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- Maeda, Y., et al.
(författare)
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Differential cross section and analyzing power measurements for (n)over-right-arrowd elastic scattering at 248 MeV
- 2007
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 76:1, s. 014004-
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Tidskriftsartikel (refereegranskat)abstract
- The differential cross sections and vector analyzing powers for nd elastic scattering at E-n=248 MeV were measured for 10 degrees-180 degrees in the center-of-mass (c.m.) system. To cover the wide angular range, the experiments were performed separately by using two different setups for forward and backward angles. The data are compared with theoretical results based on Faddeev calculations with realistic nucleon-nucleon (NN) forces such as AV18, CD Bonn, and Nijmegen I and II, and their combinations with the three-nucleon forces (3NFs), such as Tucson-Melbourne 99 (TM99), Urbana IX, and the coupled-channel potential with Delta-isobar excitation. Large discrepancies are found between the experimental cross sections and theory with only 2N forces for theta(c.m.)>90 degrees. The inclusion of 3NFs brings the theoretical cross sections closer to the data but only partially explains this discrepancy. For the analyzing power, no significant improvement is found when 3NFs are included. Relativistic corrections are shown to be small for both the cross sections and the analyzing powers at this energy. For the cross sections, these effects are mostly seen in the very backward angles. Compared with the pd cross section data, quite significant differences are observed at all scattering angles that cannot be explained only by the Coulomb interaction, which is usually significant at small angles.
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| 2. |
- Sagrado Garcia, I. C., et al.
(författare)
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Neutron production in neutron-induced reactions at 96 MeV on (56)Fe and (208)Pb
- 2011
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 84:4, s. 044619-
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Tidskriftsartikel (refereegranskat)abstract
- Double-differential cross sections for neutron production were measured in 96-MeV neutron-induced reactions at The Svedberg Laboratory in Uppsala, Sweden. Measurements for Fe and Pb targets were performed using two independent setups: DECOI-DEMON, time-of-flight telescope dedicated to the detection of emitted neutrons with energies between a few and 50 MeV and CLODIA-SCANDAL device devoted to measuring emitted neutrons with energies above 40 MeV. Double-differential cross sections were measured for an angular range between 15 and 98 deg and with low-energy thresholds (approximate to 2 MeV). Angular and energy distributions and total neutron emission cross sections have been obtained from those measurements. Results have been compared with predictions given by different models included in several transport codes (MCNPX, GEANT, TALYS, PHITS, and DYWAN) and with other experimental data (the EXFOR database).
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| 8. |
- Wismans, Jac, 1948, et al.
(författare)
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Development and Evaluation of the ES-2 Dummy
- 2001
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Over the last year, the European Enhanced Vehicle-safety Committee Working Group 12 has assessed and reviewed the performance of the enhanced anthropomorphic test device for lateral impacts, EUROSID-2 (ES-2). The objectives for this work have been the following: - To verify whether the proposed design is addressing the shortcomings of the regulatory test device EUROSID-1 as identified previously by EEVC and NHTSA- To make sure that the original EUROSID-1 biofidelity and performance in normal test conditions is preserved. - To reach a well-balanced conclusion, the working group has undertaken a test program to assess the most important requirements for the ES-2 dummy, biofidelity, sensitivity, repeatability, handling, durability, certification and full-scale performance in comparison with EUROSID-1.In addition, but no less important, the working group has reviewed and explored the findings of full-scale tests conducted at several member organisations within ACEA. ACEA has reported the most important findings in September 2000. Subsequently, WG 12 has further investigated the issues raised in this report. On the basis of this work, the working group has concluded the following with regards to the ES-2 specifications and performance:The ES-2 prototype as tested is superior to current test device EUROSID-1 and, hence, a more appropriate test device for regulatory testing. The important shortcomings of the EUROSID-1 have been satisfactorily addressed with ES-2, whilst biofidelity is maintained, in some areas even somewhat improved. It should be noted, however, that the assessment of thorax biofidelity was based on deflection and force-time data only, and does not incorporate an assessment of V*C. It is recommended to adopt the hardware design without further modification and to use the new proposed certification procedures, with the exception of the high velocity pelvis test.Overall test results in full-scale tests have shown that some critical dummy measurement values for ES-2 have increased compared to EUROSID-1, in particular rib deflection, 17%, and V*C, 23%1 on average. Other values on the other hand have brought down such as the pubic force (10%) due to improved leg interaction. Contrary to the full-scale results, the ES-2 gave equal or lower values for all critical measurements in the biofidelity tests.For the large majority of vehicles tested, the different results would not affect pass or fail with respect to current regulatory limits. It should be noted, however, that, maintaining the rating levels in consumer testing, ES-2 results would lead motoring consumers to believe the protection offered in side impact has decreased while in fact the safety performance of these vehicles has not changed.A force transducer has been developed to measure the force applied to the back plate. It is recommended to use the force transducer in full vehicle assessment.Finally, the working group believes the ES-2 dummy forms a solid basis for interim harmonisation and will further support activities to help realise this objective.
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| 9. |
- Öhrn, Angelica, et al.
(författare)
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Elastic scattering of 96 MeV neutrons from iron, yttrium, and lead
- 2008
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 77:2, s. 024605-
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Tidskriftsartikel (refereegranskat)abstract
- Data on elastic scattering of 96 MeV neutrons from Fe-56, Y-89, and Pb-208 in the angular interval 10-70 degrees are reported. The previously published data on Pb-208 have been extended, as a new method has been developed to obtain more information from data, namely to increase the number of angular bins at the most forward angles. A study of the deviation of the zero-degree cross section from Wick's limit has been performed. It was shown that the data on Pb-208 are in agreement with Wick's limit while those on the lighter nuclei overshoot the limit significantly. The results are compared with modern optical model predictions, based on phenomenology and microscopic nuclear theory. The data on Fe-56, Y-89, and Pb-208 are in general in good agreement with the model predictions.
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