Radiochemical Study on Photonuclear Reactions of Complex Nuclei at Intermediate Energies

Sakamoto, K.

doi:10.14494/jnrs2000.4.a9

Cited by 3 publications

(9 citation statements)

References 63 publications

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“…Figs. 39 and 40 show examples of proton spectra from 300 MeV γ+ 64 Cu and isotopic yields of products produced by bremsstrahlung reactions on 197 Au and 209 Bi at E 0 = 1 GeV calculated by CEM03.01 compared with experimental data [187,188]. Figs.…”

Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 98%

“…This is true only if we are not interested in the production of intermediatemass fragments from not too heavy targets at not too high energies, targets that do not fission from an "orthodox" point of view, therefore not producing such fragments. Bi at E 0 = 1 GeV with experimental data (red symbols) from the review [188] and calculations by PICA3/GEM (blue symbols); the PICA3/GEM results are from several publications and are presented in Fig. 18 of [188] with the corresponding citations.…”

Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 99%

“…Bi at E 0 = 1 GeV with experimental data (red symbols) from the review [188] and calculations by PICA3/GEM (blue symbols); the PICA3/GEM results are from several publications and are presented in Fig. 18 of [188] with the corresponding citations. The mass yields for the fission products shown by black curves represent approximations based on experimental data by Prof. Sakamoto's group.…”

Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 99%

“…This figure was done for us by Dr. Hiroshi Matsumura by adding our CEM03.01 results to Fig. 18 of the review [188]. [192] (filled squares) compared with our CEM03.03 results (red lines), with results by TALYS [193] (blue line) from [192], and with previous measurements shown with different symbols, as indicated (see references to old data in [192]).…”

Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 99%

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CTOF measurements and Monte Carlo analyses of neutron spectra for the backward direction from a lead target irradiated with 200–1000 MeV protons

Azhgirey¹,

Belyakov-Bodin²,

Degtyarev³

et al. 2010

Nuclear Instruments and Methods in Physics Research Section B:

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A description of the IntraNuclear Cascade (INC), preequilibrium, evaporation, fission, coalescence, and Fermi breakup models used by the latest versions of our CEM03.03 and LAQGSM03.03 event generators is presented, with a focus on our most recent developments of these models. The recently developed "S" and "G" versions of our codes, that consider multifragmentation of nuclei formed after the preequilibrium stage of reactions when their excitation energy is above 2A MeV using the Statistical Multifragmentation Model (SMM) code by Botvina et al. ("S" stands for SMM) and the fission-like binary-decay model GEMINI by Charity ("G" stands for GEMINI), respectively, are briefly described as well. Examples of benchmarking our models against a large variety of experimental data on particle-particle, particle-nucleus, and nucleus-nucleus reactions are presented. Open questions on reaction mechanisms and future necessary work are outlined.

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Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 98%

Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 99%

Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 99%

Section: Reactions Involving Pions and Photons; Excitation Functionsmentioning

confidence: 99%

See 2 more Smart Citations

CTOF measurements and Monte Carlo analyses of neutron spectra for the backward direction from a lead target irradiated with 200–1000 MeV protons

Azhgirey¹,

Belyakov-Bodin²,

Degtyarev³

et al. 2010

Nuclear Instruments and Methods in Physics Research Section B:

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“…Finally, after making the improvements to the INC and preequilibrium parts CEM (and LAQGSM) as described above, the mean values of the mass and charge numbers, A and Z of the excited compound nuclei produced after the preequilibrium stage of nuclear reactions and their mean excitation energy E * have changed slightly, which affects the probability of heavy compound nuclei (especially preactinides) to fission. This means that the procedure of fitting the ratio of the level-density parameters of fissioning nuclei at the saddle point, a f , and for evaporation from compound nuclei, a n , CEM03.01 results (green symbols) for the isotopic yields of products from E 0 = 1 GeV bremsstrahlung-induced reactions on 197 Au compared with experimental data (red symbols) [29] and calculations by PICA3/GEM (blue symbols); the PICA3/GEM results are from several publications and are presented in figure 18 of [29]. The black curves represent approximations based on experimental data [29] (see more details in [2] i.e., a f /a n which we performed in [30] to provide the best description by CEM2k and LAQGSM of fission cross sections is no longer correct.…”

Section: Recent Developments In Cem0301 and Laqgsm0301 And Illustramentioning

confidence: 99%

CEM03 and LAQGSM03—new modeling tools for nuclear applications

Mashnik

Sierk

Gudima

et al. 2006

J. Phys.: Conf. Ser.

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Abstract. An improved version of the Cascade-Exciton Model (CEM) of nuclear reactions realized in the code CEM2k and the Los Alamos version of the Quark-Gluon String Model (LAQGSM) have been developed recently at LANL to describe reactions induced by particles and nuclei for a number of applications. Our CEM2k and LAQGSM merged with the GEM2 evaporation/fission code by Furihata have predictive powers comparable to other modern codes and describe many reactions better than other codes; therefore both our codes can be used as reliable event generators in transport codes for applications. During the last year, we have made a significant improvements to the intranuclear cascade parts of CEM2k and LAQGSM, and have extended LAQGSM to describe photonuclear reactions at energies to 10 GeV and higher. We have produced in this way improved versions of our codes, CEM03.01 and LAQGSM03.01. For special studies, we have also merged our two codes with the GEMINI code by Charity and with the SMM code of Botvina. We present a brief description of our codes and show illustrative results obtained with CEM03.01 and LAQGSM03.01 for different reactions compared with predictions by other models, as well as examples of using our codes as modeling tools for nuclear applications. IntroductionFollowing an increased interest in nuclear data for such projects as the Accelerator Transmutation of nuclear Wastes (ATW), Accelerator Production of Tritium (APT), Spallation Neutron Source (SNS), Rare Isotope Accelerator (RIA), Proton Radiography (PRAD) as a radiographic probe for the Advanced Hydro-test Facility and others, for several years the US Department of Energy has supported our work on the development of improved versions of the Cascade-Exciton Model (CEM) of nuclear reactions [1, 2, 3] and the Los Alamos version of the Quark-Gluon String Model (LAQGSM) [4] to describe reactions induced by particles and nuclei at energies up to about 1 TeV/nucleon. To describe fission and production of light fragments heavier than 4 He, we have merged both our codes with several evaporation/fission/fragmentation models, including the Generalized Evaporation/fission Model code GEM2 by Furihata [5]. Our codes perform as well as and often better than other current models in describing a large variety of spallation, fission, and fragmentation reactions, therefore they are used as event-generators in several transport codes. The status of our codes as of the middle of 2004 together with illustrative results and comparisons with other models can be found in [6,7,8] and references therein. Here, we present several improvements developed during the last year leading to the new versions of our codes, CEM03.01 and LAQGSM03.01 [3,9].

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CEM03.03 and LAQGSM03.03 Event Generators for the MCNP6, MCNPX, and MARS15 Transport Codes

Mashnik,

Gudima,

Prael

et al. 2008

Preprint

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Radiochemical Study on Photonuclear Reactions of Complex Nuclei at Intermediate Energies

Cited by 3 publications

References 63 publications

CTOF measurements and Monte Carlo analyses of neutron spectra for the backward direction from a lead target irradiated with 200–1000 MeV protons

CTOF measurements and Monte Carlo analyses of neutron spectra for the backward direction from a lead target irradiated with 200–1000 MeV protons

CEM03 and LAQGSM03—new modeling tools for nuclear applications

CEM03.03 and LAQGSM03.03 Event Generators for the MCNP6, MCNPX, and MARS15 Transport Codes

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