Impact factors and ranks of selected journals in categories according to 

SCI journal citation reports (2010):

Name of Journal Impact factor 5-year Impact factor Category and Rank
Applied Radiation and Isotopes 0.999 1.144 Nuclear Science & Technology: 15/34
Aquatic Toxicology 3.333 3.822 Marine & Freshwater Biology: 5/92
Atmospheric Environment 3.226 3.435 Environmental Sciences: 24/192
Applied Spectroscopy 1.729 1.953 Instruments and Instrumentation: 15/61
Biointerphases 3.118 3.111 Materials Science, Biomaterials: 6/25; Biophysics:29/73
Carcinogenesis 5.402 5.319 Oncology: 27/184
Chemosphere 3.155 3.559 Environmental Sciences: 28/192
Computer Physics Communications 2.300 2.301 Computer Science, Interdisciplinary applications: 16/97
Environmental Modelling & Software 2.871 2.900 Computer Science, Interdisciplinary applications: 11/97
Environmental Science & Technology 4.825 5.397 Environmental Sciences: 9/192
Environmental Toxicology and Chemistry 3.026 2.840 Environmental Sciences: 34/192
Health Physics 1.207 0.997 Nuclear Science & Technology: 7/34
IEEE Transactions on Nuclear Science 1.519 1.499 Nuclear Science & Technology: 4/34
International Journal of Radiation Oncology Biology and Physics 4.503 4.812 Radiology: 10/111
International Journal of Radiation Biology 1.861 2.148 Nuclear Science & Technology: 2/34
Journal of Environmental Radioactivity 1.466 1.484 Environmental Sciences: 104/192
Journal of Hazardous Materials 3.723 3.997 Engineering, Civil: 2/115
Journal of Radiation Research 2.007 1.817 Radiology: 52/111
Journal of Radiological Protection 1.323 1.351 Nuclear Science & Technology: 5/34
Marine Biology 2.011 2.336 Marine & Freshwater Biology: 22/92
Marine Ecology Progress Series 2.483 2.993 Marine & Freshwater Biology: 12/92
Marine Pollution Bulletin 2.359 2.899 Marine & Freshwater Biology: 15/92
Materials Chemistry and Physics 2.353 2.462 Materials Science, Multidisciplinary: 43/222
Materials Science and Engineering R 19.750 22.700 Materials Science, Multidisciplinary: 3/222
Medical Physics 3.070 3.264 Radiology: 27/111
Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis 3.204 3.903 Toxicology: 20/83
Nuclear Instruments & Methods in Physics Research, A 1.142 1.109 Nuclear Science & Technology: 9/34
Nuclear Instruments & Methods in Physics Research, B 1.042 0.984 Nuclear Science & Technology: 13/34
Physica Medica 1.316 1.014 Biophysics: 76/111
Physics in Medicine and Biology 3.056 3.126 Engineering, Biomedical: 11/69
Polymer Degradation and Stability 2.594 3.019 Polymer Science: 15/79
Radiation and Environmental Biophysics 2.040 1.950 Environmental Sciences: 66/192
Radiation Measurements 1.019 1.311 Nuclear Science & Technology: 14/34
Radiation Protection Dosimetry 0.966 0.913 Nuclear Science & Technology: 16/34
Radiation Research 2.578 2.795 Radiology: 39/111
Radiotherapy and Oncology 4.337 4.329 Radiology: 11/111
Surface & Coatings Technology 2.135 2.294 Materials Science, Coatings & Films: 2/18
X-ray Spectrometry 1.661 1.349 Spectroscopy: 22/40