Emphysematous Cholecystitis: A Case Report and Review of the Japanese Literature

Ikeda, Go; Umeda, Kazukiyo; Suzaki, Makoto; Sakai, Hideaki; Machishi, Hideki

doi:10.3919/ringe1963.55.1838

Cited by 6 publications

(12 citation statements)

References 3 publications

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“…Since its resistance force stems from the nuclear saturation properties, the peak position as well as its distributions is closely related to the bulk properties of the nuclear matter, especially, to the nuclear symmetry energy [6,7] Recently, due to the new advancement of the experimental techniques, the exploration of new E1 excitation modes has attracted interest to the nuclear physics community. In neutron-rich nuclei in which the neutron wave function is extended than that of protons, it was pointed out that in the low excitation energies the possibility of emerging the soft dipole excitation mode as oscillations of a core against excess neutrons [8][9][10][11]. Recent microscopic calculations for halo nuclei showed that that the low-lying E1 strengths have the typical soft-dipole type excitation character in 6 He [12] and 22 C [13].…”

Section: Introductionmentioning

confidence: 99%

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Emergence of nuclear clustering in electric-dipole excitations ofLi6

Satsuka

Horiuchi

2019

Phys. Rev. C

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Nuclear clustering plays an important role, especially in the dynamics of light nuclei. The importance of the emergence of the nuclear clustering was discussed in the recent measurement of the photoabsorption cross sections as it offered the possibility of the coexistence of various excitation modes which are closely related to the nuclear clustering. To understand the excitation mechanism, we study the electric-dipole (E1) responses of 6 Li with a fully microscopic six-body calculation. The ground-state wave function is accurately described with a superposition of correlated Gaussian (CG) functions with the aid of the stochastic variational method. The final-state wave functions are also expressed by a number of the CG functions including important configurations to describe the six-body continuum states excited by the E1 field. We found that the out-of-phase transitions occur due to the oscillations of the valence nucleons against the 4 He cluster at the low energies around 10 MeV indicating "soft" giant-dipole-resonance(GDR)-type excitations, which are very unique in the 6 Li system but could be found in other nuclear systems. At the high energies beyond ∼ 30 MeV typical GDR-type transitions occur. The 3 He-3 H clustering plays an important role to the GDR phenomena in the intermediate energy regions around 20 MeV.

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Section: Introductionmentioning

confidence: 99%

“…Recent microscopic calculations for halo nuclei showed that that the low-lying E1 strengths have the typical soft-dipole type excitation character in 6 He [12] and 22 C [13]. Exotic excitations such as troidal and compressive modes were also discussed in 10 Be as possible new excitations for light unstable nuclei [14].…”

Section: Introductionmentioning

confidence: 99%

Emergence of nuclear clustering in electric-dipole excitations ofLi6

Satsuka

Horiuchi

2019

Phys. Rev. C

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“…The existence of collective vibrations in neutron-rich nuclei at low energies was suggested by Kubono, Nomura, and collaborators in a 1987 proposal for the Japanese Hadron project which eventually became the J-PARC facility [1]. This proposal was later given theoretical support by Ikeda [2] and collaborators. It took nearly two decades for experimental evidences of the existence of a collective low energy response to be found in neutronrich nuclei, far from the valley of stability.…”

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confidence: 99%

Dynamical coupling of pygmy and giant resonances in relativistic Coulomb excitation

et al. 2016

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We study the Coulomb excitation of pygmy dipole resonances (PDR) in heavy ion reactions at 100 MeV/nucleon and above. The reactions 68 Ni + 197 Au and 68 Ni + 208 Pb are taken as a practical examples. Our goal is to address the question of the influence of giant resonances on the PDR as the dynamics of the collision evolves. We show that the coupling to the giant resonances affects considerably the excitation probabilities of the PDR, a result that indicates the need of an improved theoretical treatment of the reaction dynamics at these bombarding energies.

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“…The excess nucleons in the halo nuclei results in two important effects. The excitation of low lying dipole mode, the Pigmy Dipole Resonance (PDR) (also known as the Ikeda resonance) [188][189][190][191][192][193], and the close-to-threshold breakup. These two effects were found to influence the fusion in two distinct ways.…”

Section: Coupled Channelsmentioning

confidence: 99%

“…Some features of neutron rich nuclei are also though to be very sensitive to the the symmetry energy, such as their neutron skin ∆r = r p − r n , where r p(n) is the proton (neutron) matter distribution [289,290]. Collective vibrations in neutron-rich nuclei at low energies are usually so-called Pigmy Resonances or Ikeda resonances [188,191,[291][292][293]. According to equation (14) of Ref.…”

Section: A Collective Resonances Neutron Skins and Neutron Starsmentioning

confidence: 99%

Current Status of Nuclear Physics Research

Bertulani

Hussein

2015

Braz J Phys

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In this review we discuss the current status of research in nuclear physics which is being carried out in different centers in the World. For this purpose we supply a short account of the development in the area which evolved over the last 9 decades, since the discovery of the neutron. The evolution of the physics of the atomic nucleus went through many stages as more data become available. We briefly discuss models introduced to discern the physics behind the experimental discoveries, such as the shell model, the collective model, the statistical model, the interacting boson model, etc., some of these models may be seemingly in conflict with each other, but this was shown to be only apparent.The richness of the ideas and abundance of theoretical models attests to the important fact that the nucleus is a really singular system in the sense that it evolves from two-body bound states such as the deuteron, to few-body bound states, such as 4 He, 7 Li, 9 Be etc. and up the ladder to heavier bound nuclei containing up to more than 200 nucleons. Clearly statistical mechanics, usually employed in systems with very large number of particles, would seemingly not work for such finite systems as the nuclei, neither do other theories which are applicable to condensed matter. The richness of nuclear physics stems from these restrictions. New theories and models are presently being developed. Theories of the structure and reactions of neutron-rich and proton-rich nuclei, called exotic nuclei, halo nuclei, or Borromean nuclei, deal with the wealth of experimental data that became available in the last 35 years. Further, nuclear astrophysics and stellar and Big Bang nucleosynthesis have become a more mature subject. Due to limited space, this review only covers a few selected topics, mainly those with which the authors have worked on. Our aimed potential readers of this review are nuclear physicists and physicists in other areas, as well as graduate students interested in pursuing a career in nuclear physics.

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Emphysematous Cholecystitis: A Case Report and Review of the Japanese Literature

Cited by 6 publications

References 3 publications

Emergence of nuclear clustering in electric-dipole excitations ofLi6

Emergence of nuclear clustering in electric-dipole excitations ofLi6

Dynamical coupling of pygmy and giant resonances in relativistic Coulomb excitation

Current Status of Nuclear Physics Research

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