SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Johansson V.) srt2:(2015-2019);srt2:(2016)"

Sökning: WFRF:(Johansson V.) > (2015-2019) > (2016)

Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Abdallah, J., et al. (författare)
  • The Laser calibration of the ATLAS Tile Calorimeter during the LHC run 1
  • 2016
  • Ingår i: Journal of Instrumentation. - 1748-0221 .- 1748-0221. ; 11
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>This article describes the Laser calibration system of the ATLAS hadronic Tile Calorimeter that has been used during the run 1 of the LHC. First, the stability of the system associated readout electronics is studied. It is found to be stable with variations smaller than 0.6 %. Then, the method developed to compute the calibration constants, to correct for the variations of the gain of the calorimeter photomultipliers, is described. These constants were determined with a statistical uncertainty of 0.3 % and a systematic uncertainty of 0.2 % for the central part of the calorimeter and 0.5 % for the end-caps. Finally, the detection and correction of timing mis-configuration of the Tile Calorimeter using the Laser system are also presented.</p>
  •  
2.
  • Reifarth, R., et al. (författare)
  • Nuclear astrophysics with radioactive ions at FAIR
  • 2016
  • Ingår i: Journal of Physics: Conference Series. ; 665:1
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-process, β-decay chains. These nuclei are attributed to the p and rp process. For all those processes, current research in nuclear astrophysics addresses the need for more precise reaction data involving radioactive isotopes. Depending on the particular reaction, direct or inverse kinematics, forward or time-reversed direction are investigated to determine or at least to constrain the desired reaction cross sections. The Facility for Antiproton and Ion Research (FAIR) will offer unique, unprecedented opportunities to investigate many of the important reactions. The high yield of radioactive isotopes, even far away from the valley of stability, allows the investigation of isotopes involved in processes as exotic as the r or rp processes.</p>
  •  
3.
  • Reifarthl, R., et al. (författare)
  • Nuclear astrophysics with radioactive ions at FAIR
  • 2016
  • Ingår i: 6th Nuclear Physics in Astrophysics Conference (NPA),Lisbon, Portugal,2013-05-19 - 2013-05-24. - IOP Publishing.
  • Konferensbidrag (refereegranskat)abstract
    • The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-process beta-decay chains. These nuclei are attributed to the p and rp process. For all those processes, current research in nuclear astrophysics addresses the need for more precise reaction data involving radioactive isotopes. Depending on the particular reaction, direct or inverse kinematics, forward or time-reversed direction are investigated to determine or at least to constrain the desired reaction cross sections. The Facility for Antiproton and Ion Research (FAIR) will offer unique, unprecedented opportunities to investigate many of the important reactions. The high yield of radioactive isotopes, even far away from the valley of stability, allows the investigation of isotopes involved in processes as exotic as the r or rp processes.
4.
  • Reifarthl, R., et al. (författare)
  • Nuclear astrophysics with radioactive ions at FAIR
  • 2016
  • Ingår i: NUCLEAR PHYSICS IN ASTROPHYSICS VI (NPA6). - Institute of Physics Publishing (IOPP).
  • Konferensbidrag (refereegranskat)abstract
    • <p>The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-process beta-decay chains. These nuclei are attributed to the p and rp process. For all those processes, current research in nuclear astrophysics addresses the need for more precise reaction data involving radioactive isotopes. Depending on the particular reaction, direct or inverse kinematics, forward or time-reversed direction are investigated to determine or at least to constrain the desired reaction cross sections. The Facility for Antiproton and Ion Research (FAIR) will offer unique, unprecedented opportunities to investigate many of the important reactions. The high yield of radioactive isotopes, even far away from the valley of stability, allows the investigation of isotopes involved in processes as exotic as the r or rp processes.</p>
  •  
5.
  • Reifarthl, R., et al. (författare)
  • Nuclear astrophysics with radioactive ions at FAIR
  • 2016
  • Ingår i: NUCLEAR PHYSICS IN ASTROPHYSICS VI (NPA6).
  • Konferensbidrag (refereegranskat)abstract
    • <p>The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-process beta-decay chains. These nuclei are attributed to the p and rp process. For all those processes, current research in nuclear astrophysics addresses the need for more precise reaction data involving radioactive isotopes. Depending on the particular reaction, direct or inverse kinematics, forward or time-reversed direction are investigated to determine or at least to constrain the desired reaction cross sections. The Facility for Antiproton and Ion Research (FAIR) will offer unique, unprecedented opportunities to investigate many of the important reactions. The high yield of radioactive isotopes, even far away from the valley of stability, allows the investigation of isotopes involved in processes as exotic as the r or rp processes.</p>
  •  
6.
  • Thies, R., et al. (författare)
  • Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes
  • 2016
  • Ingår i: Physical Review C - Nuclear Physics. - American Physical Society. - 0556-2813. ; 93:5
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Models describing nuclear fragmentation and fragmentation fission deliver important input for planning nuclear physics experiments and future radioactive ion beam facilities. These models are usually benchmarked against data from stable beam experiments. In the future, two-step fragmentation reactions with exotic nuclei as stepping stones are a promising tool for reaching the most neutron-rich nuclei, creating a need for models to describe also these reactions. Purpose: We want to extend the presently available data on fragmentation reactions towards the light exotic region on the nuclear chart. Furthermore, we want to improve the understanding of projectile fragmentation especially for unstable isotopes. Method: We have measured projectile fragments from C10,12-18 and B10-15 isotopes colliding with a carbon target. These measurements were all performed within one experiment, which gives rise to a very consistent data set. We compare our data to model calculations. Results: One-proton removal cross sections with different final neutron numbers (1pxn) for relativistic C10,12-18 and B10-15 isotopes impinging on a carbon target. Comparing model calculations to the data, we find that the epax code is not able to describe the data satisfactorily. Using abrabla07 on the other hand, we find that the average excitation energy per abraded nucleon needs to be decreased from 27 MeV to 8.1 MeV. With that decrease abrabla07 describes the data surprisingly well. Conclusions: Extending the available data towards light unstable nuclei with a consistent set of new data has allowed a systematic investigation of the role of the excitation energy induced in projectile fragmentation. Most striking is the apparent mass dependence of the average excitation energy per abraded nucleon. Nevertheless, this parameter, which has been related to final-state interactions, requires further study.
7.
  •  
8.
  • Di Cesare, M., et al. (författare)
  • Trends in adult body-mass index in 200 countries from 1975 to 2014: a pooled analysis of 1698 population-based measurement studies with 19·2 million participants
  • 2016
  • Ingår i: Lancet (London, England). - 1474-547X. ; 387:10026, s. 1377-1396
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Underweight and severe and morbid obesity are associated with highly elevated risks of adverse health outcomes. We estimated trends in mean body-mass index (BMI), which characterises its population distribution, and in the prevalences of a complete set of BMI categories for adults in all countries. Methods We analysed, with use of a consistent protocol, population-based studies that had measured height and weight in adults aged 18 years and older. We applied a Bayesian hierarchical model to these data to estimate trends from 1975 to 2014 in mean BMI and in the prevalences of BMI categories (<18.5 kg/m 2 [underweight], 18.5 kg/m 2 to <20 kg/m 2 , 20 kg/m 2 to <25 kg/m 2 , 25 kg/m 2 to <30 kg/m 2 , 30 kg/m 2 to <35 kg/m 2 , 35 kg/m 2 to <40 kg/m 2 , ≥40 kg/m 2 [morbid obesity]), by sex in 200 countries and territories, organised in 21 regions. We calculated the posterior probability of meeting the target of halting by 2025 the rise in obesity at its 2010 levels, if post-2000 trends continue. Findings We used 1698 population-based data sources, with more than 19.2 million adult participants (9.9 million men and 9.3 million women) in 186 of 200 countries for which estimates were made. Global age-standardised mean BMI increased from 21.7 kg/m 2 (95% credible interval 21.3-22.1) in 1975 to 24.2 kg/m 2 (24.0-24.4) in 2014 in men, and from 22.1 kg/m 2 (21.7-22.5) in 1975 to 24.4 kg/m 2 (24.2-24.6) in 2014 in women. Regional mean BMIs in 2014 for men ranged from 21.4 kg/m 2 in central Africa and south Asia to 29.2 kg/m 2 (28.6-29.8) in Polynesia and Micronesia; for women the range was from 21.8 kg/m 2 (21.4-22.3) in south Asia to 32.2 kg/m 2 (31.5-32.8) in Polynesia and Micronesia. Over these four decades, age-standardised global prevalence of underweight decreased from 13.8% (10.5-17.4) to 8.8% (7.4-10.3) in men and from 14.6% (11.6-17.9) to 9.7% (8.3-11.1) in women. South Asia had the highest prevalence of underweight in 2014, 23.4% (17.8-29.2) in men and 24.0% (18.9-29.3) in women. Age-standardised prevalence of obesity increased from 3.2% (2.4-4.1) in 1975 to 10.8% (9.7-12.0) in 2014 in men, and from 6.4% (5.1-7.8) to 14.9% (13.6-16.1) in women. 2.3% (2.0-2.7) of the world's men and 5.0% (4.4-5.6) of women were severely obese (ie, have BMI ≥35 kg/m 2 ). Globally, prevalence of morbid obesity was 0.64% (0.46-0.86) in men and 1.6% (1.3-1.9) in women. Interpretation If post-2000 trends continue, the probability of meeting the global obesity target is virtually zero. Rather, if these trends continue, by 2025, global obesity prevalence will reach 18% in men and surpass 21% in women; severe obesity will surpass 6% in men and 9% in women. Nonetheless, underweight remains prevalent in the world's poorest regions, especially in south Asia.
9.
  • Datta, U., et al. (författare)
  • Direct experimental evidence for a multiparticle-hole ground state configuration of deformed Mg-33
  • 2016
  • Ingår i: Physical Review C. - 2469-9985. ; 94:3
  • Tidskriftsartikel (refereegranskat)abstract
    • The first direct experimental evidence of a multiparticle-hole ground state configuration of the neutron-rich Mg-33 isotope has been obtained via intermediate energy (400 A MeV) Coulomb dissociation measurement. The major part similar to(70 +/- 13)% of the cross section is observed to populate the excited states of Mg-32 after the Coulomb breakup of Mg-33. The shapes of the differential Coulomb dissociation cross sections in coincidence with different core excited states favor that the valence neutron occupies both the s(1/2) and p(3/2) orbitals. These experimental findings suggest a significant reduction and merging of sd-pf shell gaps at N similar to 20 and 28. The ground state configuration of Mg-33 is predominantly a combination of Mg-32(3.0,3.5MeV; 2(-), 1(-)) circle times nu(s1/2), Mg-32(2.5MeV; 2(+)) circle times nu(p3/2), and Mg-32(0; 0(+)) circle times nu(p3/2). The experimentally obtained quantitative spectroscopic information for the valence neutron occupation of the s and p orbitals, coupled with different core states, is in agreement with Monte Carlo shell model (MCSM) calculation using 3 MeV as the shell gap at N = 20.
10.
  • Ablikim, M., et al. (författare)
  • Amplitude analysis of the π$^0$π$^0$ system produced in radiative J/ψ decays
  • 2016
  • Ingår i: PHYSICAL REVIEW D. - 2470-0010. ; 93:3
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>An amplitude analysis of the π0π0 system produced in radiative J/ψ decays is presented. In particular, a piecewise function that describes the dynamics of the π0π0 system is determined as a function of Mπ0π0 from an analysis of the (1.311±0.011)×109 J/ψ decays collected by the BESIII detector. The goal of this analysis is to provide a description of the scalar and tensor components of the π0π0 system while making minimal assumptions about the properties or number of poles in the amplitude. Such a model-independent description allows one to integrate these results with other related results from complementary reactions in the development of phenomenological models, which can then be used to directly fit experimental data to obtain parameters of interest. The branching fraction of J/ψ→γπ0π0 is determined to be (1.15±0.05)×10-3, where the uncertainty is systematic only and the statistical uncertainty is negligible.</p>
  •  
Skapa referenser, mejla, bekava och länka
Åtkomst
fritt online (33)
Typ av publikation
tidskriftsartikel (105)
konferensbidrag (8)
forskningsöversikt (2)
rapport (1)
bokkapitel (1)
doktorsavhandling (1)
visa fler...
visa färre...
Typ av innehåll
refereegranskat (114)
övrigt vetenskapligt (11)
Författare/redaktör
Bertani, M., (26)
Chen, X. (25)
Lu, Y (25)
Fang, Y (25)
Johansson, Tord, (25)
Amoroso, A., (25)
visa fler...
Bettoni, D., (25)
Bianchi, F., (25)
Calcaterra, A., (25)
Liu, X (24)
Cakir, O. (24)
Chen, G. (24)
Cai, X. (24)
Ferroli, R. Baldini (24)
Li, G. (24)
Cetin, S. A. (24)
Hu, Y (24)
Peters, K (24)
Huang, Y. (24)
Boyko, I. (24)
Dedovich, D. (24)
Wang, Z (24)
Wiedner U. (24)
Li, H. B., (24)
Liu, J., (24)
Ablikim, M. (24)
Ai, X. C., (24)
Albayrak, O., (24)
Albrecht, M., (24)
Ambrose, D. J., (24)
An, F. F., (24)
An, Q., (24)
Bai, J. Z., (24)
Ban, Y., (24)
Bennett, D. W., (24)
Bennett, J. V., (24)
Bian, J. M., (24)
Boger, E., (24)
Briere, R. A., (24)
Cai, H., (24)
Cao, G. F., (24)
Chang, J. F., (24)
Chelkov, G., (24)
Chen, H. S., (24)
Chen, J. C., (24)
Chen, M. L., (24)
Chen, S. J., (24)
Chen, X. R., (24)
Chen, Y. B., (24)
Cheng, H. P., (24)
visa färre...
Lärosäte
Uppsala universitet (36)
Karolinska Institutet (25)
Lunds universitet (18)
Göteborgs universitet (15)
Chalmers tekniska högskola (14)
Kungliga Tekniska Högskolan (13)
visa fler...
Stockholms universitet (9)
Umeå universitet (6)
Örebro universitet (1)
Linköpings universitet (1)
Mittuniversitetet (1)
VTI - Statens väg- och transportforskningsinstitut (1)
visa färre...
Språk
Engelska (118)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (62)
Medicin och hälsovetenskap (41)
Teknik (11)
Samhällsvetenskap (2)
År
 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy