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論文

Quasiparticle phonon model description of low-energy states in $$^{152}$$Pr

Alexa, P.*; Ramdhane, M.*; Thiamova, G.*; Simpson, G. S.*; Faust, H. R.*; Genevey, J.*; K$"o$ster, U.*; Materna, T.*; Orlandi, R.; Pinston, J. A.*; et al.

Physical Review C, 97(3), p.034327_1 - 034327_6, 2018/03

 被引用回数:2 パーセンタイル:29.6(Physics, Nuclear)

Delayed $$gamma$$-ray and conversion-electron spectroscopy was performed on A = 152 fission fragments, at the Lohengrin spectrometer of the Institut Laue-Langevin, Grenoble, France. In this study, a new decay scheme was observed for the odd-odd nuclide $$^{158}$$Pr. The low-energy structure of this isotope was analysed by comparison with the quasiparticle phonon model and the particle-rotor model. The main configurations for the ($$3^+$$) ground state and for the 4.7(3)-$$mu$$s ($$1^+$$) isomer at 115 keV were assigned to, respectively, $$pi$$3/2[541]$$otimes$$$$nu$$3/2[521] and $$pi$$3/2[422]$$otimes$$$$nu$$5/2[642].

論文

EXILL; A High-efficiency, high-resolution setup for $$gamma$$-spectroscopy at an intense cold neutron beam facility

Jentschel, M.*; Blanc, A.*; de France, G.*; K$"o$ster, U.*; Leoni, S.*; Mutti, P.*; Simpson, G.*; Soldner, T.*; Ur, C.*; Urban, W.*; et al.

Journal of Instrumentation (Internet), 12(11), p.P11003_1 - P11003_33, 2017/11

 被引用回数:27 パーセンタイル:86.8(Instruments & Instrumentation)

A highly efficient array of high-purity germanium (HPGe) detectors was developed and operated at the cold neutron beam facility PF1B of the Institut Laue-Langevin (ILL) to carry out nuclear structure studies, via measurements of $$gamma$$-rays following neutron-induced capture and fission reactions. The setup consisted of a collimation system producing a pencil beam with a thermal capture equivalent flux of about 10$$^8$$ns$$^{-1}$$cm$$^{-2}$$ at the target position and negligible neutron halo. The target was surrounded by an array of eight to ten anti-Compton shielded EXOGAM Clover detectors, four to six anti-Compton shielded large coaxial GASP detectors and two standard Clover detectors. For a part of the campaign the array was combined with 16 LaBr$$_{3}$$:(Ce) detectors from the FATIMA collaboration.

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