Journal of nuclear and radiochemical sciences最新文献_第7页

Thermodynamics Study for the Sorption of 134 Cs and 60 Co Radionuclides from Aqueous Solutions 水溶液中134cs和60co放射性核素吸附的热力学研究

Journal of nuclear and radiochemical sciences Pub Date : 2008-06-01 DOI: 10.14494/jnrs.9.1

E. Metwally, T. El-Zakla, R. Ayoub

引用次数: 14

Performance of the Gas-jet Transport System Coupled to the RIKEN Gas-filled Recoil Ion Separator GARIS for the ^ U(^ Ne, 5n)^ No Reaction ^ U(^ Ne, 5n)^ No反应中与RIKEN充气反冲离子分离器GARIS耦合的气体射流输运系统的性能

Journal of nuclear and radiochemical sciences Pub Date : 2008-06-01 DOI: 10.14494/jnrs.9.27

H. Haba, H. Kikunaga, D. Kaji, T. Akiyama, K. Morimoto, K. Morita, T. Nanri, K. Ooe, N. Sato, A. Shinohara, D. Suzuki, T. Takabe, I. Yamazaki, A. Yokoyama, A. Yoneda

引用次数: 5

Influence of Boric Acid in the Extraction of Uranium (VI), Plutonium (IV) and Europium (III) from Fast Reactor Fuel Dissolver Solution 硼酸对从快堆燃料溶解液中提取铀(ⅵ)、钚(ⅳ)和铕(ⅲ)的影响

Journal of nuclear and radiochemical sciences Pub Date : 2008-01-01 DOI: 10.14494/JNRS.9.37

K. Venkatesan, V. Sukumaran, M. Antony, T. Srinivasan

{"title":"Influence of Boric Acid in the Extraction of Uranium (VI), Plutonium (IV) and Europium (III) from Fast Reactor Fuel Dissolver Solution","authors":"K. Venkatesan, V. Sukumaran, M. Antony, T. Srinivasan","doi":"10.14494/JNRS.9.37","DOIUrl":"https://doi.org/10.14494/JNRS.9.37","url":null,"abstract":"Addition of boric acid to dissolver solution has been proposed for minimizing the criticality concern associated with reprocessing of fast reactor fuel. Extraction of uranium (VI) and plutonium (IV) from the resultant nitric acid – boric acid medium by a solution of tri-n-butyl phosphate (TBP) in n-dodecane (n-DD) has been studied at 298 K. The distribution ratios of uranium (VI) and plutonium (IV) were found to be comparable with those obtained in the absence of boric acid. Extraction of europium (III) from nitric acid – boric acid by a solution of 1.2 M TBP–0.2 M n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) in n-DD was also studied. The solubility limit of boric acid as a function of nitric acid concentration was determined and it was found to decrease from 61.5 g/L in 0.1 M HNO3 to 32.4 g/L in 4 M HNO3 at 303 K. Extraction of boric acid in 1.1 M TBP/n-DD and in a solution of 1.2 M TBP–0.2 M CMPO in n-DD was studied and it was found to increase with increase in the concentration of boric acid above ~0.2 M. The study indicated that the interference of boric acid during the extraction of uranium (VI) plutonium (IV) by PUREX solvent and Eu(III) by TRUEX solvent was negligible and the added boric acid could be quantitatively retained in aqueous phase provided the boric acid concentration was fixed below 6 g/L (~0.1 M) in the feed solution.","PeriodicalId":16569,"journal":{"name":"Journal of nuclear and radiochemical sciences","volume":"1 1","pages":"37-39"},"PeriodicalIF":0.0,"publicationDate":"2008-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78310321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Synthesis of Endohedral 133Xe-Fullerenol by Using Higher Fullerene 用高级富勒烯合成内嵌133xe -富勒烯醇

Journal of nuclear and radiochemical sciences Pub Date : 2007-12-01 DOI: 10.14494/JNRS2000.8.105

Sou Watanabe, T. Katabuchi, N. Ishioka, S. Matsuhashi

引用次数: 0

Effects of Fulvic Concentration and Molecular Size on Complexation of Am and Pu with Aquatic Fulvic Acids 黄腐酸浓度和分子大小对Am和Pu与水生黄腐酸络合作用的影响

Journal of nuclear and radiochemical sciences Pub Date : 2007-12-01 DOI: 10.14494/JNRS2000.8.127

S. Nagao, Y. Sakamoto, T. Tanaka, Y. Nakaguchi, R. Rao

引用次数: 2

Concentrations of 226Ra and 228Ra in Hot Spring Waters from Tokyo Metropolis and Its Vicinity, Japan 日本东京都及其邻近地区温泉水中226Ra和228Ra的浓度

Journal of nuclear and radiochemical sciences Pub Date : 2007-10-19 DOI: 10.14494/JNRS2000.8.143

T. Nakano-Ohta, T. Kubota, J. Sato, Y. Mahara

{"title":"Concentrations of 226Ra and 228Ra in Hot Spring Waters from Tokyo Metropolis and Its Vicinity, Japan","authors":"T. Nakano-Ohta, T. Kubota, J. Sato, Y. Mahara","doi":"10.14494/JNRS2000.8.143","DOIUrl":"https://doi.org/10.14494/JNRS2000.8.143","url":null,"abstract":"The average concentrations of 226Ra and 228Ra in the water in hot springs in and around metropolitan Tokyo were 39 mBq L-1 and 55 mBq L-1 for NaCI-type water and 0.6 mBq L-1 and 0.8 mBq L-1 for simple alkaline-type water, respectively. From the chemical characteristics, the hot spring waters from the Kazusa and Miocene formations are classified as NaCl and that from the Shimanto and Chichibu formations is simple alkaline. This indicates that the concentrations of Ra isotopes are high for the NaCl type and low for the simple alkaline type and are correlated with the relevant sedimentation layer from which the hot spring water is welled up. Good correlation was observed for the ratios in the concentrations of Ra/Na and Ra/Cl in both types of hot spring water. The correlation patterns of Ra/Na and Ra/Cl for the simple alkaline type and sedimentary rock were different from those for the NaCl type and seawater, suggesting that the origin of the Ra isotopes may be different. The 228Ra/226Ra ctivity ratio was found to be related with Si concentration , showing that the activity ratio decreased with an increase of H2SiO3 for both the NaCl and the simple alkaline type. Assuming that the Ra isotopes in hot spring water were supplied from the relevant rock in the aquifer together with Si, the activity ratio of 228Ra/226Ra in hot spring water might be different between the NaCl and simple alkaline type, suggesting that the (228Ra/226Ra)t=0 activity ratio for residence time at t = 0 might be different for the two types.","PeriodicalId":16569,"journal":{"name":"Journal of nuclear and radiochemical sciences","volume":"103 1","pages":"143-148"},"PeriodicalIF":0.0,"publicationDate":"2007-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80800937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

High Resolution Measurements of Temporal Variations of Airborne 210Po, 210Pb, and 7Be at Ishikawa Prefecture, Facing the Sea of Japan 面向日本海的石川县空中210Po、210Pb和7Be的高分辨率时间变化测量

Journal of nuclear and radiochemical sciences Pub Date : 2007-10-19 DOI: 10.14494/JNRS2000.8.149

Y. Yamaguchi, T. Abe, Y. Murata, N. Manikandan, Kiwamu Tanaka, K. Komura

引用次数: 1

Superheavy Element Chemistry — Achievements and Perspectives 超重元素化学——成就与展望

Journal of nuclear and radiochemical sciences Pub Date : 2007-10-19 DOI: 10.14494/JNRS2000.8.47

M. Schädel

引用次数: 5

Measurement of Evaporation Residue and Fission Cross Sections of the Reaction 30Si + 238U at Subbarrier Energies 亚势垒能下30Si + 238U反应蒸发残余物和裂变截面的测量

Journal of nuclear and radiochemical sciences Pub Date : 2007-10-19 DOI: 10.14494/JNRS2000.8.73

K. Nishio, S. Hofmann, H. Ikezoe, F. Hessberger, D. Ackermann, S. Antalic, V. Comas, Z. Gan, S. Heinz, J. Heredia, J. Khuyagbaatar, B. Kindler, I. Kojouharov, P. Kuusiniemi, B. Lommel, M. Mazzocco, S. Mitsuoka, Y. Nagame, T. Ohtsuki, A. Popeko, Š. Šáró, H. Schött, B. Sulignano, A. Svirikhin, K. Tsukada, K. Tsuruta, A. Yeremin

{"title":"Measurement of Evaporation Residue and Fission Cross Sections of the Reaction 30Si + 238U at Subbarrier Energies","authors":"K. Nishio, S. Hofmann, H. Ikezoe, F. Hessberger, D. Ackermann, S. Antalic, V. Comas, Z. Gan, S. Heinz, J. Heredia, J. Khuyagbaatar, B. Kindler, I. Kojouharov, P. Kuusiniemi, B. Lommel, M. Mazzocco, S. Mitsuoka, Y. Nagame, T. Ohtsuki, A. Popeko, Š. Šáró, H. Schött, B. Sulignano, A. Svirikhin, K. Tsukada, K. Tsuruta, A. Yeremin","doi":"10.14494/JNRS2000.8.73","DOIUrl":"https://doi.org/10.14494/JNRS2000.8.73","url":null,"abstract":"Effects of the prolate deformation of 238 U on fusion were studied in the reaction 30 Si + 238 U at bombarding energies close to the Coulomb barrier. The fission (capture) cross sections were measured at the JAEA tandem accelerator to see the enhancement of the cross sections in the subbarrier energy due to the lower Coulomb barrier in the collisions of projectile at the polar sides of 238 U. In order to obtain the direct evidence for complete fusion, evaporation residue cross sections were measured at UNILAC of GSI. At the subbarrier energy of Ec.m. = 133.0 MeV, where only polar collisions to 238 U occur, we measured three spontaneously fissioning nuclei which we assigned to the isotope 264 Sg. The obtained cross section (10 +10 – 6 ) pb was smaller than the calculation that the system captured at the polar collisions results in complete fusion, suggesting the competition between fusion and quasifission. At the above barrier energy of Ec.m. = 144.0 MeV, where collisions on the equatorial side of 238 U start to contribute, we observed α-decay chains starting from 263 Sg and the cross section was determined to be (67 +67 ) pb. The data was reproduced by the calculation that the system captured from the equatorial side of 238 U results in complete fusion.","PeriodicalId":16569,"journal":{"name":"Journal of nuclear and radiochemical sciences","volume":"47 1","pages":"73-78"},"PeriodicalIF":0.0,"publicationDate":"2007-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88991103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Anion-exchange Behavior of Nb, Ta, and Pa as Homologues of Db in HF/HNO3 Solutions Nb、Ta和Pa作为Db的同系物在HF/HNO3溶液中的阴离子交换行为

Journal of nuclear and radiochemical sciences Pub Date : 2007-10-19 DOI: 10.14494/JNRS2000.8.69

Y. Kasamatsu, A. Toyoshima, H. Toume, K. Tsukada, H. Haba, Y. Nagame

引用次数: 9