Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Akinao Shimizu"'
Publikováno v:
Progress in Nuclear Science and Technology. 4:519-522
c A data set of gamma-ray buildup factors for point isotropic sources has been generated by the method of invariant embedding. Specific features of the data set as compared with the ANSI/ANS-6.4.3 standard published by the American Nuclear Society ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d853898f7753f3eef7ea485d5ec966ff
https://doi.org/10.15669/pnst.4.519
https://doi.org/10.15669/pnst.4.519
Publikováno v:
Journal of Nuclear Science and Technology. 48:1057-1068
A fast calculation method for gamma ray skyshine dose was developed. Four data libraries including anisotropy factors and buildup factors in the gamma ray transport calculation in air and the buildup flux energy spectrum and edge correction factor in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f821b6e24267e56adaf90095504e75d
https://doi.org/10.1080/18811248.2011.9711790
https://doi.org/10.1080/18811248.2011.9711790
Publikováno v:
Nuclear Technology. 168:585-590
Bremsstrahlung radiation (hereinafter referred to as bremsstrahlung) production data are needed in the calculation of buildup factors, including the contribution of secondary photons by the photon transport codes, which do not handle electron transpo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a47627d4a905c944eec772838649bf3
https://doi.org/10.13182/nt09-a9273
https://doi.org/10.13182/nt09-a9273
Publikováno v:
Nuclear Technology. 168:861-866
The geometric-progression (G-P) formula can accurately reproduce buildup factor data up to depths of 40 mean free paths (mfp) within a few percent. This formula was improved to apply to depths up to 100 mfp, using the buildup factor data of Shimizu e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f2b1f20d1060ec1684f7f7336627a7a
https://doi.org/10.13182/nt09-a9319
https://doi.org/10.13182/nt09-a9319
Publikováno v:
Journal of Nuclear Science and Technology. 41:413-424
An improved data set of gamma-ray buildup factors for point isotropic sources in infinite homogeneous media has been generated by the method of invariant embedding. The points of improvement compared with the standard data set ANSI/ANS-6.4.3 include
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f98fa19c30c4b232edc0682165540379
https://doi.org/10.1080/18811248.2004.9715503
https://doi.org/10.1080/18811248.2004.9715503
Application of Invariant Embedding to Reactor Physics describes the application of the method of invariant embedding to radiation shielding and to criticality calculations of atomic reactors. The authors intend to show how this method has been applie
Autor:
Akinao Shimizu, Hideo Hirayama
Publikováno v:
Journal of Nuclear Science and Technology. 40:192-200
An improved method to calculate the gamma-ray buildup factors including bremsstrahlung has been developed. The exposure buildup factors with bremsstrahlung were computed by the present method for lead, iron and water at the source energy of 10.0 MeV
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9dd43d89f94b6a3f1f3538e0ba5f030
https://doi.org/10.1080/18811248.2003.9715349
https://doi.org/10.1080/18811248.2003.9715349
Autor:
Akinao Shimizu
Publikováno v:
Journal of Nuclear Science and Technology. 39:477-486
The method of invariant embedding has been applied to calculations of gamma-ray buildup factors for point isotropic sources in infinite homogeneous media up to depths of 100 mean free paths (mfp) without bremsstrahlung. A comprehensive survey of buil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c36b7ed16b9786458db111a63db1013
https://doi.org/10.1080/18811248.2002.9715225
https://doi.org/10.1080/18811248.2002.9715225
Autor:
Akinao Shimizu
Publikováno v:
Journal of Nuclear Science and Technology. 37:454-458
The present article describes calculations about deep penetration of gamma rays by the angular eigenvalue method, that has been developed as a new semi-analytical method for radiation transport problems in slabs. The angular eigen-value method has a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a42eb73902d0c79e9be2c587c708036
https://doi.org/10.1080/00223131.2000.10874927
https://doi.org/10.1080/00223131.2000.10874927
Autor:
Hiroyuki Kadotani, Akinao Shimizu
Publikováno v:
Journal of Nuclear Science and Technology. 37:498-501
The buildup factors of gamma rays are still widely used in the practical shielding calculations. Although the early compilation of buildup factors was published back to 50’s, it is still a tedious, though straightforward, task even for state-of-the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4f80d02548b24cb12530ed2b0f444ae
https://doi.org/10.1080/00223131.2000.10874936
https://doi.org/10.1080/00223131.2000.10874936