Browsing Faculty Research by Title
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Xu, HM; Gagliardi, Carl A.; Ajupova, G. K.; Kokenge, B.; Lui, YW. (American Physical Society, 1996)[more][less]
Abstract: We have measured cross sections for (d,He-2)-induced reactions on Mg-26 at an energy of E(d)=125.2 MeV. The measured Gamow-Teller strength is significantly smaller than that inferred from (p,n) reactions. We demonstrate that beta(+) Gamow-Teller strengths for T-0 + 1 states deduced from (p,n) reactions may have significant systematic uncertainties due to ambiguities in the large backgrounds that must be subtracted.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.54.3266 Files in this item: 1
PhysRevC.54.3266.pdf (87.26Kb) -
Abanov, Artem; Chubukov, A. V.; Norman, M. R. (American Physical Society, 2008)[more][less]
Abstract: We consider the evolution of d(x)(2)-y(2) pairing, mediated by nearly critical spin fluctuations, with the coupling strength. We show that the onset temperature for pairing, T(*), smoothly evolves between weak and strong couplings passing through a broad maximum at intermediate coupling. At strong coupling, T(*) is of order of the magnetic exchange energy J. We argue that for all couplings, pairing is confined to the vicinity of the Fermi surface. We also find that thermal spin fluctuations only modestly reduce T(*), even at criticality, but they substantially smooth the gap anisotropy. The latter evolves with coupling being the largest at weak coupling.
Description: Journals published by the American Physical Society can be found at http://journals.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevB.78.220507 Files in this item: 1
PhysRevB.78.220507.pdf (149.6Kb) -
Tahira, Rabia; Ikram, Manzoor; Nha, Hyunchul; Zubairy, M. Suhail (American Physical Society, 2011)[more][less]
Abstract: Recently quantum beat lasers have been considered as a source of entangled radiation [S. Qamar, F. Ghafoor, M. Hillery, and M. S. Zubairy, Phys. Rev. A 77, 062308 (2008)]. We investigate and quantify the entanglement of this system when the initial cavity modes are prepared in a Gaussian two-mode state, one being a nonclassical state and the other a thermal state. It is investigated how the output entanglement varies with the nonclassicality of the input Gaussian state, thermal noise, and the strength of the driving field.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevA.83.054304 Files in this item: 1
PhysRevA.83.054304.pdf (772.4Kb) -
SASLOW, WM; Hu, Chia-Ren. (American Physical Society, 1981)[more][less]
Description: Journals published by the American Physical Society can be found at http://journals.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevB.23.4523 Files in this item: 1
PhysRevB.23.4523.pdf (1.363Mb) -
Garg, U.; Bogucki, P.; Bronson, J. D.; Lui, YW; Youngblood, David H. (American Physical Society, 1984)[more][less]
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.29.93 Files in this item: 1
PhysRevC.29.93.pdf (493.8Kb) -
Youngblood, David H.; Lui, YW; Clark, HL. (American Physical Society, 1997)[more][less]
Abstract: The giant resonance region in Ca-40 was studied with inelastic scattering of 240 MeV alpha particles at small angles including 0 degrees. A peak at E-x = 17.5 +/- 0.4 MeV with Gamma = 4.95 +/- 0.25 MeV was found to contain 33 +/- 4% of the isoscalar E0 energy-weighted-sum-mle (EWSR) strength and 57 +/- 6% of the isoscalar E2 EWSR. Evidence was found for 92 +/- 15% of the isoscalar E0 EWSR between 8 < E-x < 29 MeV with a centroid of 18.9 +/- 0.4 MeV and a rms half width of 11.1 MeV but a definitive L = 0 assignment could not be made. The resulting E-GMR is in agreement with systematics from heavier nuclei.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.55.2811 Files in this item: 1
PhysRevC.55.2811.pdf (167.4Kb) -
Youngblood, David H.; Clark, HL; Lui, YW. (American Physical Society, 1998)[more][less]
Abstract: The giant resonance region in Si-28 was studied with inelastic scattering of 240 MeV alpha particles at small angles including 0 degrees. The giant resonance peak extended from E-x=12 MeV to 35 MeV and E0 strength corresponding to 54 +/- 6% of the isoscalar EO energy weighted sum rule was identified between E-x = 11-35 MeV with a centroid of 21.5 +/- 0.3 MeV and an rms width of 5.9 +/- 0.2 MeV. E2 strength corresponding to 32 +/- 5% of the isoscalar E2 sum rule was identified with a centroid of E-x = 19.0 +/- 0.2 MeV and rms width of 1.7 +/- 0.2 MeV. Elastic scattering was measured from theta(c.m.) = 3 degrees to 47 degrees and optical parameters obtained. Inelastic scattering to states at 1.78, 6.88, 10.2, and 11.1 MeV was measured and deformation lengths and L components extracted.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.57.1134 Files in this item: 1
PhysRevC.57.1134.pdf (281.2Kb) -
Lui, YW; Clark, HL; Youngblood, David H. (American Physical Society, 2000)[more][less]
Abstract: The strength distribution of the giant monopole resonance in Ni-58 has been measured from E-x = 10 to 35 MeV using small-angle scattering of 240-MeV alpha particles. E0 strength corresponding to 74(-12)(+22)% of the E0 EWSR was found between E-x = 12.0 and 31.1 MeV with a centroid of 20.30(-0.14)(+1.69) MeV.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.61.067307 Files in this item: 1
PhysRevC.61.067307.pdf (48.22Kb) -
Lui, YW; Bronson, J. D.; Youngblood, David H.; Toba, Y.; Garg, U. (American Physical Society, 1985)[more][less]
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.31.1643 Files in this item: 1
PhysRevC.31.1643.pdf (421.2Kb) -
Youngblood, David H.; Rozsa, C. M.; Moss, JM; Brown, D. R.; Bronson, J. D. (American Physical Society, 1977)[more][less]
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.15.1644 Files in this item: 1
PhysRevC.15.1644.pdf (450.9Kb) -
Youngblood, David H.; Lui, YW; Garg, U.; Peterson, R. J. (American Physical Society, 1992)[more][less]
Abstract: Inelastic scattering of 129 MeV alpha particles has been used to excite the giant quadrupole resonance in Ni-58, Ni-60, Ni-62, Ni-64. The resonance was found to exhaust 58 +/- 12%, 76 +/- 14%, 78 +/- 14%, and 90 +/-16% of the E2 energy-weighted sum rule, respectively, for Ni-58, Ni-60, Ni-62, Ni-64.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.45.2172 Files in this item: 1
PhysRevC.45.2172.pdf (253.8Kb) -
Chen, X.; Lui, Y. -W; Clark, H. L.; Tokimoto, Y.; Youngblood, David H. (American Physical Society, 2009)[more][less]
Abstract: Giant resonances in (116)Sn were measured by inelastic scattering of (6)Li ions at E(6)Li=240 MeV over the angle range 0(degrees)-6(degrees). Isoscalar E0-E3 strength distributions were obtained with a double folding model analysis. A total of 106(-11)(+27)% of the E0 EWSR was found in the excitation energy range from 8 MeV to 30 MeV with a centroid (m(1)/m(0)) energy 15.39(-0.20)(+0.35) MeV in agreement with results obtained with alpha inelastic scattering.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.79.024320 Files in this item: 1
PhysRevC.79.024320.pdf (531.8Kb) -
Chen, X.; Lui, Y. -W; Clark, H. L.; Tokimoto, Y.; Youngblood, David H. (American Physical Society, 2009)[more][less]
Abstract: Elastic and inelastic scattering of 240 MeV (6)Li particles from (24)Mg and (28)Si were measured with the MDM spectrometer. Optical potential parameters for (6)Li+(24)Mg and (6)Li+(28)Si scattering systems were obtained by fitting elastic scattering with two different folding model potentials as well as W-S potentials. E0-E3 giant resonance strength distributions for (28)Si and (24)Mg were obtained. E0 strength corresponding to 106(-24)(+34)% of the EWSR was identified in (24)Mg and 80(-20)(+35)% was found for (28)Si between E(x)=8.0 to 40.0 MeV.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.80.014312 Files in this item: 1
PhysRevC.80.014312.pdf (1.116Mb) -
Lui, YW; Bronson, J. D.; Rozsa, C. M.; Youngblood, David H.; Bogucki, P.; Garg, U. (American Physical Society, 1981)[more][less]
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.24.884 Files in this item: 1
PhysRevC.24.884.pdf (539.7Kb) -
Youngblood, David H.; Lui, YW; Clark, HL. (American Physical Society, 1999)[more][less]
Abstract: The giant resonance region in Mg-24 was studied with inelastic scattering of 240 MeV alpha particles at small angles including 0 degrees. The giant resonance peak was found to extend up to E-X = 41 MeV. Isoscalar E0, E1, and E2 strength corresponding to 72+/-10%, 81(-14)(+26)%, and 72+/-10% of the respective energy weighted sum rules was identified in the peak with centroids of 21.0+/-0.6, 18.8+/-1.7, and 16.9+/-0.6 MeV and rms widths of 7.3 +/-1.2, 6.7+/-1.0, and 3.4+/-0.5 MeV, respectively. Elastic scattering was measured from theta(c.m.) = 3 degrees to 33 degrees and density dependent folding model parameters obtained. Inelastic scattering to states at 1.369, 4.122, 4.238, 6.010, 6.432, 7.349, 7.555, 7.616, and 8.358 MeV was measured and B(EL) values obtained.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.60.014304 Files in this item: 1
PhysRevC.60.014304.pdf (345.3Kb) -
Lui, YW; Clark, HL; Youngblood, David H. (American Physical Society, 2001)[more][less]
Abstract: Giant resonances in O-16 have been studied with inelastic scattering of 240 MeV alpha particles at small angles, Isoscalar E0, E1, and E2 strength corresponding to 48 +/- 10%, 32 +/- 7%, and 53 +/- 10%, of the respective energy-weighted sum rule was identified between E-x = 11 - 40 MeV with centroids of 21.13 +/- 0.49, 21.67 +/- 0.61, and 19.76 +/- 0.22 MeV and root-mean-square widths of 8.76 +/- 1.82, 7.10 +/- 0.52, and 5.11 +/- 0.17 MeV, respectively. Elastic scattering and inelastic scattering to states at 6.13, 6.92, and 11.52 MeV were measured from theta (c.m.) = 2.5 degrees to 11.5 degrees.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.64.064308 Files in this item: 1
PhysRevC.64.064308.pdf (102.0Kb) -
Lui, YW; Bogucki, P.; Bronson, J. D.; Youngblood, David H.; Garg, U. (American Physical Society, 1984)[more][less]
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.30.51 Files in this item: 1
PhysRevC.30.51.pdf (153.4Kb) -
Lui, YW; Youngblood, David H.; Tokimoto, Y.; Clark, HL; John, B. (American Physical Society, 2004)[more][less]
Abstract: The giant resonance region from 10 MeV <E-x< 55 MeV in Sn-112 and Sn-124 has been studied with inelastic scattering of 240 MeV ? particles at small angles including 0andDEG
. Essentially, all of the expected isoscalar E0-E3 strength was located in both nuclei. The isotopic dependence of the giant monopole resonance energies was found to be consistent with relativistic and nonrelativistic calculations for interactions with K-NM andSIM
220-240 MeV.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.70.014307 Files in this item: 1
PhysRevC.70.014307.pdf (798.8Kb) -
Tokimoto, Y.; Lui, Y. -W; Clark, H. L.; John, B.; Chen, X.; Youngblood, David H. (American Physical Society, 2006)[more][less]
Abstract: The giant resonance region from 9 MeV < E-x < 55 MeV in Ti-46 and Ti-48 has been studied with inelastic scattering of 240 MeV alpha particles at small angles including 0(degrees). Isoscalar monopole strength in Ti-46 (Ti-48) was found corresponding to have 71+15/-12% (96+14/-12%) of the E0 energy weighted sum rule (EWSR) with a centroid of 18.66+0.65/-0.25% MeV (18.80+0.45/-0.18% MeV), respectively. In Ti-46 (Ti-48), 46 +/- 12% (56 +/- 12%) of the E1, and 60 +/- 11% (87 +/- 11%) of the E2 EWSR were identified.
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.74.044308 Files in this item: 1
PhysRevC.74.044308.pdf (310.0Kb) -
Youngblood, David H.; Moss, JM; Rozsa, C. M.; Bronson, J. D.; Bacher, A. D.; Brown, D. R. (American Physical Society, 1976)[more][less]
Description: Journals published by the American Physical Society can be found at http://publish.aps.org/
URI: http://dx.doi.org/10.1103/PhysRevC.13.994 Files in this item: 1
PhysRevC.13.994.pdf (1.021Mb)
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