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Chen, S.*; Browne, F.*; Doornenbal, P.*; Lee, J.*; Obertelli, A.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Chazono, Yoshiki*; Hagen, G.*; Holt, J. D.*; et al.
Physics Letters B, 843, p.138025_1 - 138025_7, 2023/08
Times Cited Count:1 Percentile:0.02(Astronomy & Astrophysics)Gamma decays were observed in Ca and Ca following quasi-free one-proton knockout reactions from Sc. For Ca, a ray transition was measured to be 1456(12) keV, while for Ca an indication for a transition was observed at 1115(34) keV. Both transitions were tentatively assigned as the decays. A shell-model calculation in a wide model space with a marginally modified effective nucleon-nucleon interaction depicts excellent agreement with experiment for level energies, two-neutron separation energies, and reaction cross sections, corroborating the formation of a new nuclear shell above the N = 34 shell. Its constituents, the and orbitals, are almost degenerate. This degeneracy precludes the possibility for a doubly magic Ca and potentially drives the dripline of Ca isotopes to Ca or even beyond.
Petoussi-Henss, N.*; Satoh, Daiki; Endo, Akira; Eckerman, K. F.*; Bolch, W. E.*; Hunt, J.*; Jansen, J. T. M.*; Kim, C. H.*; Lee, C.*; Saito, Kimiaki; et al.
Annals of the ICRP, 49(2), p.11 - 145, 2020/10
The age-dependent dose coefficients of organ equivalent doses and effective doses for the member of the public are required to estimate the external dose of the public exposed to radiations from radionuclides in the environment. For this purpose, a computational method to simulate the radiation fields of environmental photon and electron sources in the air, soil, and water has been developed using a particle transport code PHITS in the JAEA, and the organ equivalent doses have been calculated using the human models of newborns, 1-year-old, 5-years-old, 10-years-old, and 15-years-old children, and adults male and female provided by the ICRP. In addition, the nuclide-specific effective dose coefficients have been derived using the skin-dose data and nuclide-decay data provided by the Hanyang University and ICRP, respectively. The data of the dose coefficients are available for dose estimations of not only the Fukushima Daiichi nuclear accident but radiological emergencies which radionuclides are released to the environment.
Zhukov, A. A.*; de Groot, P. A. J.*; Kokkaliaris, S.*; Di Nicolo, E.*; Jansen, A. G. M.*; Mossang, E.*; Martinez, G.*; Wyder, P.*; Wolf, T.*; Kpfer, H.*; et al.
Physical Review Letters, 87(1), p.017006_1 - 017006_4, 2001/07
Times Cited Count:13 Percentile:60.19(Physics, Multidisciplinary)no abstracts in English
Zhukov, A. A.*; Kokkaliaris, S.*; de Groot, P. A. J.*; Jansen, A. G. M.*; Mossang, E.*; Asaoka, Hidehito; Wolf, T.*; Gagnon, R.*; Taillefer, L.*
Physica C, 341-348(Part2), p.1027 - 1030, 2000/11
no abstracts in English
Petoussi-Henss, N.*; Bellamy, M.*; Bolch, W. E.*; Eckerman, K. F.*; Endo, Akira; Hertel, N.*; Hunt, J.*; Jansen, J.*; Kim, C. H.*; Lee, C.*; et al.
no journal, ,
A Task Group of the Committee 2 of the International Commission on Radiological Protection, ICRP, is currently working on the estimation of effective dose and organ dose coefficients for members of the public due to environmental external exposures to photons and electrons. The JAEA is contributing to the Task Group by calculating the doses with the radiation transport code PHITS which has been developed in the JAEA. Those calculations were performed using the ICRP adult and pediatric male and female reference computational phantoms for the environmental radiation sources in air, soil, and water. The obtained results of effective dose and organ dose are normalized to radioactivity concentration, ambient dose equivalent, and air kerma, and summarize in a database of the dose coefficients. Furthermore, dose coefficients for radionuclides in the environment are also evaluated by using the most recent nuclear decay data.