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1

Direct observation of carbon-decorated defects in fatigued type 304 stainless steel using positron annihilation spectroscopy

P Asoka-Kumar, J.H Hartley, R.H Howell, P.A Sterne, D Akers, V Shah, A Denison

Journal:

Acta Materialia

Année:

2002

Langue:

english

Fichier:

PDF, 123 KB

english, 2002

2

Shock Hugoniot of single crystal copper

Chau, R., StoÌlken, J., Asoka-Kumar, P., Kumar, M., Holmes, N. C.

Journal:

Journal of Applied Physics

Année:

2010

Langue:

english

Fichier:

PDF, 1.23 MB

english, 2010

3

Positron annihilation spectroscopy of sputtered boron carbide films

Jacobsohn, L.G., Nastasi, M., Daemen, L.L., Jenei, Z., Asoka-Kumar, P.

Journal:

Diamond and Related Materials

Année:

2005

Langue:

english

Fichier:

PDF, 273 KB

english, 2005

4

Increased Elemental Specificity of Positron Annihilation Spectra

Asoka-Kumar, P., Alatalo, M., Ghosh, V. J., Kruseman, A. C., Nielsen, B., Lynn, K. G.

Journal:

Physical Review Letters

Année:

1996

Langue:

english

Fichier:

PDF, 1.62 MB

english, 1996

5

Hydrogen-induced breakdown of low-temperature molecular-beam epitaxy of Si

Asoka-Kumar, P., Szpala, S., Nielsen, B., Szeles, Cs., Lynn, K. G., Lanford, W. A., Shepard, C. A., Gossmann, H.-J.

Journal:

Physical Review B

Année:

1995

Langue:

english

Fichier:

PDF, 142 KB

english, 1995

6

Distribution of point defects in Si(100)/Si grown by low-temperature molecular-beam epitaxy and solid-phase epitaxy

Asoka-Kumar, P., Gossmann, H.-J., Unterwald, F. C., Feldman, L. C., Leung, T. C., Au, H. L., Talyanski, V., Nielsen, B., Lynn, K. G.

Journal:

Physical Review B

Année:

1993

Langue:

english

Fichier:

PDF, 500 KB

english, 1993

7

Characterization of silicon-implanted SiO2 layers using positron annihilation spectroscopy

G Ghislotti, B Nielsen, P Asoka-Kumar, K.G Lynn, C Szeles, C.E Bottani, S Bertoni, G.F Cerofolini, L Meda

Journal:

Thin Solid Films

Année:

1996

Langue:

english

Fichier:

PDF, 484 KB

english, 1996

8

An intense monoenergetic positron beam with an adjustable energy between 0.5 and 3.0 MeV

P. Asoka-kumar, J.S. Greenberg, S.D. Henderson, H. Huomo, M.S. Lubell, K.G. Lynn, R. Mayer, S. McCorkle, J. McDonough, J.C. Palathingal, B.F. Phlips, A. Vehanen, M. Weber, X.Y. Wu

Journal:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Année:

1993

Langue:

english

Fichier:

PDF, 761 KB

english, 1993

9

Positron annihilation studies of defects in molecular beam epitaxy grown III–V layers

M.T. Umlor, P. Asoka-Kumar, D.J. Keeble, P.W. Cooke, K.G. Lynn

Journal:

Applied Surface Science

Année:

1995

Langue:

english

Fichier:

PDF, 419 KB

english, 1995

10

Large solid angle tracking of monte carlo events of heavy ion collisions in tpc magnetic spectrometers

S.J. Lindenbaum, A. Etkin, K.J. Foley, R.W. Hackenburg, R.S. Longacre, W.A. Love, T.W. Morris, E.D. Platner, A.C. Saulys, P.P.V. Asoka-Kumar, C.S. Chan, M.A. Kramer

Journal:

Nuclear Physics A

Année:

1987

Langue:

english

Fichier:

PDF, 556 KB

english, 1987

11

Positron annihilation spectroscopy and small angle neutron scattering characterization of nanostructural features in high-nickel model reactor pressure vessel steels

Stephen C. Glade, Brian D. Wirth, G. Robert Odette, P. Asoka-Kumar

Journal:

Journal of Nuclear Materials

Année:

2006

Langue:

english

Fichier:

PDF, 470 KB

english, 2006

12

Effect of lattice structure on the positron annihilation with inner shell electrons

M. Alatalo, P. Asoka-Kumar, V.J. Ghosh, B. Nielsen, K.G. Lynn, A.C. Kruseman, A. Van Veen, T. Korhonen, M.J. Puska

Journal:

Journal of Physics and Chemistry of Solids

Année:

1998

Langue:

english

Fichier:

PDF, 475 KB

english, 1998

13

Atomic-based calculations of two-detector Doppler-broadening spectra

P.A Sterne, P Asoka-Kumar, R.H Howell

Journal:

Applied Surface Science

Année:

2002

Langue:

english

Fichier:

PDF, 96 KB

english, 2002

14

Opportunities for materials characterization using high-energy positron beams

P Asoka-Kumar, R Howell, T.G Nieh, P.A Sterne, B.D Wirth, R.H Dauskardt, K.M Flores, D Suh, G.R Odette

Journal:

Applied Surface Science

Année:

2002

Langue:

english

Fichier:

PDF, 241 KB

english, 2002

15

The momentum distribution of annihilating positron-electron pairs in aluminum

V.J. Ghosh, M. Alatalo, P. Asoka-Kumar, K.G. Lynn, A.C. Kruseman

Journal:

Applied Surface Science

Année:

1997

Langue:

english

Fichier:

PDF, 343 KB

english, 1997

16

The positron microprobe at LLNL

W Stoeffl, P Asoka-Kumar, R Howell

Journal:

Applied Surface Science

Année:

1999

Langue:

english

Fichier:

PDF, 172 KB

english, 1999

17

Positron annihilation studies of fatigue in 304 stainless steel

J.H Hartley, R.H Howell, P Asoka-Kumar, P.A Sterne, D Akers, A Denison

Journal:

Applied Surface Science

Année:

1999

Langue:

english

Fichier:

PDF, 67 KB

english, 1999

18

Development of positron diffraction and holography at LLNL

A. Hamza, P. Asoka-Kumar, W. Stoeffl, R. Howell, D. Miller, A. Denison

Journal:

Radiation Physics and Chemistry

Année:

2003

Langue:

english

Fichier:

PDF, 249 KB

english, 2003

19

Frequency Dependence of Positron Annihilation Signal from MOS Structure

H. L. Au, P. Asoka-Kumar, C. D. Beling, S. Fung, K. G. Lynn

Journal:

physica status solidi (b)

Année:

1993

Langue:

english

Fichier:

PDF, 265 KB

english, 1993

20

Studies of defects in the near-surface region and at interfaces using low energy positron beams

Journal:

Bulletin of Materials Science

Année:

1997

Langue:

english

Fichier:

PDF, 511 KB

english, 1997

21

Relation of polycrystalline Cu(In,Ga)Se2 device efficiency with junction depth and interfacial structure

Art J. Nelson, A.M. Gabor, M.A. Contreras, A. Mason, P. Asoka-Kumar, K.G. Lynn

Journal:

Solar Energy Materials and Solar Cells

Année:

1996

Langue:

english

Fichier:

PDF, 448 KB

english, 1996

22

The effects of hydrogen on viscoelastic relaxation in Zr–Ti–Ni–Cu–Be bulk metallic glasses: implications for hydrogen embrittlement

Daewoong Suh, P. Asoka-Kumar, Reinhold H. Dauskardt

Journal:

Acta Materialia

Année:

2002

Langue:

english

Fichier:

PDF, 763 KB

english, 2002

23

Variable energy positron beam characterization of defects in as-grown and annealed low temperature grown GaAs

M. T. Umlor, D. J. Keeble, P. W. Cooke, P. Asoka-Kumar, K. G. Lynn

Journal:

Journal of Electronic Materials

Année:

1993

Langue:

english

Fichier:

PDF, 369 KB

english, 1993

24

Positron annihilation study of P implanted Si

P. Asoka-Kumar, P. Sferlazzo, H.L. Au, K.G. Lynn

Journal:

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Année:

1993

Langue:

english

Fichier:

PDF, 616 KB

english, 1993

25

On the role of classical and quantum notions in channeling and the development of fast positrons as a solid state probe of valence electron and spin densities

Lene Vestergaard Hau, J.A. Golovchenko, R. Haakenaasen, A.W. Hunt, J.P. Peng, P. Asoka-Kumar, K.G. Lynn, M. Weinert, J.C. Palathingal

Journal:

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Année:

1996

Langue:

english

Fichier:

PDF, 1.06 MB

english, 1996

26

Characterization of free volume changes associated with shear band formation in Zr- and Cu-based bulk metallic glasses

Biraja P. Kanungo, Stephen C. Glade, Palakkal Asoka-Kumar, Katharine M. Flores

Journal:

Année:

2004

Langue:

english

Fichier:

PDF, 357 KB

english, 2004

27

Characterization of plasticity-induced structural changes in a Zr-based bulk metallic glass using positron annihilation spectroscopy

Katharine M. Flores, Biraja P. Kanungo, Stephen C. Glade, Palakkal Asoka-Kumar

Journal:

Journal of Non-Crystalline Solids

Année:

2007

Langue:

english

Fichier:

PDF, 188 KB

english, 2007

28

Effect of different preparation conditions on light emission from silicon implanted SiO2 layers

Ghislotti, G., Nielsen, B., Asoka-Kumar, P., Lynn, K. G., Gambhir, A., Di Mauro, L. F., Bottani, C. E.

Journal:

Journal of Applied Physics

Année:

1996

Langue:

english

Fichier:

PDF, 327 KB

english, 1996

29

Comparison of polycrystalline Cu(In,Ga)Se2 device efficiency with junction depth and interfacial structure

Nelson, Art J., Gabor, A. M., Contreras, M. A., Tuttle, J. R., Noufi, R., Sobol, P. E., Asoka-Kumar, P., Lynn, K. G.

Journal:

Journal of Applied Physics

Année:

1995

Langue:

english

Fichier:

PDF, 718 KB

english, 1995

30

Calculation of the Doppler broadening of the electron-positron annihilation radiation in defect-free bulk materials

Ghosh, V. J., Alatalo, M., Asoka-Kumar, P., Nielsen, B., Lynn, K. G., Kruseman, A. C., Mijnarends, P. E.

Journal:

Physical Review B

Année:

2000

Langue:

english

Fichier:

PDF, 109 KB

english, 2000

31

Positron Annihilation Spectroscopy Study of Interfacial Defects Formed by Anodic Oxidation of Aluminum

Hebert, K. R., Gessmann, T., Lynn, K. G., Asoka-Kumar, P.

Journal:

Journal of The Electrochemical Society

Année:

2004

Langue:

english

Fichier:

PDF, 96 KB

english, 2004

32

Positron annihilation studies of diamondlike nanocomposite films

Année:

1995

Langue:

english

Fichier:

PDF, 379 KB

english, 1995

33

Positron studies of metal-oxide-semiconductor structures

Au, H. L., Asoka-Kumar, P., Nielsen, B., Lynn, K. G.

Journal:

Journal of Applied Physics

Année:

1993

Langue:

english

Fichier:

PDF, 951 KB

english, 1993

34

Study of hydrogen interaction with SiO2/Si(100) system using positrons

Asoka-Kumar, P., Lynn, K. G., Leung, T. C., Nielsen, B., Wu, X. Y.

Journal:

Journal of Applied Physics

Année:

1991

Langue:

english

Fichier:

PDF, 690 KB

english, 1991

35

Positron annihilation studies in the field induced depletion regions of metal-oxide-semiconductor structures

Asoka-Kumar, P., Leung, T. C., Lynn, K. G., Nielsen, B., Forcier, M. P., Weinberg, Z. A., Rubloff, G. W.

Journal:

Journal of Applied Physics

Année:

1992

Langue:

english

Fichier:

PDF, 708 KB

english, 1992

36

Study of SiO2-Si and metal-oxide-semiconductor structures using positrons

Leung, T. C., Asoka-Kumar, P., Nielsen, B., Lynn, K. G.

Journal:

Journal of Applied Physics

Année:

1993

Langue:

english

Fichier:

PDF, 2.26 MB

english, 1993

37

Detection of current-induced vacancies in thin aluminum–copper lines using positrons

P. Asoka-kumar, K. O’brien, K. G. Lynn, P. J. Simpson, K. P. Rodbell

Année:

1996

Langue:

english

Fichier:

PDF, 300 KB

english, 1996

38

Single-quantum annihilation of positrons with shell-bound atomic electrons

Palathingal, J. C., Asoka-Kumar, P., Lynn, K. G., Posada, Y., Wu, X. Y.

Journal:

Physical Review Letters

Année:

1991

Langue:

english

Fichier:

PDF, 800 KB

english, 1991

39

scattering

Wu, X. Y., Asoka-Kumar, P., Greenberg, J. S., Henderson, S. D., Huomo, H., Lynn, K. G., Lubell, M. S., Mayer, R., McDonough, J., Phlips, B. F., Vehanen, A.

Journal:

Physical Review Letters

Année:

1992

Langue:

english

Fichier:

PDF, 551 KB

english, 1992

40

Te:Cl

Shan, Y. Y., Lynn, K. G., Szeles, Cs., Asoka-Kumar, P., Thio, T., Bennett, J. W., Beling, C. B., Fung, S., Becla, P.

Journal:

Physical Review Letters

Année:

1997

Langue:

english

Fichier:

PDF, 118 KB

english, 1997

41

Positron annihilation at the Si/SiO2 interface

Leung, T. C., Weinberg, Z. A., Asoka-Kumar, P., Nielsen, B., Rubloff, G. W., Lynn, K. G.

Journal:

Journal of Applied Physics

Année:

1992

Langue:

english

Fichier:

PDF, 609 KB

english, 1992

42

Point defects in Si thin films grown by molecular beam epitaxy

Gossmann, H.-J., Asoka-Kumar, P., Leung, T. C., Nielsen, B., Lynn, K. G., Unterwald, F. C., Feldman, L. C.

Journal:

Applied Physics Letters

Année:

1992

Langue:

english

Fichier:

PDF, 676 KB

english, 1992

43

Glass transition of polystyrene near the surface studied by slow-positron-annihilation spectroscopy

Jean, Y. C., Zhang, Renwu, Cao, H., Yuan, Jen-Pwu, Huang, Chia-Ming, Nielsen, B., Asoka-Kumar, P.

Journal:

Physical Review B

Année:

1997

Langue:

english

Fichier:

PDF, 79 KB

english, 1997

44

Chemical ordering around open-volume regions in bulk metallic glass Zr[sub 52.5]Ti[sub 5]Al[sub 10]Cu[sub 17.9]Ni[sub 14.6]

Asoka-Kumar, P., Hartley, J., Howell, R., Sterne, P. A., Nieh, T. G.

Journal:

Applied Physics Letters

Année:

2000

Langue:

english

Fichier:

PDF, 391 KB

english, 2000

45

Characterization of defects in Si and SiO2−Si using positrons

Asoka-Kumar, P., Lynn, K. G., Welch, D. O.

Journal:

Journal of Applied Physics

Année:

1994

Langue:

english

Fichier:

PDF, 6.40 MB

english, 1994

46

Microstructure of thermally grown and deposited alumina films probed with positrons

Somieski, Bertram, Hulett, Lester D., Xu, Jun, Pint, Bruce A., Tortorelli, Peter F., Nielsen, Bent, Asoka-Kumar, Palakkal, Suzuki, Ryoichi, Ohdaira, Toshiyuki

Journal:

Physical Review B

Année:

1999

Langue:

english

Fichier:

PDF, 462 KB

english, 1999

47

Quantum Channeling Effects for 1 MeV Positrons

Haakenaasen, R., Vestergaard Hau, Lene, Golovchenko, J. A., Palathingal, J. C., Peng, J. P., Asoka-Kumar, P., Lynn, K. G.

Journal:

Physical Review Letters

Année:

1995

Langue:

english

Fichier:

PDF, 261 KB

english, 1995

48

Low-temperature positron transport in semi-insulating GaAs

Shan, Y. Y., Lynn, K. G., Asoka-Kumar, P., Fung, S., Beling, C. B.

Journal:

Physical Review B

Année:

1997

Langue:

english

Fichier:

PDF, 161 KB

english, 1997

49

/Si interface properties using positrons

Asoka-Kumar, P., Lynn, K. G., Leung, T. C., Nielsen, B., Rubloff, G. W., Weinberg, Z. A.

Journal:

Physical Review B

Année:

1991

Langue:

english

Fichier:

PDF, 180 KB

english, 1991

50

Characterization of Free Volume in a Bulk Metallic Glass Using Positron Annihilation Spectroscopy

Flores, K. M., Suh, D., Dauskardt, R. H., Asoka-Kumar, P., Sterne, P. A., Howell, R. H.

Journal:

Journal of Materials Research

Année:

2002

Langue:

english

Fichier:

PDF, 568 KB

english, 2002