High lying E0 strength in C-12

Journals published by the American Physical Society can be found at http://publish.aps.org/The excitation region in C-12 from 7 MeV<E-x<60 MeV was studied with inelastic scattering of 240-MeV alpha particles at small angles including 0 degrees where E0 strength is enhanced. The strengths of known 0(+) states at E-x = 7.655 MeV and E-x = 10.3 MeV were obtained and E0 strength was observed to be distributed between E-x = 14 MeV and E-x = 30 MeV with a centroid of 21.5 +/- 0.4 MeV and an ms width of 3.1 +/- 0.2 MeV containing 14.5 +/- 4.0% of the isoscalar E0 energy-weighted sum rule. Angular distributions and strengths of the E-x =4.439 MeV 2(+), 9.641 MeV 3(-), and 10.844 MeV 1(-) states were also obtained. [S0556-2813(98)05704-5]

Isoscalar electric multipole strength in C-12

Journals published by the American Physical Society can be found at http://publish.aps.org/The excitation region in C-12 below E-x=45 MeV was studied using 240 MeV alpha-particle scattering. Elastic scattering was measured from theta(c.m.)=3.8degrees to 49.4degrees and density dependant folding optical model parameters were obtained. Inelastic scattering to the 4.44 MeV 2(+), 7.65 MeV 0(+), 9.64 MeV 3(-), 10.3 MeV 0(+), and 10.84 MeV 1(-) states was measured and B(EL) values obtained. Inelastic scattering exciting C-12 to 10 MeVless than or equal toE(x)less than or equal to12.5 MeV was measured from 1.4degreesless than or equal totheta(c.m.)less than or equal to10degrees and to 12.5 MeVless than or equal toE(x)less than or equal to45 MeV from 1.4degreesless than or equal totheta(c.m.)less than or equal to16degrees and E0, E1, E2, and E3 strength distributions were obtained. Strength was identified corresponding to 27+/-5, 78+/-9, and 51+/-7% of the isoscalar E0, E1, and E2 energy weighted sum rule (EWSR), respectively, with centroids of 21.9+/-0.3, 27.5+/-0.4, and 22.6+/-0.5 MeV and rms widths of 4.8+/-0.5, 7.6+/-0.6, and 6.8+/-0.6 MeV. Less than 7% of the E3 EWSR strength was identified

Isoscalar giant resonances in Si-28 and the mass dependence of nuclear compressibility

Journals published by the American Physical Society can be found at http://publish.aps.org/The giant resonance region from 8 MeV < E-x < 55 MeV in Si-28 has been studied with inelastic scattering of 240 MeV alpha particles at small angles including 0degrees. Strength corresponding to 81 +/- 10%, 68 +/- 9%, and 15 +/-4% of the isoscalar E0, E2, and E1 sum rules, respectively, was identified with centroids of 21.25 +/-0.38 MeV, 18.54 +/- 0.25 MeV, 19.15 +/- 0.60 MeV, and rms widths of 6.4 +/- 0.6 MeV, 4.7 +/- 0.6 MeV, and 6.9 +/- 0.7 MeV. The mass dependence of the compression modulus of finite nuclei is shown to be reasonably well reproduced from A = 24 to 208 in relativistic mean field calculations with the NLC interaction having K-nm 5225 MeV and in nonrelativistic calculations with the RATP interaction having K-nm 5240 MeV

Splitting of the giant monopole and quadrupole resonances in Sm-154

Journals published by the American Physical Society can be found at http://publish.aps.org/Strength functions for the isoscalar giant monopole and quadrupole resonances in Sm-154 have been measured with inelastic scattering of 240 MeV alpha particles at small angles. The E0 strength distribution containing (104(-20)(+15))% of the energy-weighted sum rule (EWSR) is consistent with two peaks at E-x = 12.1 +/- 0.4 MeV and 15.5 +/- 0.3 MeV containing (36 +/- 10)% and (68 /- 9)% of the EWSR and the E2 strength distribution containing (103(-20)(+18))% of the EWSR is consistent with three peaks at E-x = 11.3 +/- 0.2 MeV, 14.5 +/- 0.5 MeV, and 17.5 +/- 0.5 MeV containing (44 +/- 7)%, (44 +/- 8)%, and (15 +/- 8)%, respectively, of the EWSR. [S0556-2813(99)04812-8]

Isoscalar E0 strength between 6 and 11 MeV in Ca-40

Journals published by the American Physical Society can be found at http://publish.aps.org/The region from 6<E-x<11 MeV in Ca-40 has been studied with inelastic scattering of 240 MeV alpha particles at small angles including 0degrees . Strength corresponding to 3.2+/-1.0% of the isoscalar E0 sum rule was identified with a centroid of 8.7+/-0.30 MeV

Isoscalar giant resonances for nuclei with mass between 56 and 60

Journals published by the American Physical Society can be found at http://publish.aps.org/The giant resonance region from 10 MeV < E-x < 62 MeV in Fe-56, Ni-58, and Ni-60 has been studied with inelastic scattering of 240 MeV alpha particles at small angles, including 0 degrees. Most of the expected isoscalar E0 and E2 strength has been identified below E-x = 40 MeV. Between 56 and 72% of the isoscalar E1 strength has been located in these nuclei. The mass dependence of the giant monopole energy between A = 40 and 90 is compared to relativistic and nonrelativistic calculations for interactions with compressibility of nuclear matter K-NM similar to 211-225 MeV

Solution-based growth of ZnO nanorods for light-emitting devices: Hydrothermal vs. electrodeposition

ZnO nanorods have been grown by two inexpensive, solution-based, low-temperature methods: hydrothermal growth and electrodeposition. Heterojunction n-ZnO nanorods/p-GaN light-emitting diodes have been studied for different nanorod growth methods and different preparation of the seed layer. We demonstrate that both the nanorod properties and the device performance are strongly dependent on the growth method and seed layer. All the devices exhibit light emission under both forward and reverse bias, and the emission spectra can be tuned by ZnO nanorod deposition conditions. Electrodeposition of rods or a seed layer results in yellow emission, while conventional hydrothermal growth results in violet emission. © The Author(s) 2010. This article is published with open access at Springerlink.com.published_or_final_versionSpringer Open Choice, 01 Dec 201

Elastin is Localised to the Interfascicular Matrix of Energy Storing Tendons and Becomes Increasingly Disorganised With Ageing

Tendon is composed of fascicles bound together by the interfascicular matrix (IFM). Energy storing tendons are more elastic and extensible than positional tendons; behaviour provided by specialisation of the IFM to enable repeated interfascicular sliding and recoil. With ageing, the IFM becomes stiffer and less fatigue resistant, potentially explaining why older tendons become more injury-prone. Recent data indicates enrichment of elastin within the IFM, but this has yet to be quantified. We hypothesised that elastin is more prevalent in energy storing than positional tendons, and is mainly localised to the IFM. Further, we hypothesised that elastin becomes disorganised and fragmented, and decreases in amount with ageing, especially in energy storing tendons. Biochemical analyses and immunohistochemical techniques were used to determine elastin content and organisation, in young and old equine energy storing and positional tendons. Supporting the hypothesis, elastin localises to the IFM of energy storing tendons, reducing in quantity and becoming more disorganised with ageing. These changes may contribute to the increased injury risk in aged energy storing tendons. Full understanding of the processes leading to loss of elastin and its disorganisation with ageing may aid in the development of treatments to prevent age related tendinopathy

ZnO nanorod/GaN light-emitting diodes : the origin of yellow and violet emission bands under reverse and forward bias

Author name used in this publication: Xinyi ChenAuthor name used in this publication: Alan Man Ching NgAuthor name used in this publication: Aleksandra B DjurišićAuthor name used in this publication: Kok Wai CheahAuthor name used in this publication: Patrick Wai Keung Fong2011-2012 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe