FIRST OBSERVATION OF THE DOUBLY MAGIC NUCLEUS 78Ni50

Bernas, M.; Ameil, F.; Armbruster, P.; Czájkowski, S.; Dessagne, Ph.; Donzaud, C.; Engelmann, Ch.; Geißel, H.; Heinz, A.; Janas, Z.; Kozhuharov, C.; Miehé, Ch.; Münzenberg, G.; Pfützner, M.; Röhl, C.; Schwab, W.; Stéphan, C.; Sümmerer, K.; Tassan‐Got, L.; Voss, B

doi:10.1142/9789814447195_0041

Cited by 7 publications

(13 citation statements)

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“…In the context of the production of exotic nuclei, it should be mentioned that 253 very neutron rich light reaction products in the range 9 Z 46 from the interaction of 238 U projectiles with beryllium and lead targets were observed in a previous experiment [21] in the course of an experimental program dedicated to produce new neutron-rich isotopes [22], in particular 78 Ni [23], by using the same installations as the present experiment. In contrast, the present experiment emphasizes the reaction aspect and focuses on a systematic overview of the most strongly produced isotopes of the light elements in the system 238 U + 1 H.…”

Section: Introductionmentioning

confidence: 83%

“…3 must be observed by keeping in mind that, owing to the limited angular acceptance of the FRS (15 mrad around 0 • ), represented by a cone in the laboratory frame, only the part of the production inside the cone is transmitted through the FRS and can actually be observed. According to what was found in previous experiments for similar systems [5][6][7]22,37,[39][40][41], we assume that the situation can schematically be described as depicted in Fig. 4.…”

Section: Discussionmentioning

confidence: 99%

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Light nuclides produced in the proton-induced spallation ofU238at 1 GeV

et al. 2006

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The production of light and intermediate-mass nuclides formed in the reaction 1 H + 238 U at 1 GeV was measured at the Fragment Separator at GSI, Darmstadt. The experiment was performed in inverse kinematics, by shooting a 1 A GeV 238 U beam on a thin liquid-hydrogen target. A total of 254 isotopes of all elements in the range 7 Z 37 were unambiguously identified, and the velocity distributions of the produced nuclides were determined with high precision. The results show that the nuclides are produced in a very asymmetric binary decay of heavy nuclei originating from the spallation of uranium. All the features of the produced nuclides merge with the characteristics of the fission products as their mass increases.

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Section: Introductionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Light nuclides produced in the proton-induced spallation ofU238at 1 GeV

et al. 2006

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“…[26]. The standard parameters of this model, such as excitation energies and production cross sections of the fissile nuclei, are those reproducing the experimental data from the 238 U + Be reaction at 750 MeV/nucleon [6]. The cross-section data of neutron-rich isotopes with Z = 20 to 46 are used to obtain the parameters [14].…”

Section: Measurements With 48 Ca Beammentioning

confidence: 99%

“…MeV/nucleon 124 Xe beam. A very wide range of neutron-rich exotic isotopes with Z ~ 20 to 70 were produced by in-flight fission [6,7] of a 345 MeV/nucleon 238 U beam. The production cross sections of these exotic nuclei have been deduced from the measured production rates with the help of simulations.…”

Section: Introductionmentioning

confidence: 99%

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

Suzuki

Kubo

Fukuda

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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“…The region of accessible exotic nuclei has been expanded significantly with these facilities. Furthermore the RI beam production via in-flight fission of a uranium beam was pioneered at FRS, demonstrating its excellent features for producing of a wide range of neutron-rich exotic nuclei [8,9].…”

Section: Introductionmentioning

confidence: 99%

Identification and separation of radioactive isotope beams by the BigRIPS separator at the RIKEN RI Beam Factory

Fukuda

Kubo

Ohnishi

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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We have developed a method for achieving excellent resolving power in in-flight particle identification of radioactive isotope (RI) beams at the BigRIPS fragment separator at the RIKEN Nishina Center RI Beam Factory (RIBF). In the BigRIPS separator, RI beams are identified by their atomic number Z and mass-to-charge ratio A/Q which are deduced from the measurements of time of flight (TOF), magnetic rigidity (B) and energy loss (E), and delivered as tagged RI beams to a variety of experiments including secondary reaction measurements. High A/Q resolution is an essential requirement for this scheme, because the charge state Q of RI beams has to be identified at RIBF energies such as 200-300 MeV/nucleon. By precisely determining the B and TOF values, we have achieved relative A/Q resolution as good as 0.034% (root-mean-square value). The achieved A/Q resolution is high enough to clearly identify the charge state Q in the Z versus A/Q particle identification plot, where fully-stripped and hydrogen-like peaks are very closely located. The precise Bdetermination is achieved by refined particle trajectory reconstruction, while a slew correction is performed to precisely determine the TOF value. Furthermore background events are thoroughly removed to improve reliability of the particle identification. In the present paper we present the details of the particle identification scheme in the BigRIPS separator. The isotope separation in the BigRIPS separator is also briefly introduced.

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FIRST OBSERVATION OF THE DOUBLY MAGIC NUCLEUS ⁷⁸Ni₅₀

Cited by 7 publications

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Light nuclides produced in the proton-induced spallation ofU238at 1 GeV

Light nuclides produced in the proton-induced spallation ofU238at 1 GeV

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

Identification and separation of radioactive isotope beams by the BigRIPS separator at the RIKEN RI Beam Factory

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