المؤلفون: Lee, T. S.^{Aff1, Aff2, Aff3, IDs10434024151494_cor1}, Li, I.^{Aff1, Aff3}, Peric, B., Saw, R. P. M.^{Aff1, Aff3, Aff5, Aff6}, Duprat, J. P., Bertolli, E., Spillane, J. B., van Leeuwen, B. L., Moncrieff, M., Sommariva, A., Allan, C. P., de Wilt, J. H. W., Jones, R. Pritchard-, Geh, J. L. C., Howle, J. R.^{Aff3, Aff16}, Spillane, A. J.^{Aff1, Aff2, Aff3, Aff6}

المصدر: Annals of Surgical Oncology. 31(6):4061-4070

المؤلفون: Heine M., Fruet G., Courtin S., Jenkins D.G., Adsley P., Brown A., Canavan R., Catford W.N., Charon E., Curien D., Della Negra S., Duprat J., Hammache F., Lesrel J., Lotay G., Meyer A., Monpribat E., Montanari D., Morris L., Moukaddam M., Nippert J., Podolyák Zs., Regan P.H., Ribaud I., Richer M., Rudigier M., Shearman R., de Séréville N., Stodel C.

المصدر: EPJ Web of Conferences, Vol 260, p 01004 (2022)

مصطلحات موضوعية: Physics, QC1-999

الوصف: We present 12C+12C direct fusion measurements with STELLA UKFATIMA, that reach into the region of astrophysics interest relevant to massive stars (M⊙ ≈ 25) using self-supporting thin rotating carbon foils [1]. We demonstrate that detecting gammas and light charged particles in coincidence with nanosecond timing is key for effective background reduction achieving reliable measurements in the sub-nanobarn range. We give details about core developments of the detection apparatus as well as the coincidence-analysis procedure of low count statistics. The present data largely follows the phenomenological hindrance interpolation and shows indication for resonant behaviour at the lowest energy explored.

وصف الملف: electronic resource

Relation: https://www.epj-conferences.org/articles/epjconf/pdf/2022/04/epjconf_nic16th2022_01004.pdf; https://doaj.org/toc/2100-014X

URL الوصول: https://doaj.org/article/358ec56de48a4eecaad61028c54752a1

المؤلفون: Lee, T. S.^{Aff1, Aff2, Aff3, IDs10434024152624_cor1}, Li, I.^{Aff1, Aff3}, Peric, B., Saw, R. P. M.^{Aff1, Aff3, Aff5, Aff6}, Duprat, J. P., Bertolli, E., Spillane, J. B., van Leeuwen, B. L., Moncrieff, M., Sommariva, A., Allan, C., de Wilt, J. H. W., Pritchard-Jones, R., Geh, J. L. C., Howle, J. R.^{Aff3, Aff16}, Spillane, A. J.^{Aff1, Aff2, Aff3, Aff6}

المصدر: Annals of Surgical Oncology. 31(7):4609-4610

المؤلفون: Kokoulina, E., Matter, A., Lopez, B., Pantin, E., Ysard, N., Weigelt, G., Habart, E., Varga, J., Jones, A., Meilland, A., Dartois, E., Klarmann, L., Augereau, J. -C., van Boekel, R., Hogerheijde, M., Yoffe, G., Waters, L. B. F. M., Dominik, C., Jaffe, W., Millour, F., Henning, Th., Hofmann, K. -H., Schertl, D., Lagarde, S., Petrov, R. G., Antonelli, P., Allouche, F., Berio, P., Robbe-Dubois, S., Abraham, P., Beckmann, U., Bensberg, A., Bettonvil, F., Bristow, P., Cruzalèbes, P., Danchi, W. C., Dannhoff, M., Graser, U., Heininger, M., Labadie, L., Lehmitz, M., Leinert, C., Meisenheimer, K., Paladini, C., Percheron, I., Stee, Ph., Woillez, J., Wolf, S., Zins, G., Delbo, M., Drevon, J., Duprat, J., Rosas, V. Gámez, Hocdé, V., Hron, J., Hummel, C. A., Isbell, J. W., Leftley, J., Soulain, A., Vakili, F., Wittkowski, M.

المصدر: A&A 652, A61 (2021)

مصطلحات موضوعية: Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics

الوصف: Carbon is one of the most abundant components in the Universe. While silicates have been the main focus of solid phase studies in protoplanetary discs (PPDs), little is known about the solid carbon content especially in the planet-forming regions ($\sim $0.1 to 10 au). Fortunately, several refractory carbonaceous species present C-H bonds (such as hydrogenated nano-diamond and amorphous carbon as well as polycyclic aromatic hydrocarbons (PAHs)), which generate infrared (IR) features that can be used to trace the solid carbon reservoirs. The new mid-IR instrument MATISSE, installed at the Very Large Telescope Interferometer (VLTI), can spatially resolve the inner regions ($\sim$ 1 to 10 au) of PPDs and locate, down to the au-scale, the emission coming from carbon grains. Our aim is to provide a consistent view on the radial structure, down to the au-scale, as well as basic physical properties and the nature of the material responsible for the IR continuum emission in the inner disk region around HD 179218. We implemented a temperature-gradient model to interpret the disk IR continuum emission, based on a multiwavelength dataset comprising a broadband spectral energy distribution (SED) and VLTI H-, L-, and N-bands interferometric data obtained in low spectral resolution. Then, we added a ring-like component, representing the carbonaceous L-band features-emitting region, to assess its detectability in future higher spectral resolution observations employing mid-IR interferometry.

URL الوصول: http://arxiv.org/abs/2106.12947

المؤلفون: Dartois, E., Engrand, C., Duprat, J., Godard, M., Charon, E., Delauche, L., Sandt, C., Borondics, F.

المصدر: A&A 609, A65 (2018)

مصطلحات موضوعية: Astrophysics - Earth and Planetary Astrophysics

الوصف: UltraCarbonaceous Antarctic MicroMeteorites (UCAMMs) represent a small fraction of interplanetary dust particles reaching the Earth's surface and contain large amounts of an organic component not found elsewhere. They are most probably sampling a contribution from the outer regions of the solar system to the local interplanetary dust particle flux. We characterize UCAMMs composition focusing on the organic matter, and compare the results to the insoluble organic matter (IOM) from primitive meteorites, IDPs, and the Earth.We acquired synchrotron infrared microspectroscopy and micro-Raman spectra of eight UCAMMs from the Concordia/CSNSM collection, as well as N/C atomic ratios determined with an electron microprobe. The spectra are dominated by an organic component with a low aliphatic CH versus aromatic C=C ratio, and a higher nitrogen fraction and lower oxygen fraction compared to carbonaceous chondrites and IDPs. The UCAMMs carbonyl absorption band is in agreement with a ketone or aldehyde functional group. Some of the IR and Raman spectra show a C$\equiv$N band corresponding to a nitrile. The absorption band profile from 1400 to 1100 cm-1 is compatible with the presence of C-N bondings in the carbonaceous network, and is spectrally different from that reported in meteorite IOM. We confirm that the silicate-to-carbon content in UCAMMs is well below that reported in IDPs and meteorites. Together with the high nitrogen abundance relative to carbon building the organic matter matrix, the most likely scenario for the formation of UCAMMs occurs via physicochemical mechanisms taking place in a cold nitrogen rich environment, like the surface of icy parent bodies in the outer solar system. The composition of UCAMMs provides an additional hint of the presence of a heliocentric positive gradient in the C/Si and N/C abundance ratios in the solar system protoplanetary disc evolution.
Comment: 12 pages, 9 figures

URL الوصول: http://arxiv.org/abs/1711.00647

المؤلفون: Dartois, E., Chabot, M., Id Barkach, T., Rothard, H., Boduch, P., Augé, B., Duprat, J., Rojas, J.

المصدر: In Nuclear Inst. and Methods in Physics Research, B 15 December 2020 485:13-19

المؤلفون: Fiallos Aguilar, M., Duprat, J.

المصدر: 27th Annual Simulation Symposium Simulation Symposium, 1994., 27th Annual. :13-22 1994

Relation: 27th Annual Simulation Symposium

المؤلفون: Henderson, Michael A.^Aff1, Gyorki, D., Burmeister, B. H., Ainslie, J., Fisher, R., Di Iulio, J., Smithers, B. M., Hong, A., Shannon, K., Scolyer, R. A., Carruthers, S., Coventry, B. J., Babington, S., Duprat, J., Hoekstra, H. J., Thompson, J. F.

المصدر: Annals of Surgical Oncology. 26(13):4663-4672

المؤلفون: Duprat, J., Herreros, Y., Kla, S.

المصدر: [1991] Proceedings 10th IEEE Symposium on Computer Arithmetic Computer Arithmetic, 1991. Proceedings., 10th IEEE Symposium on. :2-9 1991

Relation: Proceedings 10th IEEE Symposium on Computer Arithmetic

المؤلفون: Corbaz, G., Duprat, J., Hochet, B., Muller, J.-M.

المصدر: Proceedings of the International Conference on Application Specific Array Processors Application Specific Array Processors, 1991. Proceedings of the International Conference on. :13-24 1991

Relation: Proceedings of the International Conference on Application Specific Array Processors