivity by discriminating isomers with lifetime longer than 1 ns from projectile-like fragments.
[Reference]T.Ishii et al.,Nucl. Instrum and Methods, A395(1997)210.
Persons in charge : Tetsuro ISHII
Department of Research Reactor and Tandem Accelerator
TEL:029-282-5318
FAX:029-282-6321


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<< Recoil Mass Separator >>
BB line
Research purpose : Equipment for the measurements of recoiling nuclei produced by heavy ion reaction.
Specification : The equipment consists of QQEMEQQO combination, where Q means a quadrupole magnet, E a dipole electric field, M a dipole magnetic field and O a octupole magnetic field. Deflection angle is 25_50_25 degrees.
The distance between electrode is 12cm.The pole gap of the magnets is 12cm.
Horizontal magnification is 1.66, and vertical one 1.17.
Rotation angle, -5~40 °. Totallength, 9.4m. Mass resolution, 300 and mass acceptance, ±4%. Energy acceptance, ±12%. Solid angle, 20msr.
For the reduction of background due to scattered ion beams,the positive electrode in the first electric field is separated vertically by the amount of 10mm in the up and down direction from the center to avoid the beam hitting.
[Reference]
"JAERI recoil mass separator"
Nucl. Instr. & Meth. A376(1996)420-427.H. Ikezoe, Y. Nagame, T. Ikuta, S. Hamada, I. Nishinaka and T. Ohtsuki
Persons in charge : Katsuhisa NISHIO
Advanced Science Research Center
Research Group for Reactions Involving Heavy Nuclei
TEL:029-282-5454
FAX:029-282-5927


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<< A Gamma-ray Detector Array("GEMINI") >>
BC line
Research purpose : Study of nuclear structure,analytical chemistry and materials science by γ ray spectroscopy.
Specification : Multiple γ-ray yielded from a target are measured with 12 anti-Compton γ-ray spectrometer,each of which comprises a Germanium detecton with high resolution(2.3keV FWHM at 1.33MeV)and high detector efficiency(40-70% efficiency relative to 3 inches φ × 3inches NaI),and a BGO scintillator for suppression of Compton background.
Persons in charge : Yosuke TOH
Nuclear Science and Engineering Directorate
Resarch group for Applied Nuclear Physics
TEL:029-282-6211
FAX:029-282-6789


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