Production cross section measurements of radioactive isotopes by BigRIPS separator at RIKEN RI Beam Factory

Suzuki, Hiroshi; Kubo, T.; Fukuda, N.; Inabe, N.; Kameda, D.; Takeda, Hiroyuki; Yoshida, Kôichi; Kusaka, K.; Yanagisawa, Y.; Ohtake, M.; Sato, Hiromi; Shimizu, Y.; Baba, H.; Kurokawa, M.; Ohnishi, T.; Tanaka, K.; Tarasov, O.; Bazin, D.; Morrissey, D. J.; Sherrill, B. M.; Ieki, K.; Murai, D.; Iwasa, N.; Chiba, A.; Ohkoda, Yohei; Ideguchi, E.; Go, S.; Yokoyama, R.; Fujii, Toshihiko; Nishimura, D.; Nıshıbata, H.; Momota, S.; Lewitowicz, M.; Defrance, Guillaume; Čeliković, I.; Steiger, Katja

doi:10.1016/j.nimb.2013.08.049

Cited by 50 publications

(24 citation statements)

References 30 publications

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“…100 Sn and nuclei with similar N and Z were produced by a fragmentation reaction of a 345 MeV/u 124 Xe primary beam on a 740 mg/cm 2 9 Be target at the Rikagaku Kenkyusho (RIKEN, The Institute of Physical and Chemical Research) of Japan RI Beam Factory [35]. Isotopes of similar mass over charge ratios A/q and atomic number Z were separated at the first stage of BigRIPS by a Bρ − E − Bρ method with a 3-mm Al wedge degrader, dipole magnets, and slits at the dispersive foci.…”

Section: Experiments and Analysismentioning

confidence: 99%

Properties of γ -decaying isomers and isomeric ratios in the Sn100 region

Park¹,

Krücken²,

Lubos³

et al. 2017

Phys. Rev. C

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Half-lives and energies of γ rays emitted in the decay of isomeric states of nuclei in the vicinity of the doubly magic 100 Sn were measured in a decay spectroscopy experiment at Rikagaku Kenkyusho (The Institute of Physical and Chemical Research) of Japan Nishina Center. The measured half-lives, some with improved precision, are consistent with literature values. Three new results include a 55-keV E2 γ ray from a new (4 + ) isomer with T 1/2 = 0.23(6) μs in 92 Rh, a 44-keV E2 γ ray from the (15 + ) isomer in 96 Ag, and T 1/2 (6 + ) = 13(2) ns in 98 Cd. Shell-model calculations of electromagnetic transition strengths in the (p 1/2 ,g 9/2 ) model space agree with the experimental results. In addition, experimental isomeric ratios were compared to the theoretical predictions derived with an abrasion-ablation model and the sharp cutoff model. The results agreed within a factor of 2 for most isomers. From the nonobservation of time-delayed γ rays in 100 Sn, new constraints on the T 1/2 , γ -ray energy, and internal conversion coefficients are proposed for the hypothetical isomer in 100 Sn.

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Section: Experiments and Analysismentioning

confidence: 99%

Properties of γ -decaying isomers and isomeric ratios in the Sn100 region

Park¹,

Krücken²,

Lubos³

et al. 2017

Phys. Rev. C

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“…The quest for new isotopes at the limits of nuclear binding is one of the major research lines in nuclear physics and in particular in RIKEN, where numerous experiments have been performed recently to test mass models and theoretical predictions of the drip lines. Different production mechanisms have been employed to these ends, for example, inflight fission of a 345A MeV 238 U and reactions with a 48 Ca beam [10][11][12] to synthesise neutron-rich isotopes, and projectile fragmentation of a 345A MeV 124 Xe beam [13] to produce nuclei at the proton drip line.…”

mentioning

confidence: 99%

New Isotopes and Proton Emitters–Crossing the Drip Line in the Vicinity ofSn100

Čeliković¹,

Lewitowicz²,

Gernhäuser³

et al. 2016

Phys. Rev. Lett.

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Several new isotopes, 96 In, 94 Cd, 92 Ag, and 90 Pd, have been identified at the RIKEN Nishina Center.The study of proton drip-line nuclei in the vicinity of 100 Sn led to the discovery of new proton emitters 93 Ag and 89 Rh with half-lives in the submicrosecond range. The systematics of the half-lives of odd-Z nuclei with T z ¼ −1=2 toward 99 Sn shows a stabilizing effect of the Z ¼ 50 shell closure. Production cross sections for nuclei in the vicinity of 100 Sn measured at different energies and target thicknesses were compared to the cross sections calculated by EPAX taking into account contributions of secondary reactions in the primary target.

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“…The secondary cocktail beam of in-flight fission fragments was separated using the BigRIPS Separator and the ZeroDegree spectrometer [7,8] at RIBF. Specific radionuclide species could be tagged on an event-by-event basis using measured parameters of magnetic rigidity (Bρ), Time-of-Flight (ToF) and energy loss (∆E) for the ions as they passed through the separator [9,10]. The primary fission residues were subsequently stopped in the Wide-range Active Silicon Strip Stopper Array (WAS3ABI) [11] which allowed direct detection of the implanted heavy ion and also subsequent position correlated β-decay events from the same ion.…”

Section: Experimental Details and Resultsmentioning

confidence: 99%

Isomer Spectroscopy of Neutron-rich $^{165,167}$Tb

et al. 2017

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(601) 602 L.A. Gurgi et al.We present information on the excited states in the prolate-deformed, neutron-rich nuclei 165,167 Tb 100,102 . The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon 238 U primary beam on a 2 mm 9 Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the µs regime measured using the EURICA gamma-ray spectrometer.

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Production cross section measurements of radioactive isotopes by BigRIPS separator at RIKEN RI Beam Factory

Abstract: We have measured the production rates and production cross sections for a variety of radioactive isotopes which were produced from 124 Xe, 48

Cited by 50 publications

References 30 publications

Properties of γ -decaying isomers and isomeric ratios in the Sn100 region

Properties of γ -decaying isomers and isomeric ratios in the Sn100 region

New Isotopes and Proton Emitters–Crossing the Drip Line in the Vicinity ofSn100

Isomer Spectroscopy of Neutron-rich $^{165,167}$Tb

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