Class information for:
Level 2: POSITRON ANNIHILATION//POSITRONIUM//FREE VOLUME

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
13 4 PHYSICS, PARTICLES & FIELDS//PHYSICS, NUCLEAR//OPTICS 1062565
335 3       JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS//PHYSICAL REVIEW A//PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 37816
2162 2             POSITRON ANNIHILATION//POSITRONIUM//FREE VOLUME 5297
1287 1                   POSITRON ANNIHILATION//POSITRON BEAM//SLOW POSITRON BEAM 2753
2944 1                   POSITRON ANNIHILATION//POSITRONIUM//FREE VOLUME 2136
23950 1                   SIMULATED CALCULATIONS//BI BASED CUPRATE SUPERCONDUCTORS//LOCAL ELECTRON DENSITY 352
38693 1                   ATOMENERGIAI KUTATOINTEZET//COINCIDENCE DOPPLER BROADENING SPECTRA CDBS//DEFECTS POROSITY 56

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 POSITRON ANNIHILATION authKW 1756079 11% 49% 601
2 POSITRONIUM authKW 541503 4% 47% 193
3 FREE VOLUME authKW 365303 5% 23% 263
4 POSITRON BEAM authKW 349085 2% 68% 86
5 POSITRON LIFETIME authKW 334642 2% 51% 110
6 SLOW POSITRON BEAM authKW 225797 1% 62% 61
7 POSITRON authKW 218515 3% 24% 151
8 POSITRON ANNIHILATION SPECTROSCOPY authKW 161498 2% 31% 88
9 POSITRON ANNIHILATION LIFETIME SPECTROSCOPY authKW 136145 1% 39% 59
10 SLOW POSITRONS authKW 130550 1% 73% 30

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Physics, Condensed Matter 19026 32% 0% 1704
2 Nuclear Science & Technology 9211 13% 0% 673
3 Physics, Atomic, Molecular & Chemical 5486 14% 0% 723
4 Physics, Applied 4822 22% 0% 1143
5 Polymer Science 4358 12% 0% 624
6 Chemistry, Physical 3551 20% 0% 1042
7 Physics, Multidisciplinary 3530 13% 0% 700
8 Microscopy 3179 3% 0% 145
9 Instruments & Instrumentation 3142 8% 0% 446
10 Materials Science, Multidisciplinary 3063 20% 0% 1044

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 NUCL METHODS 117744 1% 60% 33
2 RCNT 74345 0% 83% 15
3 AUSSENSTELLE HALLE 65884 0% 92% 12
4 CHIM NUCL 65052 0% 58% 19
5 NUKL FESTKORPERPHYS 58385 1% 22% 44
6 RCNST 43796 0% 82% 9
7 ADSORPT 41715 0% 35% 20
8 PHYS E 21 38064 0% 80% 8
9 STRUCT PHYS PROPERTIES 30588 0% 86% 6
10 ANGEW PHYS MESSTECH 27093 0% 33% 14

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 MATERIALS SCIENCE FORUM 55773 8% 2% 405
2 RADIATION PHYSICS AND CHEMISTRY 40023 5% 3% 257
3 ACTA PHYSICA POLONICA A 19424 4% 2% 200
4 APPLIED SURFACE SCIENCE 11671 5% 1% 272
5 PHYSICAL REVIEW B 6402 8% 0% 446
6 JOURNAL OF PHYSICS F-METAL PHYSICS 5905 1% 2% 45
7 NUKLEONIKA 5303 1% 2% 37
8 JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 5283 2% 1% 91
9 JOURNAL OF PHYSICS-CONDENSED MATTER 4684 3% 1% 161
10 PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 4434 2% 1% 127

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 POSITRON ANNIHILATION 1756079 11% 49% 601 Search POSITRON+ANNIHILATION Search POSITRON+ANNIHILATION
2 POSITRONIUM 541503 4% 47% 193 Search POSITRONIUM Search POSITRONIUM
3 FREE VOLUME 365303 5% 23% 263 Search FREE+VOLUME Search FREE+VOLUME
4 POSITRON BEAM 349085 2% 68% 86 Search POSITRON+BEAM Search POSITRON+BEAM
5 POSITRON LIFETIME 334642 2% 51% 110 Search POSITRON+LIFETIME Search POSITRON+LIFETIME
6 SLOW POSITRON BEAM 225797 1% 62% 61 Search SLOW+POSITRON+BEAM Search SLOW+POSITRON+BEAM
7 POSITRON 218515 3% 24% 151 Search POSITRON Search POSITRON
8 POSITRON ANNIHILATION SPECTROSCOPY 161498 2% 31% 88 Search POSITRON+ANNIHILATION+SPECTROSCOPY Search POSITRON+ANNIHILATION+SPECTROSCOPY
9 POSITRON ANNIHILATION LIFETIME SPECTROSCOPY 136145 1% 39% 59 Search POSITRON+ANNIHILATION+LIFETIME+SPECTROSCOPY Search POSITRON+ANNIHILATION+LIFETIME+SPECTROSCOPY
10 SLOW POSITRONS 130550 1% 73% 30 Search SLOW+POSITRONS Search SLOW+POSITRONS

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 2


rank cluster_id2 link
1 1258 ANTIHYDROGEN//PHYSICAL REVIEW A//POSITRONIUM
2 3398 SURFACE EMISSION RATE//MEAN PENETRATION DEPTH//ORDINARY BREMSSTRAHLUNG
3 2590 MASS ATTENUATION COEFFICIENT//EFFECTIVE ATOMIC NUMBER//COMPTON SCATTERING
4 1481 TRANSIENT ENHANCED DIFFUSION//NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS//ION IMPLANTATION
5 1716 GAS SEPARATION//MIXED MATRIX MEMBRANE//JOURNAL OF MEMBRANE SCIENCE
6 1283 JOURNAL OF NUCLEAR MATERIALS//NUCLEAR SCIENCE & TECHNOLOGY//ODS STEEL
7 3585 ROTATOR PHASE//THERMODYNAM SEPARAT//SURFACE FREEZING
8 2469 DIFFUS SOLIDS GRP//ATOMIC MOBILITY//DEFECT AND DIFFUSION FORUM/JOURNAL
9 997 GLASS TRANSITION//PHYSICAL AGING//ENTHALPY RELAXATION
10 2521 SOLID STATE ENGN//POLYETHER ETHER KETONE//PEEK

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