Laser Compton back-scattering gamma-ray beamline on NewSUBARU

Miyamoto, Shuji; Asano, Yoshihiro; Amano, Sho; Li, Dazhi; Imasaki, K.; Kinugasa, Hiroaki; Shoji, Y.; Takagi, Tetsuya; Mochizuki, Takayasu

doi:10.1016/j.radmeas.2007.01.013

Cited by 74 publications

(41 citation statements)

References 7 publications

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“…The gamma-ray beam was generated by Compton scattering laser photons with electrons stored in the electron storage ring NewSUBARU. The details of the CLS gamma-ray source and examples of nuclear experiments are described in previous papers [8,10,11]. The energy of the generated gamma-rays is determined by the energies of electron beam and laser.…”

Section: Methodsmentioning

confidence: 99%

“…The progress of relativistic engineering provides a new generation of photon beam, laser Compton scattering (LCS) gamma-rays. The energy tunable quasi-monochromatic LCS gamma-ray beam with MeV energy has been used for studying fundamental science and various applications at Duke University [7] and NewSUBARU [8] at present. The LCS gamma-rays have advantages that the maximum energy is sharply determined by the basic QED process and that the brightness near the maximum energy is relatively high.…”

Section: Introductionmentioning

confidence: 99%

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New probe of M1 and E1 strengths in GDR regions

Hayakawa¹,

Ogata²,

Miyamoto³

et al. 2014

AIP Conference Proceedings

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Abstract. The M1 strengths (or level density of 1 + states) are of importance for estimation of interaction strengths between neutrinos and nuclei for the study of the supernova neutrino-process. In 1957, Agodi predicted theoretically angular distribution of neutrons emitted from states excited via dipole transitions with linearly polarized gamma-ray beam at the polar angle of =90 should be followed by a simple function, a + b cos(2 ), where is azimuthal angel. However, this theoretical prediction has not been verified over the wide mass region except for light nuclei as deuteron. We have measured neutron angular distributions with (polarized gamma, n) reactions on Au, NaI, and Cu. We have verified the Agodi's prediction for the first time over the wide mass region. This suggests that (polarized gamma, n) reactions may be useful tools to study M1 strengths in giant resonance regions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New probe of M1 and E1 strengths in GDR regions

Hayakawa¹,

Ogata²,

Miyamoto³

et al. 2014

AIP Conference Proceedings

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“…1. The features of the ELI-NP gamma beam are well beyond the available beams at the currently running facilities around the world, such as HIγS [9], NewSUBARU LCS [10] or AIST-LCS [11].…”

Section: The Gamma Beam System At Eli-npmentioning

confidence: 99%

“…The NRF experiments envisaged to be carried out at ELI-NP are aiming at playing into the very qualities that differentiate the ELI-NP GBS from other facilities [9][10][11]. The high intensity and low energy bandwidth over a large energy range allow to run experiments on highly enriched targets or rare isotopes, such as studying the photoresponse of weakly abundant p-nuclei.…”

Section: Nuclear Resonance Fluorescencementioning

confidence: 99%

Nuclear physics with advanced brilliant gamma beams at ELI–NP

Filipescu

Gheorghe

et al. 2016

EPJ Web of Conferences

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Abstract. The Extreme Light Infrastructure -Nuclear Physics facility is dedicated to nuclear physics studies with the use of extreme electromagnetic radiation. One of the main research system to be installed and operated in the facility is an outstanding high brilliance gamma beam system. The Gamma Beam System of ELI-NP will produce intense, quasi-monochromatic gamma beams via inverse Compton scattering of short laser pulses on relativistic electron beam pulses. The gamma beams available at ELI-NP will allow for the performance of photo-nuclear reactions aiming to reveal the intimate structure of the atomic nucleus. Nuclear Resonance Fluorescence, photo-fission, photo-disintegration reactions above the particle threshold will be used to study the dipole response of nuclei, the structure of the Pygmy resonances, nuclear processes relevant for astrophysics, production and study of exotic neutron-rich nuclei.

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“…Recently, the development of the compact and quasimonochromatic photon (X-ray) source generator has proceeded, which is expected to be realized as portable photon generator device with higher energy than the photonuclear threshold energy [11][12][13][14]. Its application is expected to be one of the NDA techniques.…”

Section: Introductionmentioning

confidence: 99%

Precision requirement of the photofission cross section for the nondestructive assay

2017

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Abstract. Principle of the new NDA technique based on the photofission reaction rate ratio (PFRR) has been developed by Kimura et al for measurement of uranium enrichment by using the only relative measured counts of neutron produced by photofission reactions of 235 U and 238 U at different specific incident photon energies. In the past analysis, no attentions have been paid for relatively large uncertainty of photonuclear cross section of special nuclear materials around 10%. In the present paper, quantitative analysis was performed to reveal the impact of photonuclear cross section uncertainty to predicted value of the uranium enrichment by the PFRR methodology. And also, the requirement of photofission cross section precision was evaluated as less than 3%, to satisfy the uncertainty of PFRR methodology to within 5%.

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Laser Compton back-scattering gamma-ray beamline on NewSUBARU

Cited by 74 publications

References 7 publications

New probe of M1 and E1 strengths in GDR regions

New probe of M1 and E1 strengths in GDR regions

Nuclear physics with advanced brilliant gamma beams at ELI–NP

Precision requirement of the photofission cross section for the nondestructive assay

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