Development of a measurement system for the determination of (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0013.gif" overflow="scroll"><mml:mi>n</mml:mi><mml:mo>,</mml:mo><mml:mi mathvariant="normal">γ</mml:mi></mml:math>) cross-sections using multi-nucleon transfer reactions

Makii, H.; Ota, S.; Ishii, T.; Wakabayashi, Y.; Furutaka, Kazuyoshi; Nishio, K.; Nishinaka, I.; Chiba, Satoshi; Igashira, M.; Czeszumska, A.

doi:10.1016/j.nima.2015.05.005

Cited by 6 publications

(2 citation statements)

References 39 publications

(119 reference statements)

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“…The response functions of the scintillators were calculated by using the Monte-Carlo code, GEANT4 [13] in a similar manner described in Ref. [14]. In the present study, the unfolding was performed with a computer program, TUnfold [15], and the response matrix made of response functions mentioned above.…”

Section: Resultsmentioning

confidence: 99%

Measurement of high-energy prompt gamma-rays from neutron induced fission of U-235

Makii

Nishio²,

Hirose³

et al. 2017

EPJ Web Conf.

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Abstract.We have developed a new setup to measure prompt γ -rays from the 235 U(n th , f ) reaction. The setup consists of two multi-wire proportional counters (MWPCs) to detect the fission fragments, two LaBr 3 (Ce) scintillators to measure the γ -rays. The highly efficient setup was installed at the PF1B beam line of the Institut Laue Langevin (ILL). We have successfully measured the γ -ray spectrum up to about 20 MeV for the fist time in neutron-induced fission.

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Section: Resultsmentioning

confidence: 99%

Measurement of high-energy prompt gamma-rays from neutron induced fission of U-235

Makii

Nishio²,

Hirose³

et al. 2017

EPJ Web Conf.

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“…Very recently, a collaboration led by the JAEA fission group performed a dedicated measurement of the γ-ray spectra up to ∼20 MeV in thermal-neutroninduced fission of 235 102 mm×thickness 127 mm) [411] coupled with multiwire proportional counters for fission fragments were used. Although the data analysis is underway, enough coincidence events between FFs and γ rays were registered as to reveal the hump structure around E γ = 15 MeV associated with the GDR decay as well as local peaks at ∼4 and 6 MeV [409].…”

Section: Prompt γ-Ray Emission From Fission Fragmentsmentioning

confidence: 99%

Nuclear fission: a review of experimental advances and phenomenology

2017

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In the last two decades, through technological, experimental and theoretical advances, the situation in experimental fission studies has changed dramatically. With the use of advanced production and detection techniques both much more detailed and precise information can now be obtained for the traditional regions of fission research and, crucially, new regions of nuclei have become routinely accessible for fission studies. This work first of all reviews the recent developments in experimental fission techniques, in particular the resurgence of transfer-induced fission reactions with light and heavy ions, the emerging use of inverse-kinematic approaches, both at Coulomb and relativistic energies, and of fission studies with radioactive beams. The emphasis on the fission-fragment mass and charge distributions will be made in this work, though some of the other fission observables, such as prompt neutron and γ-ray emission will also be reviewed. A particular attention will be given to the low-energy fission in the so far scarcely explored nuclei in the very neutron-deficient lead region. They recently became the focus for several complementary experimental studies, such as β-delayed fission with radioactive beams at ISOLDE(CERN), Coulex-induced fission of relativistic secondary beams at FRS(GSI), and several prompt fusion-fission studies. The synergy of these approaches allows a unique insight in the new region of asymmetric fission around [Formula: see text]Hg, recently discovered at ISOLDE. Recent extensive theoretical efforts in this region will also be outlined. The unprecedented high-quality data for fission fragments, completely identified in Z and A, by means of reactions in inverse kinematics at FRS(GSI) and VAMOS(GANIL) will be also reviewed. These experiments explored an extended range of mercury-to-californium elements, spanning from the neutron-deficient to neutron-rich nuclides, and covering both asymmetric, symmetric and transitional fission regions. Some aspects of heavy-ion induced fusion-fission and quasifission reactions will be also discussed, which reveal their dynamical features, such as the fission time scale. The crucial role of the multi-chance fission, probed by means of multinucleon-transfer induced fission reactions, will be highlighted. The review will conclude with the discussion of the new experimental fission facilities which are presently being brought into operation, along with promising 'next-generation' fission approaches, which might become available within the next decade.

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